Optical: systems and elements – Light control by opaque element or medium movable in or... – With relative motion of two apertured elements
Patent
1991-03-25
1992-11-17
Ben, Loha
Optical: systems and elements
Light control by opaque element or medium movable in or...
With relative motion of two apertured elements
359889, 359821, 250232, G02B 2602
Patent
active
051650789
ABSTRACT:
A radiation aperture system where two sets of apertures are distributed in ring sections of like radius on two parallel rings. As one ring is rotated with respect to its counterpart, one aperture of each ring will align to pass a radiation beam through both apertures. Only a single aperture pair is formed at each unique time, allowing sequential measurements of all combinations of both aperture openings during rotation without halting the rotation.
REFERENCES:
patent: 2265149 (1941-12-01), Crane et al.
patent: 3333505 (1967-08-01), Unuma
patent: 4165919 (1979-08-01), Little
Hough David L.
Howard, III Willis E.
Jaworski Donald L.
Ben Loha
Coe Roger N.
Miles Inc.
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