Zoom lens

Details Zoom lens Zoom lens

1991-05-20

1993-12-07

Arnold, Bruce Y.

Optical: systems and elements

Lens

With variable magnification

359689, G02B 1514

Patent

active

052687929

ABSTRACT:
This invention relates to a compact zoom lens. The zoom lens comprises of small number of elements arranged in three groups. The first group has negative refractive power, the second group has positive refractive power and the third group has negative refractive power. The air space between each of two adjacent groups is made variable to effect zooming.

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