The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 1997
Filed:
Apr. 25, 1995
Ando Electric Co., Ltd., Tokyo, JP;
Abstract
In a light receiving module of a first aspect of the invention, a transparent plate is provided therein in such a way as to be tilted so that polarized light dependency generated thereby is equal to that generated by tilting a light receiving element and moreover in a positional relationship of being perpendicular to the latter in tilting direction. As a result, even if incident light is varied in polarized state, polarized light dependencies generated by the transparent plate and the light receiving element cancel each other to restrain the polarized light dependency of the incident light as a whole. In a light receiving module according of a second aspect of the invention, the light-emitting end surface of an optical fiber is formed in the same positional relationship relative to the light receiving surface of the light receiving element as that of the transparent plate of the first aspect of the invention. As a result, it is possible to provide a light receiving module which is reduced in polarized light dependency generated by tilting the light receiving element to be less influenced by the variation of polarized state of incident light.