CN104777486A - Handheld laser short-distance measurement instrument - Google Patents
Handheld laser short-distance measurement instrument Download PDFInfo
- Publication number
- CN104777486A CN104777486A CN201510058049.7A CN201510058049A CN104777486A CN 104777486 A CN104777486 A CN 104777486A CN 201510058049 A CN201510058049 A CN 201510058049A CN 104777486 A CN104777486 A CN 104777486A
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- China
- Prior art keywords
- light
- laser
- receiving end
- polarization
- optoelectronic components
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
Abstract
The invention relates to the technical field of photoelectricity, in particular to a handheld laser short-distance measurement instrument. The handheld laser short-distance measurement instrument comprises a laser distance measurement instrument main body, wherein the laser distance measurement instrument main body comprises a measurement optical system; the measurement optical system comprises a laser emitter; a first polarizing beam-splitting plate used for transmitting P light and filtering S light is arranged at the emission end of the laser emitter; polarized light emitted by the first polarizing beam-splitting plate faces to a polarizing beam-splitting mirror, a reflective direction of the polarizing beam-splitting mirror faces to a light outlet, and a light-emitting direction of the light outlet faces to a target object; a second polarizing beam-splitting plate used for transmitting P light and filtering S light is arranged behind the polarizing beam-splitting mirror; a receiving-end photoelectric part is arranged behind the second polarizing beam-splitting plate; the light outlet, the polarizing beam-splitting mirror, the second polarizing beam-splitting plate and the receiving-end photoelectric part are arranged in sequence from front to rear; a connecting line of the light outlet and the receiving-end photoelectric part forms an included angle of 45 degrees with the reflective surface of the polarizing beam-splitting mirror. The handheld laser short-distance measurement instrument has the characteristics that the short-distance target object is measured more accurately, errors are smaller, the operation is convenient, and a serious nonlinear problem caused by diffuse reflection of the target object is solved.
Description
Technical field
The present invention relates to field of photoelectric technology, particularly relate to laser range finder.
Background technology
Hand-held laser rangefinder utilizes laser to carry out the instrument of Accurate Determining to the distance of target.Laser range finder is operationally to a branch of very thin laser range finder light of target injection, and the laser beam reflected by photovalve receiving target, timer measures laser beam from the time being transmitted into reception, calculates from observer's range-to-go.Con-ventional handheld laser range finder many employings off-axis optical system receives laser reflection echo, outside object appears at comparatively remote (being greater than 10 meters), light echo is directional light substantially, focus on photoelectricity avalanche diode (APD) by aspheric surface receiver lens, wherein the light-sensitive surface of APD is diameter 0.23 millimeter (see accompanying drawing 1).But because system focal length is immutable, so when stadia surveying closely (especially 2 ~ 5 meters) target time, then there will be following problem: the hot spot of Laser emission directly can not be received (see accompanying drawing 2) by APD, and freely reflect by light, can bring comparatively serious non-linear, so need auxiliary optical path design that APD just can be made to receive good flashlight.
Summary of the invention
The object of the present invention is to provide Handheld laser closely stadimeter, to solve at least one technical matters above-mentioned.
Technical matters solved by the invention can realize by the following technical solutions:
Handheld laser is stadimeter closely, comprise a laser range finder main body, described laser ranging main body comprises a measurement optical system, it is characterized in that, described measurement optical system comprises a generating laser, and the transmitting terminal of described generating laser is provided with the first polarization spectro sheet of P light filter S light;
The polarized light of the transmitting of described first polarization spectro sheet towards a polarization spectroscope, the reflection direction of described polarization spectroscope towards a light-emitting window, the light emission direction head for target thing of described light-emitting window;
Described polarization spectroscope rear is provided with the second polarization spectro sheet of P light filter S light, described second polarization spectro sheet rear is provided with receiving end optoelectronic components, arrange successively before and after described light-emitting window, described polarization spectroscope, described second polarization spectro sheet, described receiving end optoelectronic components, the line of described light-emitting window and described receiving end optoelectronic components and the reflective surface of described polarization spectroscope are 45 ° of angles.
Present invention optimizes the light channel structure of conventional laser stadimeter, make the reception that the hot spot receiving end optoelectronic components of Laser emission is good.The present invention is compared to con-ventional handheld laser range finder, and measure close-in target thing more accurate, error is less, easy to operate, what solve that target object diffuse reflection brings is serious non-linear simultaneously, nor affects the stability of distance reception light, and distance is all suitable.This programme solves the contradiction between ranging far away and little blind range at all.
The polarization spectro sheet that two saturating P filter S has been used in the present invention, be respectively the first polarization spectro sheet, the second polarization spectro sheet, a polarization spectroscope (PBS), its principle is as the incident PBS of polarized light, the S polarized light (polarization direction vertical incidence line) that PBS can reflect the incident light, and allow P polarized light (the parallel incident ray in polarization direction) pass through.First, laser transmitter projects laser is through the first polarization spectro sheet, filter S light, through p light, then through polarization spectroscope PBS, 45 degree of deviations occur, deviation illumination is mapped on measured object (unrestrained launching objects), launch, the part light reflected through polarization spectroscope PBS transmission, incides on receiving end optoelectronic components through the second polaroid along light path again, receiving end optoelectronic components receives stable laser facula signal thus.
Described measurement optical system comprises collimating lens, and described collimation lens is between described light-emitting window and described polarization spectroscope.
Deviation light by being provided with collimation lens, thus is gone out directional light to object through collimation lens collimated emission by the present invention, thus improves the detection to object distance.
Described receiving end optoelectronic components is photoelectricity avalanche diode.
Described laser range finder main body also comprises a control system, described control system connects a timer, described control system connects described generating laser, control described laser transmitter projects laser beam, and timer described in synchro control carries out timing by described control system;
Described control system also connects described receiving end optoelectronic components, after described receiving end optoelectronic components receives photosignal, gives described control system one feedback signal, and after described control system obtains feedback signal, described timer stops timing;
The control system of described laser range finder main body measures laser beam from the time being transmitted into reception by described timer, calculates the distance from observer to object.
Described receiving end optoelectronic components is ccd sensor or cmos sensor, and the sensing direction of described receiving end optoelectronic components is towards a phtographic lens;
Be provided with a microprocessor system in described control system, described receiving end optoelectronic components connects described microprocessor system, and described microprocessor system is provided with an image capturing and processing circuit.
The present invention is by being transmitted on object by generating laser through optics, be reflected back receiving end optoelectronic components, in the surface imaging of receiving end optoelectronic components, pick-up lens gathers multiple spot light spot image, realize opto-electronic conversion, output image data is transferred to image capturing and processing circuit, and image acquisition and processing module according to the size of the hot spot collected, thus calculates the position apart of object.The present invention by spot size with measure laser beam and synchronously carry out from the time two-way metering system being transmitted into reception, thus improve the estimating precision of adjusting the distance.
Described receiving end optoelectronic components is ccd sensor, described measurement optical system also comprises a CCD drive plate, described ccd sensor receives the intensity signal of outgoing beam, the intensity signal on described CCD drive plate record ccd sensor, and sends microprocessor system to and store.Ccd sensor volume is little, quality is light, power consumption is little, stable performance, life-span are long, and the corresponding speed as optical measuring device is fast, pattern distortion is little, without distinguishing features such as image retentions.
Described laser range finder main body comprises a housing, and described housing is provided with a through hole, is described light-emitting window with described through hole;
Described polarization spectroscope, described first polarization spectro sheet, described second polarization spectro sheet, described receiving end optoelectronic components, described generating laser are all positioned at described housing;
Described housing is provided with one for the display screen of display measurement numerical value, and described display screen connects described control system.
As a kind of preferred version, the light emission direction of described generating laser upward, described first polarization spectro sheet is provided with directly over the Z-axis of described generating laser, the top of described first polarization spectro sheet is provided with described polarization spectroscope, the coaxial front of level of described polarization spectroscope is provided with collimation lens, the light emission direction head for target thing of described collimation lens, rear on the transverse axis of described polarization spectroscope is provided with described second polarization spectro sheet, and the rear of described second polarization spectro sheet is receiving end optoelectronic components.
The outer wall longitudinal section of described housing is T-shaped, is provided with a hollow cavity in described housing, and the longitudinal section of described hollow cavity is T-shaped, and the length of described housing upper end is greater than the length of described housing lower end;
The upper end that described polarization spectroscope, described second polarization spectro sheet, described receiving end optoelectronic components are positioned at described housing is inner, and the lower end that described first polarization spectro sheet, described generating laser are all positioned at described housing is inner.
The present invention by optimizing the structure of housing, thus reduces the volume of housing, and by T-type structure, is convenient to user and is held.
The lower end outer wall of described housing is provided with a switch, and described switch connects described control system.By opening described switch, what control each range finding parts by control system carries out work.
Accompanying drawing explanation
Fig. 1 is object when appearing at more remote, the index path of con-ventional handheld laser range finder;
Fig. 2 be object below 10 meters during distance, the index path of con-ventional handheld laser range finder;
Fig. 3 is the inner one-piece construction figure of the present invention.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, setting forth the present invention further below in conjunction with concrete diagram.
With reference to Fig. 3, Handheld laser is stadimeter closely, comprises a laser range finder main body, and laser ranging main body comprises a measurement optical system, measure optical system and comprise a generating laser 1, the transmitting terminal of generating laser 1 is provided with the first polarization spectro sheet 2 of P light filter S light; The polarized light of the transmitting of the first polarization spectro sheet 2 towards a polarization spectroscope 3, the reflection direction of polarization spectroscope 3 towards a light-emitting window, the light emission direction head for target thing 6 of light-emitting window; Polarization spectroscope 3 rear is provided with the second polarization spectro sheet 4 of P light filter S light, second polarization spectro sheet 4 rear is provided with receiving end optoelectronic components 5, arrange successively before and after light-emitting window, polarization spectroscope 3, second polarization spectro sheet 4, receiving end optoelectronic components 5, the line of light-emitting window and receiving end optoelectronic components 5 and the reflective surface of polarization spectroscope 3 are 45 ° of angles.Present invention optimizes the light channel structure of conventional laser stadimeter, make the reception that the hot spot receiving end optoelectronic components 5 of Laser emission is good.The present invention is compared to con-ventional handheld laser range finder, and measure close-in target thing 6 more accurate, error is less, easy to operate, what solve that the diffuse reflection of object 6 body brings is serious non-linear simultaneously, nor affects the stability of distance reception light, and distance is all suitable.This programme solves the contradiction between ranging far away and little blind range at all.The polarization spectro sheet that two saturating P filter S has been used in the present invention, be respectively the first polarization spectro sheet 2, second polarization spectro sheet 4, a polarization spectroscope 3 (PBS), its principle is as the incident PBS of polarized light, the S polarized light (polarization direction vertical incidence line) that PBS can reflect the incident light, and allow P polarized light (the parallel incident ray in polarization direction) pass through.First, generating laser 1 Emission Lasers is through the first polarization spectro sheet 2, filter S light, through p light, then through polarization spectroscope 3PBS, 45 degree of deviations occur, deviation illumination is mapped on measured object (unrestrained launching objects), launch, the part light reflected through polarization spectroscope 3PBS transmission, incides on receiving end optoelectronic components 5 through the second polaroid along light path again, receiving end optoelectronic components 5 receives stable laser facula signal thus.
Measure optical system and comprise collimating lens 7, collimation lens 7 is between light-emitting window and polarization spectroscope 3.Deviation light by being provided with collimation lens 7, thus is gone out directional light to object 6 through collimation lens 7 collimated emission by the present invention, thus improves the detection to object 6 distance.
Receiving end optoelectronic components 5 is photoelectricity avalanche diodes.Laser range finder main body also comprises a control system, and control system connects a timer, and control system connects generating laser 1, control generating laser 1 Emission Lasers bundle, and synchro control timer carries out timing by control system; Control system also connects receiving end optoelectronic components 5, after receiving end optoelectronic components 5 receives photosignal, gives control system one feedback signal, and after control system obtains feedback signal, timer stops timing; The control system of laser range finder main body measures laser beam from the time being transmitted into reception by timer, calculates the distance of from observer to object 6.
Receiving end optoelectronic components 5 is ccd sensor or cmos sensor, and the sensing direction of receiving end optoelectronic components 5 is towards a phtographic lens; Be provided with a microprocessor system in control system, receiving end optoelectronic components 5 connects microprocessor system, and microprocessor system is provided with an image capturing and processing circuit.The present invention is by being transmitted on object 6 by generating laser 1 through optics, be reflected back receiving end optoelectronic components 5, in the surperficial imaging of receiving end optoelectronic components 5, pick-up lens gathers multiple spot light spot image, realize opto-electronic conversion, output image data is transferred to image capturing and processing circuit, and image acquisition and processing module according to the size of the hot spot collected, thus calculates the position apart of object 6.The present invention by spot size with measure laser beam and synchronously carry out from the time two-way metering system being transmitted into reception, thus improve the estimating precision of adjusting the distance.
Receiving end optoelectronic components 5 is ccd sensors, and measure optical system and also comprise a CCD drive plate, ccd sensor receives the intensity signal of outgoing beam, the intensity signal on CCD drive plate record ccd sensor, and sends microprocessor system to and store.Ccd sensor volume is little, quality is light, power consumption is little, stable performance, life-span are long, and the corresponding speed as optical measuring device is fast, pattern distortion is little, without distinguishing features such as image retentions.
Laser range finder main body comprises a housing, and housing is provided with a through hole, take through hole as light-emitting window; Polarization spectroscope 3, first polarization spectro sheet 2, second polarization spectro sheet 4, receiving end optoelectronic components 5, generating laser 1 are all positioned at housing; Housing is provided with one for the display screen of display measurement numerical value, display screen connection control system.
As a kind of preferred version, the light emission direction of generating laser 1 upward, the first polarization spectro sheet 2 is provided with directly over the Z-axis of generating laser 1, the top of the first polarization spectro sheet 2 is provided with polarization spectroscope 3, the coaxial front of level of polarization spectroscope 3 is provided with collimation lens 7, the light emission direction head for target thing 6 of collimation lens 7, the rear that the rear on the transverse axis of polarization spectroscope 3 is provided with the second polarization spectro sheet 4, second polarization spectro sheet 4 is receiving end optoelectronic components 5.The outer wall longitudinal section of housing is T-shaped, is provided with a hollow cavity in housing, and the longitudinal section of hollow cavity is T-shaped, and the length of housing upper end is greater than the length of housing lower end; The upper end that polarization spectroscope 3, second polarization spectro sheet 4, receiving end optoelectronic components 5 are positioned at housing is inner, and the lower end that the first polarization spectro sheet 2, generating laser 1 are all positioned at housing is inner.The present invention by optimizing the structure of housing, thus reduces the volume of housing, and by T-type structure, is convenient to user and is held.
The lower end outer wall of housing is provided with a switch, switch connection control system.By opening switch, what control each range finding parts by control system carries out work.
Housing is provided with Handheld Division, and Handheld Division is provided with a flexible rubber layer, is provided with a piezoceramic material layer in rubber layer, and the electric energy output end of piezoceramic material layer connects an accumulating system, accumulating system connection control system.The electricity needed for control system work is given by piezoceramic material layer.By being provided with flexible rubber layer outside piezoceramic material layer; play outside the protection to piezoceramic material layer; can also improve the power storage of piezoceramic material layer, flexible rubber layer is subject to the grip of human body, and the elastic force via rubber layer is passed on piezoceramic material layer.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (10)
1. Handheld laser closely stadimeter, comprise a laser range finder main body, described laser ranging main body comprises a measurement optical system, it is characterized in that, described measurement optical system comprises a generating laser, and the transmitting terminal of described generating laser is provided with the first polarization spectro sheet of P light filter S light;
The polarized light of the transmitting of described first polarization spectro sheet towards a polarization spectroscope, the reflection direction of described polarization spectroscope towards a light-emitting window, the light emission direction head for target thing of described light-emitting window;
Described polarization spectroscope rear is provided with the second polarization spectro sheet of P light filter S light, described second polarization spectro sheet rear is provided with receiving end optoelectronic components, arrange successively before and after described light-emitting window, described polarization spectroscope, described second polarization spectro sheet, described receiving end optoelectronic components, the line of described light-emitting window and described receiving end optoelectronic components and the reflective surface of described polarization spectroscope are 45 ° of angles.
2. Handheld laser according to claim 1 closely stadimeter, is characterized in that, described measurement optical system comprises collimating lens, and described collimation lens is between described light-emitting window and described polarization spectroscope.
3. Handheld laser according to claim 1 closely stadimeter, it is characterized in that, described laser range finder main body also comprises a control system, described control system connects a timer, described control system connects described generating laser, control described laser transmitter projects laser beam by described control system, and timer described in synchro control carries out timing;
Described control system also connects described receiving end optoelectronic components, after described receiving end optoelectronic components receives photosignal, gives described control system one feedback signal, and after described control system obtains feedback signal, described timer stops timing;
The control system of described laser range finder main body measures laser beam from the time being transmitted into reception by described timer, calculates the distance from observer to object.
4. Handheld laser according to claim 3 closely stadimeter, is characterized in that, described receiving end optoelectronic components is photoelectricity avalanche diode.
5. Handheld laser according to claim 3 closely stadimeter, is characterized in that, described receiving end optoelectronic components is ccd sensor or cmos sensor, and the sensing direction of described receiving end optoelectronic components is towards a phtographic lens;
Be provided with a microprocessor system in described control system, described receiving end optoelectronic components connects described microprocessor system, and described microprocessor system is provided with an image capturing and processing circuit.
6. Handheld laser according to claim 5 closely stadimeter, it is characterized in that, described receiving end optoelectronic components is ccd sensor, described measurement optical system also comprises a CCD drive plate, described ccd sensor receives the intensity signal of outgoing beam, intensity signal on described CCD drive plate record ccd sensor, and send microprocessor system to and store.
7. Handheld laser according to claim 3 closely stadimeter, is characterized in that, described laser range finder main body comprises a housing, and described housing is provided with a through hole, is described light-emitting window with described through hole;
Described polarization spectroscope, described first polarization spectro sheet, described second polarization spectro sheet, described receiving end optoelectronic components, described generating laser are all positioned at described housing;
Described housing is provided with one for the display screen of display measurement numerical value, and described display screen connects described control system.
8. Handheld laser according to claim 7 closely stadimeter, it is characterized in that, the light emission direction of described generating laser upward, described first polarization spectro sheet is provided with directly over the Z-axis of described generating laser, the top of described first polarization spectro sheet is provided with described polarization spectroscope, the coaxial front of level of described polarization spectroscope is provided with collimation lens, the light emission direction head for target thing of described collimation lens, rear on the transverse axis of described polarization spectroscope is provided with described second polarization spectro sheet, the rear of described second polarization spectro sheet is receiving end optoelectronic components.
9. Handheld laser according to claim 8 closely stadimeter, it is characterized in that, the outer wall longitudinal section of described housing is T-shaped, is provided with a hollow cavity in described housing, the longitudinal section of described hollow cavity is T-shaped, and the length of described housing upper end is greater than the length of described housing lower end;
The upper end that described polarization spectroscope, described second polarization spectro sheet, described receiving end optoelectronic components are positioned at described housing is inner, and the lower end that described first polarization spectro sheet, described generating laser are all positioned at described housing is inner.
10. Handheld laser according to claim 9 closely stadimeter, is characterized in that, the lower end outer wall of described housing is provided with a switch, and described switch connects described control system.
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| CN201510058049.7A CN104777486A (en) | 2015-02-04 | 2015-02-04 | Handheld laser short-distance measurement instrument |
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| CN201510058049.7A CN104777486A (en) | 2015-02-04 | 2015-02-04 | Handheld laser short-distance measurement instrument |
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| CN106199991A (en) * | 2015-09-18 | 2016-12-07 | 王治霞 | Light splitting piece and the coaxial diastimeter of laser thereof and application |
| CN106501814A (en) * | 2016-12-09 | 2017-03-15 | 河南双汇投资发展股份有限公司 | A kind of amount of laser light fat instrument |
| CN107367736A (en) * | 2017-08-14 | 2017-11-21 | 杭州欧镭激光技术有限公司 | A kind of high-rate laser range unit |
| US20190170866A1 (en) * | 2017-12-05 | 2019-06-06 | Sharp Kabushiki Kaisha | Photoreceptor, flight time measurement device, and optical radar |
| CN110100159A (en) * | 2016-12-03 | 2019-08-06 | 伟摩有限责任公司 | The waveguide diffusing globe of light detection is carried out using aperture |
| CN111712734A (en) * | 2018-12-29 | 2020-09-25 | 深圳市大疆创新科技有限公司 | Laser ranging device and mobile platform |
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| CN107367736B (en) * | 2017-08-14 | 2024-01-19 | 杭州欧镭激光技术有限公司 | High-speed laser range unit |
| US20190170866A1 (en) * | 2017-12-05 | 2019-06-06 | Sharp Kabushiki Kaisha | Photoreceptor, flight time measurement device, and optical radar |
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| CN110018488B (en) * | 2017-12-05 | 2023-08-29 | 夏普株式会社 | Light receiving element, time-of-flight measurement device, and optical radar device |
| CN111712734A (en) * | 2018-12-29 | 2020-09-25 | 深圳市大疆创新科技有限公司 | Laser ranging device and mobile platform |
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Application publication date: 20150715 |
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