CN2872301Y - Optical distance measuring unit - Google Patents
Optical distance measuring unit Download PDFInfo
- Publication number
- CN2872301Y CN2872301Y CN 200520074633 CN200520074633U CN2872301Y CN 2872301 Y CN2872301 Y CN 2872301Y CN 200520074633 CN200520074633 CN 200520074633 CN 200520074633 U CN200520074633 U CN 200520074633U CN 2872301 Y CN2872301 Y CN 2872301Y
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- light
- group
- optical
- catoptron
- measurement apparatus
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Abstract
This utility model provides an optical ranging device having advantages of simple structure, easy manufacturing, wide measuring range, which comprises an illuminant of measuring light, a or a group of collimation field lens, a group of reflectors receiving the reflected measuring light reflected from the tested material, a optical receiver receiving the reflected measuring light and outputting a corresponding electrical signal, a control loop, which is electrically connected to the optical receiver and the illuminant, and receives and disposes the electrical signal output by the optical receiver to determine the tested distance; wherein, the control loop further includes a modulation loop to modulate the illuminant, the group of reflectors and the collimation field lens has a shared optical axis. By this structure, the measuring light reflected from no matter a distant tested material or a close range tested material can always be focused on the shared optical axis through the group of reflectors, with no need for additional light deflection elements. Furthermore, because the utility model uses reflectors to receive the reflected measuring light, it reduces the dissipation of the reflected measuring light and extends the measuring range.
Description
Technical field
The utility model relates to a kind of optical distance measurement apparatus.
Background technology
Optical distance measurement apparatus is one of important tool of measuring distance.On September 29th, 1998, laid-open U.S. Patents US5815251 disclosed a kind of optical distance measuring equipment, this equipment sends measuring light to testee, and receiving the measuring light that reflects from testee, the difference of measuring then between the two determines that distance-measuring equipment is to the distance between the testee.In order to solve the problem that the imaging after by receiving objective of measuring light that closer object reflects departs from the receiving objective focus, US5815251 provides two kinds of solutions: a kind of scheme is to adopt physical construction to drive light receiving surface to move in the focussing plane of receiving objective; Another kind of scheme is that light receiving surface is fixed, before receiving objective or appropriate location afterwards add optical deflection element which, deflect on the light receiving surface in order to reflected light closely.
Yet above-mentioned two kinds of methods all make the inner structure of optical distance measurement apparatus become complicated to some extent, have increased manufacture difficulty.And because its receiving objective is lens, some is depleted the measuring light that reflects from testee by the process of this receiving objective, and this is totally unfavorable to telemeasurement.
Summary of the invention
The purpose of this utility model provide a kind of simple in structure, be easy to make, optical distance measurement apparatus that measurement range is wide.
For achieving the above object, optical distance measurement apparatus of the present utility model comprises a measuring light light source, one or the one group collimator objective that the measuring light that light source is sent collimates, the reflection measurement reflection of light mirror that one group of received reflects from testee, an optical receiver that receives this reflection measurement light and export corresponding electric signal, one and optical receiver and light source electrical connection, the electric signal that receives and handle optical receiver output is to determine the control loop of tested distance, this control loop also comprises a modulator loop that light source is modulated, and this group catoptron and collimator objective have a common optical axis.By this structure setting, no matter measuring light from remote testee still closely testee reflect, by can focusing on this common optical axis behind this group catoptron, and do not need to adopt additional light deflection element.And owing to adopt catoptron to receive reflection measurement light, reduced the loss of reflection measurement light, enlarged measurement range.
As an improvement of the present utility model, this optical receiver also comprises a light receiving surface that receives described reflection measurement light, and light receiving surface is positioned on the common optical axis.
As further improvement of the utility model, the light receiving surface of optical receiver is positioned on the focus of this group catoptron, thereby make the reflection measurement light that reflects from remote testee can directly focus on the light receiving surface of optical receiver, to guarantee that optical receiver always can receive abundant reflection measurement light in the telemeasurement process.For close-in measurement, after the reflection measurement light that the intensity that reflects from testee is enough passes through this group mirror reflects, focus on and be positioned on the common optical axis on afterwards any of this group reflector focal point, thereby make reflection measurement light have enough light to cover the light receiving surface of optical receiver all the time, thereby avoid mobile light receiving surface, simplified inner structure.
Description of drawings
Fig. 1 is the light path synoptic diagram of the optical distance measurement apparatus of a kind of first-selected embodiment of the utility model.
Embodiment
The light path of the optical distance measurement apparatus of a kind of first-selected embodiment of the present utility model as shown in Figure 1.The optical distance measurement apparatus of this first-selected embodiment comprises 12, one of measuring light light sources or one group of 14, one of collimator objective receives 16, one optical receivers 18 of mirror group, and a control loop (not shown).Control loop also comprises a modulator loop, and this modulator loop is modulated light source 12 and made it send the modulation measuring light.First-selected ground, light source 12 is the semiconductor laser diodes that can send visible light.Light source 12 is placed on the focus of collimator objective 14 first-selectedly, the measuring light 142 of its measuring light of sending 122 by becoming collimation behind the collimator objective.Receiving mirror group 16 is set at after light source 12 and the collimator objective 14.Receive mirror group 16 and further comprise one first reception mirror 162, and one second receives mirror 164.First receives what a Internal Spherical Surface catoptron of mirror 162.Second receives preferably spherical outside surface catoptron of mirror 164.First receives mirror 162, the second reception mirror 164 and collimator objective 14 has a common optical axis 20.Second receives mirror 164 has a center pit 163.
When the measuring light 142 of collimation shone on the remote testee, the reflection measurement light 144 that reflects from testee was the directional light that is parallel to common optical axis 20.Directional light 144 projects on the second reception mirror 164 after being received mirror 162 reflections by first, and receiving through second becomes light beam 166 and focus on a B after mirror 164 reflects once more.Significantly, some B is positioned on the common optical axis 20.Optical receiver 18 is set on the common optical axis 20, and its photosurface 182 is positioned at a B place.At this moment, the photosurface 182 of optical receiver 18 is the light receiving surface of optical receiver.Optical receiver can be that avalanche optoelectronic diode (APD), PIN photoelectric diode or other can be realized the appropriate device of opto-electronic conversion.Optical receiver 18 receives after the measuring light that reflects from testee, and the electric signal that output has comprised tested range information is accordingly handled this electric signal and calculated tested distance by control loop in control loop.In other embodiments, one section fibre-optic end face can be placed on a B and sentence reception reflection measurement light 166, its other end alignment light receiver, reflection measurement light is sent on the optical receiver in this way, and this moment, light transmitting fiber was placed on the light receiving surface of that end face at a B place as optical receiver.
As shown in phantom in Figure 1, led closely tested distance when last when measuring light 142 irradiation of collimation, the reflection measurement light 144 ' that reflects from testee is the diverging light with common optical axis 20 symmetries.Diverging light 144 ' is received by first to be become light beam 166 ' and focuses on a B ' after mirror 162 and second receives mirror 164 reflections.Point B ' is positioned on the common optical axis 20 and at a B rear.Though this moment, light beam 166 ' did not focus on the light receiving surface 182 of optical receiver 18, light beam 166 ' covers light receiving surface 182 all the time, and does not need additional other light deflection element.Because reflection measurement light is more intense during close-in measurement, a part of light in the light beam 166 ' of reflection measurement light just is enough to drive optical receiver 18 work, does not therefore also need mobile optical receiver 18 when close-in measurement.
The utility model is not limited to the description of above-mentioned first-selected embodiment.Those of ordinary skill in the art can with understand that easily under the prerequisite that does not break away from principle of the present utility model, the utility model also exists a lot of modifications and replacement scheme.Scope of the present utility model is determined by claim.
Claims (8)
1. optical distance measurement apparatus comprises:
A light source that sends measuring light;
One or one group makes the measuring light collimation that described light source sends and projects collimator objective on the testee;
The reflection measurement reflection of light mirror that one group of received reflects from described testee;
An optical receiver that receives described reflection measurement light and export corresponding electric signal;
An electric signal that is electrically connected, receives and handle described optical receiver output with described optical receiver and described light source is to determine the control loop of tested distance, and described control loop also comprises a modulator loop that described light source is modulated;
It is characterized in that: described one group of catoptron and described collimator objective have a common optical axis.
2. optical distance measurement apparatus as claimed in claim 1 is characterized in that: described optical receiver also comprises a light receiving surface that receives described reflection measurement light, and described light receiving surface is positioned on the described common optical axis.
3. optical distance measurement apparatus as claimed in claim 2 is characterized in that: the light receiving surface of described optical receiver is positioned on the focus of described one group of catoptron.
4. optical distance measurement apparatus as claimed in claim 1 is characterized in that: described light source is positioned on the focus of described collimator objective.
5. as the described optical distance measurement apparatus of above-mentioned arbitrary claim, it is characterized in that: described one group of catoptron comprises one first catoptron and one second catoptron.
6. optical distance measurement apparatus as claimed in claim 5 is characterized in that: described first catoptron has the spherical reflective surface of an indent.
7. optical distance measurement apparatus as claimed in claim 6 is characterized in that: described first catoptron has a center pit.
8. optical distance measurement apparatus as claimed in claim 5 is characterized in that: described second catoptron has the spherical reflective surface of an evagination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520074633 CN2872301Y (en) | 2005-08-18 | 2005-08-18 | Optical distance measuring unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520074633 CN2872301Y (en) | 2005-08-18 | 2005-08-18 | Optical distance measuring unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2872301Y true CN2872301Y (en) | 2007-02-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520074633 Expired - Fee Related CN2872301Y (en) | 2005-08-18 | 2005-08-18 | Optical distance measuring unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN2872301Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013013488A1 (en) * | 2011-07-22 | 2013-01-31 | 江苏徕兹光电科技有限公司 | Optical system structure of laser range finder |
| CN113124820A (en) * | 2021-06-17 | 2021-07-16 | 中国空气动力研究与发展中心低速空气动力研究所 | Monocular distance measurement method based on curved mirror |
| CN113124821A (en) * | 2021-06-17 | 2021-07-16 | 中国空气动力研究与发展中心低速空气动力研究所 | Structure measurement method based on curved mirror and plane mirror |
-
2005
- 2005-08-18 CN CN 200520074633 patent/CN2872301Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013013488A1 (en) * | 2011-07-22 | 2013-01-31 | 江苏徕兹光电科技有限公司 | Optical system structure of laser range finder |
| CN113124820A (en) * | 2021-06-17 | 2021-07-16 | 中国空气动力研究与发展中心低速空气动力研究所 | Monocular distance measurement method based on curved mirror |
| CN113124821A (en) * | 2021-06-17 | 2021-07-16 | 中国空气动力研究与发展中心低速空气动力研究所 | Structure measurement method based on curved mirror and plane mirror |
| CN113124821B (en) * | 2021-06-17 | 2021-09-10 | 中国空气动力研究与发展中心低速空气动力研究所 | Structure measurement method based on curved mirror and plane mirror |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070221 Termination date: 20130818 |