Gradient index optical element

Details Gradient index optical element Gradient index optical element

1990-10-24

1992-11-24

Dzierzynski, Paul M.

Optical: systems and elements

Lens

With graded refractive index

359653, 359654, G02B 300, G02B 900

Patent

active

051668270

ABSTRACT:
A gradient index optical element includes a first metal which is at least one kind of metal selected from the metals of Group A each having the content of 10-40 mol % in terms of oxide and a second metal which is at least one kind of metal selected from the metals of Group B each having the content of 2-15 mol % in terms of oxide, in which the first and second metals are distributed so that the concentration of one of said first and second metals increases from the center of the optical element toward the periphery and that of the other decreases. Hence, the gradient index optical element has an important advantage in practical use that the correction for chromatic aberration is excellent, that is, the Abbe's number increases as the refractive index becomes great.

REFERENCES:
patent: 3859103 (1975-01-01), Yoshiyagawa et al.
patent: 4755039 (1988-07-01), Hattori
patent: 4971423 (1990-11-01), Nakada et al.
patent: 5032000 (1991-07-01), Shingaki et al.
Electronics Letters vol. 22, No. 21, Oct. 9, 1986, pp. 1108-1110.
Electronics Letters vol. 22, No. 2, Jan. 16, 1986, pp. 99-100.
Journal of Non-Crystalline Sounds 100 (1988) 506-510.

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