Objective optical system employing grin lens

Details Objective optical system employing grin lens Objective optical system employing grin lens

2007-01-23

2007-01-23

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Lens

With graded refractive index

C359S719000

Reexamination Certificate

active

10871567

ABSTRACT:
Provided is an objective optical system employing a gradient index (GRIN) lens. A refractive index of the GRIN lens is changed in an axial direction and a direction perpendicular to the axial direction. The GRIN lens has a refractive index n satisfying the following equation:n⁡(r,z)=∑i=0⁢⁢nr2i⁢r2⁢i+∑j=0⁢⁢nzj⁢zjwhere z is a distance from the center of the lens in the axial direction and r is a distance from the center of the lens in the direction perpendicular to the axial direction. Thus, an objective optical system with a high numerical aperture can correct aberration.

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patent: 07-234358 (1995-09-01), None
patent: 08-227002 (1996-09-01), None

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