To find CCD center relative to the C mount window

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1. Put the plano-concax lens in to the c mount window, let the plato surface face the incoming collimated beam

2. use an iris to cut the beam to be around 1mm size

3. rotate the camera to make sure the reflected pupil matches the incoming pupil

4. open the iris to fully illuminate the lens

5. The center of the circle image on the detector should be the center of the optical axis of the C mount window


Equipments:
plano-convex lens: Edmund #32006
c mount lens tube: Edmund #54615

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