Optical system and image pickup apparatus having the same

Details Optical system and image pickup apparatus having the same Optical system and image pickup apparatus having the same

2011-05-17

2011-05-17

Sugarman, Scott J (Department: 2873)

Optical: systems and elements

Lens

Reverse telephoto

C359S753000

Reexamination Certificate

active

07944625

ABSTRACT:
An optical system includes a first lens unit, an aperture stop, and a second lens unit having a positive refractive power. In the optical system, the first lens unit includes at least one positive lens made of a material whose Abbe number (νdGP) and relative partial dispersion (θgFGP) satisfy a predetermined condition.

REFERENCES:
patent: 5315441 (1994-05-01), Hori
patent: 5559638 (1996-09-01), Aoki
patent: 2003/0156335 (2003-08-01), Takatsuki

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