For the problem of precision deficiency of the analysis model caused by nonlinear factors of the joint parts in the 150 mm mirror, the equivalent linearized model and the model updating method were presented. First, the experimen

A high-power LED uniform light source with one large-size near-focus aspherical lens is designed based on the principles of geometric optics and non-imaging optics. First of all, the parameters of the aspherical lens are obtained

Laue crystal monochromator are commonly used to monochromate high-energy X-rays (above 50 keV). Through bending the thin crystal, focused monochromatic beams could be obtained. However, twisted deformation would inevitably occur d

This paper researches on laser damage characteristics of Ⅱ-type DKDP crystals used for nonlinear frequency conversion of third harmonic under 355 nm laser with 35 ps, 850 ps and 7.6 ns pulse duration. The damage threshold, probabi

We present and demonstrate a fiber-optic sensor based on single-ended detection that measures both temperature and refractive index. The cladding of the two microsphere-structured fibers is spliced together, and the end of the fib

Accurate focus positioning of a laser beam is an important basis for improving laser engraving, cutting and welding accuracy, but the traditional methods are not fit for automatically finding high-power laser focuses. The plasma c

In order to broaden the bandwidth of high power microwave radiation antenna, an X-band high power circularly polarized reflectarray antenna constructed by mechanically rotational helical elements is proposed and investigated. The

According to the miniaturization and high performance, the characteristic of a second-order bandpass filter (BPF) with in-line ports based on dual-mode square-shaped resonator is researched, and higher-order BPFs with in-line port

The failure mechanism of Xilinx’s FPGA chip XC7A200T-2FBG676 under RF interference is studied. When RF interference injects into the power supply pins of the FPGA core, it is found that with the increase of interference intensity

Infrared target tracking is heavily influenced by illumination variation, small size and complex background, and the lack of target information makes the algorithm lose targets easily. Therefore, an algorithm based on convolution

A large number of various radar signals in modern warfare make the electromagnetic environment more and more complex. It is urgent to quickly and accurately obtain the category information of the target track from a large number o

Aiming at the problem that there is no unified understanding about the current electromagnetic situational cognition, this paper takes the radar confrontation situation in the electromagnetic situation as the research object, prop

To evaluate the threat of high-altitude electromagnetic pulse HEMP environment on a shortwave receiving antenna system, pulsed current injection tests for the front-end equipments near the antenna, including some commercial surge

A mathematical method is proposed to calculate the field distribution theoretically of folded half mode substrate integrated waveguide(FHMSIW) for the first time. The phase constant is also given using an improved multi-line metho

In this paper, a high voltage and high frequency pulse generator based on metal oxide semiconductor field effect transistor (MOSFET) switch is designed. Several series MOSFETs triggered by optical fiber signal isolation are used a

A beam orbit stability of 0.1 μm is required by the High Energy Photon Source (HEPS). As an important system of the storage ring, the beam position monitors (BPMs), together with the measured data, play an important role in the be

In order to reflect the behavior of the nuclear materials in the operating reactor veritably and roundly, and to supply reliable data for the safety review of the nuclear materials, the most effective solution is building a fuel t

As a part of the reflectometer in China Spallation Neutron Source (CSNS), data acquisition system (DAQ) of 3He tubes detector should not only have basic functions of data readout and processing, but also coordinate the whole opera

A high-performance real-time control system is designed for magnet power supply in tokomak, which is based on LabVIEW RT and field programmable gate array (FPGA) techniques. According to the real-time control requirements of the m