Measurement setup: The laser (a) emits coherent light, which passes through an aperture stop and the grating under test (b). The intensity of the diffraction orders is measured using a movable integrating sphere (c). (IMAGE)

SPIE--International Society for Optics and Photonics

Measurement setup: The laser (a) emits coherent light, which passes through an aperture stop and the grating under test (b). The intensity of the diffraction orders is measured using a movable integrating sphere (c).

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Measurement setup: The laser (a) emits coherent light, which passes through an aperture stop and the grating under test (b). The intensity of the diffraction orders is measured using a movable integrating sphere (c). Credit: 

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The Authors, doi: 10.1117/1.JOM.3.4.043501.

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