Electrically driven zoom lens barrel

Details Electrically driven zoom lens barrel Electrically driven zoom lens barrel

1992-08-28

1994-01-25

Ben, Loha

Optical: systems and elements

Lens

With variable magnification

359823, G02B 1514

Patent

active

052820904

ABSTRACT:
An electrically driven zoom lens barrel is provided with an indicating plate for indicating whether a zooming operation is being carried out in an electric mode or in a manual mode. The indicating plate is provided separately from a zooming operation ring, which is moved forwardly and rearwardly to switch a zooming operation between the electric mode and the manual mode. The indicating plate displays the manual mode when the zooming operation is carried out in the manual mode, and displays the electric mode and a zooming speed and direction, when the zooming operation is carried out in the electric mode.

REFERENCES:
patent: 3834796 (1974-09-01), Komine
patent: 4002405 (1977-01-01), Stahl
patent: 4890132 (1989-12-01), Hama
patent: 4893145 (1990-01-01), Matsuda
patent: 4936664 (1990-06-01), Haraguchi
patent: 5041855 (1991-08-01), Takezawa et al.
patent: 5164860 (1992-11-01), Suzuki et al.

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