Graded refractive index lens system

Details Graded refractive index lens system Graded refractive index lens system

1987-11-30

1988-09-20

Arnold, Bruce Y.

350432, G02B 302, G02B 1318

Patent

active

047721057

ABSTRACT:
A graded refractive index (GRIN) lens that is compact and light in weight comprising two refracting surfaces having positive powers respectively, at least one refracting surface being formed aspherically, thereby enabling to have spherical aberration, coma, astigmatism, etc., well-corrected while securing a sufficiently large working distance.

REFERENCES:
patent: 4449792 (1984-05-01), Arai et al.
patent: 4457590 (1984-07-01), Moore
patent: 4600276 (1986-07-01), Bietry
patent: 4655556 (1987-04-01), Kajitani
patent: 4668055 (1987-05-01), Nishi et al.
patent: 4671623 (1987-06-01), Chikuma
patent: 4721369 (1988-01-01), Hattori et al.

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