Patent ID: 6128120
Filing Date: 2000-10-03
Classification: G02B

Abstract:
A scanning optical system for forming a linear image from a two-dimensional image, comprising, in order from the two-dimensional image side:an object side lens unit;an aperture diaphragm;a rotatable deflector for deflecting light passing through the object side lens unit to perform scanning for taking in a primary image formed on an object side surface, said deflector being disposed between an exit pupil of the object side lens and the aperture diaphragm, and said deflector being a plane mirror having a deflecting surface lying on a rotational axis of the mirror; andan image side lens unit for focusing, on an image side surface, both axial and off-axial rays with respect to a sub-scanning direction, said image side lens unit being provided so that an entrance pupil thereof substantially coincides with an exit pupil of the object side lens unit.