Imaging device and endoscope system provided with the same

Details Imaging device and endoscope system provided with the same Imaging device and endoscope system provided with the same

1988-05-24

1991-01-29

Arnold, Bruce Y.

Surgery

Truss

Pad

128 6, G02B 530

Patent

active

049881710

ABSTRACT:
An image forming optical system provided with an image forming lens forming an object, as an image, having large spectrum components in a specific spatial frequency on an image receiving device performing discretely spatial sampling and an optical low-pass filter that a response is reduced to zero in the specific spatial frequency or in a frequency in the vicinity thereof, in order to reduce large spatial frequency spectrum components in the image of the object which cause a false signal and moire and to thereby make it possible to photograph and observe a clear object image.

REFERENCES:
patent: 3940788 (1976-02-01), Abe et al.
patent: 4472735 (1984-09-01), Shinozaki et al.
patent: 4575193 (1986-03-01), Greivenkamp, Jr.
patent: 4676593 (1987-06-01), Aduchi et al.
patent: 4760839 (1988-08-01), Nagasaki
patent: 4761682 (1988-08-01), Adaida
patent: 4805028 (1989-02-01), Nishioka et al.
patent: 4807981 (1989-02-01), Takizawa et al.

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