Optical low pass filter

Details Optical low pass filter Optical low pass filter

1993-04-30

1994-12-20

LaRoche, Eugene R.

Optical: systems and elements

Prism

359832, 359833, 359834, 359835, G02B 504

Patent

active

053750136

ABSTRACT:
An optical low pass filter including a phase grating for obtaining useful picture image characteristics by provision of preferable low pass effects for each of wave form zones about the spatial frequency components beyond Nyquist limit which are required to be removed as the picture images are discretely sampled in nature in an optical system of a single tube color television camera having a color separating filter, a color video camera using solid state imaging elements, and so on, which is easier in construction to be constructed.

REFERENCES:
patent: 4472735 (1984-09-01), Shinozaki et al.
patent: 4477148 (1984-10-01), Tsuji et al.
patent: 4795236 (1989-01-01), Ise
patent: 5237446 (1993-08-01), Takahashi

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