Laser microthruster

A technology of micro thrusters and lasers, applied in the field of propulsion systems, can solve problems such as optical pollution and substrate material waste, and achieve the effect of reducing pollution and increasing specific impulse

Inactive Publication Date: 2011-04-20
深圳巡天空间技术有限公司
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a space vehicle with no pollution to the optical mirror surface, simple working medium supply mode, high specific impulse and total impulse, aiming at the problems of optical pollution and substrate material waste in reflection mode laser micro thrusters. , long working life, compact structure, safe and reliable reflection mode laser micro thruster

Method used

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Embodiment Construction

[0020] See attached Figure 1~3 , The laser and the beam conversion device 1 generate laser light with a wavelength of 1064nm, the pulse width is below microseconds, and the energy of each pulse is several millijoules. The beam diameter of the expanded laser beam is about 30mm, and its optical axis coincides with the central axis of the thruster. The parabolic mirror of revolution 2 is made of optical glass through coating, and the average thickness of the glass is about 1mm. The annular mirror 3 is formed by rotating a line segment with an inclination angle of about 38.465 degrees around the central axis for 360 degrees, which can focus the laser light on one point, and its material is the same as that of the rotating body parabolic mirror 2 . The slit on the slit nozzle 10 allows the laser to pass through, and its width is about 5mm. The operating time of the shutter 8 is less than 50 μs. The energetic working medium 12 is composed of ammonium nitrate composite propellant...

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Abstract

The invention relates to a laser microthruster which comprises a rotator parabolic reflecting mirror (2), an annular reflecting mirror (3), a jet pipe (10) with a slit, a shutter (8) for preventing optical mirror faces from being polluted, and an anti-pollution transparent glass loop (9), wherein the symmetry axis of the rotator parabolic reflecting mirror (2), the annular reflecting mirror (3) and the jet pipe (10) with a slit coincides with the central axis of the laser microthruster. The invention reduces the pollution of optical devices of a reflection-type laser thruster, and can effectively increase the specific impulse; the mass of the ablated working medium per impulse and the magnitude of the impulse of the thruster can be accurately controlled; and a flame-retardant film can be ablated by the laser or used for generating partial thrust.

Description

technical field [0001] The invention relates to a propulsion system for space vehicles such as satellites and probes. In particular, it is a laser micro-propulsion device that uses laser energy to ablate working fluid to generate high-speed plasma jets. Background technique [0002] The laser micro thruster has the advantages of high specific impulse, wide impulse range and small minimum impulse bit, which can meet the requirements of precise attitude control and orbital maneuvering of satellites. Laser micro thrusters generally include solid-state lasers, solid or liquid working fluids for ablation, optical focusing systems and other control actuators. According to the interaction mode between laser and working medium, it can be divided into transmission mode and reflection mode. [0003] The working medium used in the transmission mode laser micro thruster is a solid double-layer structure. The upper layer is ablative material for generating thrust; the lower layer is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03H1/00
Inventor 何振吴建军张代贤张锐刘泽军晏政
Owner 深圳巡天空间技术有限公司
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