Optical filter using microlens arrays

Details Optical filter using microlens arrays Optical filter using microlens arrays

1993-02-01

1994-09-27

Nguyen, Viet Q.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359237, 359252, 359259, 359275, 359256, 359276, 359282, 359284, 359419, G02B 2710, G02B 2300

Patent

active

053511514

ABSTRACT:
An optical filter device comprised of two parallel arrays of lenses. Each lens in the first array faces a lens in the second array to form a pixel. Lens pairs in a pixel are separated by the sum of their focal distances and include in their common focal surface a "smart" layer for modulating light passing through the focal surface. Preferred embodiments include car rear view mirrors, sunglasses, glasses for night driving, laser goggles, nuclear goggles, sun visors, sun shields, windshields, space suit helmet visors, optical instrument protection devices, window filters and energy conservation devices.

REFERENCES:
patent: 3020406 (1962-02-01), Whitney
patent: 3658467 (1972-04-01), Kitano
patent: 3714430 (1973-01-01), Finvold
patent: 4331380 (1982-05-01), Rees
patent: 4435039 (1984-03-01), Rees
patent: 4948258 (1990-08-01), Caini
patent: 5062693 (1991-11-01), Beratan
patent: 5270859 (1993-12-01), Wirth et al.
R. J. Wohl, "Short Length Optical System", IBM T.D.B., vol. 13, No. 10, p. 2947, Mar./1971.

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