Radiation thermometry device

Abstract

A radiation thermometry device, comprising: a light collection module (100), a first light-splitting module (200), a second light-splitting module (400), a third light-splitting module (700) and a visual aiming module (800) which are coaxially arranged in sequence in a direction away from an object to be measured; and an imaging module (300), a temperature measurement module (500) and a laser emission module (600). The imaging module (300), temperature measurement module (500) and laser emission module (600), respectively by means of the first light-splitting module (200), second light-splitting module (400) and third light-splitting module (700), and the visual aiming module (800) achieve the effect of optical paths in four channels being coaxial, thus achieving the functions of imaging, temperature measurement, laser indication and visual aiming. The device integrates more functions and can adapt to more application requirements, and the level of integration thereof is improved.

Description

A radiation temperature measuring device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 18, 2023, with application number 202311056822.7 and invention name “A Radiation Temperature Measurement Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to temperature measurement technology, and in particular to a radiation temperature measurement device. Background Art

[0003] Temperature measurement technology is increasingly being used. With the development of this technology, radiation temperature measurement equipment has become a common tool for non-contact temperature measurement. The main operating principle of radiation temperature measurement equipment is to determine and infer the temperature of an object based on the energy of short-wave infrared light emitted by the object's thermal radiation.

[0004] To meet diverse application needs, related technologies have introduced radiation temperature measurement devices with integrated visual aiming or laser pointing capabilities. However, these devices only integrate a single function, beyond temperature measurement, and are unable to simultaneously address diverse application requirements. Their level of integration still needs to be improved.

[0005] Summary of the Invention

[0006] The purpose of the embodiments of the present application is to provide a radiation temperature measurement device that integrates more functions, adapts to more application requirements, and improves integration. The specific technical solutions are as follows:

[0007] An embodiment of the first aspect of the present application provides a radiation temperature measurement device, comprising: a light collecting module, a first spectroscopic module, a second spectroscopic module, a third spectroscopic module and a visual aiming module, which are coaxially arranged in sequence along a direction away from the object to be measured; and an imaging module, a temperature measurement module and a laser emission module; wherein the light collecting module comprises: a front group of objective lenses, for collecting light emitted by the object to be measured and transmitting it to the first spectroscopic module; the first spectroscopic module, for reflecting part of the visible light transmitted from the front group of objective lenses to the imaging module for imaging, and transmitting part of the visible light and short-wave infrared light emitted by the object to be measured to the second spectroscopic module; the second spectroscopic module, for reflecting the short-wave infrared light transmitted from the first spectroscopic module to the temperature measurement module for temperature measurement, and transmitting part of the visible light to the third spectroscopic module; the third spectroscopic module, for reflecting the laser light emitted by the laser emission module to the second spectroscopic module, so that the laser light passes through the second spectroscopic module, the first spectroscopic module and the light collecting module in sequence and is transmitted to the object to be measured; and transmitting part of the visible light transmitted from the second spectroscopic module to the visual aiming module.

[0008] The radiation temperature measurement device according to the embodiment of the present application may also have the following technical features:

[0009] In some embodiments of the present application, the front objective lens group includes: a lens capable of transmitting visible light, short-wave infrared light and laser light.

[0010] In some embodiments of the present application, the first beam splitting module is a first beam splitting prism, and a first beam splitting surface of the first beam splitting prism is coated with a beam splitting film layer that can reflect part of visible light and transmit other light.

[0011] In some embodiments of the present application, the imaging module is provided with a variable aperture, a rear objective lens group, and an image sensor in sequence along the incident direction of visible light. The three are on the same optical axis, and the distance between the three is fixed; the variable aperture limits the energy of the incident visible light by adjusting the aperture diameter; the image sensor is used to perform imaging based on the light adjusted by the variable aperture and the rear objective lens group.

[0012] In some embodiments of the present application, the imaging module is provided with a rear objective lens group and an image sensor in sequence on the same optical axis along the incident direction of visible light; the rear objective lens group is used to converge part of the visible light reflected by the first spectroscopic module onto the image sensor for imaging, so that the distance from the front objective lens group to the image sensor is less than the focal length of the front objective lens group.

[0013] In some embodiments of the present application, the imaging module also includes: a variable aperture arranged between the second spectroscopic module and the objective lens rear group; the variable aperture, the objective lens rear group and the image sensor are on the same optical axis, and the distance between the three is fixed; the variable aperture limits the energy of the incident visible light by adjusting the aperture diameter; the objective lens rear group is used to converge part of the visible light reflected by the first spectroscopic module onto the image sensor after passing through the variable aperture for imaging; the image sensor is used to perform imaging based on the light adjusted by the variable aperture and the objective lens rear group.

[0014] In some embodiments of the present application, the rear group of the objective lens includes: a first spherical mirror, a second spherical mirror, a third spherical mirror, a fourth spherical mirror, a fifth spherical mirror and a sixth spherical mirror arranged in sequence along the incident light; the first spherical mirror and the sixth spherical mirror have negative optical power, and the second spherical mirror, the third spherical mirror, the fourth spherical mirror and the fifth spherical mirror have positive optical power.

[0015] In some embodiments of the present application, the second light splitting module includes: a second light splitting prism, the second light splitting

[0016] The second spectroscopic surface of the prism is coated with a spectroscopic film layer that can reflect short-wave infrared light and transmit other light; or, the second spectroscopic module is a first filter, and the first filter is coated with a spectroscopic film that can reflect short-wave infrared light and transmit other light.

[0017] In some embodiments of the present application, the temperature measurement module is provided with a second filter and a thermal radiation detector in sequence along the incident direction of the short-wave infrared light; the second filter is coated with a dichroic film that can transmit short-wave infrared light and reflect other light; after the thermal radiation detector receives the short-wave infrared light, it converts it through an algorithm and outputs the target temperature.

[0018] In some embodiments of the present application, it also includes: a control module and a display module; the control module is electrically connected to the laser emission module, the thermal radiation detector, the imaging module and the display module, and is used to control the laser emission module to emit laser; receives the target temperature output by the thermal radiation detector and displays it on the display module; and receives the image generated by the imaging module and displays it on the display module.

[0019] In some embodiments of the present application, the laser emission module is a red laser emitter with a wavelength of 650 nm. In some embodiments of the present application, the third spectroscopic module includes: a third spectroscopic prism, wherein the third spectroscopic surface of the third spectroscopic prism is coated with a spectroscopic film layer capable of reflecting laser light and transmitting other light; or the third spectroscopic module is a third filter, wherein the third filter is coated with a spectroscopic film capable of reflecting laser light and transmitting other light.

[0020] In some embodiments of the present application, the visual aiming module is provided with a steering mirror group, a graticule and an eyepiece group in sequence along the incident direction of light, the three are on the same optical axis, and the distance between the three is fixed; the steering mirror group includes: a seventh spherical mirror, an eighth spherical mirror and a ninth spherical mirror arranged in sequence along the incident light; the seventh spherical mirror and the ninth spherical mirror have positive optical focal length, and the eighth spherical mirror has negative optical focal length; the graticule is a graticule of single-sided polishing and double-sided polishing; the eyepiece group includes: a tenth spherical mirror, an eleventh spherical mirror and an exit pupil window arranged in sequence along the incident light; the tenth spherical mirror and the eleventh spherical mirror have positive optical focal length.

[0021] Beneficial effects of the embodiments of the present application: The radiation temperature measurement device provided in the embodiments of the present application adopts a common optical path design. By coaxially connecting the four optical paths of the imaging module, temperature measurement module, laser emission module, and visual aiming module, it realizes imaging, temperature measurement, laser indication, and visual aiming functions. This integrates more functions, can adapt to more application requirements, and improves integration. Of course, implementing any product or method of the present application does not necessarily require achieving all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0023] FIG1a is a schematic diagram of a module of a radiation temperature measurement device in the related art;

[0024] FIG1b is a module schematic diagram of another radiation temperature measurement device in the related art;

[0025] FIG2 is a schematic structural diagram of an embodiment of a radiation temperature measurement device provided in an embodiment of the present application;

[0026] FIG3 is a diagram illustrating the structure and optical path of a radiation temperature measurement device provided in an embodiment of the present application;

[0027] FIG4 is a diagram illustrating a structure and optical path of an imaging module according to the embodiment shown in FIG3 ;

[0028] FIG5 is a schematic diagram of the distance between the variable aperture and the light collection module in the embodiment shown in FIG3 ;

[0029] FIG6 is a schematic diagram of electrical connections between the control module and other modules in the embodiment shown in FIG3 ;

[0030] FIG7 is a diagram illustrating a structure and optical path of a temperature measurement module according to the embodiment shown in FIG3 ;

[0031] FIG8 is a diagram illustrating the structure and optical path of another embodiment of a radiation temperature measurement device provided in an embodiment of the present application.

[0032] Description of reference numerals:

[0033] In FIG1a and FIG1b: light collecting module 10; light splitting module 20; temperature measuring module 30; visual aiming module 40; laser emitting module 50;

[0034] In Figures 2 to 8: light collecting module 100; objective lens front group 110; first beam splitting module 200; first beam splitting prism 210; first beam splitting surface 2101; imaging module 300; variable aperture 310; objective lens rear group 320; first spherical mirror 3201; second spherical mirror 3202; third spherical mirror 3203; fourth spherical mirror 3204; fifth spherical mirror 3205; sixth spherical mirror 3206; image sensor 330; second beam splitting module 400; second beam splitting prism 410; second beam splitting surface 4101; first filter 42 0; temperature measurement module 500; second optical filter 510; thermal radiation detector 520; laser emission module 600; third spectrometer module 700; third spectrometer prism 710; third spectrometer surface 7101; third optical filter 720; visual aiming module 800; steering mirror group 810; seventh spherical mirror 8101; eighth spherical mirror 8102; ninth spherical mirror 8103; graticule 820; eyepiece group 830; tenth spherical mirror 8301; eleventh spherical mirror 8302; exit pupil window 8303; control module 910; display module 920. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of this application more clearly understood, the present application is further described below with reference to the accompanying drawings and examples. It is apparent that the described examples are only a portion of the embodiments of this application, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the examples in this application are intended to fall within the scope of protection of this application.

[0036] As shown in Figure 1a, in the related art, the radiation temperature measurement device integrated with the visual aiming function generally includes: a light collecting module 10, a spectroscopic module 20, a temperature measurement module 30, and a visual aiming module 40; light enters the device through the light collecting module 10, and is divided into two paths by the spectroscopic module 20. The infrared path enters the temperature measurement module 30 and is converted into an actual temperature value through an algorithm, and the visible light path enters the visual aiming module 40 for eyepiece imaging.

[0037] As shown in Figure 1b, in the related art, the radiation temperature measurement device integrated with the laser indication function usually includes: a light collecting module 10, a spectroscopic module 20, a temperature measurement module 30 and a laser emitting module 50. The light enters the device through the light collecting module 10, and the infrared light is separated into the temperature measurement module 30 by the spectroscopic module 20, and is converted into an actual temperature value through an algorithm. At the same time, the laser emitting module 50 emits laser light, which is transmitted through the spectroscopic module 20 and the light collecting module 10 in sequence to complete the laser indication.

[0038] In the related art, there are also radiation temperature measurement devices with integrated imaging functions. Such radiation temperature measurement devices usually place a separate imaging module at the front end of the temperature measurement device for video stream imaging. The imaging module coincides with the optical axis of the focusing optical component. When the temperature measurement module is working, the imaging module is used for video stream observation and aiming. This temperature measurement device has the following shortcomings: A. The imaging module is a separate module, which will block part of the optical path of the thermal radiation, resulting in a reduction in the energy incident on the temperature measurement module; B. The temperature measurement module requires the front group of the objective lens to have a longer focal length to measure the temperature of smaller targets, while the imaging module requires the front group of the objective lens to have a shorter focal length to achieve observation with a larger field of view. Therefore, the imaging module and the temperature measurement module cannot be focused synchronously through the optical component. The optical component is composed of two reflectors, which are large in size and require high assembly precision and movement precision; C. The system does not have a visual aiming module, and visual aiming and video imaging cannot be achieved simultaneously in the same system.

[0039] The radiation temperature measurement equipment in the related technology only integrates a single function based on temperature measurement, and cannot adapt to more application requirements at the same time. The integration level still needs to be improved.

[0040] To address the challenges of related technologies, the present invention provides a radiation temperature measurement device. This device integrates imaging, temperature measurement, laser pointing, and visual aiming functions through the coaxial arrangement of four optical channels: an imaging module, a temperature measurement module, a laser emission module, and a visual aiming module. This device can simultaneously accommodate a wider range of application requirements and improve integration. Two specific embodiments are described below for detailed explanation.

[0041] 2 to 7 , which illustrate an embodiment of a radiation temperature measurement device provided in an embodiment of the present application.

[0042] As shown in Figures 2 and 3, a radiation temperature measurement device provided by an embodiment of the present application includes: a light collecting module 100, a first spectroscopic module 200, a second spectroscopic module 400, a third spectroscopic module 700 and a visual aiming module 800, which are coaxially arranged in sequence in a direction away from the object to be measured; and an imaging module 300, a temperature measurement module 500 and a laser emission module 600; wherein the light collecting module 100 includes: an objective lens front group 110, which is used to collect light emitted by the object to be measured and transmit it to the first spectroscopic module 200; the first spectroscopic module 200 is used to reflect part of the visible light transmitted from the objective lens front group 110 to the imaging module 300 for imaging; For example, a part of the visible light and the short-wave infrared light emitted by the object to be measured is transmitted to the second spectroscopic module 400; the second spectroscopic module 400 is used to reflect the short-wave infrared light transmitted from the first spectroscopic module 200 to the temperature measurement module 500 for temperature measurement, and transmit part of the visible light to the third spectroscopic module 700; the third spectroscopic module 700 is used to reflect the laser emitted by the laser emitting module 600 to the second spectroscopic module 400, so that the laser passes through the second spectroscopic module 400, the first spectroscopic module 200 and the light collecting module 100 in sequence and is transmitted to the object to be measured; and transmit part of the visible light transmitted from the second spectroscopic module 400 to the visual aiming module 800.

[0043] The radiation temperature measurement device provided in the embodiment of the present application adopts a common optical path design, and realizes imaging, temperature measurement, laser indication and visual aiming functions through the coaxial four-channel optical path of the imaging module, temperature measurement module, laser emission module and visual aiming module.

[0044] In this embodiment, as shown in FIG3 , the objective lens front group 110 includes a lens capable of transmitting visible light, short-wave infrared light, and laser light.

[0045] In this embodiment, the front objective lens assembly 110 can be controlled by a motor to move horizontally along the optical axis to adjust the focal length. The lens in the front objective lens assembly 110 is a doublet lens composed of two spherical mirrors. It is primarily used to collect light emitted by the object under test and transmit it to the first spectroscopic module 200. The light emitted by the object under test primarily includes visible light, short-wave infrared light, and laser light. The aperture of the doublet lens is much larger than the photosensitive surface of the detector, so the energy received is multiplied, thereby improving the sensitivity of the system.

[0046] In this embodiment, the imaging module 300, the temperature measurement module 500, the laser emission module 600 and the visual aiming module 800 share the objective lens front group 110 as a focusing element. For targets at different object distances, four channels can be simultaneously focused through the objective lens front group, avoiding the need to focus multiple modules separately when in use, thereby facilitating the operation of the radiation temperature measurement equipment.

[0047] In this embodiment, as shown in Figure 3, the first spectroscopic module 200 can be a first spectroscopic prism 210. The first spectroscopic surface 2101 of the first spectroscopic prism 210 is coated with a spectroscopic coating that reflects a portion of visible light while transmitting other light. The "other light" here primarily refers to remaining visible light, short-wave infrared light, and laser light. In other embodiments, the first spectroscopic module 200 can be a filter with the same function. This is not a limitation.

[0048] In this embodiment, as shown in FIG5 , the thickness l5 of the first beam splitter prism 210 employed can be 17 mm. The first beam splitter prism 210 has a simple structure and a compact size, thereby not increasing the size of the radiation temperature measurement device. Furthermore, the first beam splitter prism 210 does not excessively weaken the energy of the laser beam after passing through the first beam splitter prism 210, thereby ensuring that the energy reaching the object being measured is sufficient.

[0049] In this embodiment, as shown in Figures 3 and 4, the imaging module 300 is provided with a rear objective lens group 320 and an image sensor 330 in sequence on the same optical axis along the incident direction of visible light; the rear objective lens group 320 is used to converge part of the visible light reflected by the first spectroscopic module 200 onto the image sensor 330 for imaging, so that the distance from the front objective lens group 110 to the image sensor 330 is less than the focal length of the front objective lens group 110.

[0050] In this embodiment, the first beam splitter prism 210 is used to reflect a portion of visible light into the imaging module 300, so that the imaging module 300 is closest to the light collection module 100 compared to the temperature measurement module 500 and the laser emission module 600. The variable aperture 310 in the imaging module 300 is also closer to the objective lens front group 110 in the light collection module 100. Under the same circumstances, the closer the variable aperture 310 is to the objective lens front group 110, the smaller the aperture of the objective lens front group 110 required to form the same field of view in the imaging module 300. Therefore, placing the first beam splitter prism 210 and the imaging module 300 closest to the objective lens front group in the radiation temperature measurement device facilitates the miniaturization of the overall structure and reduces the difficulty of optical design.

[0051] In the related art, the temperature measurement module 500 requires the front objective lens group 110 to have a longer focal length to measure the temperature of smaller targets, while the imaging module 300 requires the front objective lens group 110 to have a shorter focal length to achieve observation with a wider field of view. Therefore, imaging using only the front objective lens group 110 cannot avoid the above-mentioned contradiction. However, in the embodiments of the present application, by adding the rear objective lens group, the overall focal length of the optical path of the imaging module 300 is reduced, which can achieve imaging with a wide field of view without affecting the temperature measurement module 500. The rear objective lens group 320 serves to shorten the back intercept, improve the image quality of the optical system, and also reduce the length of the optical system, reducing the volume of the radiation temperature measurement device, and achieving system miniaturization.

[0052] In this embodiment, the imaging module 300 also includes: a variable aperture 310 arranged between the second spectroscopic module 400 and the objective lens rear group 320; the variable aperture 310, the objective lens rear group 320 and the image sensor 330 are on the same optical axis, and the distance between the three is fixed; the variable aperture 310 limits the energy of the incident visible light by adjusting the aperture diameter; the objective lens rear group 320 is used to converge part of the visible light reflected by the first spectroscopic module 200 through the variable aperture 310 to the image sensor 330 for imaging; the image sensor 330 is used to perform imaging based on the light adjusted by the variable aperture 310 and the objective lens rear group 320.

[0053] In this embodiment, as shown in FIG. 5 , light passes through the objective lens front group 110 along the optical axis and enters the first beam splitter prism 210 . The first beam splitting surface 2101 reflects part of the light into the variable aperture 310 . Taking into account factors such as the movement margin of the objective lens front group 110, the assembly space of the first beam-splitting prism 210 and the variable aperture 310, the distance l1 from the exit surface of the objective lens front group 110 to the incident surface of the first beam-splitting prism 210 along the optical axis is at least greater than 4 mm; the distance l2 from the incident surface of the first beam-splitting prism 210 to the first beam-splitting surface 2101 along the optical axis can be 8.5 mm; the distance l3 from the first beam-splitting surface 2101 to the exit surface of the first beam-splitting prism 210 along the optical axis can be 8.5 mm; the distance l4 from the exit surface of the first beam-splitting prism 210 to the incident surface of the variable aperture 310 along the optical axis is at least greater than 2 mm; the distance l1+l2+l3+l4 from the exit surface of the objective lens front group 110 to the incident surface of the variable aperture 310 along the optical axis is at least greater than 23 mm.

[0054] In this embodiment, the variable aperture 310 prevents excess light from entering the system and affecting the system's measurement results. Furthermore, in bright scenes, the variable aperture 310 can be reduced to prevent overexposure or burns to the image sensor 330 without affecting the energy transmitted by the main light path to the temperature measurement module 500.

[0055] In other embodiments, the imaging module 300 may not include the variable aperture 310 between the second light splitting module 400 and the objective lens rear group 320 , and the variable aperture 310 may be set according to actual needs.

[0056] In this embodiment, the image sensor 330 may be a CMOS-based image acquisition sensor. The first spectroscopic module 200 reflects a portion of the visible light transmitted from the objective lens front group 110, sequentially passing through the variable aperture 310 and the objective lens rear group 320 to the image sensor 330. A CMOS image sensor is a common image sensor manufactured using CMOS technology and has advantages such as low power consumption, low cost, and high integration. Each pixel in a CMOS sensor includes a photosensitive element and a group of transistors, which convert optical signals into electrical signals and output the signals externally via output circuits. CMOS sensors are suitable for high-speed, multi-functional, and low-power image acquisition systems.

[0057] In this embodiment, as shown in Figures 3 and 4, the rear group 320 of the objective lens includes: a first spherical mirror 3201, a second spherical mirror 3202, a third spherical mirror 3203, a fourth spherical mirror 3204, a fifth spherical mirror 3205 and a sixth spherical mirror 3206 arranged in sequence along the incident light; the first spherical mirror 3201 and the sixth spherical mirror 3206 have negative optical focal lengths, and the second spherical mirror 3202, the third spherical mirror 3203, the fourth spherical mirror 3204 and the fifth spherical mirror 3205 have positive optical focal lengths.

[0058] In this embodiment, the first spherical mirror 3201 is arranged in close contact with the second spherical mirror 3202, the fourth spherical mirror 3204, the fifth spherical mirror 3205 and the sixth spherical mirror 3206 are arranged in close contact with each other, and a preset distance is reserved between the third spherical mirror 3203 and the second spherical mirror 3202 and the fourth spherical mirror 3204.

[0059] In other embodiments, the objective lens rear group 320 may also be composed of four, five or seven spherical mirrors, which can be arranged according to actual needs.

[0060] In this embodiment, all lenses in the objective lens rear group 320 are spherical lenses, which have the advantages of low processing cost and compact structure.

[0061] In this embodiment, as shown in FIG3 , the second beam splitting module 400 includes a second beam splitting prism 410 , wherein a second beam splitting surface 4101 of the second beam splitting prism 410 is coated with a beam splitting film that reflects short-wave infrared light and transmits other light, which primarily refers to other visible light and laser light.

[0062] In this embodiment, the second beam splitter prism 410 is simple in structure and compact in size, thereby not increasing the size of the radiation temperature measurement device. Furthermore, the second beam splitter prism 410 does not excessively weaken the energy of the laser beam passing through the second beam splitter prism 410, ensuring that the energy reaches the marked object.

[0063] In this embodiment, by setting a second spectroscopic module 400 after the first spectroscopic module 200, the short-wave infrared light is reflected to the temperature measurement module 500, which can reduce the number of optical devices through which the short-wave infrared light passes, and weaken the impact of differences in device coating consistency on the short-wave infrared light, thereby affecting the measurement accuracy of the temperature measurement module 500.

[0064] In this embodiment, as shown in FIG3 , a second filter 510 and a thermal radiation detector 520 are sequentially arranged in the temperature measurement module 500 along the incident direction of the short-wave infrared light; the second filter 510 is coated with a spectroscopic film that can transmit short-wave infrared light and reflect other light.

[0065] In this embodiment, the second filter 510 is arranged perpendicular to the optical axis of the incident short-wave infrared light, and is mainly used to filter out other light except short-wave infrared light, which can avoid the influence of other light on the thermal radiation detector 520 and improve the accuracy of the thermal radiation detector 520.

[0066] In this embodiment, after the thermal radiation detector 520 receives the short-wave infrared light, it converts it through an algorithm and outputs the target temperature. The thermal radiation detector 520 is a device that works by utilizing the thermal effect of infrared radiation. The short-wave infrared light reflected by the second spectroscopic module 400 is transmitted through the second filter 510 and irradiated on the sensitive element on the thermal radiation detector 520. When the sensitive element absorbs the radiation of the short-wave infrared light, it will cause the temperature to rise, thereby causing the temperature of the detector material to change and generate an electrical signal. The thermal radiation detector 520 is a device that can infer the temperature based on a portion of the thermal radiation (sometimes called blackbody radiation) emitted by the object being measured. By understanding the infrared energy emitted by the object and its emissivity, the temperature of the object can usually be determined within a specific range of the actual temperature of the object.

[0067] In this embodiment, the laser emitting module 600 is a laser emitter with a wavelength of 650 nm red light.

[0068] In this embodiment, the laser emitter with a red light wavelength of 650 nm has high penetration and low scattering, and can better indicate the object being measured.

[0069] In this embodiment, as shown in FIG3 , the third spectrometer module 700 includes a third spectrometer 710 , wherein a third spectrometer surface 7101 of the third spectrometer 710 is coated with a spectrometer film that can reflect laser light and transmit other light. The other light here mainly refers to other visible light.

[0070] In this embodiment, by finally setting a third spectroscopic module 700 after the second spectroscopic module 400, the laser emitted by the laser emitting module 600 is reflected and emitted through the second spectroscopic module 400, the first spectroscopic module 200 and the light collecting module 100 in sequence, which can effectively reduce the impact of the laser emitting module 600 on the imaging module 300 and avoid causing color cast in the imaging video.

[0071] In this embodiment, the third beam splitter prism 710 is simple in structure and compact in size, thereby not increasing the size of the radiation temperature measurement device. Furthermore, the third beam splitter prism 710 does not excessively weaken the energy of the laser during reflection, ensuring that the energy reaches the object being measured.

[0072] In this embodiment, as shown in FIG3 , a steering lens assembly 810 , a reticle 820 and an eyepiece assembly 830 are sequentially arranged in the visual aiming module 800 along the incident direction of light. The three are on the same optical axis and the distance between them is fixed.

[0073] In this embodiment, as shown in Figure 6, the steering mirror group 810 includes: a seventh spherical mirror 8101, an eighth spherical mirror 8102 and a ninth spherical mirror 8103 arranged in sequence along the incident light; the seventh spherical mirror 8101 and the ninth spherical mirror 8103 have positive optical focal length, and the eighth spherical mirror 8102 has a negative optical focal length.

[0074] In this embodiment, since the scene to be observed is large and the aperture of the objective lens is large, the steering lens group 810 adopts a structure similar to a photographic objective lens; the steering lens group 810 is arranged after the third beam splitting module 700 and can convert the inverted image into an upright image to conform to the human eye's observation habits.

[0075] In this embodiment, the grating plate 820 is a grating plate used in single-side polishing and double-side polishing.

[0076] In this embodiment, the reticle 820 is typically engraved and marked on ordinary optical glass. The reticle 820 is an optical element used in a sight that can superimpose a cross or concentric ring reticle on the object to be imaged. This reticle can be used as a position reference and can be aligned with the object to be imaged.

[0077] In this embodiment, as shown in FIG3 , the eyepiece assembly 830 includes: a tenth spherical mirror 8301 , an eleventh spherical mirror 8302 , and an exit pupil window 8303 arranged in sequence along the incident light; the tenth spherical mirror 8301 and the eleventh spherical mirror 8302 have positive optical power.

[0078] In this embodiment, the eyepiece assembly 830 is located at the rear end of the radiation temperature measurement device. The function of the eyepiece assembly 830 is to further amplify the image magnified by the light collection module 100 and transmit it to the human eye. The distance from the eleventh spherical mirror 8302 to the exit pupil window 8303 is called the exit pupil distance. The exit pupil distance generally ranges from 50mm to 100mm, enabling the rapid acquisition of the maximum field of view, a clear image, and minimizing parallax. In the embodiment of the present application, the exit pupil distance is 70mm. At the same time, the reticle 820 and the eyepiece assembly 830 are used in conjunction to achieve clear observation of the target at the user's observation point, i.e., visual aiming.

[0079] In other embodiments, the visual aiming module 800 may also be composed of an eyepiece group and a steering mirror, which can be configured according to actual needs.

[0080] In this embodiment, as shown in FIG7 , the radiation temperature measurement device further includes: a control module 910 and a display module 920; the control module 910 is electrically connected to the laser emitting module 600, the thermal radiation detector 520, the imaging module 300, and the display module 920, and is configured to control the laser emitting module 600 to emit laser light; receive the target temperature output by the thermal radiation detector 520 and display it on the display module 920; and receive the image generated by the imaging module 300 and display it on the display module 920. The controller 910 may also be electrically connected to a motor that controls the focal length adjustment of the objective lens front group 110, so as to achieve automatic focusing by adjusting the distance between the objective lens front group 110 and the first spectrometer module 200.

[0081] Referring to FIG. 8 , FIG. 8 shows another embodiment of the radiation temperature measurement device provided in an embodiment of the present application.

[0082] Unlike the embodiment shown in FIG3 , the radiation temperature measurement device shown in FIG8 utilizes different second and third spectroscopic modules 400 and 700. As shown in FIG8 , the second spectroscopic module 400 in this embodiment can be a first filter 420 coated with a spectroscopic coating that reflects short-wave infrared light while transmitting other light. "Other light" here primarily refers to other visible light and laser light. The first filter 420 is positioned at a 45° angle to the incident axis, allowing it to reflect short-wave infrared light while transmitting other light. Simultaneously, the laser light emitted by the laser emitting module 600 is reflected by the third spectroscopic module 700, passes through the first filter 420 and the first spectroscopic prism 210, and then exits from the objective lens front group 110. The first filter 420 does not excessively attenuate the energy of the laser light passing through it, ensuring that sufficient energy reaches the object being measured. The simple structure and compact size of the first filter 420 prevent the radiation temperature measurement device from increasing in size, facilitating a compact system design.

[0083] As shown in FIG8 , the third spectroscopic module 700 in this embodiment is a third optical filter 720 coated with a spectroscopic film that reflects laser light but transmits other light. The "other light" here primarily refers to the remaining visible light. The third optical filter 720 is positioned at a 45° angle to the incident optical axis, enabling it to reflect laser light and transmit other light. Simultaneously, the laser light emitted by the laser emitting module 600 is reflected by the third optical filter 720, passes sequentially through the first optical filter 420 and the first spectroscopic prism 210, and then is emitted from the objective lens front group 110. The third optical filter 720 does not excessively weaken the laser light energy during reflection, ensuring that the energy reaching the indicated object is sufficient. The third optical filter 720 is simple in structure and compact in size, thus not increasing the size of the radiation temperature measurement device, facilitating a compact design of the system.

[0084] Of course, in other embodiments, the second light splitting module 400 and the third light splitting module 700 may not be both light splitting prisms, or may be both filters. Alternatively, one light splitting prism and one filter may be used, which can be configured according to actual needs.

[0085] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0086] Each embodiment in this specification is described in a related manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiment is generally similar to the method embodiment, so the description is relatively simple. For related parts, refer to the description of the method embodiment.

[0087] The above are only preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application are included in the scope of protection of the present application.

Claims

1. A radiation temperature measurement device, characterized in that: include: A light collecting module (100), a first light splitting module (200), a second light splitting module (400), a third light splitting module (700) and a visual aiming module (800) are coaxially arranged in sequence in a direction away from the object to be measured; and an imaging module (300), a temperature measuring module (500) and a laser emitting module (600); wherein: The light collecting module (100) comprises: a front objective lens group (110) for collecting light emitted by the object to be measured and transmitting the light to the first light splitting module (200); The first light splitting module (200) is used to reflect part of the visible light transmitted from the objective lens front group (110) to the imaging module (300) for imaging, and transmit part of the visible light and the short-wave infrared light emitted by the measured object to the second light splitting module (400); The second light splitting module (400) is used to reflect the short-wave infrared light transmitted from the first light splitting module (200) to the temperature measurement module (500) for temperature measurement, and transmit part of the visible light to the third light splitting module (700); The third spectroscopic module (700) is used to reflect the laser light emitted by the laser emission module (600) to the second spectroscopic module (400), so that the laser light passes through the second spectroscopic module (400), the first spectroscopic module (200) and the light collecting module (100) in sequence and is transmitted to the object to be measured; and to transmit part of the visible light transmitted from the second spectroscopic module (400) to the visual aiming module (800).

2. The radiation temperature measurement device according to claim 1, characterized in that: The objective lens front group (110) comprises a lens capable of transmitting visible light, short-wave infrared light and laser light.

3. The radiation temperature measurement device according to claim 1, characterized in that: The first light splitting module (200) is a first light splitting prism (210); a first light splitting surface (2101) of the first light splitting prism (210) is coated with a light splitting film layer capable of reflecting part of visible light and transmitting other light.

4. The radiation temperature measurement device according to claim 1, characterized in that: In the imaging module (300), an objective lens rear group (320) and an image sensor (330) are sequentially arranged on the same optical axis along the incident direction of visible light; the objective lens rear group (320) is used to converge part of the visible light reflected by the first light splitting module (200) onto the image sensor (330) for imaging, so that the distance from the objective lens front group (110) to the image sensor (330) is less than the focal length of the objective lens front group (110).

5. The radiation temperature measurement device according to claim 4, characterized in that: The imaging module (300) further comprises: a variable aperture (310) arranged between the second light splitting module (400) and the objective lens rear group (320); the variable aperture (310), the objective lens rear group (320) and the The three image sensors (330) are on the same optical axis and the distances between the three are fixed; The variable aperture (310) limits the energy of incident visible light by adjusting the aperture diameter; The objective lens rear group (320) is used to converge part of the visible light reflected by the first light splitting module (200) through the variable aperture (310) to form an image on the image sensor (330); The image sensor (330) is used to perform imaging based on the light adjusted by the variable aperture (310) and the objective lens rear group (320).

6. The radiation temperature measuring device according to claim 4 or 5, characterized in that: The objective lens rear group (320) comprises: a first spherical mirror (3201), a second spherical mirror (3202), a third spherical mirror (3203), a fourth spherical mirror (3204), a fifth spherical mirror (3205) and a sixth spherical mirror (3206) arranged in sequence along the incident light; The first spherical mirror (3201) and the sixth spherical mirror (3206) have negative optical power, and the second spherical mirror (3202), the third spherical mirror (3203), the fourth spherical mirror (3204) and the fifth spherical mirror (3205) have positive optical power.

7. The radiation temperature measurement device according to claim 1, characterized in that: The second light splitting module (400) comprises: a second light splitting prism (410), wherein a second light splitting surface (4101) of the second light splitting prism (410) is coated with a light splitting film layer capable of reflecting short-wave infrared light and transmitting other light; or, The second light splitting module (400) is a first filter (420), and the first filter (420) is coated with a light splitting film capable of reflecting short-wave infrared light and transmitting other light.

8. The radiation temperature measurement device according to claim 1, characterized in that: The temperature measurement module (500) is provided with a second filter (510) and a thermal radiation detector (520) in sequence along the incident direction of the short-wave infrared light; The second filter (510) is coated with a spectroscopic film capable of transmitting short-wave infrared light and reflecting other light; After receiving the short-wave infrared light, the thermal radiation detector (520) converts the light through an algorithm and outputs the target temperature.

9. The radiation temperature measurement device according to claim 8, characterized in that: It also includes: a control module (910) and a display module (920); The control module (910) is electrically connected to the laser emission module (600), the thermal radiation detector (520), the imaging module (300) and the display module (920), and is used to control the laser emission module (600) to emit laser; receiving the target temperature output by the thermal radiation detector (520) and displaying it on the display module (920); and receiving the image generated by the imaging module (300) and displaying it on the display module (920).

10. The radiation temperature measurement device according to claim 1, characterized in that: The laser emission module (600) is a red light laser emitter with a wavelength of 650 nm.

11. The radiation temperature measuring device according to claim 1, characterized in that: The third light splitting module (700) comprises: a third light splitting prism (710), wherein a third light splitting surface (7101) of the third light splitting prism (710) is coated with a light splitting film layer capable of reflecting laser light and transmitting other light; or, The third light splitting module (700) is a third light filter (720), and the third light filter (720) is coated with a light splitting film that can reflect laser light and transmit other light.

12. The radiation temperature measurement device according to claim 1, characterized in that: The visual aiming module (800) is provided with a steering mirror group (810), a graticule (820) and an eyepiece group (830) in sequence along the incident direction of light, the three being on the same optical axis and with a fixed distance between them; The steering mirror group (810) comprises: a seventh spherical mirror (8101), an eighth spherical mirror (8102) and a ninth spherical mirror (8103) arranged in sequence along the incident light; the seventh spherical mirror (8101) and the ninth spherical mirror (8103) have positive focal powers, and the eighth spherical mirror (8102) has negative focal powers; The grating plate (820) is a grating plate used in single-sided polishing and double-sided polishing. The eyepiece assembly (830) comprises: a tenth spherical mirror (8301), an eleventh spherical mirror (8302) and an exit pupil window (8303) arranged in sequence along an incident light ray; the tenth spherical mirror (8301) and the eleventh spherical mirror (8302) have positive optical power.

Images