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:
Nov. 26, 2002
Filed:
Feb. 14, 1995
Masayoshi Mori, Hyogo, JP;
Akira Chiba, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An aperture used in an optical device includes a first light-transmitting region which transmits light emitted from a light source which is provided in the optical device, and a second light-transmitting region which is provided in the periphery of the first light-transmitting region and provides light passing therethrough with a phase difference of 180° with respect to light passing through the first light-transmitting region. Thus, improvement in a function which is required for the optical device can be achieved.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile