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We have succeeded in deriving accurate and simple Sellmeier equations for stoichiometric LiNbO3 and LiTaO3 available from visible to mid-IR region, based on the direct measurements of refractive indices and previously reported OPO experiments.
The measurement of the nonuniform intensity distribution of scattered light by a moving diffuser using an integrating sphere, which lowers the effective numerical aperture of the projection lens and affects the lowest speckle contrast, is reported. A comparison of the effective numerical apertures realized by several diffusers revealed that JIS #600 or #800 diffusers are most appropriate for efficient...
The speckle contrasts of two types of laser projectors were measured at various observation distances and observation lens pinhole diameters using a quantitative measurement technique. We found that the speckle contrast as a function of the observation numerical aperture varies with the projection architecture. In a full-frame projector, it is proportional to the numerical aperture, but it is proportional...
Stoichiometric LiNbO3 (SLN) and LiTaO3 (SLT), the high-quality crystals of which have been recently grown, are intensively investigated as next-generation nonlinear-optical materials because they have several superior properties to conventional congruent LiNbO3 (CLN) and LiTaO3 (CLT). However, the refractive indices of SLN and SLT, which are essential for accurately designing and evaluating nonlinear-optical...
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