D-KDP結晶の電気光学的特性と瞬間シャッタへの応用 (I)

概要

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As we have succeeded to growing the large single crystals of KD_2PO_4 (D-KDP), we measured the refractive indices of ordinary (n_o) and extraordinary (n_e), the half-wave voltage (V_<λ/2>) of these single crystals, and the calculated the electro-optic constant (γ_<63>). The results of those are as follows in the wave-length 589.3nm at 20℃ : n_o=1.5054,n_e=1.4665; V_<λ/2>=3920V; γ_<63>=-22.01×10^<-10>cm/V. In the next place, we calculated the relations between the transit light for the optical system of high speed shutter and it's wave-length, applied voltage and the angle of incidence etc. by the use of these constants. Then, we made the D-KDP high speed shutter elements whose thickness is 1.0mm and 1.5mm respectively, secondly took photographs of the filament of tungsten lamp by those shutters. From those results, we made clear that it can decreases the leakage light according to a thinness of the crystal plate and works sufficiently as a shutter with the applied voltage of about 2,000V.
山梨大学の論文