Objective lens system

Details Objective lens system Objective lens system

2005-12-27

2005-12-27

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

With reflecting element

C359S661000, C359S740000, C348S552000

Reexamination Certificate

active

06980375

ABSTRACT:
An objective lens system consisting of a first lens unit having a negative refractive power and a second lens unit having a positive refractive power wherein the first lens unit or the second lens unit comprises at least one radial type gradient index lens element which has a refractive index distribution in a radial direction from an optical axis. This objective lens system favorably corrects chromatic aberration and other aberrations by adequately selecting a value expressing an Abbe's number and a refractive power of medium for the radial type gradient index lens element.

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