Patent ID: 9423600
Filing Date: 2016-08-23
CPC Classification: G02B,G02F

Claim Text:
1. An aberration correction optical unit which corrects a wave front aberration generated by an optical system, comprising: a first phase modulation element which includes an optical axis and corrects a predetermined component of a wave front aberration of the optical system for a polarized component parallel to the optical axis among a light flux passing through the optical system; a second phase modulation element which includes an optical axis and corrects the predetermined component of the wave front aberration for a polarized component parallel to the optical axis among the light flux passing through the optical system; and a variable waveplate which is disposed between the first phase modulation element and the second phase modulation element, includes an optical axis and changes a polarization characteristic of the light flux, wherein the variable waveplate is disposed so that the optical axis of the variable waveplate has a predetermined angle with respect to the optical axis of the first phase modulation element or the optical axis of the second phase modulation element.