JPS5917437U

JPS5917437U - light source device

Info

Publication number: JPS5917437U
Application number: JP11212982U
Authority: JP
Inventors: 不破　穣一
Original assignee: 株式会社リコー
Priority date: 1982-07-26
Filing date: 1982-07-26
Publication date: 1984-02-02

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]

栢゛１図は従来の光源装置を模式的に表わした正面図、
第２図は第１図の側面図、第３図は本考案に係る光源装
置の第１図と同様な正面図、第４図は第３図の側面図、
第５図は第４図の■−Ｖ線拡大断面図、第６図は第５図
の■−■線方向から見た部分図、第７図ａ、　　ｂは従
来の光源装置と本考案に係る光源装置とにより得られる
配光特性の相違の一例を示す説明図である。１・・・シリンドリカルレンズ、５・・・光拡散板、６
・・・溝、６ａ・・・溝構成面、Ｐ、　Ｑ・・・向き。％ＪＩＪ１　°　ｌＳｔ。１鬼　、ｌ −１；９Figure 1 is a schematic front view of a conventional light source device.
2 is a side view of FIG. 1, FIG. 3 is a front view of the light source device according to the present invention similar to FIG. 1, and FIG. 4 is a side view of FIG. 3.
Figure 5 is an enlarged sectional view taken along the line ■-V in Figure 4, Figure 6 is a partial view taken from the line ■-■ in Figure 5, and Figures 7a and b show the conventional light source device and the present invention. FIG. 3 is an explanatory diagram showing an example of a difference in light distribution characteristics obtained by such a light source device. 1... Cylindrical lens, 5... Light diffusing plate, 6
...Groove, 6a...Groove configuration surface, P, Q...Direction. %JIJ 1 ° l St. 1 demon, l -1;9

Claims

[Scope of utility model registration request]

(1) In a light source device in which a plurality of point light sources are arranged linearly and a surface to be illuminated is illuminated with light from each point light source, a point light source is provided between the point light source and the surface to be illuminated. The light source device is characterized in that it is provided with a unidirectional light diffusion means that diffuses light only in substantially the same direction as the arrangement direction.

(2) The unidirectional light diffusing means is constituted by a light diffusing plate having a large number of grooves extending in a direction substantially perpendicular to the direction in which the point light sources are arranged. light source device.

(3) A large number of grooves extending in a direction substantially perpendicular to the direction in which the point light sources are arranged are formed in the cylindrical lens that has a light focusing function in a direction perpendicular to the direction in which the point light sources are arranged; The light source device according to claim 1, which is used as the unidirectional light diffusing means.

(4) The light source device according to claim 2 or 3, wherein the depths, pitches, or directions of the groove forming surfaces of the plurality of grooves are randomly set.