Optical system and optical apparatus including optical system

Details Optical system and optical apparatus including optical system Optical system and optical apparatus including optical system

2011-01-04

2011-01-04

Martinez, Joseph (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S676000

Reexamination Certificate

active

07864453

ABSTRACT:
Provided is an optical system in which chromatic aberrations can be excellently corrected in spite of environmental changes, to thereby maintain high optical performance. The optical system includes: a plurality of optical elements each having refractive surfaces located in a light incident side and a light exit side; and an aperture stop. A focal length, an Abbe number of a material, and an extraordinary partial dispersion ratio of each of an l-th optical element and an r-th optical element which satisfy a condition related to the extraordinary partial dispersion ratio are suitably set.

REFERENCES:
patent: 7292398 (2007-11-01), Misaka
patent: 2006/0109557 (2006-05-01), Maetaki
patent: S63-285511 (1988-11-01), None

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