Off-axis reflection-type optical antenna design method applied to space laser communication

An optical antenna and laser communication technology, applied in the field of laser communication, can solve problems such as large backscattering, loss of emission efficiency, and low transmission efficiency

Inactive Publication Date: 2014-12-24
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

The disadvantage is that the field of view is small, the backscattering is large, and the transmission efficiency is low
The transmit-receive isolation of the Cassegrain optical antenna is about 50dB, and at the same time, it has a central shield. Since the emitted beam is a Gaussian beam, a large part of the energy in the center cannot be u

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  • Off-axis reflection-type optical antenna design method applied to space laser communication
  • Off-axis reflection-type optical antenna design method applied to space laser communication
  • Off-axis reflection-type optical antenna design method applied to space laser communication

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Embodiment Construction

[0063] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0064] Such as figure 1 As shown, an off-axis reflective optical antenna design method applied to space laser communication includes the following steps:

[0065] (1) determine the initial structural parameter of optical antenna objective lens; Described objective lens comprises primary mirror, secondary mirror and three mirrors; Described initial structural parameter comprises the eccentricity e of primary mirror 1 , the eccentricity e of the secondary mirror 2 , the eccentricity e of the three mirrors 3 , distance between primary mirror and secondary mirror d 1 , the distance d between the secondary mirror and the third mirror 2 , the distance between the three mirrors and the primary mirror d 3 And the radii r of the primary mirror, secondary mirror, and third mirror 1 、r 2 、r 3 ;

[0066] The specific determination method ...

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Abstract

The invention discloses an off-axis reflection-type optical antenna design method applied to space laser communication. The off-axis reflection-type optical antenna design method includes the following steps: determining an optical antenna objective lens initial structure; calculating and selecting an optical antenna overall initial structure; conducting aberration correction; conducting optical antenna error analysis; conducting isolation analysis. According to the off-axis reflection-type optical antenna design method, under the condition that the caliber, the view field and the amplification factor of an optical antenna are guaranteed, the focal distance, the wave aberration, the structural style, the error distribution and the like of the optical antenna are analyzed and calculated. By means of the off-axis reflection-type optical antenna design method, the image quality, the isolation degree and the transmission efficiency of the laser communication optical antenna can be accurately evaluated, and correlation technical indexes of the optical antenna in the laser communication field are improved.

Description

technical field [0001] The invention relates to an off-axis reflective optical antenna design method applied to space laser communication, which can quantitatively determine the off-axis reflective optical antenna, and belongs to the technical field of laser communication. Background technique [0002] Laser communication is an important technical approach for high-speed data transmission, and the rate of single-load data transmission ranges from several Gbps to 30Gbps. The remote sensing data transmission rate of the high-resolution earth observation system has high requirements and a wide range of rates, and the data transmission equipment will also be mounted on various satellite platforms, run in different orbits, and be used in inter-satellite and satellite-ground links. The satellite-borne data transmission equipment of the high-resolution system needs to choose a modulation and demodulation method that matches the ultra-high-speed transmission, and has the characteris...

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Application Information

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IPC IPC(8): G02B17/06
Inventor 李帅陈祥付灵丽夏方园李向阳薛婧婧黄健
Owner XIAN INSTITUE OF SPACE RADIO TECH
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