Gradient index optical element

Details Gradient index optical element Gradient index optical element

1992-10-28

1994-09-20

Ben, Loha

Optical: systems and elements

Lens

With graded refractive index

359653, 359652, 385124, 385144, 385142, G02B 300

Patent

active

053494733

ABSTRACT:
A gradient index optical element has at least one first metal dopant selected from the group consisting of La, Y, Ga, In, Ge, Sn, Zn, Zr, Ba, Ca, As, Sr, Gd and Be distributed at a concentration gradient in a glass medium. The concentration gradient of the first metal dopant defines a slope having a direction. At least one second metal dopant different from the first metal dopant and selected from the group consisting of Bi, Sb, Nb, Ti, Ta, Pb, Tl, Zr, In, Sn, Y, Ba, Ca and Sr is distributed at a concentration gradient in the glass medium. The concentration gradient of the second metal dopant defines a slope smaller than the slope of the concentration gradient of the first metal dopant. The slope of the concentration gradient of the second metal dopant is in the same direction as the slope of the concentration gradient of the first metal dopant. The thus obtained gradient index optical element has excellent chromatic aberration correction in which the Abbe number increases as the refractive index becomes large, or the change of the Abbe number is small as the refractive index increases.

REFERENCES:
patent: 3859103 (1975-01-01), Yoshiyagawa et al.
patent: 4025156 (1977-05-01), Gloge et al.
patent: 4229070 (1980-10-01), Olshansky et al.
patent: 4339174 (1982-07-01), Levin
patent: 4418985 (1983-12-01), Kasori et al.
patent: 4439008 (1984-03-01), Joormann et al.
patent: 4462663 (1984-07-01), Shimizu et al.
patent: 5166827 (1992-11-01), Noda
patent: 5171344 (1992-12-01), Noda
Kita et al., "Light-Focusing Glass Fibers and Rods", Journal of the American Ceramic Society, vol. 54, No. 7, Jul. 1971, pp. 321-326.
Ohmi et al., "Gradient-Index Rod Lens Made By A Double Ion-Exchange Process", Applied Optics, vol. 27, No. 3, Feb. 1, 1988, pp. 496-499.
Yamane et al., "Gradient-Index Glass Rods of PbO-K.sub.2 O-B.sub.2 O.sub.3 -SiO.sub.2 System", Journal of Non-Crystalline Solids, vol. 100 (1988) pp. 506-510.
Shingyouchi et al., "Radial Gradient Refractive-Index Glass Rods Prepared by Sol-Gel Method", Electronics Letters, vol. 22, No. 2, Jan. 16, 1986, pp. 99-100.
Shingyouchi et al., "r-Grin TiO.sub.2 -SiO.sub.2 Glass Rods Prepared By A Sol-Gel Method", Electronics Letters, vol. 22, No. 21, Oct. 9, 1986 , pp. 1108-1110.

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