The utility model relates to a lens used for improving the diffraction efficiency of a blue-ray disc and a China high definition disc, which comprises a first lens surface (1) and a second lens surface (2), wherein the first lens surface is a free curved surface, and the second lens surface is an as.....
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一种高精度光纤布喇格光栅传感器，其中气体吸收谱线用作动态波长频率基准以便连续校准激光光源的波长。所述光纤布喇格传感器包括：将来自激光器的光分为两束的光纤定向耦合器；让所述光线的一部分通过的气体单元；用于监控通过所述气体单元的光线以便确定气体吸收谱线（并因此确定光的波长）的第一光探测器；用于监控从布喇格光栅反射回来的另一部分光线并确定波长的第二光探测器；和用于同时接收来自两个光探测器的信号的计算机。
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For measuring strain in one direction within the plane of the fabric strain sensor (10), said sensor (10) comprising: a substrate coated on the elastic fabric (30) on the conductive particles or fibers and a mixture of the elastomer matrix (20).
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A system for analyzing the surface appearance of fabric is composed of a feeding mechanism for carrying a fabric to pass through a space, an image acquiring device to take multiple profiles of said fabric, and a computer, which can process the acquired images to obtain 3D data about the fabric surfa.....
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A summer dress system is applicable to a situation, the temperature of which is higher than 20 degrees Celsius. The utility model is characterized in that at least the part corresponding to the sweaty part of the human body adopts a fabric provided with a functional characteristic of managing the li.....
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