Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-04-03
1991-03-12
Arnold, Bruce Y.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
35016219, 358 47, 358331, G02B 2760
Patent
active
049988000
ABSTRACT:
An optical low pass filter for use in an imaging device including an objective lens and a solid state image sensor forming a plurality of picture elements thereon, which filter comprises a diffraction grating disposed between the objective lens and the solid state image sensor. The diffraction grating is of a type which the periodicity of an image of the diffraction grating projected onto the solid state image sensor by the objective lens is selected to be twice or 1
of the periodicity of the picture element, wherein n represents an integer. The applicable imaging device may be of a type comprising an objective lens, a solid state image sensor forming a plurality of picture elements thereon, and a color filter array disposed on the solid state image snesor and including a plurality of sets of different color filter elements, or of a type comprising a single tube type color imaging device having an evacuated glass envelope, an objective lens and a color filter array including a plurality of sets of different color filter elements.
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Fujisawa Katsuya
Fujita Yoshihiro
Fujiwara Masao
Nishida Yasuaki
Uetsuki Masao
Arnold Bruce Y.
Callaghan Terry S.
Kuraray Company Ltd.
Nippon Hoso Kyokai
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