Method and mechanism for driving optical members in an optical a

Details Method and mechanism for driving optical members in an optical a Method and mechanism for driving optical members in an optical a

1999-01-29

2000-10-17

Mai, Huy

Optical: systems and elements

Lens

With variable magnification

359700, G02B 1514

Patent

active

061340537

ABSTRACT:
A method and mechanism are disclosed for driving optical members in an optical apparatus, in which cam means formed on a lens barrel are provided with insensitive zones, so that the lens barrel is rotated to drive a diaphragm for adjustment of its diaphragm stop after the lens has been moved to the insensitive zones, then the lens barrel is rotated in the reverse direction with the diaphragm being maintained at its adjusted diaphragm stop, and thereby power variation and/or focussing of the lens as well as adjustment of the diaphragm stop are achieved using a single drive source. A cylindrical cam 40 is provided within a stationary lens barrel 30 so as to be rotatable around an optical axis S. The cylindrical cam 40 is formed with cam slits 41 each having insensitive zones 42 at longitudinally opposite ends thereof so that an enlarging lens 20 can not be further moved back and forth when lens driving pins 27 lie in these insensitive zones 42. Diaphragm driving plates 43, 44 are mounted on the inner wall of the cylindrical cam 40 so that rotation of the cylindrical cam 40 causes these diaphragm driving plates 43, 44 to drive the diaphragm driving pin 24 while the lens driving pins 27 lie in the insensitive zones 42 and thereby to vary a diaphragm stop of an iris diaphragm 22. Once the diaphragm stop has been varied, the cylindrical cam 40 is rotated in the reverse direction to move the enlarging lens 20 to a desired position for desired power variation and/or focussing.

REFERENCES:
patent: 5212598 (1993-05-01), Kikuchi
patent: 5436684 (1995-07-01), Hirasawa

Affiliated with

Also associated with

Rating

Method and mechanism for driving optical members in an optical a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and mechanism for driving optical members in an optical a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and mechanism for driving optical members in an optical a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-475074