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- W2060841161 abstract "Increasing demands in the areas of machine, computer and robot vision strongly motivate the renovation of optical sensing devices. Based on the physical effect of Frustrated Total Reflection (FTR), the essence of this paper deals with the new design of optical modulators used in 3D-vision systems. Optical modulators commercially available do not meet some extended requirements for 3D applications. However, the device presented in this paper permits the specifications of optical 3D-measurement techniques like accuracy, robustness, compactness as well as fastness to be realized with higher capabilities. For this purpose, we suggest two different types of optical 2D mixers. Both are intended to explore the FTR effect to modulate light in a large aperture with minimal image aberration. In one case an air gap between media of higher dense is modulated by an rf- voltage applied to a piezo crystal as an rf-controlled tuning medium. In the other case the variation of the gap or modulation is achieved by using a surface acoustic wave device which acts as a surface grating medium due to the effect of a travelling periodic corrugation. The integrated optical components play a substantial role for the optical modulation and imaging. Some simulation results of this optical devices show that the inherent non-linearity of the FTR modulator may be neglected in practical applications, thus yielding a high modulation depth. Furthermore, a 3D- image system adapting this modulation optics is also depicted in the paper." @default.
- W2060841161 created "2016-06-24" @default.
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- W2060841161 date "1996-08-23" @default.
- W2060841161 modified "2023-09-23" @default.
- W2060841161 title "<title>New optical 2D modulators of large aperture for 3D-vision systems</title>" @default.
- W2060841161 doi "https://doi.org/10.1117/12.246682" @default.
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