Optical system

Details Optical system Optical system

2006-11-14

2006-11-14

Spector, David N. (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S642000

Reexamination Certificate

active

07136237

ABSTRACT:
Provided is an optical system, in which various aberrations including chromatic aberrations are preferably corrected and which is easily manufactured and has a superior environmental resistance, comprising a solid material (GIT1) having two surfaces both on a light incident side on a light exit side being refractive surfaces, in which following conditional expressions are satisfied:in-line-formulae description="In-line Formulae" end="lead"?νd<30,in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?θgd<−3.333×10−3·νd+1.40,in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?θgF<−2.615×10−3·νd+0.67,in-line-formulae description="In-line Formulae" end="tail"?where νd represents an Abbe number of the solid material and θgd and θgF represent partial dispersion ratios thereof.

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Apr. 6, 2005 Search Report in EP 04257489.
Mar. 17, 2006 Chinese Official Action (with English-language translation).

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