Transfer characteristic calculation apparatus, transfer...

Details Transfer characteristic calculation apparatus, transfer... Transfer characteristic calculation apparatus, transfer...

2007-03-20

2008-10-28

Pham, Hoa Q (Department: 2886)

Optics: measuring and testing

Lens or reflective image former testing

C356S401000, C702S150000

Reexamination Certificate

active

07443493

ABSTRACT:
A transfer characteristic calculation apparatus for calculating a transfer characteristic of an imaging optical system includes a light source, a generation unit which generates a second signal by converting a first signal obtained by stretching an impulse signal on a space axis into a positive value using a light from the light source, a sensor which obtains an image that is output from the imaging optical system as an output signal when a light intensity distribution is inputted as the second signal, and a calculation unit which calculates the transfer characteristic of the imaging optical system by convolution of a third signal with the forth signal that is obtained by canceling a bias component of the output signal obtained by the sensor, the third being an impulse signal upon convolution with the first signal.

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patent: 2004-117030 (2004-04-01), None

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