JPH0370666U

JPH0370666U -

Info

Publication number: JPH0370666U
Application number: JP13163089U
Authority: JP
Priority date: 1989-11-10
Filing date: 1989-11-10
Publication date: 1991-07-16

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示すバーコードリ
ーダの一部の断面図、第２図は本実施例における
ダイクロイツクミラーの透過及び反射特性図、第
３図は本実施例における感度及び透過特性図、第
４図は可視光タイプの例を示す感度及び透過特性
図である。尚図中１０はケーシング、１１は光学読取ユニ
ツト、１２は半導体レーザ光源、１３はコリメー
タユニツト、１４はダイクロイツクミラー、１５
は集光レンズ、１６はフイルタ、１７は受光素子
、１８はガイド用発光素子である。 Fig. 1 is a cross-sectional view of a part of a barcode reader showing an embodiment of the present invention, Fig. 2 is a transmission and reflection characteristic diagram of a dichroic mirror in this embodiment, and Fig. 3 is a sensitivity and reflection characteristic diagram of a dichroic mirror in this embodiment. Transmission characteristic diagram. FIG. 4 is a sensitivity and transmission characteristic diagram showing an example of the visible light type. In the figure, 10 is a casing, 11 is an optical reading unit, 12 is a semiconductor laser light source, 13 is a collimator unit, 14 is a dichroic mirror, and 15 is a dichroic mirror.
1 is a condensing lens, 16 is a filter, 17 is a light receiving element, and 18 is a guiding light emitting element.

Claims

[Scope of Claim for Utility Model Registration] (1) A laser light source that irradiates an infrared laser beam toward an object, a guide light source that emits visible light, and an infrared laser beam that is installed in the optical path of the laser light source. a condensing lens that focuses an infrared laser beam that passes through the object and is reflected by the object in a direction different from that of the laser light source, and that focuses visible light from the guide light source and irradiates the object with the visible light; , a light splitting element installed between the laser light source and the condenser lens and having a transmission wavelength band that reflects the visible light and transmits the infrared laser beam; and an object focused by the condenser lens. an optical reader comprising: a light receiving element that receives reflected infrared laser beam light from an object through a light splitting element; the infrared laser beam light and visible light are transmitted to the object side; An optical reading device comprising: a filter having a transmission wavelength band overlapping a part of the transmission wavelength band of an element. (2) The optical reading device according to claim 1, wherein the condenser lens is formed with a hole through which the infrared laser beam is directed toward the object and passes through without changing its power.