Patent attributes
The imaging optical system consists of, in order from a magnification side: a first optical system which makes a magnification side imaging surface and an intermediate image conjugate to each other; and a second optical system which makes the intermediate image and a reduction side imaging surface conjugate to each other. The imaging optical system is configured to be telecentric on the reduction side. The first optical system includes an aspheric lens. The second optical system consists of a front group and a rear group. The imaging optical system satisfies predetermined conditional expressions for a focal length of the front group, a focal length of the imaging optical system, a focal length of the rear group, a maximum image height, a focal length of the first optical system, and the aspheric lens of the first optical system.
