Method of forming a light source by the use of a refractive inde

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G02B 300, G02B 600

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046342338

ABSTRACT:
In collimating the light beam from a light source by the use of a refractive index distribution type lens the refractive index of which on the optic axis is n.sub.0 and the refractive index n(r) of which at a position spaced by r from the optic axis is represented by

REFERENCES:
Paxton et al, "Aberrations and Design of Graded-Index (GRIN) Rods Used as Image Relays", Applied Optics, vol. 10, No. 9, 9/1971, pp. 2090-2096.
Kikuchi et al, "Graded-Index Sphere Lens with Hemispherical Rod Cladding", Applied Optics, vol. 21, No. 15, 8/1982, pp. 2734-2738.

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