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Picosecond-pulse-based high-precision laser distance measuring device

A picosecond pulse and laser ranging technology, applied in the field of laser measurement, can solve the problems of long distance and high precision, and achieve the effect of ingenious structure design, high power density and high ranging accuracy

Inactive Publication Date: 2012-01-18
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that the distance and high precision of the existing ranging technology are difficult to balance, the present invention provides a high-precision laser ranging device based on picosecond pulses. The high precision refers to the distance target tens of kilometers away Perform measurements with an accuracy of 1 mm

Method used

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  • Picosecond-pulse-based high-precision laser distance measuring device

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Embodiment 1

[0036] Embodiment 1 In the high-precision laser ranging device based on picosecond pulses of the present invention, the high precision means that the measurement accuracy of a distance target tens of kilometers away reaches 1 mm;

[0037] The described high-precision laser ranging device based on picosecond pulses comprises a laser 1, a beam splitter I 2, a beam splitter II3, a telescope 4, a photoelectric converter I 5, a photoelectric converter II6, a delayer 7, Timer 8, interface converter 9, display 10, controller 11 and computer 12; Wherein, laser 1 is connected with beam splitter I 2, beam splitter II3, telescope 4 successively on the optical axis of its output beam;

[0038] Photoelectric converter I 5 is connected with beam splitter I 2 and delayer 7 respectively, and delayer 7 is connected with timer 8 and computer 12 respectively; Beam splitter II3 is connected with photoelectric converter II6; Photoelectric converter II6 is connected with timing Timer 8 is connected...

Embodiment 2

[0062] Embodiment 2 is a high-precision laser ranging device based on picosecond pulses. Laser 1 uses a Nd:YAG picosecond pulse laser with a wavelength of 266nm; the rest is the same as in Embodiment 1.

Embodiment 3

[0063] Embodiment 3 is a high-precision laser ranging device based on picosecond pulses. Laser 1 uses a Nd:YAG picosecond pulse laser with a wavelength of 355 nm; the rest are the same as in Embodiment 1.

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Abstract

The invention provides a picoseconds-pulse-based high-precision laser distance measuring device. The device combines a picosecond pulse laser technology and a high-speed photoelectric detection technology, and adopts a picosecond pulse laser as a laser emission source and a high-speed PIN photoelectric detector as a receiving unit. A laser light source works in a pulse mode, so the laser transmission power density is high, and consideration is given to the advantages of long measuring distance and high distance measuring precision. The overall device is stable and reliable; the precision for measuring a target away from dozens of kilometers reaches 1 millimeter; and the distance measurement precision is improved by 1,000 times compared with a conventional nanosecond pulse laser distance measuring technology. The device has an ingenious structure design, is simple and practical, and can be used for high-precision measurement of aeronautics and astronautics, marine survey and long distance.

Description

technical field [0001] The invention relates to a high-precision laser ranging device based on picosecond pulses, belonging to the technical field of laser measurement. Background technique [0002] Laser ranging technology is the earliest and most mature one in laser technology. The traditional laser ranging system has the problem of difficult balance between measurement accuracy and measurement distance. Among them, phase-modulated laser ranging and nanosecond pulse laser measuring The distance system is most commonly used. [0003] The phase-modulated laser ranging technology is to measure the phase difference between the continuous modulated laser and the back-and-forth on the distance d to be measured. To indirectly measure the distance information of the target. Because the phase of the light wave changes by 2π for every distance of λ during the propagation process, the distance d and the round-trip phase difference of the light wave There is a certain relationshi...

Claims

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Application Information

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IPC IPC(8): G01S17/10
Inventor 蔡红星高明希曹国华史国权吕琼莹李丽娟夏腾任玉郭沫然
Owner CHANGCHUN UNIV OF SCI & TECH
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