An image taking apparatus which takes a first and a second images by using an image pickup device is disclosed. The image taking apparatus comprises a controller which detects a displacement amount of the second image with respect to the first image which is a reference image and performs predetermined processing at stages of pre-exposure for object observation and exposure for image taking and a display unit which displays the first and the second images.

 
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> Polarization state detecting system, light source, and exposure apparatus

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