JPS59156302U

JPS59156302U - automotive lighting

Info

Publication number: JPS59156302U
Application number: JP5084183U
Authority: JP
Inventors: 豊中田
Original assignee: 市光工業株式会社
Priority date: 1983-04-07
Filing date: 1983-04-07
Publication date: 1984-10-20

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は回転放物面状のリフレフ多を有する従゛来の自
動車用灯具の一例の縦断面図、第２図は上記の自動車用
灯具に用いられているレンズの一例を示す拡大断面図で
ある。第３図Ａは第２図のレンズによって拡散された光
の配光パターンを、同図Ｂは同光度分布をそれぞれ示す
図表である。第４図乃至第６図は本考案の１実施例を示
し、第４図は精肉柱状プリズムの形状の説明図、第５図
は光路図、第６図Ａは配光パターンの図表、第６図Ｂは
光度分布の図表である。第７図および第８図は上記と異
なる実施例を示し、第７図は光路図、第８図Ａは配光パ
ターンの図表、第８図Ｂは光度分布の図表である。１・・・リフレクタ、２・・・光源としての電球、２ａ
　　　゛・・・同フィラメント、３．　３’・・・レン
ズ、４・・・円柱プリズム、ｆ・・・リフレクタの焦点
。第３図（Ａ）Fig. 1 is a longitudinal cross-sectional view of an example of a conventional automobile lamp having a paraboloid of revolution, and Fig. 2 is an enlarged cross-sectional view showing an example of a lens used in the above-mentioned automobile lamp. It is. FIG. 3A is a chart showing the light distribution pattern of light diffused by the lens in FIG. 2, and FIG. 3B is a chart showing the same luminous intensity distribution. 4 to 6 show one embodiment of the present invention, FIG. 4 is an explanatory diagram of the shape of the meat columnar prism, FIG. 5 is an optical path diagram, FIG. 6A is a diagram of the light distribution pattern, and FIG. Figure B is a diagram of the luminous intensity distribution. 7 and 8 show an embodiment different from the above, in which FIG. 7 is an optical path diagram, FIG. 8A is a diagram of a light distribution pattern, and FIG. 8B is a diagram of a luminous intensity distribution. 1...Reflector, 2...Light bulb as a light source, 2a
゛...same filament, 3. 3'... Lens, 4... Cylindrical prism, f... Focus of reflector. Figure 3 (A)

Claims

[Scope of utility model registration request]

In an automotive lamp, a light source is provided near the focal point of a reflector having a paraboloid-shaped reflective surface, and a lens is attached to cover a front opening of the reflector, at least a portion of the lens surface, An automobile lamp characterized in that a prism is formed by arranging a plurality of shield cylindrical concave surfaces in parallel.