JPS6188113U

JPS6188113U -

Info

Publication number: JPS6188113U
Application number: JP17265984U
Authority: JP
Priority date: 1984-11-14
Filing date: 1984-11-14
Publication date: 1986-06-09

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の光アイソレータの模式的断面
図、第２図は従来の光アイソレータの模式的断面
図、第３図はその他の実施例の模式的断面図であ
る。１……光源、２……反射体、３……受光素子、
４……半透明鏡、５……偏光子、６……１／４波
長板。 FIG. 1 is a schematic sectional view of the optical isolator of the present invention, FIG. 2 is a schematic sectional view of a conventional optical isolator, and FIG. 3 is a schematic sectional view of another embodiment. 1... Light source, 2... Reflector, 3... Light receiving element,
4...Semi-transparent mirror, 5...Polarizer, 6...1/4 wavelength plate.

Claims

【実用新案登録請求の範囲】 (1) 光源から反射体に向けて発せられた入射光
から、該反射体により反射された反射光を分離し
て分離された該反射光を受光素子で受光する光学
系において、所定の偏光面の光のみを透過させる
偏光子と、透過する光の偏光面を略９０度変化さ
せる１／４波長板と、入射する光の一部を透過し
、一部を反射する半透明鏡とを、該光源から該反
射体に向けて順次配置して、該反射光を該入射光
から分離することを特徴とする光アイソレータ。 (2) 該偏光子と、該１／４波長板と、該半透明
鏡とは一体とされ、かつ該入力光の光軸に対して
傾斜して配置されることを特徴とする実用新案登
録請求の範囲第１項記載の光アイソレータ。 (3) 該偏光子と該半透明鏡には外側から透明な
ガラスが被覆されていることを特徴とする実用新
案登録請求の範囲第２項記載の光アイソレータ。[Claims for Utility Model Registration] (1) The reflected light reflected by the reflector is separated from the incident light emitted from the light source toward the reflector, and the separated reflected light is received by a light-receiving element. In an optical system, there is a polarizer that transmits only light with a predetermined polarization plane, a quarter-wave plate that changes the polarization plane of the transmitted light by approximately 90 degrees, and a quarter-wave plate that transmits part of the incident light and transmits part of it. An optical isolator characterized in that reflective semi-transparent mirrors are sequentially arranged from the light source toward the reflector to separate the reflected light from the incident light. (2) Registration of a utility model characterized in that the polarizer, the quarter-wave plate, and the semi-transparent mirror are integrated and arranged at an angle with respect to the optical axis of the input light. An optical isolator according to claim 1. (3) The optical isolator according to claim 2, wherein the polarizer and the semi-transparent mirror are coated with transparent glass from the outside.