JPS6175005U - - Google Patents
Info
- Publication number
- JPS6175005U JPS6175005U JP15921784U JP15921784U JPS6175005U JP S6175005 U JPS6175005 U JP S6175005U JP 15921784 U JP15921784 U JP 15921784U JP 15921784 U JP15921784 U JP 15921784U JP S6175005 U JPS6175005 U JP S6175005U
- Authority
- JP
- Japan
- Prior art keywords
- light source
- light
- ellipse
- optical axis
- transparent plate
- 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
- 230000003287 optical effect Effects 0.000 claims 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
第１図は本考案による面光源装置の光源の一実
施例の断面図、第２図は上記実施例の斜視図、第
３図は上記実施例の使用状態を示す断面図、第４
図は第二の実施例の断面図、第５図及び第６図は
いずれも第一の実施例の変形例を示す断面図、第
７図は第二の実施例の変形例を示す断面図である
。
１……コンデンサーレンズ、１ａ……出射面、
１ｂ……入射面、１ｃ……背面、２……光源ラン
プ、３……透明板。
FIG. 1 is a sectional view of an embodiment of the light source of a surface light source device according to the present invention, FIG. 2 is a perspective view of the above embodiment, FIG. 3 is a sectional view showing the usage state of the above embodiment, and FIG.
The figure is a sectional view of the second embodiment, FIGS. 5 and 6 are sectional views showing a modification of the first embodiment, and FIG. 7 is a sectional view showing a modification of the second embodiment. It is. 1... Condenser lens, 1a... Output surface,
1b...Incidence surface, 1c...Back surface, 2...Light source lamp, 3...Transparent plate.
Claims (1)
て形成された透明板の裏面に光を斜めに入射せし
め、その入射光が上記突条の内面で反射して上記
透明板の表面から出射するように構成された面光
源装置において、光軸を含む平面で切つた形状が
楕円である出射面と光軸を含む平面で切つた形状
が該楕円の遠い方の焦点を中心点とする円である
入射面とを備えたコンデンサーレンズと、前記焦
点に配置された光源ランプとから成ることを特徴
とする光源。 Light is made obliquely incident on the back surface of a transparent plate formed as a rough surface made up of juxtaposed protrusions with a serrated cross section, and the incident light is reflected from the inner surface of the protrusions and exits from the surface of the transparent plate. In a surface light source device configured to emit light, an emitting surface whose shape cut by a plane containing the optical axis is an ellipse, and a shape cut by the plane containing the optical axis whose center point is the far focal point of the ellipse. A light source comprising a condenser lens having a circular entrance surface and a light source lamp disposed at the focal point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15921784U JPH019046Y2 (en) | 1984-10-23 | 1984-10-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15921784U JPH019046Y2 (en) | 1984-10-23 | 1984-10-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6175005U true JPS6175005U (en) | 1986-05-21 |
| JPH019046Y2 JPH019046Y2 (en) | 1989-03-13 |
Family
ID=30717177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15921784U Expired JPH019046Y2 (en) | 1984-10-23 | 1984-10-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH019046Y2 (en) |
-
1984
- 1984-10-23 JP JP15921784U patent/JPH019046Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH019046Y2 (en) | 1989-03-13 |