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. 07, 1978
Filed:
Dec. 19, 1975
Yoshihiro Nakamura, Toyokawa-shi, Aichi-ken, JP;
Other;
Abstract
Light emission regulation device according to which light which is emitted from a light source and is transmitted by an optical system onto a required object or objects is detected by a light detection element which is located externally to the optical system and produces or controls an output which is proportional to light incident on the light detection element and is supplied to a control means which in response controls actuation input to the light source whereby light emission is maintained at a requisite level. The light detection element being external to the optical system, light emission regulation is unaffected by the condition of elements of the optical system or material in the optical path over which light is transmitted.