Optical low pass filter

Details Optical low pass filter Optical low pass filter

1978-03-22

1979-12-11

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 55, 350162SF, H04N 906

Patent

active

041786114

ABSTRACT:
An optical low pass filter adapted for use in a single or double tube color television camera provided with an optical system including a color encoding filter for obtaining color or chrominance signals having the spatial frequency in a particular band. The low pass filter serves to cut off the high spatial frequency components of the image or luminance signals to eliminate the crosstalk between the chrominance and luminance signals. The low pass filter according to the present invention is a phase grating filter having the triangular-wave cross-sectional configuration, of which height is in a range given by a mathematical description.

REFERENCES:
patent: 3821795 (1974-06-01), Okano

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