Endoscope system provided with low-pass filter for moire removal

Details Endoscope system provided with low-pass filter for moire removal Endoscope system provided with low-pass filter for moire removal

1997-08-26

2000-02-15

Tung, Bryan

Television

Special applications

With endoscope

348 75, 348342, 600181, H04N 718, A61B 104

Patent

active

06025873&

ABSTRACT:
An endoscope system including a first hard endoscope which uses a relay lens as an image transmission optical system, a second hard endoscope which uses an image guide formed by a fiber bundle, and a TV camera which is mountable respectively on the first and second hard endoscopes and which is rotatable. The TV camera has built therein a CCD. An optical low-pass filter for removing moire even in case of being rotated is provided on an ocular part of the second hard endoscope.

REFERENCES:
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patent: 4676593 (1987-06-01), Adachi et al.
patent: 4845554 (1989-07-01), Kimura et al.
patent: 4930861 (1990-06-01), Okabe et al.
patent: 4977450 (1990-12-01), Yokota
patent: 4988171 (1991-01-01), Yokota
patent: 4989959 (1991-02-01), Plummer
patent: 5392067 (1995-02-01), Konno et al.
patent: 5444574 (1995-08-01), Ono et al.
patent: 5471343 (1995-11-01), Takasugi
Television Technical Paper, pp. 19-21; Jan. 1991.

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