Optical system and optical apparatus including the same

Details Optical system and optical apparatus including the same Optical system and optical apparatus including the same

2007-01-16

2007-01-16

Thompson, Timothy (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S793000, C359S795000

Reexamination Certificate

active

11450593

ABSTRACT:
At least one exemplary embodiment is directed to a telephoto type optical system capable of reliably correcting and/or reducing aberrations such as chromatic aberration. The optical system includes a refractive optical element which includes a solid-state material, a negative lens component and a positive lens component, respectively disposed on a front side relative to a pupil, the solid-state material meeting conditions of an Abbe number νd(GNL) and of a partial dispersion ratio θgF(GNL) as follows:in-line-formulae description="In-line Formulae" end="lead"?−2.100×10−3·νd(GNL)+0.693<θgF(GNL)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.555<θgF(GNL)<0.9in-line-formulae description="In-line Formulae" end="tail"?Then, a refractive power of the refractive optical element, a mean partial dispersion ratio of a material of the negative lens component, and a mean Abbe number of a material of the positive lens component are properly set.

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