Reflex lens system having the antivibration function
AssigneeNikon Corporation
InventorSusumu Sato
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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.
Claims9
A reflex lens system including in order of light incident;
- a first lens group having a positive forward unit and a negative rearward unit and constituting a substantially afocal system as a whole;
- a second lens group of positive refractive power;
- said forward unit in said first lens group having, in order of light incidence, a concave reflecting surface and a convex reflecting surface;
- and
- means for displacing at least a part of said second lens group across the optical axis to effect antivibration of an image.
Dependencies are inferred from the claim text.