Compact variable field of view optical system

Details Compact variable field of view optical system Compact variable field of view optical system

1997-06-16

1999-05-25

Nguyen, Thong

Optical: systems and elements

Compound lens system

Variable magnification

359399, 359857, G02B 1306, G02B 2300

Patent

active

059074337

ABSTRACT:
An optical system is provided with a plurality of field of view optical groups for insertion into the optical path. The field of view optical groups each subtend a prescribed field of view angle and are rotatably mounted on a rotary assembly for insertion into an operational position in the optical path. The rotary assembly is provided with hard stop contacts which rotate along a path and interact with stationary stops to locate the optical groups in the operational position. Additionally, movable stops are reciprocated into the rotation path of the hard stop contacts to provide additional modes, including a calibration mode. The system is also provided with extender optical groups which can be inserted in the optical path to provide intermediate fields of view between those of the field of view optical groups, thereby doubling the total number of fields of view available. The intermediate fields of view ease the transitions between fields of view achieved by the field of view optical groups and provide an effective step zoom mode of operation with increased overall zoom ratio.

REFERENCES:
patent: 3825315 (1974-07-01), Altman et al.
patent: 3947084 (1976-03-01), Noyes
patent: 4486069 (1984-12-01), Neil et al.
patent: 4877317 (1989-10-01), Gibbons et al.
patent: 4989962 (1991-02-01), Kebo
patent: 5024493 (1991-06-01), Fantozzi et al.
patent: 5089910 (1992-02-01), Sigler
patent: 5151820 (1992-09-01), Sillitto et al.
patent: 5229880 (1993-07-01), Spencer et al.
patent: 5363235 (1994-11-01), Kiunke et al.
patent: 5548439 (1996-08-01), Smith
patent: 5548442 (1996-08-01), Devenyi et al.

Affiliated with

Also associated with

Rating

Compact variable field of view optical system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Compact variable field of view optical system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compact variable field of view optical system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-404621