OPTICAL LOW-PASS FILTER AND IMAGING OPTICAL SYSTEM HAVING THE SAME

PROBLEM TO BE SOLVED: To provide an optical low-pass filter which is cheap, whose thickness is restricted, and which can be used in an optical system which needs the shortening of the optical length.SOLUTION: An optical low-pass filter according to the present invention which is obtained by photopol...

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Bibliographic Details
Main Authors HATTORI TOSHIAKI, CHATANI SHUNSUKE, TONE SEIJI
Format Patent
LanguageEnglish
Published 09.02.2012
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To provide an optical low-pass filter which is cheap, whose thickness is restricted, and which can be used in an optical system which needs the shortening of the optical length.SOLUTION: An optical low-pass filter according to the present invention which is obtained by photopolymerization of a photopolymerizable composition has a matrix 12 and a plurality of columnar structures 14 arranged in one direction in the matrix. The columnar structures have a different refraction factor from that of the matrix, are arranged in a grid manner in the surface orthogonal to the arrangement direction, and have a structure with high regularity in which the refraction factor changes in the order of 80 nm to 1000 μm.
Bibliography:Application Number: JP20110224600