Stop system for the focus of an optical instrument

Details Stop system for the focus of an optical instrument Stop system for the focus of an optical instrument

1977-06-13

1979-02-13

Corbin, John K.

350 79, G02B 704, G02B 710

Patent

active

041392680

ABSTRACT:
Disclosed is a stop system for the focus of an optical instrument having a housing carrying an objective lens. The housing has an outer body tube slidably containing a coaxial inner tube forming the housing for an imaging device. A focusing nut is secured to the inner tube against axial movement and is screw threaded to the outer tube whereupon rotation of the nut causes relative axial movement between the inner and outer tubes to focus the imaging device and objective lens relative to one another. The focusing nut has a reduced diameter short tube supporting a plurality of cascade rings. A support ring is carried by the inner tube adjacent the end of the support tube. The focusing and cascade rings carry axially projecting lugs at predetermined circumferential positions thereabout while the cascade and stop rings carry shoulders at predetermined circumferential positions thereabout. The lugs and shoulders cooperate one with the other to limit the number of revolutions of the focusing ring to a predetermined number of revolutions substantially proportional to the total number of cascade rings plus one.

REFERENCES:
patent: 2184351 (1939-12-01), Langsner
patent: 3970368 (1976-07-01), Von Belvard

Affiliated with

Also associated with

Rating

Stop system for the focus of an optical instrument does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Stop system for the focus of an optical instrument, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stop system for the focus of an optical instrument will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-688438