18824964. IMAGING OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS HAVING THE SAME (CANON KABUSHIKI KAISHA)
IMAGING OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS HAVING THE SAME
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IMAGING OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS HAVING THE SAME
This abstract first appeared for US patent application 18824964 titled 'IMAGING OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS HAVING THE SAME
Original Abstract Submitted
An imaging optical system includes an imaging lens, and an optical element disposed on an image side of the imaging lens. At least one surface of the optical element is a diffractive surface with a controlled wavelength dispersion characteristic. Predetermined inequalities are satisfied.