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Light splitting slice, laser coaxial range finder and application thereof

A technology of spectrometer and rangefinder, which is applied in optics, instruments, measuring devices, etc., can solve the problems that the detection is difficult to achieve the ideal effect, and achieve the effects of overcoming detection blind spots, high detection signal-to-noise ratio, and low manufacturing cost

Inactive Publication Date: 2015-12-02
王治霞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In many cases, due to the diversity of targets, the distribution area of ​​the illumination light and signal light in the beam splitter is different. Although the hollowing out method takes advantage of this feature, the binary nature of the illumination area makes this method difficult for many detections. to achieve the desired effect

Method used

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  • Light splitting slice, laser coaxial range finder and application thereof
  • Light splitting slice, laser coaxial range finder and application thereof
  • Light splitting slice, laser coaxial range finder and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Such as figure 1 and figure 2 As shown, a beam splitter includes a beam splitter, the beam splitter body 31 has a first area B for reflection and a second area A for light transmission and reflection, and the first area B is a reflection area , the second area A is a transflective area or a polarization splitting area. When in use, the beam emitted by the beam source is irradiated to the target through the second area, and the reflected light of the target is passed through the second area A and the first Area B reflection.

[0045] Such as figure 1 As shown, in this example, the second area A is located in the middle area of ​​the light splitter body 31, and the first area B is located in the outer area of ​​the light splitter body 31; the middle here represents the center of the light splitter body 31, and the outside represents the light splitter The area on the body 31 relative to the central periphery.

[0046] In general, due to the scattering of objects, the...

Embodiment 2

[0056] This example mainly takes the application of the beam splitter in the laser coaxial range finder as an example to describe in detail, such as Figure 7 As shown, a laser coaxial rangefinder includes a laser 1 and a detector 5, and also includes a second lens 2, a beam splitter 3 and a first lens 4 arranged in sequence along the optical axis of the laser 1, wherein the beam splitter 3 adopts In any structure of Embodiment 1, the beam splitter 3 is provided with a semi-transparent and semi-reflective area (or polarization splitting area) and a reflection area, and the light beam emitted by the laser 1 is focused into a thin beam by the second lens 2, and passes through the semi-transparent and semi-reflective area. The reflection area (or polarization splitting area) passes through the first lens 4 to form a parallel beam to irradiate the object 6 to be measured. The light beam reflected by the object 6 to be measured is collected by the first lens 4 and reflected from the...

Embodiment 3

[0063] Such as Figure 8 As shown, in this example, compared with Embodiment 2, the second lens 2 is removed, and the light emitted by the laser 1 is collected by the small hole diaphragm 7 of the shield and then shoots to the beam splitter 3. This structure can also solve the detection blind spot The problem. All the other structures and principles are the same as in Embodiment 2.

[0064] The arrangement of the present invention can be used for laser phase ranging instruments, and can also be used for laser pulse time ranging instruments. This coaxial method can not only realize the detection of long-distance and weakly reflective objects, but also effectively avoid the blind spot problem of specular reflective objects .

[0065] The spectroscopic sheet of the present invention can be applied to the field of optical measurement and observation. The spectroscopic sheet includes a semi-transparent and semi-reflective area and a reflection area. The reflected light is reflec...

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Abstract

The invention provides a light splitting slice and a laser coaxial range finder and application thereof. The laser coaxial range finder comprises a light beam source and comprises a second lens, the light splitting slice, and a first lens which are successively arranged along an optical axis direction. The light splitting slice is provided with a half reflection zone and a reflection zone. Light beams emitted from the light beam source pass the half reflection zone and the first lens to form parallel light beams to irradiate a target object. Light beams reflected by the target object are converged by the first lens and are reflected by the reflection zone and the half reflection zone to a measurement position or observation position. A light-slitting system can be used in a measurement system or observation system. The laser coaxial range finder solves a problem that laser reflected by an object leaks so as to cause a detection blind spot in a pitting method. The laser coaxial range finder improves a detection signal-to-noise ratio, and achieves coaxial measurement of common objects and coaxial measurement of far objects, weak-reflection objects, and mirror objects.

Description

technical field [0001] The invention relates to the technical field of optical measurement and observation, in particular to a beam splitter, a laser coaxial range finder and its application. Background technique [0002] Laser range finders have been widely used in industry, military, scientific research and other fields. General laser measuring instruments adopt the working method of separating the laser emitting optical axis and the laser receiving optical axis. And the signal-to-noise ratio of the measurement signal is low, and there are great measurement difficulties for both short-distance measurement and long-distance measurement. [0003] In order to solve the difficulty of separating the optical axis, the traditional method is to use the method of transmitting and receiving common apertures (coaxial method). About 50% of the emitted light energy passes through the light splitter to illuminate the object, and only 50% of the light energy returned from the object rea...

Claims

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Application Information

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IPC IPC(8): G02B27/10G02B27/28G01S17/08
CPCG01S7/481G01S17/08G02B27/10G02B27/283G02B27/28
Inventor 王治霞
Owner 王治霞
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