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:
Jan. 23, 2001
Filed:
Mar. 18, 1996
Yasusaburo Degura, Urawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical space communication apparatus for performing communication by propagating a light beam in a free space includes a multiplexing device for multiplexing a first pilot signal with a transmission signal, a first converting device for converting a first electric signal from the multiplexing device into a first light signal, a transmitting optical system for transmitting the first light signal to a party apparatus, a receiving optical system for receiving a second light signal containing a second pilot signal, having been transmitted from the party apparatus, a second converting device for converting the second light signal into a second electric signal, an adjusting device for adjusting an angle of the receiving optical system, and a control device for controlling the adjusting device. The apparatus is further provided with an excessive light stopping device for stopping excessive light from entering the second converting device, wherein the excessive light stopping device is arranged also to serve as the adjusting device.