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. 29, 2019
Filed:
Apr. 17, 2017
Applicant:
Viavi Solutions, Inc., Milpitas, CA (US);
Inventors:
Curtis R. Hruska, Cloverdale, CA (US);
Benjamin F. Catching, Santa Rosa, CA (US);
Paula Smith, Santa Rosa, CA (US);
Assignee:
VIAVI Solutions Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J 3/02 (2006.01); G01J 3/12 (2006.01); G01J 3/26 (2006.01); G01J 3/28 (2006.01); G02B 5/28 (2006.01);
U.S. Cl.
CPC ...
G01J 3/0229 (2013.01); G01J 3/0208 (2013.01); G01J 3/0259 (2013.01); G01J 3/0262 (2013.01); G01J 3/12 (2013.01); G01J 3/26 (2013.01); G01J 3/2803 (2013.01); G02B 5/285 (2013.01); G01J 2003/1213 (2013.01); G01J 2003/1221 (2013.01); G01J 2003/1234 (2013.01); G01J 2003/2813 (2013.01);
Abstract
An optical filter is disclosed including two laterally variable bandpass filters stacked at a fixed distance from each other, so that the upstream filter functions as a spatial filter for the downstream filter. This happens because an oblique beam transmitted by the upstream filter is displaced laterally when impinging on the downstream filter. The lateral displacement causes a suppression of the oblique beam when transmission passbands at impinging locations of the oblique beam onto the upstream and downstream filters do not overlap.