Electromagnetic compatibility design method for low-light image intensifier

Abstract

The invention discloses an electromagnetic compatibility design method for a low-light image intensifier. The method, by separately performing electromagnetic compatibility design on a high-voltage power source, an image intensifier tube and a whole casing which constitute the low-light image intensifier, solves the contradiction between the volume weight limitation and the electromagnetic compatibility of a conventional low-light image intensifier, improves the anti-interference ability of the low-light image intensifier under a strong electromagnetic interference environment and improves theworking stability of the low-light image intensifier.

Description

technical field [0001] The invention relates to the technical field of image intensifiers, in particular to a method for designing electromagnetic compatibility of low-light image intensifiers. Background technique [0002] The low-light image intensifier is the core component of low-light night vision devices. The main factor affecting its working stability in the traditional battlefield is the intensity of incident light, which is required to be able to adapt to 10 -4 lx~10 4 lx has an even wider light range, and can image clearly in strong flash environments such as gunfire. With the development of automatic gated high-voltage power supply technology, the dynamic range and service life of image intensifiers have been greatly improved, solving the problem of imaging under strong light. [0003] The use of various reconnaissance, detection, and communication equipment in modern high-tech warfare makes the electromagnetic environment of the battlefield very complex, and th...

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Problems solved by technology

[0006] The image intensifier adopts a thin-walled, light-weight, insulated and high-voltage-resistant plastic shell, which has no electromagnetic shielding effect, and the shell cannot be connected to the input ground or the earth. It is easy to interfere with external radiation and cause the RE102 test to exceed the standard; it is also easily affected by external radiation, resulting in the RS103 test. exception occurs when

[0007] The high-voltage power supply of the image intensifier contains multiple DC-DC switching power supplies, which will inevitably generate electromagnetic interference with rich frequencies. Due to the small size of the shell, it is impossible to use large-scale filter components such as capacitors and inductors, resulting in the presence of switches on the input line. Frequency fundamental wave interference and high-order harmonic conduction interference and radiation cause CE102 and RE102 tests to exceed the standard

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