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The combination system of a pupil filter and an imaging system can achieve super-resolution. Aiming at exploring a method for designing and simulating such a super-resolving system, this paper introduced and discussed the pupil filter design theory at first. Then, based on the knowledge, a new continuous pupil filter and a corresponding imaging system were designed. The designed super-resolving factor G and Strehl ratio S were 0.7895 and 0.40, respectively. Finally, ZEMAX software was used to simulate the whole super-resolving system. The simulation results that G equaled to 0.7826 and S equaled to 0.3768, were reasonably smaller than the designed values. The results proved the validity and accuracy of this design and simulation procedure. With this method, it is possible to do risk assessment before production and reduce cost. [ABSTRACT FROM AUTHOR]

CsPbBr 3 nanoparticles uniformly distributed on reduced graphene oxide (rGO) to form CsPbBr 3 /rGO nanocomposites are synthesized by a facile method. Their corresponding optical and X-ray photon response are investigated. UV–visible absorption spectra and photoluminescence measurements confirm that loading CsPbBr 3 nanoparticles with an even distribution onto rGO surface can enhance the absorption and photon-generated carrier transportation. Thus, a significant enhancement in optical and X-ray photon response is demonstrated in CsPbBr 3 /rGO nanocomposites as compared with pure CsPbBr 3 nanoparticles. Clear conductive switching phenomenon with a state conversion between “on” and “off” is also observed under the intermittent x-ray exposure. These results may provide a new potential application of CsPbBr 3 /rGO nanocomposites for X-ray photon detection. [ABSTRACT FROM AUTHOR]

Based on active optics, the zoom system design can no longer be confined to traditional methods of changing the distances between optical components for variable focal lengths. An all-reflective active zoom system with three mirrors is designed. The primary and third aspheric mirrors act as deformable mirrors to realize the transition among the different focal lengths by the curvature radius variation, while the second aspheric mirror is static. According to the third-order aberration theory and dimension calculations of the optical system requirements with the constraint limitations, the system's initial construction parameters can be achieved. This all-reflective active zoom system can realize zoom ratio is 3, focal length between 5 and 15 mm, field-of-view of 10–27.8°, and wide working wavelength from the visible to infrared. [ABSTRACT FROM AUTHOR]

Abstract: This paper uses the third-order aberration theory to design a reflective zoom optical system. The advantage of this method is that, by solving a set of Seidel aberration coefficient functions, it allows the designer to achieve the initial construction parameters of the optical system, i.e., radii of curvature and separations between mirrors, etc. In order to verify the accuracy of this method, a prototype of a coaxial zoom optical system with three mirrors is designed. This paper introduces the manufacturing process of the prototype in detail, describes the procedures of aligning and experimenting, and analyzes the experiment results in the end. In this way, the feasibility of this method is confirmed. [Copyright &y& Elsevier]