Canon kabushiki kaisha (20250138281). OPTICAL SYSTEM AND IMAGING APPARATUS HAVING THE SAME
OPTICAL SYSTEM AND IMAGING APPARATUS HAVING THE SAME
Organization Name
Inventor(s)
KAZUHIKO Kajiyama of Tochigi JP
MAKOTO Takahashi of Tochigi JP
OPTICAL SYSTEM AND IMAGING APPARATUS HAVING THE SAME
This abstract first appeared for US patent application 20250138281 titled 'OPTICAL SYSTEM AND IMAGING APPARATUS HAVING THE SAME
Original Abstract Submitted
an optical system includes a front group having positive refractive power, an aperture diaphragm, and a rear group having positive refractive power, which are disposed from an object side to an image side in this order, wherein the front group includes a first lens having negative refractive power, a second lens having negative refractive power, a third lens, and a fourth lens having positive refractive power, which are disposed from the object side to the image side in this order, wherein the rear group includes a cemented lens and a positive lens disposed closest to the image side, wherein an object side surface of the second lens is an aspheric surface, and wherein a predetermined conditional expression is satisfied.