WO2022012031A1 - 双光源激光测距仪 - Google Patents

双光源激光测距仪 Download PDF

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Publication number
WO2022012031A1
WO2022012031A1 PCT/CN2021/074792 CN2021074792W WO2022012031A1 WO 2022012031 A1 WO2022012031 A1 WO 2022012031A1 CN 2021074792 W CN2021074792 W CN 2021074792W WO 2022012031 A1 WO2022012031 A1 WO 2022012031A1
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laser
module
emitted
laser module
wavelength
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PCT/CN2021/074792
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English (en)
French (fr)
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王振兴
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深圳市度彼电子有限公司
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Publication of WO2022012031A1 publication Critical patent/WO2022012031A1/zh

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    • 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

Definitions

  • the utility model relates to a laser ranging device, in particular to a dual-light source laser ranging device.
  • the laser rangefinder is an instrument that uses a certain parameter of the modulated laser to measure the distance to the target. According to the ranging method, it is divided into a pulsed rangefinder and a pulsed rangefinder.
  • the target emits a beam or a series of short-lived pulsed laser beams, and the photoelectric element receives the laser beam reflected by the target.
  • the timer measures the time from the laser beam emission to the reception, and calculates the distance from the observer to the target.
  • the phase method laser rangefinder detects the distance by detecting the phase difference between the emitted light and the reflected light when they propagate in space.
  • the laser rangefinder is light in weight, small in size, simple in operation, fast and accurate, and its error is only one fifth to several hundredths of other optical rangefinders.
  • the light sources of common laser rangefinders now generally use red light, infrared light, green light and so on.
  • infrared light has high receiving sensitivity relative to the receiving sensor, but is invisible to the human eye.
  • the human eye is highly sensitive to green light, but the sensitivity of the green light-receiving light sensor is much lower than that of red or infrared light.
  • the patent document with the patent number of 201420105329.X discloses a small green light distance meter, which includes a green light indicating system, and the green light indicating system includes a laser driving device, a semiconductor laser, a self-frequency doubling crystal, an emission lens, a laser
  • the driving device, the semiconductor laser, the self-frequency doubling crystal, and the transmitting lens are arranged in sequence to form a green light indicator system.
  • the indicator system is controlled by the indicator button. It also includes a ranging system.
  • the lens, the photoelectric conversion device, the control device, the display device and the green light indicating system together form the green light ranging system and are controlled by the ranging button.
  • it also includes a casing, a display device and a distance measuring button, the display buttons are arranged on the surface of the casing, and the others are arranged inside the casing.
  • the operation process is as follows: press the ranging button, the control device controls the laser driving device, generates a sinusoidal signal to drive the laser of the semiconductor laser, and the laser passes through the self-frequency doubling crystal to generate green.
  • Laser part of the green laser is emitted to the target through the emitting lens, and the laser light diffusely reflected by the target passes through the receiving lens and is converted into an electrical signal by a photoelectric conversion device.
  • the other part of the green laser is directly converted into an electrical signal by the photoelectric conversion device.
  • Signal 1 and electrical signal 2 are collected and processed by the control system, and displayed through the display device.
  • the control system device When used as a green light indicator system, press the indicator button, the control system device controls the laser drive device, and directly generates the driving current to drive the generation of the semiconductor laser laser.
  • the green light rangefinder combines green laser indication and green laser range finding functions, which can be used for both laser indication and laser range finding functions.
  • the inventors of the present invention have found that the above technical solutions have the following disadvantages: the positions of the measuring laser and the indicating laser are deviated.
  • the purpose of the utility model is to provide a laser rangefinder with better visibility for human eyes and higher sensor sensitivity.
  • the technical scheme adopted by the utility model is: a dual-light source laser range finder, comprising an optical bearing base, a receiving lens, a receiving photoelectric sensor, a laser emitting device and an optical measurement receiving device;
  • the laser emitting device includes at least one first A laser module and at least one second laser module; wherein, the first laser module is used for emitting a visible shorter wavelength laser, and the laser is used to indicate a measurement target; the second laser module is used for emitting A laser with a longer wavelength, which is used to measure distances;
  • the optical measurement receiving device includes at least one beam combiner (negative filter) and at least one measurement laser filter; wherein the beam combiner (negative filter) filter) is used to reflect the laser light emitted by the first laser module, and its reflection wavelength is consistent with the wavelength of the laser emitted by the first laser module; and, the beam combiner (negative filter) ) of the half bandwidth is not greater than the wavelength difference between the lasers emitted by the first laser module and the second laser module;
  • the measurement laser filter
  • both the first laser module and the second laser module include a bracket, a laser collimating lens and a laser, wherein the laser emission wavelength of the first laser module is 500NM-550NM or 620NM-690NM.
  • the range finder is provided with a housing, and a component for moving the bracket of the laser is arranged in the housing, and the bracket can move in two directions perpendicular to the optical axis of the laser emitting laser light. , such as moving up and down or left and right, the movement of the bracket drives the laser to move to calibrate the emitted light; in addition, the bracket can also move along the direction of the optical axis of the laser emitted by the laser, that is, move back and forth, so that by adjusting The support moves to adjust the direction of the laser light emitted by the laser.
  • the rangefinder is provided with a casing, and a component for moving the beam combiner (negative filter) is arranged in the casing, and by adjusting the beam combiner (negative filter) , adjust the direction of the laser emitted by the laser.
  • the laser light emitted by the first laser module passes through the negative filter
  • the laser light emitted by the second laser module passes through the beam combiner (negative filter)
  • two are combined into a laser beam.
  • the laser light emitted by the first laser module is at right angles to the laser light emitted by the second laser module.
  • the beam combiner (negative filter) forms an inner angle of 45 degrees with the laser beam emitted by the first laser module and the laser beam emitted by the second laser module.
  • the beneficial effect of the utility model is that: the utility model realizes better visibility for the human eye and higher sensitivity of the sensor through the design of double light sources.
  • Figure 1 is a schematic structural diagram of the utility model.
  • first”, “second” and “third” in the present invention are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as “first”, “second”, “third” may expressly or implicitly include at least one of that feature.
  • “plurality” means at least two, such as two, three, etc., unless otherwise expressly and specifically defined. All directional indications (such as up, down, left, right, front, rear%) in the embodiments of the present invention are only used to explain the relative positions of various components under a certain posture (as shown in the accompanying drawings). relationship, movement situation, etc., if the specific posture changes, the directional indication changes accordingly.
  • the terms “comprising” and “having” and any variations thereof are intended to cover non-exclusive inclusion.
  • a dual-light source laser range finder comprising an optical bearing base (3), a receiving lens (5), a receiving photoelectric sensor (8), a laser emitting device and an optical measurement receiving device, is characterized in that:
  • the laser emitting device comprises at least one first laser module (1) and at least one second laser module (2); wherein, the first laser module is used to emit a visible shorter wavelength laser, the laser used to indicate the measurement target; the second laser module is used to emit a longer wavelength laser, the laser is used to measure the distance;
  • the optical measurement receiving device comprises at least one beam combiner (4) (negative filter ) and at least one measuring laser filter (7); wherein, the beam combiner (negative filter) is used to reflect the laser light emitted by the first laser module, and its reflection wavelength is the same as that of the first laser light
  • the wavelengths of the lasers emitted by the module are consistent; and, the half bandwidth of the beam combiner (negative filter) is not greater than the wavelength difference between the lasers emitted by the first laser module and the second laser
  • both the first laser module and the second laser module include a bracket, a laser collimating lens and a laser, wherein the laser emission wavelength of the first laser module is 500NM-550NM or 620NM-690NM.
  • the range finder is provided with a housing, and a component for moving the bracket of the laser is arranged in the housing, and the bracket can move in two directions perpendicular to the optical axis of the laser emitting laser light. , such as moving up and down or left and right, the movement of the bracket drives the laser to move to calibrate the emitted light; in addition, the bracket can also move along the direction of the optical axis of the laser emitted by the laser, that is, move back and forth, so that by adjusting The support moves to adjust the direction of the laser light emitted by the laser.
  • the rangefinder is provided with a casing, and a component for moving the beam combiner (negative filter) is arranged in the casing, and by adjusting the beam combiner (negative filter) , adjust the direction of the laser emitted by the laser.
  • the laser light emitted by the first laser module passes through the negative filter
  • the laser light emitted by the second laser module passes through the beam combiner (negative filter)
  • two are combined into a laser beam.
  • the laser light emitted by the first laser module is at right angles to the laser light emitted by the second laser module.
  • the beam combiner (negative filter) forms an inner angle of 45 degrees with the laser beam emitted by the first laser module and the laser beam emitted by the second laser module.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

一种双光源激光测距仪，包括光学承载基座（3）、接收透镜（5）、接收光电传感器（8）、激光发射装置和光学测量接收装置；该激光发射装置包括至少一个第一激光模组（1）和至少一个第二激光模组（2）；其中，该第一激光模组（1）用于发射可见的较短波长的激光，该激光用于指示测量目标（6）；该第二激光模组（2）用于发射较长波长的激光，该激光用于测量距离；该光学测量接收装置包括至少一个合束镜(负性滤光片)（4）和至少一个测量激光滤光片（7）；其中，该合束镜(负性滤光片)（4）用于反射第一激光模组（1）发射的激光，其反射波长与第一激光模组（1）发射的激光的波长一致。

Description

双光源激光测距仪 技术领域
本实用新型涉及一种激光测距装置，具体涉及一种双光源激光测距仪。
背景技术
激光测距仪的用途越来越多，在工程测量、建筑测量以及家庭装修方面有着广泛的应用。激光测距仪是利用调制激光的某个参数实现对目标的距离测量的仪器，按照测距方法分为脉冲法测距仪和脉冲法测距仪，脉冲式激光测距仪是在工作时向目标射出一束或一序列短暂的脉冲激光束，由光电元件接收目标反射的激光束，计时器测定激光束从发射到接收的时间，计算出从观测者到目标的距离。相位法激光测距仪是利用检测发射光和反射光在空间中传播时发生的相位差来检测距离的。激光测距仪重量轻、体积小、操作简单速度快而准确，其误差仅为其它光学测距仪的五分之一到数百分之一。
现在常见的激光测距仪的光源一般采用红光，红外光，绿光等。其中，红外光相对于接收传感器来说接收灵敏度高，但相对于人眼却不可见。绿光人眼敏感度高，但绿光接收光传感器灵敏度相对于红光或红外光低很多。
例如，专利号为201420105329.X的专利文献公开了一种小型绿光测距仪，其包括绿光指示系统，绿光指示系统包括激光驱动装置、半导体激光器、自倍频晶体、发射透镜，激光驱动装置、半导体激光器、自倍频晶体、发射透镜依次排列形成绿光指示系统由指示按钮控制，其还包括测距系统，测距系统包括接收透镜、光电转换装置、控制装置、显示装置，接收透镜、光电转换装置、控制装置、显示装置和绿光指示系统共同形成绿光测距系统并由测距按钮控制。优化地，其还包括壳体，显示装置和测距按钮、显示按钮设置在壳体的表面，其他的设置在壳体内部。
当作为绿光测距装置应用时，其操作过程是这样的：按动测距按钮，控制装置控制激光驱动装置，产生正弦信号驱动半导体激光器的激光产生，激光经过自倍频晶体后，产生绿色激光，一部分绿色激光经过发射透镜发射到目标上，经目标漫反射回来的激光通过接收透镜，经过光电转化装置转化为电信号一，另外一部分绿色激光直接精光光电转化装置转化为电信号二，电信号一和电信号二经控制系统采集和处理，通过显示装置显示出来。
当作为绿光指示系统使用时，按下指示按钮，控制系统装置控制激光驱动装置，直接产生驱动电流驱动半导体激光器激光的产生，激光经自倍频晶体后直接产生绿色激光，形成目标指 示功能。该绿光测距仪结合了绿色激光指示和绿色激光测距功能，既可以作为激光指示用途，也可以作为激光测距功能。
本发明人发现，上述技术方案中存在如下缺点：测量激光与指示激光的位置有偏差。
实用新型内容
本实用新型的目的在于提供一种人眼可视性更好，传感器灵敏度更高的激光测距仪。
本实用新型采用的技术方案是：一种双光源激光测距仪，包括光学承载基座、接收透镜、接收光电传感器、激光发射装置和光学测量接收装置；所述激光发射装置包括至少一个第一激光模组和至少一个第二激光模组；其中，所述第一激光模组用于发射可见的较短波长的激光，该激光用于指示测量目标；所述第二激光模组用于发射较长波长的激光，该激光用于测量距离；所述光学测量接收装置包括至少一个合束镜(负性滤光片)和至少一个测量激光滤光片；其中，所述合束镜(负性滤光片)用于反射所述第一激光模组发射的激光，其反射波长与所述第一激光模组发射的激光的波长一致；且，所述合束镜(负性滤光片)的半带宽不大于所述第一激光模组和第二激光模组发射的激光之间的波长差；所述测量激光滤光片用于只容许测量激光通过，所述测量激光滤光片的波长与所述第二激光模组发射的激光波长一致，且所述测量激光滤光片的半带宽小于所述第一激光模组和第二激光模组发射的激光之间的波长差；所述第一激光模组发出的激光由所述合束镜(负性滤光片)反射后射至测量目标；所述第二激光模组发出的激光穿过所述合束镜(负性滤光片)后射至测量目标，经测量目标反射后射入所述接收透镜，最后射入位于所述接收透镜之下的接收光电传感器。
进一步地，所述第一激光模组和第二激光模组均包括支架、激光准直镜片和激光器，其中，所述第一激光模组的激光器发射波长为500NM-550NM或620NM-690NM。
进一步地，所述测距仪设有外壳，在所述外壳内设有使所述激光器的支架移动的部件，所述支架可在垂直于所述激光器发射激光的光轴的两个方向上移动，如上下移动或左右移动，所述支架的移动带动激光器移动进行发射光的校准；此外，所述支架还可沿所述激光器发射激光的光轴的方向进行移动，即前后移动，从而通过调节所述支架移动，调节所述激光器发射的激光方向。
进一步地，所述测距仪设有外壳，在所述外壳内设有使所述合束镜(负性滤光片)移动的部件，通过调节所述合束镜(负性滤光片)，调节所述激光器发射的激光方向。
优选地，所述第一激光模组发射的激光通过所述负性滤光片后，与所述第二激光模组发射的激光通过所述合束镜(负性滤光片)后，二者重合为一束激光。
优选地，所述第一激光模组发射的激光与所述第二激光模组发射的激光成直角。
优选地，所述合束镜(负性滤光片)与所述第一激光模组发射的激光和所述第二激光模组发射的激光组成的内角成45度。
本实用新型的有益效果在于：本实用新型通过双光源的设计，实现人眼可视性更好，且传感器的灵敏度更高。
附图说明
图1为本实用新型的结构示意图。
图中，1、第一激光模组；2、第二激光模组；3，光学承载基座；4、合束镜(负性滤光片)；5、接收透镜，6、测量目标；7、测量激光滤光片(只通过测量激光波长)，8、接收光电传感器。
具体实施方式
下面将结合本实用新型实施例中的附图，对实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本实用新型的一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。
本实用新型中的术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”、“第三”的特征可以明示或者隐含地包括至少一个该特征。本实用新型的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。本实用新型实施例中所有方向性指示(诸如上、下、左、右、前、后……)仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本实用新型的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
如图1所示，一种双光源激光测距仪，包括光学承载基座(3)、接收透镜(5)、接收光电传感器(8)、激光发射装置和光学测量接收装置，其特征在于：所述激光发射装置包括至少一个第一激光模组(1)和至少一个第二激光模组(2)；其中，所述第一激光模组用于发射可见 的较短波长的激光，该激光用于指示测量目标；所述第二激光模组用于发射较长波长的激光，该激光用于测量距离；所述光学测量接收装置包括至少一个合束镜(4)(负性滤光片)和至少一个测量激光滤光片(7)；其中，所述合束镜(负性滤光片)用于反射所述第一激光模组发射的激光，其反射波长与所述第一激光模组发射的激光的波长一致；且，所述合束镜(负性滤光片)的半带宽不大于所述第一激光模组和第二激光模组发射的激光之间的波长差；所述测量激光滤光片用于只容许测量激光通过，所述测量激光滤光片的波长与所述第二激光模组发射的激光波长一致，且所述测量激光滤光片的半带宽小于所述第一激光模组和第二激光模组发射的激光之间的波长差；所述第一激光模组发出的激光由所述合束镜(负性滤光片)反射后射至测量目标(6)；所述第二激光模组发出的激光穿过所述合束镜(负性滤光片)后射至测量目标(6)，经测量目标反射后射入所述接收透镜，最后射入位于所述接收透镜之下的接收光电传感器。
进一步地，所述第一激光模组和第二激光模组均包括支架、激光准直镜片和激光器，其中，所述第一激光模组的激光器发射波长为500NM-550NM或620NM-690NM。
进一步地，所述测距仪设有外壳，在所述外壳内设有使所述激光器的支架移动的部件，所述支架可在垂直于所述激光器发射激光的光轴的两个方向上移动，如上下移动或左右移动，所述支架的移动带动激光器移动进行发射光的校准；此外，所述支架还可沿所述激光器发射激光的光轴的方向进行移动，即前后移动，从而通过调节所述支架移动，调节所述激光器发射的激光方向。
进一步地，所述测距仪设有外壳，在所述外壳内设有使所述合束镜(负性滤光片)移动的部件，通过调节所述合束镜(负性滤光片)，调节所述激光器发射的激光方向。
优选地，所述第一激光模组发射的激光通过所述负性滤光片后，与所述第二激光模组发射的激光通过所述合束镜(负性滤光片)后，二者重合为一束激光。
优选地，所述第一激光模组发射的激光与所述第二激光模组发射的激光成直角。
优选地，所述合束镜(负性滤光片)与所述第一激光模组发射的激光和所述第二激光模组发射的激光组成的内角成45度。
以上所述仅为本实用新型的较佳实施例而已，并不用以限制本实用新型，凡在本实用新型的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本实用新型的保护范围之内。

Claims (7)

  1. 一种双光源激光测距仪，包括光学承载基座、接收透镜、接收光电传感器、激光发射装置和光学测量接收装置，其特征在于：所述激光发射装置包括至少一个第一激光模组和至少一个第二激光模组；其中，所述第一激光模组用于发射可见的较短波长的激光，该激光用于指示测量目标；所述第二激光模组用于发射较长波长的激光，该激光用于测量距离；所述光学测量接收装置包括至少一个合束镜和至少一个测量激光滤光片；其中，所述合束镜用于反射所述第一激光模组发射的激光，其反射波长与所述第一激光模组发射的激光的波长一致；且，所述合束镜的半带宽不大于所述第一激光模组和第二激光模组发射的激光之间的波长差；所述测量激光滤光片用于只容许测量激光通过，所述测量激光滤光片的波长与所述第二激光模组发射的激光波长一致，且所述测量激光滤光片的半带宽小于所述第一激光模组和第二激光模组发射的激光之间的波长差；所述第一激光模组发出的激光由所述合束镜反射后射至测量目标；所述第二激光模组发出的激光穿过所述合束镜后射至测量目标，经测量目标反射后射入所述接收透镜，最后射入位于所述接收透镜之下的接收光电传感器。
  2. 根据权利要求1所述的双光源激光测距仪，其特征在于，所述第一激光模组和第二激光模组均包括支架、激光准直镜片和激光器，其中，所述第一激光模组的激光器发射波长为500NM-550NM或620NM-690NM。
  3. 根据权利要求2所述的双光源激光测距仪，其特征在于，所述测距仪设有外壳，在所述外壳内设有使所述激光器的支架移动的部件，所述支架可在垂直于所述激光器发射激光的光轴的两个方向上移动，如上下移动或左右移动，所述支架的移动带动激光器移动进行发射光的校准；此外，所述支架还可沿所述激光器发射激光的光轴的方向进行移动，即前后移动，从而通过调节所述支架移动， 调节所述激光器发射的激光方向。
  4. 根据权利要求1所述的双光源激光测距仪，其特征在于，所述测距仪设有外壳，在所述外壳内设有使所述合束镜移动的部件，通过调节所述合束镜，调节所述激光器发射的激光方向。
  5. 根据权利要求1所述的双光源激光测距仪，其特征在于，所述第一激光模组发射的激光通过所述负性滤光片后，与所述第二激光模组发射的激光通过所述合束镜后，二者重合为一束激光。
  6. 根据权利要求1所述的双光源激光测距仪，其特征在于，所述第一激光模组发射的激光与所述第二激光模组发射的激光成直角。
  7. 根据权利要求1所述的双光源激光测距仪，其特征在于，所述合束镜与所述第一激光模组发射的激光和所述第二激光模组发射的激光组成的内角成45度。
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