ES312791A1 - Light controlling devices - Google Patents
Light controlling devicesInfo
- Publication number
- ES312791A1 ES312791A1 ES0312791A ES312791A ES312791A1 ES 312791 A1 ES312791 A1 ES 312791A1 ES 0312791 A ES0312791 A ES 0312791A ES 312791 A ES312791 A ES 312791A ES 312791 A1 ES312791 A1 ES 312791A1
- Authority
- ES
- Spain
- Prior art keywords
- recesses
- projections
- panel
- apex
- bases
- 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
-
- 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
- F21V5/00—Refractors for light sources
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Optical Elements Other Than Lenses (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
A light controlling panel has one plain surface and on the other surface a pattern of recesses 12 each tapering towards but terminating short of an apex, the termination bearing a projection 16 tapering to an apex 17, the recess being pyramidal and the projection conical or vice versa and the angle of the sides of the recesses and projections to the general surface of the 2 panel being approximately equal to - (90 y degrees-c) where y is an odd integer greater than 1 and c is the critical angle of the material of the panel. The edges of the recesses may be contiguous or separated by small plain areas and narrow flat areas may also be provided in the terminations of the recesses adjacent the bases of the projections. In the preferred form the recesses are of equilateral triangular pyramidal form with conical projections at the bases, the shapes being so chosen that the apices of the cones lie in the plane of the outer edges of the recesses.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB19759/64A GB1037882A (en) | 1964-05-12 | 1964-05-12 | Light controlling devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES312791A1 true ES312791A1 (en) | 1966-03-01 |
Family
ID=10134748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0312791A Expired ES312791A1 (en) | 1964-05-12 | 1965-05-11 | Light controlling devices |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH449553A (en) |
| DE (1) | DE1472504A1 (en) |
| ES (1) | ES312791A1 (en) |
| GB (1) | GB1037882A (en) |
| NL (1) | NL6506032A (en) |
-
1964
- 1964-05-12 GB GB19759/64A patent/GB1037882A/en not_active Expired
-
1965
- 1965-05-11 ES ES0312791A patent/ES312791A1/en not_active Expired
- 1965-05-11 CH CH665365A patent/CH449553A/en unknown
- 1965-05-11 DE DE19651472504 patent/DE1472504A1/en active Pending
- 1965-05-12 NL NL6506032A patent/NL6506032A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1037882A (en) | 1966-08-03 |
| DE1472504A1 (en) | 1969-01-23 |
| NL6506032A (en) | 1965-11-15 |
| CH449553A (en) | 1968-01-15 |
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