Fast steering mirror (FSM) is an optical device commonly used in aviation. It is usually applied in the field of optical pointing, image motion compensation and stable tracking. In FSM, the material used in the mirror is usually silicon carbide or mono-crystalline silicon, which exhibits light, small size, and high optical surface accuracy. In the preparation process, bonding is the key step. The curing process of the adhesive layer usually affects the surface accuracy.
Gallium nitride (GaN) has severed as one of the most crucial photoelectronic and electronic materials during past few decades, promoting numerous advances for light emitting diodes, photodetectors and high electron mobility transistors. The wurtzite structure of GaN makes it in an inversed symmetry along the [0001] direction. Thus, GaN processes two different polarities named Ga-polar and N-polar. The modulation of GaN polarity exhibits great meaning for flexible device design with high performance.
Halide perovskites have been widely explored as efficient photo-responsive materials for applications in many optoelectronics areas owing to their unique optoelectronic properties and facile processing. However, the poor stability of these materials is still a substantial challenge for their commercialization.
Bilateral teleoperation system has been applied in numerous fields such as surgery, explosive removal and construction machinery. Good transparency (position tracking and force feedback) is an important performance index in the control design of bilateral teleoperation systems. How to improve the transparency of the bilateral teleoperation system has been the key and hot issue in the field.
The SPIDER (the Segmented Planar Imaging Detector for Electro-optical Reconnaissance) imager has attracted intensive attention because of its superior imaging performance and structural compactness. This new imaging method has been proposed based on standard imaging interferometer techniques. Through introducing photonic integrated circuits (PICs) and replacing bulk lens systems with compact lenslets array, the SPIDER is estimated to reduce size, weight, and power (SWaP) by about ten to hundred times for a similar resolution compared with conventional diffraction-limited optical systems.
Recently, the liquid crystal adaptive optics research team from Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Sciences (CAS) has built a high-density integrated beam array generation system using Liquid Crystal Optical Phased Array (LCOPA). The number of sub-beams in the integrated beam array is 40×40, and the average pointing accuracy is less than 20μrad. This study is published on Optics Communications.
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