Zoom tracking apparatus

Details Zoom tracking apparatus Zoom tracking apparatus

1991-10-29

1993-05-18

Ben, Loha

Optical: systems and elements

Lens

With support

359695, 359698, 354400, 35419512, 358227, G02B 702

Patent

active

052125980

ABSTRACT:
A zoom tracking apparatus of a focusing lens in which a position of a focusing lens is controlled to an in-focus position so as to follow a motion of a zoom lens. The apparatus includes components for wobbling the focusing lens or an image pickup device in the front and back directions; and components for controlling front and back wobbling amounts of the focusing lens or the image pickup device, wherein the front and back wobbling amounts of the focusing lens or the image pickup device are changed in accordance with a relation between the position of the zoom lens and the in-focus position of the focusing lens.

REFERENCES:
patent: 4161756 (1979-07-01), Thomas
patent: 4534624 (1985-08-01), Toda et al.
patent: 4611244 (1986-09-01), Hanma et al.
patent: 4697891 (1987-10-01), Kawai
patent: 4907867 (1990-03-01), Perrin et al.

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