Distributed index of refraction type optical element and method

Details Distributed index of refraction type optical element and method Distributed index of refraction type optical element and method

1993-02-02

1994-10-18

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

65 3013, C03C 300

Patent

active

053568400

ABSTRACT:
The distributed index of refraction type optical element consists of an element composing a glass forming oxide and a cation composing a glass modifying oxide, and has therein a distributed index of refraction imparted by a gradient of density of the element and a distributed index of refraction imparted by a gradient of density of the cation which are completely independent of each other. This optical element permits controlling chromatic aberration in various ways and has various favorable optical characteristics. The method of making the optical element comprises a first step for imparting a first distributed index of refraction to a glass body material by forming a gradient of density of the element and a second step for imparting a second distributed index of refraction to the glass body material by forming a gradient of density of the cation.

REFERENCES:
patent: 3894857 (1975-07-01), Uchida
patent: 4686195 (1987-08-01), Yamane
patent: 4755039 (1988-07-01), Hattori
patent: 4797376 (1989-01-01), Caldwell
patent: 4851024 (1989-07-01), Sakai
patent: 4902330 (1990-02-01), Sakai
Electronics Letters vol. 22 No. 21, Oct. 1986.
Mukherjee, "Gradient Index Lens Fabrication Processes; A Review", Topical Meeting on Gradient-Index Optical Imaging Systems, May 4-5, 1981, pp. 1-5.

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