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:
Oct. 21, 2003
Filed:
Dec. 28, 2001
Hon Hai Precision Ind. Co., Ltd., Taipei Hsien, TW;
Abstract
An electrical variable optical attenuator includes a housing ( ), a cover ( ), an optical module ( ), and a shifting device ( ). The optical module comprises a reflective device ( ), a graded transmittance filter ( ), a filter carrier ( ), and a container ( ). The reflective device is an integrated piece comprising a first reflective plane ( ), a second reflective plane ( ), and an opening ( ) movably accommodating the graded transmittance filter therein. The first and the second reflective planes are substantially perpendicular to each other. Because the first and second reflective planes are integrally formed on the reflective device, the attenuator is relatively easy to assemble. In addition, the attenuator is able to operate reliably in rugged conditions, including applications where the attenuator may be subjected to vibration, shock or extreme temperatures.