GB285891A - Improvements in reflectors for rays emitted by a luminous source - Google Patents
Improvements in reflectors for rays emitted by a luminous sourceInfo
- Publication number
- GB285891A GB285891A GB30814/27A GB3081427A GB285891A GB 285891 A GB285891 A GB 285891A GB 30814/27 A GB30814/27 A GB 30814/27A GB 3081427 A GB3081427 A GB 3081427A GB 285891 A GB285891 A GB 285891A
- Authority
- GB
- United Kingdom
- Prior art keywords
- axis
- reflector
- source
- kjm
- onp
- 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
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
-
- 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
- F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
- F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
- F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Optical Elements Other Than Lenses (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
285,891. Pech, L. Feb. 25, 1927, [Convention date]. Reflectors.-The curves KJM, ONP represent respectively cross-sections of the upper and lower halves of a reflector adapted to reflect all rays from a source of light ABC below a plane parallel to the axis FG of the light-source and containing an axis DE. The portions KJ, ON are parabolic and have a common axis DE containing their respective foci I, H and situated at least two millimetres from the light-source. The portions JM, NP between the points J, N and the axis DE are circular, their respective centres L, Q lying on the normals JL, NQ to the parabolas KJ, ON at the points J, N at such distances that their semi-radii are less than the distances of the centres L, Q from the rectangle FGHI. The reflector may be made cup-shaped by rotating both curves KJM, ONP through 180‹ about the axis DE, or it may be made trough-shaped by displacing the curves KJM, ONP along a straight or curved line. The reflector is made of stamped or pressed brass or other metal which is silvered and polished. The Specification as open to inspection under Sect. 91 (3) (a) states also that the reflector may be made of silvered glass. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR285891X | 1927-02-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB285891A true GB285891A (en) | 1928-07-05 |
Family
ID=8887255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB30814/27A Expired GB285891A (en) | 1927-02-25 | 1927-11-16 | Improvements in reflectors for rays emitted by a luminous source |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB285891A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2150684A (en) * | 1983-11-09 | 1985-07-03 | Westfaelische Metall Industrie | Dipped vehicle headlamp |
-
1927
- 1927-11-16 GB GB30814/27A patent/GB285891A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2150684A (en) * | 1983-11-09 | 1985-07-03 | Westfaelische Metall Industrie | Dipped vehicle headlamp |
US4612608A (en) * | 1983-11-09 | 1986-09-16 | Westfalische Metall Industrie Kg Hueck & Co. | Dimmed vehicle headlight |
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