Lens assembly with adjustable focusing arrangement

Details Lens assembly with adjustable focusing arrangement Lens assembly with adjustable focusing arrangement

1996-11-22

1997-10-14

Epps, Georgia Y.

Optical: systems and elements

Lens

With support

G02B 702

Patent

active

056777990

ABSTRACT:
A lens assembly with adjustable focusing arrangement generally comprises a lens assembly which includes a supporting barrel having the lens unit disposed therein. The outer wall of the supporting barrel is slidably disposed with an adjusting knob. A barrel housing which is defined by a stationary housing and a movable housing is provided and the lens assembly, the supporting barrel and the adjusting knob are received within the barrel housing with its receiving chamber. Both sides of the barrel housing are provided with cutout for readily accessing to the adjusting knob. An aperture is provided at the front of the receiving chamber. The inner wall of the receiving chamber of the barrel housing is provided with a pair of guiding rails extending lengthwise which can be slidably engaged with the guiding grooves of the supporting barrel. The focus can be readily attained by rotating the adjusting knob. The barrel housing is provided with a locking screw to fix the focus attained. The lens assembly with adjustable focusing arrangement features a simplified structure and readily adjustment.

REFERENCES:
patent: 3765759 (1973-10-01), Yamada
patent: 3884551 (1975-05-01), Bernier
patent: 4162820 (1979-07-01), Schwab et al.
patent: 4618221 (1986-10-01), Thomas
patent: 4859029 (1989-08-01), Durell
patent: 5111476 (1992-05-01), Hollenbeck et al.
patent: 5136433 (1992-08-01), Durell
patent: 5465126 (1995-11-01), Fukuda

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