Title:
POLARIZED LIGHT SEPARATING ELEMENT AND PRODUCTION THEREOF
Document Type and Number:
Japanese Patent JPH04104103
Kind Code:
A
Abstract:
PURPOSE:To provide the polarized light separating element which has a desired shape and obtain a desired polarized light separating angle by integrally molding two kinds of transparent bodies varying in refractive index to have a specified bearing. CONSTITUTION:Many sheets of transparent thin films 1, 2 which are two kinds of the transparent bodies are alternately laminated. The transparent thin film 1 is formed of hydrogen-contg. amorphous silicon and the transparent thin film 2 is formed of quartz. The hydrogen-contg. amorphous silicon and quartz which have the refractive indices of 3.823 and 1.446 respectively to incident light of 1.3mum wavelength are used. This polarized light separating element is structurally uniform in a direction Y and is inclined by a prescribed angle with the direction perpendicular to the optical main axis, i.e. the lamination plane of the two thin films 1, 2 (the direction optical and unequivocally determined with the molding consisting of the thin films 1, 2) in the Z direction which is the incident direction of the light. The incident polarized light in the direction inclined with the optical main axis is separated to ordinary light and extraordinary light by the double refractiveness occurring in the structure consisting of two kinds of the transparent bodies. The polarized light separating angle formed of both the light rays is larger as the difference in the refractive index between two kinds of the transparent bodies is larger.
Inventors:
SHIRAISHI KAZUO
KAWAKAMI SHOJIRO
KAWAKAMI SHOJIRO
Application Number:
JP22167190A
Publication Date:
April 06, 1992
Filing Date:
August 23, 1990
Export Citation:
Assignee:
KAWAKAMI SHOJIRO
SHIRAISHI KAZUO
SHIRAISHI KAZUO
International Classes:
G02B5/30; (IPC1-7): G02B5/30
Domestic Patent References:
| JPS6187101A | 1986-05-02 | |||
| JPH0375705A | 1991-03-29 |
Attorney, Agent or Firm:
Fukumori Hisao