Lens position control device

Details Lens position control device Lens position control device

1989-04-18

1990-12-04

Adams, Russell E.

3541951, G03B 1336

Patent

active

049757245

ABSTRACT:
A lens position control device for an optical instrument, the instrument including a variator and a compensator, the latter of which also serves as a focusing lens, comprises a detecting circuit for detecting the positions of the variator and the focusing lens, a memory for storing information representing the location and size of an impossible-to-focus zone for the focusing lens as the function of the zooming position of the variator, and a control circuit responsive to detection of the fact that the focusing lens falls in the impossible-to-focus zone on the basis of the information stored in the memory for causing the focusing lens to retire from the impossible-to-focus zone or for prohibiting the focusing lens from further moving in a direction toward the impossible-to-focus zone.

REFERENCES:
patent: 4693581 (1987-09-01), Yamaki et al.
patent: 4748509 (1988-05-01), Otake et al.
patent: 4841325 (1989-06-01), Hoshino

Affiliated with

Also associated with

Rating

Lens position control device does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-885811