5. Wavefront analysis
Instead of using birefringence to analyze a wavefront and determine the position of a light source in space by a differential method, as is done in conoscopy 8 , the wavefront is analyzed by spatial filtering. Numerous filters can be used, and two methods corresponding to industrial products are presented here:
ring masking ;
the use of a microlens array....
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Wavefront analysis
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"Mechanical and dimensional measurements"
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