Reflex lens system having the antivibration function

Details Reflex lens system having the antivibration function Reflex lens system having the antivibration function

1992-02-20

1994-07-19

Sugarman, Scott J.

Optical: systems and elements

Lens

With reflecting element

359366, 359557, G02B 1700, G02B 2764

Patent

active

053314670

ABSTRACT:
An antivibration reflex lens provided with an antivibration correcting optical system is of a two-group construction having a first lens group which is a substantially afocal system having a forward unit of positive refractive power and a rearward unit of negative refractive power, and a second lens group of positive refractive power. The forward unit in the first lens group has, in order of light incidence, a concave reflecting surface and a convex reflecting surface. The rearward unit is a lens unit having negative refractive power, and focusing is effected by this lens unit. Further, the whole or part of the second lens group is displaceable across the optical axis to thereby effect antivibration correction.

REFERENCES:
patent: 4666259 (1987-05-01), Iizuka
patent: 4907868 (1990-03-01), Kitagishi et al.
patent: 4971428 (1990-11-01), Moskovich

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