Spectrometer

Abstract

The utility model provides a spectrograph, and relates to the technical field of measurement. The spectrograph comprises a liquid crystal module and a detection module arranged on the light-emitting side of the liquid crystal module, and the detection module is used for obtaining the light intensity of emergent light beams on the light-emitting side of the liquid crystal module. The liquid crystal module comprises a plurality of pieces of first conductive glass, a plurality of pieces of second conductive glass and a liquid crystal material, the plurality of pieces of first conductive glass and the plurality of pieces of second conductive glass are in one-to-one correspondence and are arranged in parallel, and the liquid crystal material is packaged between the first conductive glass and the second conductive glass which are arranged in parallel; and the plurality of pieces of first conductive glass are provided with high-reflection films with different light-transmitting wavebands. The second conductive glass is provided with a high-reflective film corresponding to the high-reflective film on the first conductive glass. And the high-reflective film on the first conductive glass and the high-reflective film on the second conductive glass are matched to select light of a required wave band to pass through. Measurement of multiple wave bands can be achieved, and the size is small.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement, in particular to a spectrometer. Background Art

[0002] Spectroscopic instruments are important analytical instruments that use optical principles and spectral techniques to detect the chemical composition and content of substances. They have the advantages of high analytical accuracy, large measurement range, and fast speed. They are widely used in modern scientific experiments, industrial and agricultural production, metallurgy, geology, petrochemicals, medicine and health, environmental protection, space exploration, national defense and other fields.

[0003] Traditional spectrometers are difficult to use, bulky, and expensive, which greatly limits their application scope. With the modernization of biomedicine, aerospace, environmental monitoring, agricultural science and technology, military analysis, and industrial process monitoring, the spectrometers are required to be miniaturized, micro-miniaturized, and integrated.

[0004] However, existing miniaturized spectrometers can only detect a single wavelength band and cannot perform full spectrum scanning of the measured light. Utility Model Content

[0005] The utility model aims to provide a spectrometer which can realize detection, thereby scanning the measured light in multiple bands.

[0006] The embodiment of the utility model is achieved as follows:

[0007] The present application provides a spectrometer, comprising a liquid crystal module and a detection module arranged on the light-emitting side of the liquid crystal module, wherein the detection module is used to obtain the light intensity of a light beam emitted from the light-emitting side of the liquid crystal module;

[0008] The liquid crystal module comprises a plurality of first conductive glasses, a plurality of second conductive glasses and a liquid crystal material, wherein the plurality of first conductive glasses and the plurality of second conductive glasses correspond to each other and are arranged in parallel, and the liquid crystal material is encapsulated between the first conductive glasses and the second conductive glasses arranged in parallel, and different voltages are applied to the first conductive glasses and the second conductive glasses, so that the liquid crystal material has a refractive index corresponding to the voltages;

[0009] High-reflective films with different light-transmitting bands are arranged on the plurality of first conductive glasses;

[0010] The second conductive glass is provided with a high-reflection film corresponding to the high-reflection film on the first conductive glass;

[0011] The high-reflection film on the first conductive glass and the high-reflection film on the second conductive glass cooperate to select light of a desired wavelength band to pass through;

[0012] Under the action of the liquid crystal material and the high-reflection film, light of a preset wavelength band in the incident light beam can selectively pass through the liquid crystal module to illuminate the detection module.

[0013] In an optional embodiment, the liquid crystal module further includes packaging glue;

[0014] The first conductive glass and the second conductive glass are encapsulated together by the encapsulation glue in a one-to-one correspondence, a sealed cavity is formed between the first conductive glass and the second conductive glass, and the liquid crystal material is arranged in the sealed cavity;

[0015] The plurality of first conductive glasses are in the same plane and arranged in an array;

[0016] The plurality of the second conductive glasses are in the same plane and arranged in an array;

[0017] The liquid crystal module further comprises a plurality of driving modules, each of which is electrically connected to a group of the first conductive glass and one of the second conductive glasses which are arranged opposite to each other.

[0018] In an optional embodiment, a plurality of the first conductive glasses are sequentially connected to each other to form a whole piece of conductive glass;

[0019] A plurality of the second conductive glasses are sequentially connected to each other to form a whole piece of conductive glass;

[0020] A whole block of conductive glass formed by a plurality of the first conductive glasses and a whole block of conductive glass formed by a plurality of the second conductive glasses are packaged together by packaging glue, a sealed cavity is formed between the whole block of conductive glass formed by a plurality of the first conductive glasses and the whole block of conductive glass formed by a plurality of the second conductive glasses, and the liquid crystal material is arranged in the sealed cavity;

[0021] The liquid crystal module further includes a driving module, and the driving module is electrically connected to a whole block of conductive glass formed by a plurality of first conductive glasses and a whole block of conductive glass formed by a plurality of second conductive glasses.

[0022] In an optional embodiment, the detection module includes a photodetector, and the photodetector is arranged corresponding to all the second conductive glasses to obtain the light intensity of the outgoing light beam.

[0023] In an optional embodiment, the detection module includes a plurality of photoelectric detectors, and the plurality of photoelectric detectors are arranged in one-to-one correspondence with the plurality of second conductive glasses to obtain the light intensity of the corresponding outgoing light beam.

[0024] In an optional embodiment, the high reflective film is disposed on the inner side of the first conductive glass and the second conductive glass.

[0025] In an optional embodiment, the wavelength bands of light that can be transmitted through the multiple high-reflection films set on the multiple first conductive glasses partially overlap in pairs, and the wavelength bands of light that can be transmitted through the multiple high-reflection films set on the multiple second conductive glasses partially overlap in pairs.

[0026] In an optional embodiment, the high-reflection film is a multi-layer dielectric film.

[0027] In an optional embodiment, the wavelength range of the light that can be transmitted by the high-reflective film is 400nm-1700nm.

[0028] In an optional embodiment, the first conductive glass and the second conductive glass are both ITO conductive glass.

[0029] The beneficial effects of the spectrometer provided by the embodiment of the utility model include:

[0030] The liquid crystal module of the present application includes a plurality of first conductive glasses, a plurality of second conductive glasses and a liquid crystal material. The plurality of first conductive glasses and the plurality of second conductive glasses correspond to each other and are arranged in parallel. The liquid crystal material is encapsulated between the first conductive glasses and the second conductive glasses arranged in parallel. Since the liquid crystal material has an electro-optical effect. Different voltages are applied to the first conductive glass and the second conductive glass. When the external voltage acts on the liquid crystal material, the arrangement of the liquid crystal molecules is changed, so that the effective refractive index of the liquid crystal material is changed, thereby controlling the transmittance, reflectivity or scattering degree of the light waves passing through the liquid crystal molecules. High-reflection films with different light-transmitting bands are arranged on the plurality of first conductive glasses, and high-reflection films corresponding to the light-transmitting bands of the high-reflection films on the first conductive glasses are arranged on all the second conductive glasses. Since the high-reflection film has a high reflectivity, it can allow light of a wavelength within a preset range to pass through. The high-reflection film on the first conductive glass and the high-reflection film on the second conductive glass cooperate to select light of a desired wavelength band to pass through. In this way, different wavelength bands of light entering from the light input side are selectively transmitted through the liquid crystal module through the corresponding high-reflection film with a light-transmitting wavelength band and the corresponding area of ​​the liquid crystal material to illuminate the detection module, thereby realizing multi-band or even full-band spectrum measurement. The spectrometer of the present application also has the advantages of small size and easy manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1A schematic diagram of the structure of a spectrometer provided in an embodiment of the utility model;

[0033] Figure 2 A schematic diagram of the structure of a spectrometer provided in some other embodiments of the utility model;

[0034] Figure 3 A schematic diagram of the structure of a spectrometer provided in some other embodiments of the utility model;

[0035] Figure 4 for Figure 3 Schematic diagram of another perspective of the spectrometer provided.

[0036] Icons: 100 - spectrometer; 110 - liquid crystal module; 111 - first conductive glass; 113 - second conductive glass; 115 - liquid crystal material; 117 - high reflective film; 119 - driving module; 121 - packaging glue; 123 - position detection sensor; 130 - detection module; 131 - photodetector. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Example

[0039] Please refer to Figure 1 The utility model provides a spectrometer 100, which can realize the detection of spectra in multiple bands or even full bands, so as to perform spectral scanning on the measured light.

[0040] Please refer to Figure 1 , Figure 2 and Figure 3In this embodiment, the spectrometer 100 includes a liquid crystal module 110 and a detection module 130 disposed on the light-emitting side of the liquid crystal module 110. The detection module 130 is used to obtain the light intensity of the light beam emitted from the light-emitting side of the liquid crystal module 110. The liquid crystal module 110 includes a plurality of first conductive glasses 111, a plurality of second conductive glasses 113, and a liquid crystal material 115. The plurality of first conductive glasses 111 and the plurality of second conductive glasses 113 correspond to each other and are arranged in parallel. The liquid crystal material 115 is encapsulated between the first conductive glasses 111 and the second conductive glasses 113 arranged in parallel. Different voltages are applied to the first conductive glasses 111 and the second conductive glasses 113, so that the liquid crystal material 115 has a refractive index corresponding to the voltage. High-reflection films 117 with different light-transmitting bands are disposed on the plurality of first conductive glasses 111. The second conductive glasses 113 are each provided with a high-reflection film 117 corresponding to the high-reflection film 117 on the first conductive glass 111. The high reflection film 117 on the first conductive glass 111 and the high reflection film 117 on the second conductive glass 113 cooperate to select light of a desired wavelength band to pass through. Under the action of the liquid crystal material 115 and the high reflection film 117, light of a preset wavelength band in the incident light beam can selectively pass through the liquid crystal module 110 to illuminate the detection module 130.

[0041] The liquid crystal module 110 of this embodiment includes a plurality of first conductive glasses 111, a plurality of second conductive glasses 113, and a liquid crystal material 115. The plurality of first conductive glasses 111 and the plurality of second conductive glasses 113 correspond to each other and are arranged in parallel. The liquid crystal material 115 is encapsulated between the first conductive glasses 111 and the second conductive glasses 113 arranged in parallel. Since the liquid crystal material 115 has an electro-optical effect. Different voltages are applied to the first conductive glasses 111 and the second conductive glasses 113. When the external voltage acts on the liquid crystal material 115, the arrangement of the liquid crystal molecules in the liquid crystal material 115 changes, so that the effective refractive index of the liquid crystal material 115 changes, thereby controlling the transmittance, reflectivity or scattering degree of the light waves passing through the liquid crystal molecules. High-reflection films 117 with different light-transmitting bands are arranged on the plurality of first conductive glasses 111, and high-reflection films 117 corresponding to the light-transmitting band of the high-reflection films 117 on the first conductive glasses 111 are arranged on all the second conductive glasses 113. Since the high-reflection film 117 has a high reflectivity, it can allow light with a wavelength within a preset range to pass through. In this way, the high-reflection film 117 on the first conductive glass 111 and the high-reflection film 117 on the second conductive glass 113 can cooperate to select the light of the required wavelength band to pass through, so that the light of different wavelength bands entering from the light-inlet side of the liquid crystal module 110 can pass through the high-reflection film 117 and the liquid crystal material 115 corresponding to the light-transmitting wavelength band to achieve the selective passage of the light of the required wavelength band. The light passing through different areas of the liquid crystal module 110 corresponds to different wavelength bands, and these transmitted lights are finally irradiated on the detection module 130. In this way, the spectrometer of the present application can realize the measurement of multi-band or even full-band spectra. In addition, since the spectrometer is manufactured using small-volume components such as liquid crystal modules and high-reflection films, the spectrometer 100 of the present application also has the advantages of small size and easy manufacturing.

[0042] It should be noted that the high-reflective film 117 is a special optical film, generally with a reflectivity of more than 95%. It can reflect most of the light within the preset wavelength range, while transmitting a small amount of light within the required wavelength range. Utilizing the interference phenomenon of light, when light enters from one medium to another, refraction and reflection will occur. If the two beams of light are in the same phase when they meet, they will reinforce each other to form a bright light spot. If the phases are opposite, they will cancel each other out to form a dark spot. Relying on this principle, wavelength screening can be achieved. Of course, the high-reflective film 117 will also filter light beams with wavelengths outside the preset range, and can only interfere with light within the preset wavelength range, thereby enhancing the light spot.

[0043] Please refer to Figure 1In this embodiment, the liquid crystal module 110 further includes a packaging glue 121; the first conductive glass 111 and the second conductive glass 113 are packaged together by the packaging glue 121 in a one-to-one correspondence. A sealed cavity is formed between the first conductive glass 111 and the second conductive glass 113, and the liquid crystal material 115 is disposed in the sealed cavity. The plurality of first conductive glasses 111 are in the same plane and are arranged in an array. The plurality of second conductive glasses 113 are in the same plane and are arranged in an array. The liquid crystal module 110 further includes a plurality of driving modules 119, each driving module 119 being electrically connected to a group of first conductive glasses 111 and a second conductive glass 113 disposed opposite to each other.

[0044] In this embodiment, the liquid crystal module 110 includes a plurality of liquid crystal units, and the plurality of liquid crystal units are arranged in an array (two liquid crystal units are shown in the figure, and more liquid crystal units can be arrayed in actual use). A first conductive glass 111 and a second conductive glass encapsulate the liquid crystal material 115 inside through a packaging glue 121, thus forming a liquid crystal unit. The high-reflection film 117 on the first conductive glass 111 and the second conductive glass 113 of a liquid crystal unit can transmit the same light band, while the high-reflection film 117 on different liquid crystal units can transmit different light bands. In this way, when measuring the spectrum, one liquid crystal unit corresponds to one measurement band, and the corresponding part of the incident light beam can pass through under the cooperation of the high-reflection film 117 and the liquid crystal molecules, and multiple liquid crystal units correspond to multiple bands, so that the measurement of multi-band or even full-band spectra can be realized. And the spectrometer 100 of the present application can achieve full-band measurement in a short time.

[0045] Please refer to Figure 2 In some other embodiments of the present application, a plurality of first conductive glasses 111 are sequentially connected to each other to form a whole block of conductive glass. A plurality of second conductive glasses 113 are sequentially connected to each other to form a whole block of conductive glass. A whole block of conductive glass formed by a plurality of first conductive glasses 111 and a whole block of conductive glass formed by a plurality of second conductive glasses 113 are encapsulated together by encapsulation glue 121. A sealed cavity is formed between a whole block of conductive glass formed by a plurality of first conductive glasses 111 and a whole block of conductive glass formed by a plurality of second conductive glasses 113. A liquid crystal material 115 is disposed in the sealed cavity. Here, a plurality of first conductive glasses 111 are an integrated whole block of glass. A plurality of second conductive glasses 113 are also an integrated whole block of glass. The liquid crystal module 110 further includes a driving module 119, which is electrically connected to a whole block of conductive glass formed by a plurality of first conductive glasses 111 and a whole block of conductive glass formed by a plurality of second conductive glasses 113.

[0046] In this embodiment, the liquid crystal module 110 is one. High-reflection films 117 of different structures are formed in different regions on the first conductive glass 111 and the second conductive glass 113. The high-reflection films 117 of different structures divide the liquid crystal module 110 into multiple regions, each region corresponding to a light-transmitting band. During measurement, the liquid crystal arrangement is adjusted by changing the voltage so that it corresponds to the high-reflection film 117 on one region, so that the measurement of one band of the light beam can be completed. The voltage is changed to correspond to the high-reflection film 117 in another region, so as to achieve the measurement of the corresponding band of this region, until the measurement of the corresponding band of all regions is completed, so that the spectrum of the light beam can be obtained. This embodiment has a low cost and can be implemented with only one liquid crystal module 110. However, compared with the above embodiment, multiple measurements need to be superimposed to achieve the spectrum measurement of the light beam. It should also be noted that the driving module 119 can adjust the voltage according to demand to meet the needs of the spectrometer 100 for measuring different bands. Generally, electrodes are provided on the first conductive glass 111 and the second conductive glass 113, and the driving module 119 is electrically connected to the electrodes. Driving the liquid crystal with voltages of different magnitudes will change the orientation of the liquid crystal, thereby changing the refractive index. Different refractive indices correspond to different resonant wavelengths. That is, the resonant wavelength can be changed by quickly changing the voltage to achieve the purpose of screening light waves.

[0047] Please refer to Figure 2 and Figure 3 In this embodiment, the detection module 130 includes a photodetector 131. One photodetector 131 is set corresponding to all the second conductive glasses 113 to obtain the light intensity of the outgoing light beam. During measurement, by controlling the liquid crystal module 110 and the photodetector 131 to correspond to each other, a large photodetector 131 can be used to achieve measurement of multiple bands.

[0048] In this embodiment, one photodetector 131 is provided, which can save costs.

[0049] Please refer to Figure 3 and Figure 4When the detection module 130 includes a photodetector 131, the liquid crystal module 110 formed by a plurality of first conductive glasses 111, a plurality of second conductive glasses 113 and a liquid crystal material 115 can be set in a circular ring shape and set on a rotatable mounting frame, and the photodetection unit is placed on the circumferential surface. A driving motor is set at the center of the mounting frame to drive the mounting frame to rotate. The whole is then installed in a black box, and a light inlet is set in the black box, and the photodetector 131 is set on the side of the liquid crystal module 110 opposite to the light inlet. During the test, the driving motor drives the mounting frame to rotate so that the light beam is injected into the light inlet. At this time, as the mounting frame rotates, the light inlet side of the photodetection unit will receive the light emitted from the light inlet into the liquid crystal module 110. The measurement of the light beam spectrum can be completed by rotating the mounting frame once. This is more cost-effective.

[0050] Of course, in other embodiments, the relative sizes of the liquid crystal module 110 and the photodetector 131 can be adjusted to achieve that the light receiving surface of one photodetector can cover the entire liquid crystal module 110. In this case, the photodetector 131 is attached and fixed to the liquid crystal module 110. In this way, there is no need to set a rotatable mounting frame when performing spectrum measurement, thereby further reducing the volume of the spectrometer 100.

[0051] Furthermore, a position detection sensor 123 may be provided to detect the position of the high-reflection film 117 of different light-transmitting bands during the rotation process, so that the measured light intensity corresponds to the light-transmitting band of the high-reflection film 117 .

[0052] Please refer again Figure 1 In some other embodiments of the present application, the detection module 130 includes a plurality of photodetectors 131, and the plurality of photodetectors 131 are arranged in one-to-one correspondence with the plurality of second conductive glasses 113 to obtain the light intensity of the corresponding outgoing light beam.

[0053] In this embodiment, a plurality of photodetectors 131 are provided to increase the speed of measurement.

[0054] It should be noted that the photodetector 131 is used to measure light intensity. The photodetector 131 can be one of the following types or a combination of several. A photoresistor, also known as a light guide, has a resistance value that changes with the intensity of the incident light. The resistance is high in a dark environment and significantly decreases under light. A photodiode is a semiconductor device that generates a photocurrent when light hits a PN junction. The magnitude of the current is proportional to the intensity of the incident light, so it can be used to measure light intensity. A photomultiplier tube has extremely high sensitivity to weak light signals. It converts received photons into electrical signals through the principle of electron multiplication and amplifies them to achieve accurate light intensity measurement. It is often used for low light level signal detection. Silicon photodiodes and avalanche photodiodes. Silicon photodiodes can measure light intensity over a wider wavelength range, while avalanche photodiodes use the internal avalanche effect to further amplify photogenerated carriers, thereby increasing sensitivity. Pyroelectric detectors are mainly used for light intensity measurement within the infrared spectrum. They work based on the pyroelectric effect, that is, the temperature change caused by the absorption of infrared radiation by the material causes a change in the surface charge distribution. Photoconductive detectors, whose resistivity decreases with increasing light, can be used to quantify light intensity based on this principle. Four-quadrant photodetectors, a specially designed detector that can simultaneously measure the position and intensity of a light spot. Integrated optical sensors, such as certain CMOS image sensors and CCD arrays, can not only sense light intensity, but also perform two-dimensional image information acquisition, in which each pixel can be used as a light intensity measurement unit.

[0055] Please refer to Figure 1 , Figure 2 and Figure 3 In this embodiment, the high reflection film 117 is disposed on the inner side of the first conductive glass 111 and the second conductive glass 113. That is, the high reflection film 117 is disposed on the side of the first conductive glass 111 and the second conductive glass 113 close to the liquid crystal material 115. This facilitates the formation of a reflected light beam to better form an interference effect.

[0056] Please refer to Figure 1 , Figure 2 and Figure 3 In this embodiment, the wavelength bands of light transmitted through the multiple high-reflection films 117 disposed on the multiple first conductive glasses 111 partially overlap in pairs, and the wavelength bands of light transmitted through the multiple high-reflection films 117 disposed on the multiple second conductive glasses 113 partially overlap in pairs.

[0057] It should be noted that the partial overlap of the wavelength bands of the transmittance light of the high-reflection film 117 provided on the first conductive glass 111 and the second conductive glass 113 can be understood as the lower limit of the preset transmittance wavelength range of the high-reflection film 117 provided on the liquid crystal units formed corresponding to the first conductive glass 111 and the second conductive glass 113 and the upper limit of the preset transmittance wavelength range of the high-reflection film 117 provided on the liquid crystal material 115 of another first conductive glass 111 and the second conductive glass 113 have an overlapping area, thereby forming a continuous measurement band as a whole.

[0058] In this embodiment, the wavelength range of the light that can be transmitted through all the high-reflection films 117 is 400nm-1700nm, and the measurable wavelength range of the formed spectrometer 100 is 400nm-1700nm. That is, the liquid crystal module 110 can achieve the measurement of the wavelength range of 400nm-1700nm. For example, in an optional embodiment, the liquid crystal module 110 has 16 first conductive glasses 111 and corresponding 16 second conductive glasses 113, wherein: the wavelength range of the light that can be transmitted through the high-reflection film 117 set on the corresponding first first conductive glass 111 and second conductive glass 113 is 400nm-500nn;

[0059] The wavelength band of the light that can be transmitted by the high-reflection film 117 disposed on the corresponding second first conductive glass 111 and the second conductive glass 113 is 475-575nm;

[0060] The wavelength band of the light that can be transmitted by the high-reflection film 117 disposed on the corresponding third first conductive glass 111 and the second conductive glass 113 is 550-650nm;

[0061] The wavelength band of the light that can be transmitted by the high-reflection film 117 disposed on the corresponding fourth first conductive glass 111 and the second conductive glass 113 is 625nm-725nm;

[0062] The wavelength band of the light that can be transmitted by the high-reflection film 117 disposed on the corresponding fifth first conductive glass 111 and the second conductive glass 113 is 700nm-800nm;

[0063] The wavelength band of the light that can be transmitted by the high-reflection film 117 disposed on the corresponding sixth first conductive glass 111 and the second conductive glass 113 is 775nm-875nm;

[0064] The wavelength band of the light that can be transmitted by the high-reflection film 117 disposed on the corresponding seventh first conductive glass 111 and second conductive glass 113 is 850nm-950nm;

[0065] The wavelength band of the light that can be transmitted by the high-reflection film 117 disposed on the corresponding eighth first conductive glass 111 and the second conductive glass 113 is 925nm-1025nm;

[0066] The wavelength band of the light that can be transmitted by the high reflection film 117 disposed on the corresponding ninth first conductive glass 111 and the second conductive glass 113 is 1000nm-1200nm;

[0067] The wavelength band of the light that can be transmitted by the high-reflection film 117 disposed on the corresponding tenth first conductive glass 111 and the second conductive glass 113 is 1175nm-1275nm;

[0068] The wavelength band of the light that can be transmitted by the high reflection film 117 disposed on the corresponding eleventh first conductive glass 111 and the second conductive glass 113 is 1250nm-1350nm;

[0069] The wavelength band of the light that can be transmitted by the high-reflection film 117 disposed on the corresponding twelfth first conductive glass 111 and the second conductive glass 113 is 1325nm-1425nm;

[0070] The wavelength band of the light that can be transmitted by the high-reflection film 117 disposed on the corresponding thirteenth first conductive glass 111 and the second conductive glass 113 is 1400nm-1500nm;

[0071] The wavelength band of the light that can be transmitted by the high-reflection film 117 disposed on the corresponding fourteenth first conductive glass 111 and the second conductive glass 113 is 1475nm-1575nm;

[0072] The wavelength band of the light that can be transmitted by the high reflection film 117 disposed on the corresponding ninth and fifteenth first conductive glasses 111 and second conductive glasses 113 is 1550nm-1650nm;

[0073] The wavelength band of the light that can be transmitted by the high reflection film 117 disposed on the corresponding sixteenth first conductive glass 111 and the second conductive glass 113 is 1625nm-1700nm.

[0074] It should be noted that the specific band value range can be set according to the number and requirements of the first conductive glass 111 and the second conductive glass 113. The above is only one implementation method. Of course, in some embodiments of the present application, unequal intervals can also be used, as long as the overall band coverage is sufficient.

[0075] In this embodiment, the high reflective film 117 is a multi-layer dielectric film, which is convenient for achieving high reflectivity in a specific band. Other bands will be filtered out. This multi-layer dielectric film can achieve high reflectivity and interference effect in a specific band.

[0076] Please refer to Figure 1 , Figure 2 and Figure 3 In this embodiment, the first conductive glass 111 and the second conductive glass 113 are both ITO conductive glass. ITO conductive glass has high permeability while meeting the requirement of conductivity.

[0077] In summary, the working principle and beneficial effects of the spectrometer 100 provided by the embodiment of the utility model include:

[0078] The liquid crystal module 110 of this embodiment includes a plurality of first conductive glasses 111, a plurality of second conductive glasses 113, and a liquid crystal material 115. The plurality of first conductive glasses 111 and the plurality of second conductive glasses 113 correspond to each other and are arranged in parallel. The liquid crystal material 115 is encapsulated between the first conductive glasses 111 and the second conductive glasses 113 arranged in parallel. Since the liquid crystal material 115 has an electro-optical effect. Different voltages are applied to the first conductive glasses 111 and the second conductive glasses 113. When the external voltage acts on the liquid crystal material 115, the arrangement of the liquid crystal molecules is changed, so that the effective refractive index of the liquid crystal material 115 is changed, thereby controlling the transmittance, reflectivity or scattering degree of the light waves passing through the liquid crystal molecules. High-reflection films 117 with different light-transmitting bands are arranged on the plurality of first conductive glasses 111, and high-reflection films 117 corresponding to the light-transmitting bands of the high-reflection films 117 on the first conductive glasses 111 are arranged on all the second conductive glasses 113. Since the high-reflection film 117 has a high reflectivity, it can allow light of a preset wavelength to pass through. The high-reflection film 117 on the first conductive glass 111 and the high-reflection film 117 on the second conductive glass 113 cooperate to select light of a desired wavelength band to pass through. In this way, different wavelength bands of light entering from the light input side are selectively transmitted through the liquid crystal module 110 through the high-reflection film 117 with corresponding light-transmitting wavelength bands and the corresponding area of ​​the liquid crystal material 115 to illuminate the detection module 130, thereby realizing multi-band or even full-band spectrum measurement. The spectrometer 100 of the present application also has the advantages of small size and easy manufacturing.

[0079] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A spectrometer, characterized in that: It comprises a liquid crystal module and a detection module arranged on the light-emitting side of the liquid crystal module, wherein the detection module is used to obtain the light intensity of the light beam emitted from the light-emitting side of the liquid crystal module; The liquid crystal module comprises a plurality of first conductive glasses, a plurality of second conductive glasses and a liquid crystal material, wherein the plurality of first conductive glasses and the plurality of second conductive glasses correspond to each other and are arranged in parallel, and the liquid crystal material is encapsulated between the first conductive glasses and the second conductive glasses arranged in parallel, and different voltages are applied to the first conductive glasses and the second conductive glasses, so that the liquid crystal material has a refractive index corresponding to the voltages; High-reflective films with different light-transmitting bands are arranged on the plurality of first conductive glasses; The high-reflection films corresponding to the high-reflection films on the first conductive glass are arranged on the plurality of the second conductive glasses; The high-reflection film on the first conductive glass and the high-reflection film on the second conductive glass cooperate to select light of a desired wavelength band to pass through; Under the action of the liquid crystal material and the high-reflection film, light of a preset wavelength band in the incident light beam can selectively pass through the liquid crystal module to illuminate the detection module.

2. The spectrometer according to claim 1, characterized in that The liquid crystal module further includes packaging glue; The first conductive glass and the second conductive glass are packaged together by the packaging glue in a one-to-one correspondence, a sealed cavity is formed between the first conductive glass and the second conductive glass, and the liquid crystal material is arranged in the sealed cavity. The plurality of first conductive glasses are in the same plane and arranged in an array; The plurality of the second conductive glasses are in the same plane and arranged in an array; The liquid crystal module further comprises a plurality of driving modules, each of which is electrically connected to a group of the first conductive glass and one of the second conductive glasses which are arranged opposite to each other.

3. The spectrometer according to claim 1, characterized in that A plurality of the first conductive glasses are sequentially connected to each other to form a whole piece of conductive glass; A plurality of the second conductive glasses are sequentially connected to each other to form a whole piece of conductive glass; A whole block of conductive glass formed by a plurality of the first conductive glasses and a whole block of conductive glass formed by a plurality of the second conductive glasses are packaged together by packaging glue, a sealed cavity is formed between the whole block of conductive glass formed by a plurality of the first conductive glasses and the whole block of conductive glass formed by a plurality of the second conductive glasses, and the liquid crystal material is arranged in the sealed cavity; The liquid crystal module further includes a driving module, and the driving module is electrically connected to a whole block of conductive glass formed by a plurality of first conductive glasses and a whole block of conductive glass formed by a plurality of second conductive glasses.

4. The spectrometer according to any one of claims 1 to 3, characterized in that: The detection module includes a photoelectric detector, and the photoelectric detector is arranged corresponding to all the second conductive glasses to obtain the light intensity of the outgoing light beam.

5. The spectrometer according to any one of claims 1 to 3, characterized in that: The detection module includes a plurality of photoelectric detectors, and the plurality of photoelectric detectors are arranged in one-to-one correspondence with the plurality of second conductive glasses to obtain the light intensity of the corresponding outgoing light beam.

6. The spectrometer according to any one of claims 1 to 3, characterized in that: The high reflective film is arranged on the inner sides of the first conductive glass and the second conductive glass.

7. The spectrometer according to any one of claims 1 to 3, characterized in that: The wavelength bands of light that can be transmitted through the multiple high-reflection films set on the multiple first conductive glasses partially overlap in pairs, and the wavelength bands of light that can be transmitted through the multiple high-reflection films set on the multiple second conductive glasses partially overlap in pairs.

8. The spectrometer according to any one of claims 1 to 3, characterized in that: The high reflective film is a multi-layer dielectric film.

9. The spectrometer according to any one of claims 1 to 3, characterized in that: The wavelength range of the light that can be transmitted by the high-reflection film is 400nm-1700nm.

10. The spectrometer according to any one of claims 1 to 3, characterized in that: The first conductive glass and the second conductive glass are both ITO conductive glass.

Images