Title: Image stabilizing optical system having a variable prism

Abstract: An image stabilized system comprising an afocal telescopic system section, deflecting means and a relay lens system section arranged in this order from the front, said deflecting means including a plano-convex and a plano-concave lens mounted in mating rotatable relation to each other, one of which is fixedly secured to the instrument housing containing the optical system in coaxial alignment with said telescopic system and relay lens system, and the other is held in fixed spatial alignment with the original line of a sight axis by means of a gyro stabilizer coupled thereto, thereby provide for stabilization of an image at the focal plane against accidental angular displacement or motions of the instrument relative to the original line of sight axis.

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Inventors: Furukawa, Hiroshi (Tokyo, JA)
Tajima, Akira (Kawasaki, JA)

Application Number: 442605
Filing Date: 1974-02-14
Publication_date: 1976-03-09
Assignee: Canon Kabushiki Kaisha (Tokyo, JA)
Primary Class(es): 359/557 356/248
Other Classes:
US Patent Ref:

2959088	Nov, 1960	Rantsch	350/16.
3378326	Apr, 1968	Alvarez	350/16.
3475074	Oct, 1969	Humphrey	350/16.
3531176	Sep, 1970	Humphrey	350/16.
3582179	Jun, 1971	Nakazawa	350/16.

Other Refs: 1,181,540

Nov, 1964	DT

Primary Examiner: Rubin, David H.
Assistant Examiner:
Attorney: Toren, McGeady and Stanger