Optical low-pass filter

Details Optical low-pass filter Optical low-pass filter

1982-05-12

1984-10-16

Arnold, Bruce Y.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

350167, 358 55, 358226, 358251, 358253, G02B 2700, G02B 504, H04N 572

Patent

active

044771487

ABSTRACT:
An optical low-pass filter is comprized of micro stripe prisms arranged on the surface of a transparent member. A transmissive medium which is of different refractive index from that of air is used to fill the grooves of the microprisms to permit the arrangement to have micro stripe prisms with a large vertex angle.

REFERENCES:
patent: 3213753 (1965-10-01), Rogers
patent: 3653747 (1972-04-01), Vogelnik
patent: 3821795 (1974-06-01), Okano
patent: 4178611 (1979-12-01), Okano

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