Zoom lens capable of being adjusted for tracking

Details Zoom lens capable of being adjusted for tracking Zoom lens capable of being adjusted for tracking

1991-01-30

1993-04-20

Arnold, Bruce Y.

Optical: systems and elements

Lens

With variable magnification

359686, 359676, G02B 1514

Patent

active

052047792

ABSTRACT:
A zoom lens consisting of a front lens portion having a plurality of lens units which are separated from each other by spaces which vary for zooming, and a rear lens portion comprising an image forming relay lens group for introducing rays of light emitted from the front lens portion to an image surface. The rear lens portion consists of a front relay group that is widely spaced ahead of a rear relay group. The rear relay group comprises a first movable lens group having a positive refractive power that moves along the optical axis for macro photography, and a second movable lens group having a positive refractive power that independently moves along the optical axis to adjust tracking.

REFERENCES:
patent: 4516839 (1985-05-01), Tokumaru
patent: 4712883 (1987-12-01), Kato et al.

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