Device for adjusting air gap between lenses

Details Device for adjusting air gap between lenses Device for adjusting air gap between lenses

1994-12-21

1996-08-20

Epps, Georgia Y.

Optical: systems and elements

Lens

With support

359823, G02B 0702

Patent

active

055484506

ABSTRACT:
A device for adjusting an air gap between lenses having a lens barrel. First and second lenses are disposed within the lens barrel, a spring provided within the lens barrel between the first and second lenses maintains the air gap between the first and second lenses, and a retainer is screw jointed to the lens barrel. The spring is compressed or expanded by tightening or loosening the retainer with respect to the lens barrel. The air gap between lenses can be adjusted to improve the lens performance and the focusing characteristic without dismantling the lenses from the lens barrel.

REFERENCES:
patent: 2905054 (1959-09-01), Logan
patent: 3402003 (1968-09-01), Mc Farland
patent: 4431267 (1984-02-01), Finck
patent: 5161061 (1992-11-01), Ihara
patent: 5177641 (1993-01-01), Kobayashi
patent: 5262900 (1993-11-01), Gerber

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