18816516. OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS (Canon Kabushiki Kaisha)
OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS
Organization Name
Inventor(s)
TOYOKATSU Fujisaki of Tochigi JP
OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS
This abstract first appeared for US patent application 18816516 titled 'OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS
Original Abstract Submitted
An optical system includes a front group, an aperture stop configured to determine an on-axis light beam, and a rear group. The front group includes a negative lens, and a first positive lens disposed on an image side of the negative lens. The rear group includes at least two positive lenses. Predetermined inequalities are satisfied.