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:
Sep. 02, 2003
Filed:
Dec. 27, 2001
Kun-Tsan Wu, Tu-Chen, TW;
Chien Cheng Chen, Tu-Chen, TW;
Hon Hai Precision Ind. Co., Ltd., Taipei Hsien, TW;
Abstract
A variable optical attenuator ( ) comprises a base ( ), a cover ( ), an attenuation device ( ), and optical fibers ( ). The attenuation device comprises a fixed collimator ( ), a movable collimator ( ), a holding device ( ), and an adjusting device ( ). The two collimators are aligned end-to-end. The holding device defines a passage ( ) in which the movable collimator is retained, and a threaded hole ( ). The adjusting device comprises a first screw rod ( ), a second screw rod ( ), and a rubber ring ( ). The first screw rod comprises a thread portion ( ), a gear ( ), and a head ( ). The thread portion of the first screw rod is rotatably engaged in the threaded hole. The second screw rod comprises a thread portion ( ) and an adjusting slot ( ). The thread portion of the second screw rod meshes with the gear of the first screw rod.