December 13, 2016ÄPRE Laser Focus World Article Published

This month (November 2016) Laser Focus World published our paper “Three Simple Tests to Assess Interferometer Performance. Let us know what you think.

Also get Äpre’s test target that is required to assess the imaging performance of your interferometer.

Results of the Retrace Error Test in a Generation II Interferometer

Shown here is a Generation II interferometer (ground glass disk with continuous zoom system) that exhibits significant retrace error with tilt.


Generation II laser Fizeau Interferometer exhibiting significant retrace errors with only 1.5 fringes/mm tilt
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