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US 4,462,661 AGranted
Laser protection goggles
AssigneeInstrument Flight Research
InventorFrank Witt
Life of this patent
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Abstract
The invention is a laser ray eye protection device comprised of a laser detector, voltage controlled lens or lenses, and related interconnecting circuitry. The lenses remain in the normally transparent state until a laser ray is sensed by the detector which energizes the lenses into a state of opacity by the interconnecting circuitry. The invention may take on numerous specific embodiments. Various partial modifications and combinations thereof are described.
Claims7
A laser ray eye protection device comprising:
- voltage controlled lens means having a first state of transparency and a second state of opacity, said voltage controlled lens means being responsive to a switching signal for switching lens means from a normal state of transparency to a state of opacity;
- detector means including a plurality of photocells mounted by suitable means along a path encompassing the perimeter of said lens, said detector means being responsive to detected radiation for generating an energizing signal whenever a laser ray crosses said path;
- and
- switching means responsive to said energizing signal of said detector means for generating said switching signal.
1 more element
Dependencies are inferred from the claim text.