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WO1994022160A1 - Systeme intensifiant la lumiere - Google Patents

Systeme intensifiant la lumiere Download PDF

Info

Publication number
WO1994022160A1
WO1994022160A1 PCT/US1993/002760 US9302760W WO9422160A1 WO 1994022160 A1 WO1994022160 A1 WO 1994022160A1 US 9302760 W US9302760 W US 9302760W WO 9422160 A1 WO9422160 A1 WO 9422160A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
tube
reflective layer
centre
reoriented
Prior art date
Application number
PCT/US1993/002760
Other languages
English (en)
Inventor
Edward G. Heflin
Original Assignee
Heflin Edward G
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heflin Edward G filed Critical Heflin Edward G
Priority to PCT/US1993/002760 priority Critical patent/WO1994022160A1/fr
Priority to AU39672/93A priority patent/AU3967293A/en
Publication of WO1994022160A1 publication Critical patent/WO1994022160A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/04—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages the fastening being onto or by the light source
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/025—Associated optical elements

Definitions

  • the present invention reorients the light flux of a fluorescent tube to places where it is needed most yielding a larger intensity of visible light. More specifically, it reorients a maximum quantity of light flux with the greatest efficiency in the direction desired.
  • the method proposed here attempts to minimise the losses due to absorption, remission, and reflection caused whenever light strikes a surface by minimising the number of reflections light undergoes before reaching the areas where it is most needed.
  • This reflective layer is that of the cylindrical light tube with which it functions.
  • This reflective layer corresponds to the same centre of the cylindrical light tube with which it functions.
  • the reflective layer is mounted on the surface either inside or outside the cylindrical light tube with which it functions.
  • fluorescent tube One important type of cylindrical light tube for which the invention can be applied is the fluorescent tube.
  • the operation of such light tubes is well known. Briefly, an electric discharge across a low pressure mercury vapour produces emissions of ultraviolet light at a
  • SUBSTITUTE SHEET frequency of 2537A Although light at this frequency is not visible to humans, this light impinges a thin fluorescent layer coating the inside of the light tube to produce visible light according to Stokes Law. The resulting light contains a part perpendicular to the surface of the tube.
  • the primary light emitted normally to the surface of the tube is reoriented in the opposite direction, passes through the centre and exits from the other side of the tube toward the areas desired.
  • the secondary light emitted at other angles to the surface of the tube is reoriented near the centre of the tube or again toward the mirror and follows a path to exit from the other side of the tube toward the desired areas (see Figures 3a and 3b).
  • the system is mounted outside the tube and directly reorients the visible light produced by the fluorescent layer of the tube.
  • the second way consists of mounting the system inside the tube to reorient the ultraviolet rays toward the other side of the tube where they undergo the process of fluorescence and consequently produce visible light.
  • the results are the same: the visible light flux composed of reoriented light and non-reoriented light, is more intense in the directions where it is most desired.
  • the invention is implemented by a system composed of an extremely reflective layer that is in direct contact with the surface of the tube, either on the interior or exterior surface of the tube.
  • the simplest system consists of two parts:
  • the thin reflective layer serves as the mirrored surface of the system. It is from a flexible material like plastic or paint with high reflectivity (greater than 95% reflectivity) and resistant to the average operational temperature of a standard fluorescent tube. The size of this thin layer depends on the tube with which it functions as well as the quantity of light flux desired (see Section Results).
  • the mechanism of attachment serves to put in contact the thin reflective layer with the fluorescent tube. It is accomplished with a cohesive material like tape or clips as shown in Figures la and lb.
  • the cohesive material or clips are made of non-toxic materials which are resistant to the average operational temperature of a standard fluorescent tube.
  • the adhesive material or clips are placed at each extremity of the thin reflective layer as well as at regular intervals along the length of the tube.
  • Two versions of the invention have been created and tested, notably one with tape and one using clips.
  • the two versions covered 50% of the surface of the light tube by the reflective layer and functioned outside the light tube. It should be mentioned that the workings of the system are exactly the same for application of the invention inside the tube, except for the fact that it is necessary to change the reflective material to that for ultraviolet light.
  • the invention increased the light flux between 32% and 36% to the areas desired,
  • the invention In comparison to a fluorescent tube with its original system of light diffusion, the invention increased the light flux between 11% a and 23% to the areas desired (according to the original system of diffusion), corresponding to an efficiency of reorientation between
  • the quantity of light flux which can be attained corresponds exactly to the surface of the fluorescent tube covered divided by the area of the surface of the entire tube according to the inverse square law for the flux of light. In application, this quantity corresponds to the angle swept by the circular-reflective layer covering the tube.
  • the corresponding quantity of light flux which can be attained by the system is calculated from the following formula:
  • SUBSTITUTE SHEET the direction of the reoriented light flux can be controlled by this method through the orientation of the thin layer on the light tube.
  • the present invention proposes a method of reorientation of light flux with a circular mirror system having the same form, the same radius, and the same centre as that of the light tube with which it functions. This allows each normal ray of light to be reoriented in the opposite direction toward the centre of the light tube.
  • the reoriented light flux passes from the centre of the light tube, exits the tube at the other side, and combines with the non- reoriented light flux to result in more visible light.
  • a cohesive material or clips connect the thin layer of extremely reflective material to the surface of the tube.
  • the system functions outside the tube by directly reorienting the visible light or inside the tube by reorienting the ultraviolet light that then undergoes the phenomena of fluorescence on the other side of the tube.
  • the invention has several advantages for increasing the visible light flux to areas desired. Among these advantages are the following:
  • TUTE SHEET 4 The system costs less than the average price of a standard fluorescent tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

Procédé de réorientation et de récupération de lumière fondé sur un système de miroir circulaire ayant le même rayon de courbure et le même centre que ceux de la source de lumière avec laquelle le système fonctionne. Ces caractéristiques permettent au système de réorienter les rayons de lumière normalement incidents sur la surface dans le sens opposé vers le centre de la source de lumière. Ce flux de lumière réorientée traverse le centre du tube lumineux, sort et se combine au flux de lumière non réorientée pour augmenter la quantité de lumière visible tombant sur les surfaces désirées. Dans un tube fluorescent le système est monté à l'extérieur de la surface du tube lumineux et réoriente directement la lumière visible, ou bien il est monté à l'intérieur du tube et réoriente la lumière ultraviolette vers l'autre côté du tube où se produit la fluorescence. Dans les deux cas, on obtient un effet d'intensification de la lumière visible aux endroits où on le désire.
PCT/US1993/002760 1993-03-22 1993-03-22 Systeme intensifiant la lumiere WO1994022160A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US1993/002760 WO1994022160A1 (fr) 1993-03-22 1993-03-22 Systeme intensifiant la lumiere
AU39672/93A AU3967293A (en) 1993-03-22 1993-03-22 Light plus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1993/002760 WO1994022160A1 (fr) 1993-03-22 1993-03-22 Systeme intensifiant la lumiere

Publications (1)

Publication Number Publication Date
WO1994022160A1 true WO1994022160A1 (fr) 1994-09-29

Family

ID=22236444

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/002760 WO1994022160A1 (fr) 1993-03-22 1993-03-22 Systeme intensifiant la lumiere

Country Status (2)

Country Link
AU (1) AU3967293A (fr)
WO (1) WO1994022160A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999060303A1 (fr) * 1998-05-18 1999-11-25 Minnesota Mining And Manufacturing Company Couche reflechissant la lumiere et dispositif emettant de la lumiere
WO2002048606A2 (fr) 2000-12-11 2002-06-20 3M Innovative Properties Company Luminaire comprenant une source lumineuse allongee et un retroreflecteur

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3225241A (en) * 1959-07-09 1965-12-21 Sylvania Electric Prod Aperture fluorescent lamp
US3767956A (en) * 1969-12-24 1973-10-23 Xerox Corp Aperture fluorescent lamp for copying machines
US4255687A (en) * 1978-02-10 1981-03-10 U.S. Philips Corporation Low pressure mercury vapor discharge lamp
US4336479A (en) * 1978-11-08 1982-06-22 Hitachi, Ltd. Fluorescent lamp having reflective layer and a method for fabricating the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3225241A (en) * 1959-07-09 1965-12-21 Sylvania Electric Prod Aperture fluorescent lamp
US3767956A (en) * 1969-12-24 1973-10-23 Xerox Corp Aperture fluorescent lamp for copying machines
US4255687A (en) * 1978-02-10 1981-03-10 U.S. Philips Corporation Low pressure mercury vapor discharge lamp
US4336479A (en) * 1978-11-08 1982-06-22 Hitachi, Ltd. Fluorescent lamp having reflective layer and a method for fabricating the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999060303A1 (fr) * 1998-05-18 1999-11-25 Minnesota Mining And Manufacturing Company Couche reflechissant la lumiere et dispositif emettant de la lumiere
WO2002048606A2 (fr) 2000-12-11 2002-06-20 3M Innovative Properties Company Luminaire comprenant une source lumineuse allongee et un retroreflecteur

Also Published As

Publication number Publication date
AU3967293A (en) 1994-10-11

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