Optical low-pass filter and imaging devices using the same

Provided is an optical low pass filter (2), for example, composed of a birefringent plate and so that a light beam separation width can be variably controlled, thereby changing the cut-off frequency in accordance with an imaging mode. The number of pixels of an imaging element (5) is set greater tha...

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Bibliographic Details
Main Authors SEI, MASAFUMI, HONDA, MASAHIKO, WAKI, KENICHIRO, MASUDA, TAKASHI, KUBOTA, HIDETOSHI
Format Patent
LanguageChinese
English
Published 16.08.2007
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:Provided is an optical low pass filter (2), for example, composed of a birefringent plate and so that a light beam separation width can be variably controlled, thereby changing the cut-off frequency in accordance with an imaging mode. The number of pixels of an imaging element (5) is set greater than the number of pixels corresponding to the animation display resolution. In a still image capturing mode, the light beam separation width can set narrower to directly use the resolution of the imaging element (5) and to suppress generation of a false color to a certain degree. On the other hand, in the animation capturing mode, by setting the light beam separation width wider, not only a high-frequency component corresponding to an unnecessary resolution component for an output image signal can be cut off, but also the suppression of false color can be performed strongly and sufficiently as compared to the still image capturing mode.
Bibliography:Application Number: TW200796101937