Zoom lens system including reflective surface which reflects...

Details Zoom lens system including reflective surface which reflects... Zoom lens system including reflective surface which reflects...

2007-09-12

2008-08-12

Sugarman, Scott J (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S684000

Reexamination Certificate

active

07411741

ABSTRACT:
There is disclosed a zoom lens system including, in order from an object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power and a fourth lens unit having a positive refractive power, and further including an aperture stop S disposed between the second lens unit and the third lens unit, during zooming from a wide-angle end to a telephoto end, a space between the lens units is changed, the first lens unit includes a single lens having a negative refractive power, a reflective optical element having a reflective surface which reflects an optical path and a sub unit having a positive refractive power, and the zoom lens system satisfies predetermined conditions.

REFERENCES:
patent: 6771432 (2004-08-01), Mihara
patent: 6975462 (2005-12-01), Mihara
patent: 7145730 (2006-12-01), Mihara
patent: 7286299 (2007-10-01), Matsui
patent: 7315423 (2008-01-01), Sato
patent: 2003/0193722 (2003-10-01), Mihara
patent: 2005/0002115 (2005-01-01), Mihara
patent: 2006/0018032 (2006-01-01), Mihara
patent: 2006/0268427 (2006-11-01), Mihara
patent: 2003-302576 (2003-10-01), None

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