Eyeguard with automatic diaphragm

Details Eyeguard with automatic diaphragm Eyeguard with automatic diaphragm

1995-05-19

1997-04-22

Callahan, Timothy P.

Optical: systems and elements

Barrel end eye guard

359612, 359739, G02B 2100

Patent

active

056233671

ABSTRACT:
An eyeguard for use on the eye-end of an optical instrument is provided having an instrument-end member adapted for connection to the optical instrument, an eye-end member adapted to interface with the periocular portion of the user's face, a hinge member disposed between the instrument-end and eye-end members having two flexible annular hinges, and a diaphragm comprising a plurality of segments attached to the interior of the hinge member between the annular hinges. The force of the user's eye pressing the eye-end member toward the instrument-end member deforms the annular hinges such that the normally closed diaphragm segments move to an open position, allowing light to pass through the eyeguard.

REFERENCES:
patent: 3594062 (1971-07-01), Disley
patent: 3715149 (1973-02-01), Freeland
patent: 4415242 (1983-11-01), Major
patent: 4601540 (1986-07-01), Karning et al.
patent: 4630903 (1986-12-01), Jones
patent: 5408359 (1995-04-01), Ferrett et al.

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