Simple technique for the determination of the complex transmittance of spatial light modulator

Philippe Delaye (1) , Gérald Roosen (1)

1 Laboratoire Charles Fabry de l'Institut d'Optique / Manolia

We describe a simple technique for the determination of the complex transmittance of a spatial light modulator. The technique uses the variation of the diffraction efficiency of Ronchi gratings imprinted on the SLM, as a function of the grating contrast. The measurement is made on the central peak of the diffraction structure with a monopixel detector only. The technique can also be used in quasi real time in order to adjust the SLM in the expected working regime (phase only modulation for example)

Domains: Physics [physics]; Physics [physics]; Optics [physics.optics]

Philippe Delaye, Gérald Roosen. Simple technique for the determination of the complex transmittance of spatial light modulator. Optik, 1999, 110 (2), pp.95-98. ⟨hal-00673975v2⟩