Electro-optic illuminating module

Ales A. Pesl

doi:10.1117/12.28045

1 February 1991 Electro-optic illuminating module

Ales A. Pesl

Proceedings Volume 1454, Beam Deflection and Scanning Technologies; (1991) https://doi.org/10.1117/12.28045
Event: Electronic Imaging '91, 1991, San Jose, CA, United States

Abstract

There are some limiting factors in a transmission film copy mostly caused by mechanically moving parts. The subject of this paper is a new design of the electro-optic modulator for temporal scanning of light with both spectral and intensity modulations. A cube-formed module with a pair of electro-optic phase retarders processes not only the amplitude of an electromagnetic wave but also its polarization state. Thus an electro-optic modulator operating at Mc temporal sampling of (a) color range (blue, green, red), and (b) that enables intensity modulation of each color in 73 levels used in a transmission film copy is to be developed. A great number of characteristics must be fulfilled by electro-optic crystals for this particular application - namely, (a) broad spectral transmittance over the whole visible range, (b) reasonably high value of electro-optic constant, (c) short relaxation time, (d) low tangent loss, and (e) low deformation coefficients. Analysis of some materials for electro-optic modulators is stated in a sequence to the final concept with crystals performing double Pockels effect (DPE) and reaching the criteria mentioned above, particularly crystals of 23 and 43m groups of symmetry.

Citation Download Citation

Ales A. Pesl "Electro-optic illuminating module", Proc. SPIE 1454, Beam Deflection and Scanning Technologies, (1 February 1991); https://doi.org/10.1117/12.28045

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