Miniature hybrid optical imaging lens

Details Miniature hybrid optical imaging lens Miniature hybrid optical imaging lens

1995-03-23

1997-10-21

Dzierzynski, Paul M.

Optical: systems and elements

Diffraction

From grating

359569, 359571, 359565, 359558, G02B 528, G02B 2744, G02B 2742

Patent

active

056802528

ABSTRACT:
A miniature lens system that corrects for imaging and chromatic aberrations, the lens system being fabricated from primarily commercially-available components. A first element at the input to a lens housing is an aperture stop. A second optical element is a refractive element with a diffractive element closely coupled to, or formed a part of, the rear surface of the refractive element. Spaced closely to the diffractive element is a baffle to limit the area of the image, and this is closely followed by a second refractive lens element to provide the final correction. The image, corrected for aberrations exits the last lens element to impinge upon a detector plane were is positioned any desired detector array. The diffractive element is fabricated according to an equation that includes, as variables, the design wavelength, the index of refraction and the radius from an optical axis of the lens system components.

REFERENCES:
patent: 2873643 (1959-03-01), St-Genies
patent: 3891975 (1975-06-01), Deml et al.
patent: 5227915 (1993-07-01), Grossinger et al.
patent: 5349471 (1994-09-01), Morris et al.

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