GB664250A - Optical device for obtaining even illumination in space - Google Patents
Optical device for obtaining even illumination in spaceInfo
- Publication number
- GB664250A GB664250A GB22775/48A GB2277548A GB664250A GB 664250 A GB664250 A GB 664250A GB 22775/48 A GB22775/48 A GB 22775/48A GB 2277548 A GB2277548 A GB 2277548A GB 664250 A GB664250 A GB 664250A
- Authority
- GB
- United Kingdom
- Prior art keywords
- space
- horizontal
- image
- prisms
- disposed
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/06—Special arrangements of screening, diffusing, or reflecting devices, e.g. in studio
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
664,250. Lighting apparatus. GRETENER, E. Aug. 30, 1948 [Sept. 3, 1947], No. 22775/48. Class 75(ii) A means for illuminating a space of predetermined dimensions by means of a single light source comprises a light reflecting or refracting surface in association with the light source, the said surface being so constructed that all rays reflected or refracted by said surface and disposed in a common vertical plane intersect at or near one common point in front of the space to be illuminated, whereas all reflected or refracted rays disposed in a common horizontal or approximately horizontal plane intersect at or near one common point at the rear of the said space. Fig. 3 shows one form of the optical system In sectional elevation and in plan view, respectively. A reflector 2, having a radius of curvature in the horizontal plane different from that in the vertical plane, receives light fom a source 1 and forms a virtual image 71 in a vertical plane and a real image 80 in a horizontal plane. The image 71 is disposed behind the space to be illuminated, which has the form of a rectangular prism having sides 3, 4 and 5, and the image 80 is disposed in front of said space. Alternatively, the images may be produced by. a prismatic refracting element 52, Fig. 4, having vertical prisms crossed by horizontal prisms. The vertical prisms refract light rays from a source 51 to produce a real image 80 behind the space to be illuminated and the horizontal prisms produce a virtual image 71 in front of said space. The light source may comprise one or more lamps radiating a fan-shaped beam, and the light-refracting surface may be formed on an element made of translucent or transparent material.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH664250X | 1947-09-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB664250A true GB664250A (en) | 1952-01-02 |
Family
ID=4527157
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22775/48A Expired GB664250A (en) | 1947-09-03 | 1948-08-30 | Optical device for obtaining even illumination in space |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB664250A (en) |
-
1948
- 1948-08-30 GB GB22775/48A patent/GB664250A/en not_active Expired
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