Shading cylinder array design method in compact multi-aperture off-axis beam combining system

Abstract

The invention discloses a method for designing a shading cylinder array in a compact multi-aperture off-axis beam combining system. The method comprises the following steps: respectively establishinga shading cylinder cylindrical curved surface space analytical equation in each off-axis beam combining system; solving the equation set to obtain the spatial position coordinates of the highest pointof the shading cylinder in each off-axis beam combining system; according to the space position coordinates of the lowest point and the highest point of the shading cylinder in each off-axis beam combining system, solving the inclination angle of the section of the inclined end surface of the shading cylinder in each off-axis beam combining system; and according to the inclination angle of the inclined section of the inner shading cylinder and a cylindrical curved surface equation of the inner shading cylinder, establishing an inner shading cylinder array of the compact multi-aperture off-axis beam combining system in three-dimensional modeling software (ProE, Cero and the like). According to the method, the inclination angle of the inclined section of the shading cylinder in the multi-aperture off-axis beam combination system is deduced mainly through a space analytic geometry method, the analysis thought can be suitable for design of the shading cylinder in any multi-aperture off-axis beam combination system, and mutual crosstalk of external stray light among sub-apertures of the multi-aperture off-axis beam combination system is effectively improved.

Description

technical field [0001] The invention relates to the technical field of stray light suppression in a laser communication system, in particular to a design method for a light-shielding cylinder array in a compact multi-aperture off-axis beam combining system. Background technique [0002] Laser communication has the advantages of high speed, low power consumption, and high security, and is an effective means to realize star-to-earth big data communication in the future. After the signal light emitted by the traditional single-aperture laser transmitter reaches the receiving plane, the spot distortion and distortion are serious, and the energy concentration is low. The beam combination (coherent combination or incoherent combination) method is used to combine multiple lasers to realize the laser array. The multi-aperture transmission system is an important way to effectively overcome the nonlinear effect of the laser gain medium, overcome the phase influence of atmospheric turb...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the fact that the existing reflective compact multi-aperture off-axis beam combining system with flush port inner shading tube array cannot effectively block the stray light from the adjacent sub-aperture outside the field of view, so that the stray light outside the field of view can directly pass through the inner The light-shielding tube enters the synthetic imaging optical path, which affects the imaging effect. The purpose of the present invention is to provide a numerical analysis design method for a new type of internal light-shielding tube array

The numerical analysis design method of the inner shading cylinder array determines the position of the oblique section of the inner shading cylinder array and the inclination angle of the oblique section through spatial analytical geometric numerical calculation, which is convenient for processing and manufacturing; The problem of mutual interference of stray light outside the field of view

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