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Mixing apparatus and distance measuring apparatus using same

A light mixing device and distance measuring device technology, which is applied in the field of light mixing devices and distance measuring devices, can solve the problems of high noise and large power consumption, and achieve the effect of high-speed light mixing and noise

Inactive Publication Date: 2008-10-08
KK TOPCON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in this existing light mixing device, the drive motor rotates the phase plate to mix the laser beams to eliminate uneven light emission, so it is difficult to mix light at high speed, and the power consumption is large and the noise is large.

Method used

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  • Mixing apparatus and distance measuring apparatus using same
  • Mixing apparatus and distance measuring apparatus using same
  • Mixing apparatus and distance measuring apparatus using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] based on figure 1 The distance measuring device 100 using modulated light will now be described.

[0029] The frequency divider 10 of the distance measuring device 100 divides the frequency of the 15MHz signal from the oscillator 11 to generate two signals of 75KHz and 3KHz.

[0030] The synthesizer 13 generates a 14.997 MHz signal which is the difference between the 15 MHz signal from the oscillator 11 and the 3 KHz signal from the frequency divider 10 and a 72 KHz signal which is 24 times the 3 KHz signal from the frequency divider 10 .

[0031] The first switcher 14 outputs one of 15MHz or 75KHz signals according to the signal 16 from the processing control circuit 15, and the processing control circuit 15 is equivalent to an arithmetic processing unit.

[0032] The light mixing device has a collimating lens 26, a reflective swing device 25 and an optical fiber 28 for light mixing. The front end of the optical fiber is processed as input end 28a or output end 28b. ...

Embodiment 2

[0059] Figure 5 It is an optical diagram showing main parts of Example 2 using modulated light. in the Figure 5 In , the same symbols are attached to the same components as those in Example 1, and detailed description thereof will be omitted, and the different parts will be mainly described.

[0060] The light mixing device is composed of a combination of a first reflective oscillating device 25' for disturbing the laser beam and a second reflective oscillating device 25" as an optical switch for selectively switching the reflection direction of the laser beam.

[0061] The distance measuring device emits a laser beam as measurement light, receives and detects the reflected light from the measurement object, and measures the distance. Including a prism-type distance-measuring device using a reflective prism 34 as its measurement object, a prism-less type distance-measuring device in which the measurement object is a natural object or an artificial object without using a re...

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PUM

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Abstract

To mix a laser beam (PO) from a laser light source (18), the laser beam (PO) is permitted to enter from one end plane of an optical fiber (24), and the laser beam is outputted from the other end plane of the optical fiber (24). Then, a laser beam (P1) outputted from the other end plane of the optical fiber (24) is permitted to enter from one end plane of an optical fiber (28), and is outputted from the other end plane of the optical fiber (28). A swinging microelectromechanical system (27) having a mirror plate (27a) is arranged between the other end plane of the optical fiber (24) and the one end plane of the optical fiber (28), and a laser beam (P4) is shifted to mix the laser beam by swinging the mirror plate (27a).

Description

technical field [0001] The invention relates to a light mixing device for a laser light source and a distance measuring device using the light mixing device. Background technique [0002] Conventionally, distance measuring devices that use laser beams have a narrow wavelength band of light, and the light used is prone to interference and errors due to uneven emission of light emitted from the device. Therefore, it can be said that it is difficult to use laser beams. The distance measuring device performs high-precision long-distance measurement. [0003] Therefore, in order to reduce uneven light emission, a distance measuring device has been proposed that guides a laser beam to an optical fiber and mixes light. However, in order to eliminate uneven light emission of the laser beam, the length of the fiber must be extended, resulting in an increase in the size of the entire device. [0004] Therefore, in order to eliminate this disadvantage, a device comprising a phase plat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/36G01S7/481G02B26/08
CPCG02B6/3516G02B27/0977G02B6/3558G02B27/0944G02B26/0841G01S17/325G02B6/357G01S7/4818G02B27/0933G02B6/3594G01S17/34
Inventor 川岛浩幸藤野诚后藤义明中西美智子丸山弘毅小林亮夫
Owner KK TOPCON