Patent ID: 7944490
Filing Date: 2011-05-17
Classification: H04N

Abstract:
1. An image pickup apparatus comprising: an element-including optical system including an optical system and an optical wavefront modulation element that modulates an optical transfer function; a variable aperture; a detector attached at a position where the relative positions of said detector and said element-including optical system are determined by adjusting said variable aperture, said detector picking up an object image that passes through said optical system, said variable aperture, and said optical wavefront modulation element; and a converter for generating an image signal with a smaller blur than that of a signal of a blurred object image output from said detector, wherein when an optical axis of said optical system is z axis and tow axes perpendicular to each other are x and y axes, a phase of said optical wavefront modulation element is expressed as follows: z=exp{i times SUM j=1 Cjx m y n )} where m and n are integers and j=[(m+n) 2 +m+3n]/2, absolute value of x is less then or equal then 1, absolute value of is less then or equal then 1 are satisfied.