Convex-parabolic-mirror reflection enables a very wide viewing zone in a holographic three-dimensional (3D) display. In this work, segmentation is introduced to reduce the calculation time of holograms in a convex-parabolic-mirror-reflection holographic 3D display. Wavefront segmentation can practically limit the lateral spread of the wavefront to be considered, which enables the application of geometrical approximation and conventional diffraction theories such as Fresnel diffraction. Thus, diffraction calculation via the convex parabolic mirror can be derived analytically and calculated rapidly using fast Fourier transform (FFT). Our proposed FFT-based method can calculate the diffraction integral 7000 times faster than our previous method, which involved calculating directly the diffraction integral without FFT. In addition, numerical simulation and an optical experiment are presented to verify our proposal.At present, the most common materials for solar-blind UV light detectors are wide band-gap semiconductors, which generally have high requirements and complex methods for preparation. Ordinary semiconductor materials such as silicon, TiO2, and Cu2O were industrialized, but they were excluded for direct harvest of solar-blind UV light due to their inability to absorb solar-blind light photons. Here, inorganic-organic hybrid film of Y2O3Eu3+/PMMA was used as a spectral converter to realize the detection of broadband solar-blind UV light by ordinary semiconductor, converting broadband solar-blind UV luminescence to visible luminescence based on down-conversion process, after which the visible luminescence was detected by the Si photo-resister. The results show that hybrid film based on rare earth luminescence materials is particularly valuable for broadband solar-blind UV detection.Aerial cameras are widely used in a number of fields. Various mechanical errors cannot be ignored with the improvement of imaging quality requirements. This paper introduces an integrated time delay integration charge coupled device (TDICCD) aerial camera. Compared with traditional aerial cameras, it can significantly improve shooting efficiency and imaging quality under similar load conditions. This paper first analyzes mechanical errors of the integrated TDICCD aerial camera and establishes a pointing error model based on ray tracing, then performs model parameter identification using a genetic algorithm, and completes error compensation. Finally, test results demonstrate that the compensation of the pointing error can effectively improve pointing accuracy of the optical axis. The mean of comprehensive errors was reduced by an order of magnitude, and the variance of comprehensive errors was reduced from 1.0075(mm)2 to 0.0543(mm)2.We have proposed a hybrid-structured optical fiber sensor that can measure curvature, temperature, and transverse load. The hybrid structure is made by fusing a section of hollow-core fiber (HCF) between an air bubble and an up-taper. The air bubble acts as a Fabry-Perot interferometer (FPI) and at the same time serves as excitation for a Mach-Zehnder interferometer (MZI). HCF is used as an anti-resonant reflected optical waveguide (ARROW), which periodically decreases in the resonant wavelength of the optical transmission spectrum. The transverse load can be measured by demodulating the reflection spectrum of the FPI. By demodulating the wavelength shift of the MZI for temperature sensing and the intensity change of ARROW inclination for curvature sensing, the curvature and temperature can be measured simultaneously. compound library chemical The experimental results show that the transverse load sensitivity of the FPI is 1.53 nm/N. The curvature and temperature sensitivities are 33.23dB/m-1 and 20.3 pm/°C, respectively, and the cross-sensitivity is 0.0003m-1/∘C. Due to its ease of manufacture, low crosstalk, and high sensitivity, the hybrid-structured optical fiber sensor is suitable for multi-parameter measurement applications.In this study, an all-optical switch is designed using a one-dimensional two-segment-connected periodic triangular optical waveguide network, and its switching characteristics and mechanism are investigated. The performance of the switch is numerically calculated by using the network equation and the generalized eigenfunction method and we find it relatively excellent. Its switching efficiency ratio reached 3.7202×1016, which is 5 orders of magnitude larger than the best reported result. The switching threshold control energy is approximately 1.8×10-20J, which is 1 order of magnitude larger than the best reported result. The switch size is approximately 0.0672µm2 and the integration degree is up to 14per/µm2, and it can be used for micrometer chip integration. The switching time is close to 209 fs, which is the same order of magnitude as the previously reported results. In addition, the all-optical switching designed in this study not only exhibits excellent switching performance and a novel working mechanism, but also provides a new technology for the design of pump-free all-optical switching devices.The possibility of following electrochemical processes in situ and in real time using optical techniques is important in view of shining a light on the chemical processes at the surface. The interest grows if the optical apparatus is compact and can be employed in industrial quality-check protocols. Here, we show how graphite anion intercalation-an important chemical process to massively produce graphene flakes-can be monitored by a UV-vis spectrometer when the graphite works as an electrode immersed inside the electrochemical cell. Important information on the reversibility or quasi-reversibility of the reaction shows a clear visualization in optical color maps.Lidar technology is playing an important role in the application of autonomous navigation and hazard avoidance for the landing and cruising exploration on planetary bodies, such as landing on the moon, Mars, and asteroids. We report a Doppler lidar developed for Chang’E-5 mission in this paper. To meet high reliability and resource constraints, time-sharing measuring and in-phase and quadrature processing in this Doppler lidar system was provided and tested. Compared with the traditional linear frequency modulated systems, this lidar system provides excellent detection probabilities of false alarms, especially for the determination of velocity directions. Flight and vibration tests and plume experiments were carried out to further demonstrate the performance and feasibility during the landing mission in late 2020.