Small zoom optical system

Details Small zoom optical system Small zoom optical system

1996-06-03

1998-08-18

Nelms, David C.

Optical: systems and elements

Lens

With variable magnification

359714, G02B 1514, G02B 302

Patent

active

057965277

ABSTRACT:
A small, high performance zoom optical system has a simple structure that includes a positive lens group having a positive refractive power and a negative lens group having a negative refractive power arranged on an image side of the positive lens group. The positive lens group includes, in order from an object side, a first lens component with a negative refractive power, a second lens component with a negative refractive power and a third lens component with a positive refractive power. The first lens component has a meniscus shape with a concave surface facing the object side. Zooming is performed by changing the distance between the positive lens group and the negative lens group.

REFERENCES:
patent: 5541772 (1996-07-01), Lin

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