Lens system

Details Lens system Lens system

2007-11-06

2007-11-06

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

With graded refractive index

C359S652000

Reexamination Certificate

active

11321196

ABSTRACT:
A lens system (10) includes a main lens (12) having a first surface (12a) and a second surface (12b) configured opposite to each other, a first film lens (11) and a second film lens (13) respectively secured on the first surface and the second surface of the main lens. The first film lens and/or the second film lens are radial gradient index lenses, which refractive index progressively decreases from the centers to the outmost sides. All of the main lens, the first film lens and the second film lens are converging lens, and the axles of them are overlapped one to another.

REFERENCES:
patent: 4215914 (1980-08-01), Muchel et al.
patent: 6147809 (2000-11-01), Corbasson et al.

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