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. 09, 2004
Filed:
Apr. 02, 2002
Kun-Tsan Wu, Tu-Chen, TW;
Chien-Cheng Chen, Tu-Chen, TW;
Hon Hai Precision Ind. Co., Ltd., Taipei Hsien, JP;
Abstract
A motor driven variable optical attenuator ( ) comprises a base ( ), a cover ( ), an attenuation device ( ), and a motor ( ). The attenuation device comprises a fixed collimator ( ), a movable collimator ( ) retained in a holding device ( ), and an adjusting device. The two collimators are aligned end-to-end. The adjusting device comprises a first screw rod ( ), and a second screw rod ( ). The first screw rod comprises a thread portion ( ) rotatably engaged in the holding device, and a gear ( ). The second screw rod comprises a thread portion ( ), and a head ( ). The thread portion of the second screw rod meshes with the gear of the first screw rod. The motor comprises a cylindrical projection ( ) engaged in the head of the second screw rod. The motor rotates the second screw rod, which drives the first screw rod, which laterally moves the holding device.