Endoscope

Details Endoscope Endoscope

1993-04-07

1996-11-19

Nguyen, Thong

Optical: systems and elements

Compound lens system

With relay

359362, 359423, 600160, G02B 2300, A61B 100

Patent

active

055768822

ABSTRACT:
An endoscope comprising, in order from the object side, an objective optical system and image relaying optical systems disposed in a number of n, and using, in a (n-1)th or nth image relaying optical system, an optical system for producing positive distortion so as to cancel negative distortion produced by the objective optical system, thereby correcting distortion favorably in the endoscope as a whole.

REFERENCES:
patent: 4784118 (1988-11-01), Fantone et al.
patent: 4916534 (1990-04-01), Takahashi et al.
patent: 5005957 (1991-04-01), Kanamori et al.
patent: 5142410 (1992-08-01), Ono et al.

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