Adjustment structure for fast locating zoom lens

Details Adjustment structure for fast locating zoom lens Adjustment structure for fast locating zoom lens

1999-09-14

2000-12-19

Epps, Georgia

Optical: systems and elements

Lens

With support

359694, 359818, 359826, G02B 702, G02B 1514

Patent

active

061634182

ABSTRACT:
A zoom lens comprises a fixed cylinder, an outer movable cylinder, and an inner movable cylinder which is provided in the interior thereof with a shutter and a front group lens. The front group lens is fixed by an outer frame which is fastened with the shutter. The outer frame retains a chain plate capable of being driven by a rotary plate of the shutter. The chain plate has an indicator portion. The inner movable cylinder is provided in the inner wall thereof with a reference indicium, which is level with and aligned with the indicator portion of the chain plate at such time when the zoom lens is located at various focusing positions.

REFERENCES:
patent: 3817601 (1974-06-01), Colaiace et al.
patent: 6046864 (2000-04-01), Onda
patent: 6094535 (2000-07-01), Onda

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