JPS5466577A - Lens for automobile lamp - Google Patents
Lens for automobile lampInfo
- Publication number
- JPS5466577A JPS5466577A JP13326077A JP13326077A JPS5466577A JP S5466577 A JPS5466577 A JP S5466577A JP 13326077 A JP13326077 A JP 13326077A JP 13326077 A JP13326077 A JP 13326077A JP S5466577 A JPS5466577 A JP S5466577A
- Authority
- JP
- Japan
- Prior art keywords
- prism
- cut
- angle
- light rays
- light source
- 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.)
- Granted
Links
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
PURPOSE: To provide the subject lens wherein the angle of the leading end of prism cut part constituting Fresnel cut is made constant, and the angle of forming the prism cut part is varied whereby light rays can be replaced by parallel light rays even at a position space apart from the light source.
CONSTITUTION: The prism cut part is formed into such a shape that light rays emitted from a light source 6 are fully reflected so as to form parallel light rays with respect to the front surface of the prism cut 5. That is, a light ray e incident on the prism cut 5 deflects at a predetermined angle, and fully reflects at other surface of the prism cut 5 and is irradiated to the outside in parallel to the axis Y. The angle between the central side surface of the prism part and the reference axis is represented by θ, the angle formed by the light source 6 and the cut 5 of the prism part by α, and the forward end angle of the cut 5 of the prism part by β. Then, the following relationship is established.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13326077A JPS5466577A (en) | 1977-11-07 | 1977-11-07 | Lens for automobile lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13326077A JPS5466577A (en) | 1977-11-07 | 1977-11-07 | Lens for automobile lamp |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5466577A true JPS5466577A (en) | 1979-05-29 |
JPS5713962B2 JPS5713962B2 (en) | 1982-03-20 |
Family
ID=15100450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13326077A Granted JPS5466577A (en) | 1977-11-07 | 1977-11-07 | Lens for automobile lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5466577A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59128102U (en) * | 1983-02-17 | 1984-08-29 | 市光工業株式会社 | Vehicle lights |
US5949346A (en) * | 1995-06-07 | 1999-09-07 | Toyoda Gosei Co., Ltd. | Light-driven display device |
-
1977
- 1977-11-07 JP JP13326077A patent/JPS5466577A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59128102U (en) * | 1983-02-17 | 1984-08-29 | 市光工業株式会社 | Vehicle lights |
US5949346A (en) * | 1995-06-07 | 1999-09-07 | Toyoda Gosei Co., Ltd. | Light-driven display device |
Also Published As
Publication number | Publication date |
---|---|
JPS5713962B2 (en) | 1982-03-20 |
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