JP2013019978A - Retina projection display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a retina projection display device which superimpose various display video on object video of a real world, and clearly projection-displays the superimposed video on a retina of an eye, without adjusting a focus of the eye.SOLUTION: A liquid crystal panel 53, a lens system 70, a pin hole element 80, a half mirror 90, and a concave mirror 100 are successively and coaxially arranged. A focus f of the lens system 70 is positioned at a center of the hole element 80 with a spherical center of the concave mirror 100. A distance between the liquid crystal panel 53 and the lens system 70 is adjusted so as to position an image point of the lens system 70 at the focus of the concave mirror 100. Therefore, reflection light of the concave mirror 100 becomes parallel light and enters the half mirror 90. Consequently, external light indicating object video of a real world and display light of the liquid crystal panel 53 becomes superimposed light and are emitted from the half mirror 90 toward eyes of a driver, under the reflection parallel light from the concave mirror 100 to the half mirror 90.

Description

  For example, in the field of augmented reality (Argument Reality) technology, the present invention displays a projected image by projecting a superimposed image obtained by superimposing an electronic image such as detailed information on the real world on an object such as a scene in the real world on the retina. The present invention relates to a retinal projection display device.

  As this type of retinal projection display device, for example, a line-of-sight-dependent retinal display device disclosed in Patent Document 1 below has been proposed. In this retinal display device, the virtual image light is incident on the concave mirror through the pinhole and the half mirror, the reflected virtual image light reflected by the concave mirror is reflected by the half mirror, and the target light is incident on the half mirror, The reflected virtual image light by the half mirror is incident on the retina of the human eye together with the target light that passes through the half mirror. This means that the virtual video and the target are projected onto the retina as a superimposed video by the virtual video light and the target light.

JP 2002-90688 A

  By the way, in the retinal display device, the virtual image light emitted from the pinhole is incident on the concave mirror as diverging light, reflected by the concave mirror, and condensed at a position different from the focal point of the concave mirror. Therefore, the reflected virtual image light by the concave mirror described above becomes divergent virtual image light.

  Therefore, even if such divergent virtual image light is reflected by the half mirror and then enters the human retina together with the target light, the divergent virtual image light does not form an image on the retina. As a result, there arises a problem that a virtual image, and thus a superimposed image cannot be projected clearly on the retina.

  Therefore, in order to deal with the above-described problem, the present invention provides a retinal projection display device that clearly displays a superimposed image obtained by superimposing various display images on a real-world object on the retina of the eye. It is intended to provide.

In resolving the above problems, a retinal projection display device according to the present invention, according to the description of claim 1,
An image display device (50) for emitting image display light representing an image;
A pinhole element coaxially disposed on the image display device and its emission side, and the pinhole portion (81) narrows down the image display light from the image display device and emits it as pinhole display light A Hall element (80);
The pinhole element is coaxially arranged on the emission side so as to face both the pinhole element and the real world object, and the portion of the pinhole display light from the pinhole element is transmitted as transmission display light. A partially light-transmitting plate (90),
A concave mirror (100) which is coaxially disposed on the opposite side of the partial light transmitting plate and its pinhole element and reflects the transmitted display light from the partial light transmitting plate and concentrically with the pinhole element. And with
The partially transmissive plate reflects a portion of the reflected display light from the concave mirror as a partially reflected display light, and superimposes a portion of the target light representing the target from the real world target by superimposing the partially reflected display light on the part. Light is transmitted as partial target light so as to be superimposed light and projected onto the retina of the human eye.

  In the retinal projection display device, the image display device and the pinhole element are arranged coaxially so that the reflected display light from the concave mirror to the partially transparent plate is parallel light. A convex lens system (71, 72) for forming an image of the image display light within a predetermined on-axis range including the focal point of the concave mirror through the pinhole portion coaxially with the pinhole element is provided.

  According to this, the convex lens that forms an image on the focal point of the concave mirror through the pinhole portion coaxially with the pinhole element so that the reflected display light from the concave mirror becomes parallel light. Only by arranging the system between the image display device and the pinhole element as described above, the image based on the superimposed light can be clearly projected onto the retina.

  Note that the predetermined on-axis range described above is an image of the concave lens focal point and convex lens system that allows an image to be projected onto the retina substantially clearly within a focal depth range that does not cause blurring and diffraction in the pinhole element. The on-axis deviation range of the concave mirror between points.

According to a second aspect of the present invention, in the retinal projection display device according to the first aspect, the focal point (f) of the convex lens system is coaxial with the pinhole element together with the spherical center of the concave mirror. , Is set at the same position as the pinhole part,
The distance between the image display device and the convex lens system is adjusted so that the image point of the convex lens system is positioned at the focal point of the concave mirror.

  Thereby, the effect of the invention of claim 1 can be achieved more specifically.

  According to a third aspect of the present invention, in the retinal projection display device according to the first or second aspect, the axis on which the partial light transmission plate projects the superimposed light passes through the center of the pupil of the eye. It is characterized by that.

  Thereby, the image represented by the superimposed light can be clearly projected and displayed on the retina.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means as described in embodiment mentioned later.

It is a perspective view which shows the example which applied one Embodiment of the retinal projection display apparatus which concerns on this invention to goggles. 2 is a longitudinal section showing the retinal projection display device of FIG. 1 together with a human eye and a passenger car. It is a figure which shows typically the optical system of the retinal projection display apparatus of FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows an embodiment in which a retinal projection display device D according to the present invention is applied to goggles G.

  In this embodiment, the goggles G are employed for motorcycle drivers, and the goggles G include a frame 10, left and right windshield lenses 20, and a rubber belt 30. The frame 10 is configured by extending left and right arm portions 12 in an L shape from left and right end portions of the left and right lens frame portions 11. The left and right side windshield lenses 20 are fitted into the left and right side lens frame portions 11 of the frame 10. The rubber belt 30 is connected between the extended end portions of the left and right arm portions 12.

  Therefore, the goggles G are used by mounting the frame 10 and the rubber belt 30 on the head of the driver so that the left and right windshield lenses 20 are opposed to the left and right eyes of the driver.

  As shown in FIG. 1, the retinal projection display device D is supported by the left lens frame portion 11 of the left and right lens frame portions 11 of the goggles G.

  The retinal projection display device D includes an L-shaped casing 40 as shown in FIG. 1 or FIG. The L-shaped casing 40 is configured by a flat rectangular cylinder 40a and an L-shaped long rectangular cylinder 40b. The flat rectangular cylinder 40a has two screws 42a, It is assembled to the upper edge portion 11a of the left lens frame portion 11 of the frame 10 via the support plate 43 and the support plate 43, and is supported on the front side of the left windshield lens 20.

  Here, the flat rectangular cylinder 40 a opens forward at the front annular opening 44, and the front transparent plate 44 a is fitted into the front annular opening 44. Further, the flat rectangular cylinder 40a is opposed to the left windshield lens 20 at the rear annular opening 45 (see FIG. 2), and the rear annular plate 45 includes a rear transparent plate 45a. Is inserted (see FIG. 2).

  The L-shaped long rectangular cylinder 40b has a proximal-side rectangular cylinder 47, a distal-side rectangular cylinder 48, and a boundary cylinder 49. The proximal-side cylinder 47 is a flat rectangular cylinder. A left wall opening 46 of 40a (see FIG. 2) is integrally and coaxially extended leftward. The distal end side cylinder portion 48 is bent rearwardly from the extending end portion of the proximal end side rectangular cylinder portion 47 via the boundary cylinder portion 49 and extends along the left arm portion 12 of the frame 10.

  As shown in FIG. 1 or FIG. 2, the boundary cylinder part 49 is formed between the proximal-side rectangular cylinder part 47 and the distal-side rectangular cylinder part 48, and the boundary cylinder part 49 is formed on the proximal-end side. It is formed in a planar shape on the inner wall surface 49a (see FIG. 2) on the extending direction side of the rectangular cylindrical portion 47. Here, the inner wall surface 49a in the extending direction forms an angle of 45 ° with respect to the axis of the liquid crystal panel 53, and the inside of each of the base end side rectangular tube portion 47 and the distal end side rectangular tube portion 48 is inclined and coaxial. It is formed to face.

  Both the screws 42a and 42b and the support plate 43 described above serve as a position adjustment support mechanism that supports the flat rectangular cylinder 40a to the left lens frame portion 11 of the frame 10 so that the vertical and horizontal positions can be adjusted.

  In this position adjustment support mechanism, the screw 42a is screwed with a female screw hole portion 43a formed at the center of the front end of the support plate 43 so as to be relatively movable in the vertical direction at the lower neck male screw portion. The lower neck male screw portion of the screw 42a is relatively moved in the vertical direction in the support hole portion of the support wall 41a projecting from the front left and right central portion of the upper wall 41 of the flat rectangular cylinder 40a at the tip portion. It is supported so as to be impossible and relatively rotatable.

  Thereby, the flat rectangular cylinder 40a is supported by the support plate 43 by the screw 42a so that the flat wall 40a is positioned on the upper wall 41 below the support plate 43 and in parallel with the support plate 43. Further, by moving the screw 43a in the vertical direction with respect to the female screw hole 43a of the support plate 43, the position can be adjusted in the vertical direction along the left windshield lens 20 of the flat rectangular cylinder 40a.

  Further, the screw 42b passes through a long hole portion 43b formed in the rear left-right direction central portion of the support plate 43 at the neck lower male screw portion, and is located in the rear left-right direction center of the upper wall 41 of the flat rectangular cylinder 40a. The screw 42b is screwed into the upper and lower sides of the upper wall 41 of the flat rectangular tubular body 40a at the head thereof. It is designed to be clamped on the center. Accordingly, the flat rectangular cylinder 40a is supported by the screw 42b and the support plate 43 so as to face the left windshield lens 20 at the rear opening 45.

  Here, the long hole portion 43b is formed in the shape of a long hole in the left-right direction at the center portion on the rear side of the support plate 43, and the width in the front-rear direction of the long hole portion 43b is outside the neck portion of the screw 42b. Somewhat larger than the diameter. Accordingly, if the screw 42b is loosened by moving it upward, the support plate 43, in other words, the flat rectangular cylinder 40a is moved in the left-right direction along the upper edge portion 11a of the left lens frame portion 11 of the frame 10. The position can be adjusted.

  Further, as shown in FIG. 2, the retinal projection display device D includes a liquid crystal display 50, a reflection mirror 60, a lens system 70, a pinhole element 80, a half mirror 90, and a concave mirror 100. The liquid crystal display 50, the reflection mirror 60, the lens system 70, the pinhole element 80, the half mirror 90, and the concave mirror 100 are arranged in an L-shaped casing 40 from an L-shaped rectangular tube 40b to a flat rectangular tube 40a. It is housed over.

  The liquid crystal display 50 includes a light emitting element 51, an illumination lens 52, and a transmissive liquid crystal panel 53. The light emitting element 51, the illumination lens 52, and the transmissive liquid crystal panel 53 are as shown in FIG. The L-shaped rectangular cylindrical body 40b is sequentially accommodated and supported from its extended end portion toward the axial intermediate portion 47.

  Here, the light emitting element 51 is made of a light emitting diode, and the light emitting element 51 is coaxial with the illumination lens 52 so as to face the illumination lens 52 at the light emitting portion thereof. 40b is supported on its extended end side. Thereby, the light emitting element 51 emits light by driving and emits white light toward the illumination lens 52.

  The illumination lens 52 is assembled between the light emitting element 51 and the liquid crystal panel 53 in the L-shaped rectangular cylinder 40b coaxially with the light emitting element 51 and the liquid crystal panel 53. The illumination lens 52 includes the light emitting element 51 and the liquid crystal panel 53. The white light from 51 is emitted toward the liquid crystal panel 53 as parallel light.

  The liquid crystal panel 53 is assembled in the L-shaped rectangular cylinder 40b coaxially with the illumination lens 52 on the opposite side of the illumination lens 52 from the light emitting element 51. Display information is displayed by receiving the parallel light from 52. This means that the liquid crystal panel 53 emits display light including the display information based on the parallel light from the illumination lens 52. Note that the fact that the light emitting element 51, the illumination lens 52, and the liquid crystal panel 53 are coaxially positioned means that the axes of the light emitting element 51, the illumination lens 52, and the liquid crystal panel 53 are the same optical axis.

  The reflecting mirror 60 is fixed along the inner wall surface 49a in the extending direction in the boundary cylinder portion 49 of the L-shaped elongated rectangular cylinder 40b. The reflecting mirror 60 is a liquid crystal panel on the reflecting surface. 53 and the lens system 70 face coaxially.

  Therefore, the reflection mirror 60 receives and reflects the display light from the liquid crystal panel 53 on the reflection surface, and emits the reflected light toward the lens system 70 as reflected display light.

  The lens system 70 is coaxially assembled in the base end side rectangular cylinder portion 47 of the L-shaped long rectangular cylinder 40b on the extended end side thereof. The lens system 70 includes a thick convex lens 71 and a color. It is composed of an erasing concave lens 72.

  The convex lens 71 faces the reflection mirror 60, and the convex lens 71 coaxially enters the reflected display light from the reflection surface of the reflection mirror 60, collects it, and emits it toward the concave lens 72.

  The concave lens 72 serves to remove chromatic aberration that occurs in light of a plurality of wavelengths. The concave lens 72 is coaxially disposed on the exit side so as to follow the convex lens 71. Accordingly, the concave lens 72 removes the chromatic aberration of the reflected display light of the reflection mirror 60 emitted from the convex lens 71 and emits the light toward the pinhole element 80.

  In the present embodiment, the focal point f of the lens system 70 is set at the same position as the center of a pinhole portion 81 (described later) of the pinhole element 80 as shown in FIG. This means that the lens system 70 condenses the reflected display light from the reflection mirror 60 on the center of the pinhole portion 81 of the pinhole element 80. However, in this embodiment, the liquid crystal panel 53 and the lens system 70 are reflected so that the reflected display light from the reflection mirror 60 collected on the center of the pinhole portion 81 forms an image at the focal point of the concave mirror 100 as described later. The distance on the optical axis is adjusted.

  The pinhole element 80 is a thin flat plate, and the pinhole element 80 serves as a pinhole lens. The pinhole element 80 is assembled coaxially with the lens system 70 at the exit side portion of the concave lens 72 in the base end side rectangular tube portion 47, and the pinhole element 80 has a pinhole portion 81, a lens It is formed coaxially with the system 70.

  Accordingly, the pinhole element 80 receives the light emitted from the concave lens 72 and receives it at the center of the pinhole portion 81, and as a pinhole light representing an inverted image of the display information, a half mirror 90 (described later). Exit toward

  In the present embodiment, the inner diameter of the pinhole portion 81 of the pinhole element 80 is set as follows. That is, the smaller the inner diameter of the pinhole portion 81, the deeper the focal depth by the pinhole element 80, so that information in the real world, for example, the flat rectangular cylinder of the passenger car A (see FIG. 2) and the retinal projection display device D Even if the distance from the front transparent plate 44a of 40a changes, the information in the real world is projected on the retina Ic of the driver's left eye I, which will be described later, as a clear image.

  However, if the inner diameter of the pinhole portion 81 is too small, a light diffraction phenomenon occurs and the sharpness of the projected image on the retina Ic decreases. On the other hand, the greater the inner diameter of the pinhole portion 81, the shallower the depth of focus. This means that if the inner diameter of the pinhole portion 81 is too large, the depth of focus becomes too shallow. Therefore, when the distance between the passenger car A and the left eye I changes under such a shallow depth of focus, there is a possibility that defocusing occurs in the projected image on the retina Ic. This means that the projected image on the retina Ic becomes unclear due to defocusing.

  Therefore, the inner diameter of the pinhole portion 81 is within a range that does not cause the light diffraction phenomenon, the depth of focus by the pinhole element 80 is as deep as possible, and a value within the range that does not cause the occurrence of the defocusing. Is set. This means that the depth of focus by the pinhole element 80 is set deep within a range that does not cause the light diffraction phenomenon and the above-mentioned defocusing.

  The half mirror 90 is positioned coaxially with the pinhole element 80 at the center, and is inclined by 45 ° with respect to the axis of the pinhole element 80 so as to face both the pinhole element 80 and the front transparent plate 44a. At the corners, they are assembled in an inclined manner in the flat rectangular cylinder 40a.

  Thus, the half mirror 90 receives the pinhole light from the pinhole element 80, passes through the portion, and emits it toward the concave mirror 100 as partially transmitted light. Further, the half mirror 90 reflects a portion of reflected light emitted from the concave mirror 100 as described later as partially reflected light, and partially excludes the portion of outside light representing the passenger car A that is the above-described real-world information. The light is transmitted as light, and is emitted toward the driver's left eye I through the rear transparent plate 45a as superimposed light obtained by superimposing the partial reflected light and the external light. This means that the half mirror 90 projects and displays the superimposed light on the retina Id through the cornea Ia, pupil Ib, and lens Ic of the left eye I.

  In this embodiment, the retinal projection display device D is supported by the goggles G so as to face the driver's left eye so that the axis from which the half mirror 90 emits the superimposed light passes through the center of the pupil Ib of the left eye I. The Thereby, the half mirror 90 projects the superimposed light onto the retina Id through the center of the pupil Ib of the left eye I of the driver, so that the image represented by the superimposed light has a radius R (see FIG. 3) and the inner diameter of the pinhole portion 81 of the pinhole element 80 described above, the image is displayed as a clear image on the retina Id.

  The concave mirror 100 is assembled coaxially with the half mirror 90 on the emission side of the half mirror 90 in the flat rectangular cylinder 40 a, and the concave reflecting surface 101 of the concave mirror 100 faces the half mirror 90. doing. However, the spherical center of the concave mirror 100 is located at the center of the pinhole portion 81, in other words, at the focal point f of the lens system 70 (see FIG. 3). Further, the focal point of the concave mirror 100 is located at a radius of 1/2 on the optical axis of the concave mirror 100 and at the center of the half mirror 90. In the present embodiment, the image point of the lens system 70 (corresponding to the image formation point of the display image of the liquid crystal panel 53) is the concave mirror 100 with respect to the object point of the lens system 70 (corresponding to the display image of the liquid crystal panel 53). Is located at the focal point of the concave mirror 100 on the optical axis. The radius of the concave mirror 100 corresponds to the length on the optical axis of the concave mirror 100 between the center of the concave mirror 100 and the concave reflecting surface 101 of the concave mirror 100.

  Therefore, when the concave mirror 100 receives the transmitted light from the half mirror 90 on the concave reflecting surface 101 and reflects the reflected light toward the half mirror 90 as reflected light, the reflected light is converted into parallel light as the half mirror 90. Is incident on.

  In the present embodiment, the pinhole element 80, the half mirror 90, and the concave mirror 100 are coaxially positioned because the pinhole element 80, the half mirror 90, and the concave mirror 100 are positioned on the same optical axis in each axis. It means to do.

  In the present embodiment configured as described above, if a motorcycle driver wears the goggle G, the retinal projection display device D is connected to the flat rectangular tube 40a via the left windshield lens 20 of the goggle G. Opposite the left eye I of the driver. Note that the left and right eyes of the driver are normal. In the present embodiment, the windshield lens 20 does not have a lens function.

  Thus, in the retinal projection display device D, when the liquid crystal display 50 emits display light from the liquid crystal panel 53, the lens system 70 receives the display light and emits it toward the pinhole element 80. Then, the pinhole element 80 stops the display light from the lens system 70 by the pinhole portion 81 and emits it as pinhole light (see FIG. 3).

  Here, since the focal point f of the lens system 70 is located at the center of the pinhole portion 81 of the pinhole element 80 as described above, the display light emitted from the lens system 70 is at the center of the pinhole portion 81. After being condensed, the light is emitted from the pinhole element 80 toward the half mirror 90 as the above-described pinhole light.

  When the pinhole light emitted toward the half mirror 90 is incident on the half mirror 90 in this way, the pinhole light is transmitted through the half mirror 90 as partially transmitted light at a light amount half that light amount. Then, the light enters the concave mirror 100. The partially transmitted light incident in this manner is reflected by the reflecting surface 101 by the concave mirror 100, is incident again on the half mirror 90, and is reflected as partially reflected light.

  Here, as described above, the focal point f of the lens system 70 and the spherical center of the concave mirror 100 are located at the center of the pinhole portion 81 of the pinhole element 80, and the image point of the lens system 70 is located at the focal point of the concave mirror 100. Therefore, the partially reflected light reflected from the concave mirror 100 toward the half mirror 90 becomes parallel light.

  On the other hand, when the external light representing the passenger car A (see FIG. 2) is incident on the half mirror 90, the external light passes through the half mirror 90 and is emitted from the half mirror 90 as partial external light at a light amount half that light amount. To do.

  Then, the partial reflected parallel light and the partial light described above are emitted as superimposed light from the half mirror 90 toward the retina Id through the ideal lens Ie. Therefore, the image represented by the display light emitted from the liquid crystal panel 53 is projected and displayed on the retina Id of the left eye I together with the image of the passenger car A under the partially reflected parallel light from the concave mirror 100. The ideal lens Ie described above is equivalently composed of the cornea Ia, pupil Ib, and crystalline lens Ic of the left eye I.

  Here, the focal point f of the lens system 70 and the spherical center of the concave mirror 100 are located at the center of the pinhole portion 81 of the pinhole element 80 as described above. In addition, as described above, the depth of focus by the pinhole element 80 is set deep within a range that does not cause the light diffraction phenomenon and the occurrence of the defocusing.

  For this reason, the superimposed light emitted toward the pupil Ib of the eye I differs in the distance between the passenger car A and the front transparent plate 44a of the flat rectangular cylinder 40a of the retinal projection display device D. However, it can be projected clearly onto the retina Id without requiring any focus adjustment.

  Further, as described above, the projection axis of the superimposed light by the half mirror 90 passes through the center of the pupil Ib, so that the image represented by the display light emitted from the liquid crystal panel 53 can be clearly projected and displayed on the retina Id. This means that the image represented by the display light emitted from the liquid crystal panel 53 can be clearly projected and displayed on the retina Id together with the image of the passenger car A.

In carrying out the present invention, the following various modifications are possible without being limited to the above embodiment.
(1) In carrying out the present invention, the half mirror 90 described in the above embodiment may be located off the focal point of the concave mirror 100.
(2) In carrying out the present invention, the half mirror 90 described in the above embodiment is not limited to this, and is a partially light-transmitting plate that transmits part of the incident light (not limited to 50%). There may be.
(3) The present invention is not limited to the goggles G described in the above embodiment, but may be applied to a mobile phone or a head-up display of an automobile.
(4) Further, in the application of the present invention, the pinhole portion 81 of the pinhole element 80 is different from the above embodiment in that the pinhole element 80 is spaced apart from the pinhole portion 81 along the circumference centered on the pinhole element 80. Alternatively, it may be formed. According to this, even if the eye I moves or the like, the incident of the superimposed light from the half mirror 90 to the eye I does not deviate from the pupil, so that the projected image on the retina Ic can be easily seen. .
(5) In implementing the present invention, both the left and right lenses of the goggles G may be lenses corresponding to myopia or hyperopia instead of the windshield lens 20.
(6) In carrying out the present invention, the image of the image display device 50 is projected clearly on the retina together with the image of the passenger car A within a deep depth of focus range that does not cause the above-described blurring and diffraction phenomenon in the pinhole element 80. If the deviation between the focal point of the concave mirror and the image point of the lens system 70 is within a predetermined axial deviation range (predetermined axial range of the concave mirror) that is possible, the image can be clearly seen. Can do.

50 ... Liquid crystal display, 70 ... Lens system, 71 ... Convex lens, 72 ... Concave lens,
80 ... pinhole element, 81 ... pinhole part, 90 ... half mirror,
100: concave mirror, f: focus.

Claims (3)

An image display device that emits image display light representing an image;
A pinhole element coaxially disposed on the image display device and its emission side, wherein the pinhole portion squeezes the image display light from the image display device and emits it as pinhole display light When,
The pinhole element and a portion of the pinhole display light from the pinhole element are coaxially arranged on the emission side so as to face both the pinhole element and the real world object, and transmit a portion of the pinhole display light from the pinhole element as transmissive display light. A partially translucent plate that emits light;
A concave mirror that is coaxially arranged on the opposite side of the partial light transmission plate and the pinhole element, and reflects the transmission display light from the partial light transmission plate and concentrically with the pinhole element. And with
The partial light transmitting plate reflects a portion of the reflected display light from the concave mirror as a partially reflected display light, and converts a portion of the target light representing the target from the real world target to the partially reflected display light. In a retinal projection display device that transmits light as a partial target light so as to be superimposed light upon projection and projected onto the retina of the human eye,
The video display from the video display device is arranged coaxially between the video display device and the pinhole element so that the reflected display light from the concave mirror to the partial light transmission plate is parallel light. A retinal projection display device comprising a convex lens system that forms an image of light in a predetermined axial range including a focal point of the concave mirror through the pinhole portion and coaxially with the pinhole element. The focal point of the convex lens system is set at the same position as the pinhole part, coaxially with the pinhole element, together with the spherical center of the concave mirror,
The retinal projection display apparatus according to claim 1, wherein a distance between the image display apparatus and the convex lens system is adjusted so that an image point of the convex lens system is positioned at a focal point of the concave mirror.   The retinal projection display apparatus according to claim 1, wherein an axis on which the partial light transmission plate projects the superimposed light passes through a center of the pupil of the eye.

Images