GB414062A - Improvements in mirrors and projectors - Google Patents
Improvements in mirrors and projectorsInfo
- Publication number
- GB414062A GB414062A GB2373/33A GB237333A GB414062A GB 414062 A GB414062 A GB 414062A GB 2373/33 A GB2373/33 A GB 2373/33A GB 237333 A GB237333 A GB 237333A GB 414062 A GB414062 A GB 414062A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- stevenson
- reflectors
- deviate
- extent
- 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
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/322—Optical layout thereof the reflector using total internal reflection
Abstract
414,062. Reflectors. STEVENSON, C. A., Radella, Fidra Road, North Berwick, and STEVENSON, D. A., 22, Gleneairn Crescent, Edinburgh. Jan. 25, 1933, No. 2373. [Class 75 (ii).] Reflectors for light projectors, comprising glass backed by a reflecting substance, have non-spherical surfaces which deviate from parabolas to such an extent that, as determined by the angle of incidence of the light rays and by the refractive index and thickness of the glass, accurate focusing or parallelizing of the reflected rays is effected, and the thickness of the glass is uniform throughout. The Figure shows a part of a reflector having surface A' B<1> and C<1> D<1> which deviate from parabolic surfaces AB, CD to such an extent that a ray from the focus F emerges, after refraction and reflection, along a line G<1> H parallel to the axis, instead of in a direction GL which is not parallel to the axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2373/33A GB414062A (en) | 1933-01-25 | 1933-01-25 | Improvements in mirrors and projectors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2373/33A GB414062A (en) | 1933-01-25 | 1933-01-25 | Improvements in mirrors and projectors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB414062A true GB414062A (en) | 1934-07-25 |
Family
ID=9738395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2373/33A Expired GB414062A (en) | 1933-01-25 | 1933-01-25 | Improvements in mirrors and projectors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB414062A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0214595A2 (en) * | 1985-08-30 | 1987-03-18 | GTE Products Corporation | Lamp reflector |
-
1933
- 1933-01-25 GB GB2373/33A patent/GB414062A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0214595A2 (en) * | 1985-08-30 | 1987-03-18 | GTE Products Corporation | Lamp reflector |
| EP0214595A3 (en) * | 1985-08-30 | 1990-01-24 | GTE Products Corporation | Lamp reflector |
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