Aiming focusing type infrared temperature measurement optical system and infrared thermometer

Abstract

The utility model belongs to the technical field of infrared thermometers, and particularly relates to an aiming focusing type infrared temperature measurement optical system, which comprises an infrared collecting module and a light emitting module. The infrared collection module comprises a front flat mirror, a focusing objective lens, a transflective mirror and an infrared detector which are sequentially, optically and coaxially arranged from front to back, and the front flat mirror and the focusing objective lens can synchronously move front and back; the light emitting module comprises a reflective mirror and a light emitter, the reflective mirror is arranged on the side of the transflective mirror, and light emitted by the light emitter is reflected to the transflective mirror through the reflective mirror and then is irradiated to an object to be subjected to temperature measurement through the focusing objective lens and the front flat mirror in sequence by the transflective mirror so as to aim at a target temperature measurement point. The front flat mirror and the focusing objective lens are synchronously moved back and forth to realize focal length adjustment of the optical system, so that a light spot focus point of the laser transmitter is accurately aimed at and displayed at a target temperature measurement point of an object to be subjected to temperature measurement, and the optical system is high in visualization degree, convenient to operate, low in requirement on an operator, convenient to operate and high in aiming precision and pointing direction.

Description

Technical Field

[0001] The utility model belongs to the technical field of infrared thermometers, and particularly relates to an aiming and focusing infrared temperature measuring optical system and an infrared thermometer. Background Art

[0002] Infrared temperature measurement is a non-contact temperature measurement method. The infrared thermometer does not contact the measured medium. It measures the temperature based on the principle of thermal radiation, that is, it measures the infrared energy radiated by the object itself to determine its surface temperature. When the infrared thermometer measures the target temperature point of the object, it needs to aim at the target temperature point first. There are two existing aiming structures: one is eyepiece aiming; the other is laser aiming.

[0003] For example, existing patent applications 201120242390.5, 202111552091.6, 201010164390.8, etc. disclose infrared temperature measuring devices integrated with an eyepiece aiming function, that is, aiming at a target temperature measuring point through an eyepiece. However, existing infrared temperature measuring devices integrated with an eyepiece aiming function have the following obvious defects: when aiming at the target temperature measuring point through the eyepiece, due to differences in the operator's observation and vision, the aiming effect is inconsistent and poor, and the optimal objective lens focusing measurement effect cannot be achieved, resulting in low aiming accuracy; in addition, the operation is inconvenient and requires a high degree of professionalism from the operator.

[0004] For example, existing patent applications 202120512090.8 and others disclose an infrared thermometer integrated with a laser. Although it optimizes the defects of eyepiece aiming, such as inconsistent and poor aiming effects due to differences in operator observation and vision, the existing infrared thermometer integrated with a laser can only indicate the corresponding position by emitting a laser through a laser generator. In fact, the temperature measurement range of the infrared thermometer is a circular area, and the size of the circular area cannot be adjusted. The operator cannot accurately know the specific range corresponding to the temperature measurement position, but can only roughly know that the focal point of the light spot is the object to be measured, resulting in low aiming accuracy. Utility Model Content

[0005] In order to solve the problem of low aiming accuracy of infrared thermometers integrated with lasers in the prior art, the utility model provides an aiming and focusing infrared temperature measurement optical system and an infrared thermometer.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: an aiming and focusing infrared temperature measurement optical system, including an infrared collection module and a light emitting module; the infrared collection module includes a front flat mirror, a focusing objective lens, a transflective mirror and an infrared detector optically coaxially arranged from front to back, and the front flat mirror and the focusing objective lens can move forward and backward synchronously; the light emitting module includes a reflector and a light emitter, the reflector is arranged on the side of the transflective mirror, and the light emitted by the light emitter is reflected by the reflector to the transflective mirror, and then irradiated by the transflective mirror to the object to be measured through the focusing objective lens and the front flat mirror in sequence to aim at the target temperature measurement point.

[0007] Preferably, the light emitter is a laser emitter. The front flat mirror and the focusing objective lens are synchronously moved forward and backward to adjust the focal length of the optical system, so that the laser point of the laser emitter is focused into a bright and minimum light spot (light spot focus point) to accurately aim at the target temperature measurement point of the object to be measured, with high visualization, convenient operation, low requirements on the operator, convenient operation, high aiming and pointing accuracy, and low cost.

[0008] Preferably, the light emitter is an LED emitting tube. The front flat mirror and the focusing objective lens are synchronously moved forward and backward to adjust the focal length of the optical system, so that the outline of the light-emitting tube core of the LED emitting tube is clearly projected on the target temperature measurement point of the object to be measured, with high visualization, convenient operation, low requirements on the operator, convenient operation, high aiming and pointing accuracy, and low cost.

[0009] Furthermore, the optical system also includes a video aiming module, which includes a beam splitter and a digital camera. The reflector, beam splitter and light emitter are optically coaxially arranged from front to back, and the digital camera is arranged on the side of the beam splitter. External light reaches the digital camera through the beam splitter. The operator can also aim at the target temperature measurement point by observing the digital camera imaging and the circle mark in the center of the image. The light emitting module and the video aiming module are redundant designs and can adapt to various working conditions. The video aiming module and the light emitting module are combined, that is, the light spot focus point is viewed through the video aiming module, which further greatly improves the reliability and accuracy of aiming.

[0010] A sighting and focusing infrared thermometer comprises any one of the sighting and focusing infrared temperature measuring optical systems mentioned above.

[0011] Beneficial effects:

[0012] The aiming and focusing infrared temperature measuring optical system of the utility model firstly aims the aiming and focusing infrared temperature measuring optical system at the object to be measured, at which time the front flat mirror faces the object to be measured, and at the same time, the light emitted by the laser emitter is sequentially projected to the surface of the object to be measured through the reflector, the transflector, the focusing objective lens and the front flat mirror, and then the front flat mirror and the focusing objective lens are synchronously moved back and forth to adjust the focal length of the optical system, so that the light spot focus point of the laser emitter is accurately aimed and imaged at the target temperature measuring point of the object to be measured, with high visualization, convenient operation, low requirements on the operator, convenient operation and high aiming and pointing accuracy;

[0013] The aiming and focusing infrared temperature measuring optical system of the utility model also includes a video aiming module, which synchronously moves the front flat mirror and the focusing objective lens back and forth to achieve focal length adjustment of the optical system, so that when the light spot focusing point of the laser transmitter accurately aims at the target temperature measuring point of the object to be measured, the target temperature measuring point can also be aimed at by digital camera imaging. The light emitting module and the video aiming module are redundant designs and can adapt to various working conditions; and the video aiming module can be combined with the light emitting module, that is, the video aiming module can be used to check whether the light spot focusing point accurately hits the target temperature measuring point, thereby further greatly improving the reliability and accuracy of aiming, the requirements for the operator are not high, the aiming operation is convenient, and the aiming of the target temperature measuring point is accurate and consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 This is a schematic diagram of the optical path of the aiming and focusing infrared temperature measurement optical system of the utility model;

[0016] Figure 2 It is a schematic diagram of the optical path of the aiming and focusing infrared temperature measurement optical system of the utility model, in which a video aiming module is added;

[0017] The arrow direction in the figure indicates the synchronous movement direction of the front flat mirror and the focusing objective lens;

[0018] In the figure: 1. infrared collection module, 11. front flat mirror, 12. focusing objective lens, 13. transflective mirror, 14. infrared detector, 2. light emitting module, 21. reflector, 22. light emitter, 3. video aiming module, 31. spectroscope, 32. digital camera, 4. target temperature measurement point. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Embodiment 1:

[0021] like Figure 1 As shown, an aiming and focusing infrared temperature measurement optical system, for the convenience of description in this embodiment, the operator's visual direction is forward. The aiming and focusing infrared temperature measurement optical system includes an infrared ray collecting module 1 and a light emitting module 2; the infrared ray collecting module 1 includes a front flat mirror 11, a focusing objective lens 12, a transflective mirror 13 and an infrared detector 14 optically coaxially arranged from front to back, and the front flat mirror 11 and the focusing objective lens 12 can move forward and backward synchronously; the light emitting module 2 includes a reflector 21 and a light emitter 22, the reflector 21 is arranged on the side of the transflective mirror 13, and the light emitted by the light emitter 22 is reflected by the reflector 21 to the transflective mirror 13, and then irradiated by the transflective mirror 13 to the object to be measured through the focusing objective lens 12 and the front flat mirror 11 in sequence, so as to aim at the target temperature measurement point 4.

[0022] Specifically, the light emitter 22 of the present embodiment is a laser emitter, which synchronously moves the front flat mirror 11 and the focusing objective lens 12 forward and backward to achieve focal length adjustment of the optical system, so that the laser point of the laser emitter is focused into a high-brightness and minimum light spot and then accurately aimed at the target temperature measurement point 4 of the object to be measured. It has a high degree of visualization, convenient operation, low requirements on the operator, convenient operation, high aiming and pointing accuracy, and low cost.

[0023] like Figure 2 As shown, in this embodiment, the optical system also includes a video aiming module 3, which includes a beam splitter 31 and a digital camera 32. The reflector 21, the beam splitter 31 and the light emitter 22 are optically coaxially arranged from front to back, and the digital camera 32 is arranged on the side of the beam splitter 31. External light reaches the digital camera 32 through the beam splitter 31.

[0024] The aiming process of the aiming and focusing infrared temperature measurement optical system is as follows:

[0025] First, the aiming and focusing infrared temperature measurement optical system is pre-aimed at the object to be measured. At this time, the front flat mirror 11 is facing the object to be measured. At the same time, the light emitted by the laser transmitter is sequentially projected to the surface of the object to be measured through the reflector 21, the transflective mirror 13, the focusing objective lens 12 and the front flat mirror 11, and then the front flat mirror 11 and the focusing objective lens 12 are synchronously moved back and forth to achieve the focal length adjustment of the optical system, so that the laser point of the laser transmitter is focused into a highlight and minimum light spot (light spot focal point) to accurately aim at the target temperature measurement point 4 of the object to be measured; at this time, the target temperature measurement point 4 can also be aimed at by imaging with a digital camera 32 and marking the center circle of the image. The light emitting module 2 and the video aiming module 3 are redundant designs and can adapt to various working conditions; and the video aiming module 3 can be combined with the light emitting module 2, that is, the video aiming module 3 is used to check whether the light spot focal point accurately hits the target temperature measurement point 4, further greatly improving the reliability and accuracy of aiming, and the requirements for the operator are not high, the aiming operation is convenient, and the aiming of the target temperature measurement point 4 is accurate and consistent.

[0026] Embodiment 2:

[0027] The difference between this embodiment and embodiment 1 is that the light emitter 22 is an LED emitting tube, and the front flat mirror 11 and the focusing objective lens 12 are moved forward and backward synchronously to achieve focal length adjustment of the optical system, so that the outline of the light-emitting tube core of the LED emitting tube is clearly projected on the target temperature measurement point 4 of the object to be measured, with high visualization, convenient operation, low requirements on the operator, convenient operation, high aiming and pointing accuracy, and low cost.

[0028] Embodiment 3:

[0029] The difference between this embodiment and any one of Embodiments 1 or 2 is that this embodiment further provides an aiming and focusing infrared thermometer, which includes the aiming and focusing infrared temperature measurement optical system described in any one of Embodiments 1 or 2.

[0030] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. An aiming and focusing infrared temperature measurement optical system, characterized in that: The invention comprises an infrared ray collecting module (1) and a light emitting module (2); the infrared ray collecting module (1) comprises a front flat mirror (11), a focusing lens (12), a transflective mirror (13) and an infrared detector (14) which are optically coaxially arranged in sequence from front to back, and the front flat mirror (11) and the focusing lens (12) can move forward and backward synchronously; the light emitting module (2) comprises a reflective mirror (21) and a light emitter (22); the reflective mirror (21) is arranged on the side of the transflective mirror (13); the light emitted by the light emitter (22) is reflected to the transflective mirror (13) through the reflective mirror (21), and then irradiated to the object to be measured temperature by the transflective mirror (13) through the focusing lens (12) and the front flat mirror (11) in sequence, so as to aim at the target temperature measurement point (4).

2. The aiming and focusing infrared temperature measurement optical system according to claim 1 is characterized in that: The light emitter (22) is a laser emitter.

3. The aiming and focusing infrared temperature measurement optical system according to claim 1 is characterized in that: The light emitter (22) is an LED emission tube.

4. The aiming and focusing infrared temperature measurement optical system according to any one of claims 1 to 3, characterized in that: The optical system also includes a video aiming module (3), the video aiming module (3) including a beam splitter (31) and a digital camera (32), the reflector (21), the beam splitter (31) and the light emitter (22) are optically coaxially arranged from front to back, the digital camera (32) is arranged on the side of the beam splitter (31), and external light reaches the digital camera (32) through the beam splitter (31).

5. An aiming and focusing infrared thermometer, characterized in that: The aiming and focusing infrared thermometer comprises the aiming and focusing infrared temperature measuring optical system described in any one of claims 1-4.

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