Endoscope

Details Endoscope Endoscope

1987-03-20

1989-01-31

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250227, 350336, G01J 132

Patent

active

048017922

ABSTRACT:
An endoscope provided with a stop comprising an annular electrochromic element arranged in an objective lens unit so that the transmittance of the stop is varied in accordance with the amount of light from an object to be observed which has been measured, in order to prevent brightness in a field of view from being rapidly changed when the distance from the distal end portion of the endoscope to the object to be observed is varied.

REFERENCES:
patent: 4313663 (1982-02-01), Stemme et al.
patent: 4333720 (1982-06-01), Suzuki et al.
patent: 4340811 (1982-07-01), Yamashita et al.
patent: 4678900 (1987-07-01), Nishioka
patent: 4704520 (1987-11-01), Kanno et al.

Affiliated with

Also associated with

Rating

Endoscope does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Endoscope, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Endoscope will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-178782