Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1993-02-05
1994-12-27
LaRoche, Eugene R.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 58, 359 63, 359 85, 2 8, 2431, B23K 932, A61F 906
Patent
active
053770323
ABSTRACT:
A frame assembly for a light shutter including a frame structure for enclosing an electro-optic shutter assembly, the frame structure having a front surface which can be positioned opposite a cover lens, and a switch for controlling an operation mode of the electro-optic shutter assembly, the switch being mounted on the front surface whereby pressure applied to the cover lens activates the switch. The frame assembly can be inserted and used in a welding helmet or other protective eyewear having a standard sized lens aperture.
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U.S. Patent Application Ser. No. 07/943,994 to John D. Fergason filed Sep. 11, 1992.
Fergason Jeffrey K.
Fergason John D.
LaRoche Eugene R.
Mai Son
OSD Envizion Company
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