Vari-focal lens system

Details Vari-focal lens system Vari-focal lens system

1989-01-26

1991-03-12

Arnold, Bruce Y.

G02B 15177

Patent

active

049990071

ABSTRACT:
A vari-focal lens system comprising, in the order from the object side a movable front lens unit having negative refractive power and a movable rear lens unit having positive refractive power, said front lens unit consists of a negative lens component and a positive lens component or a single negative lens component, and said rear lens unit comprising at least one negative lens component. Said vari-focal lens system consists of a very small number of lens components, concretely specifically three or four lens components.

REFERENCES:
patent: 4647160 (1987-03-01), Ikemori
patent: 4792215 (1988-12-01), Sato

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