Lens system using unhomogenous media

Optical: systems and elements – Lens – With graded refractive index

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359683, G02B 300, G02B 1514

Patent

active

051173085

ABSTRACT:
A lens system comprising, at locations in the vicinity of each other, radial type graded refractive index lens elements made of a medium having a positive refractive power and other radial type graded refractive index lens elements made of a medium having a negative refractive power. This lens system has aberrations corrected favorably with the radial type graded refractive index lens elements which are made of materials easily preparable.

REFERENCES:
patent: 4639094 (1987-01-01), Aono
patent: 4755039 (1988-07-01), Hattori
patent: 4762403 (1988-08-01), Hattori
Atkinson et al.; "Design of a Gradient-Index Photographic Objective"; Applied Optics, vol. 21, pp. 993-998, Mar. 15. 1982.

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