Fiber optic spectrometer with multi-channel detector

Abstract

The utility model discloses a fiber optic spectrometer with a multichannel detector, and belongs to the technical field of spectrometers. The optical fiber spectrometer with the multi-channel detector comprises the detector, a plurality of signal transmission circuits, a plurality of bias voltage circuits, a plurality of feedback units and a controller, and the plurality of bias voltage circuits output corresponding bias voltage values to the plurality of signal transmission circuits respectively so as to adjust working points of the plurality of signal transmission circuits respectively. Therefore, the deviation among analog quantities output by a plurality of different channels of the detector is reduced, and the authenticity of acquired data can be improved. Moreover, the plurality of feedback units can monitor the output voltages of the plurality of bias voltage circuits in a one-to-one correspondence manner, and when the voltage values output by the corresponding bias voltage circuits have deviation, the controller can calibrate the output values of the bias voltage circuits by adjusting the digital quantity used for controlling the bias voltage circuits. The stability of the output voltage of the bias voltage circuits is improved.

Description

Technical Field

[0001] This utility model relates to the field of spectrometer technology, and in particular to a fiber optic spectrometer with a multi-channel detector. Background Technology

[0002] A fiber optic spectrometer is a device that measures the intensity of spectral lines at different wavelengths using a photodetector. Its working principle is based on the properties of light absorption, reflection, and transmission by a substance, converting optical signals into electrical signals for measurement. A fiber optic spectrometer with multi-channel detectors is a spectroscopic instrument capable of simultaneously measuring multiple wavelengths. It obtains the absorption, reflection, or emission spectral information of an object or sample at different wavelengths by dividing the incident light into different frequency bands and using multiple channels for detection.

[0003] However, the analog outputs of different channels of the detector in a fiber optic spectrometer with a multi-channel detector may have certain deviations, resulting in deviations in the data acquired by the multiple channels of the fiber optic spectrometer with a multi-channel detector. Utility Model Content

[0004] This invention provides a fiber optic spectrometer with a multi-channel detector. It solves the problem of data discrepancies arising from multiple channels acquired in existing fiber optic spectrometers with multi-channel detectors. The technical solution is as follows:

[0005] The fiber optic spectrometer with a multi-channel detector includes: a detector, multiple signal transmission circuits, multiple bias voltage circuits, multiple feedback units, and a controller.

[0006] The input terminals of the plurality of signal transmission circuits are all electrically connected to the detector, and the output terminals of the plurality of signal transmission circuits are all electrically connected to the controller.

[0007] The input terminals of the plurality of bias voltage circuits are all electrically connected to the controller, and the plurality of bias voltage circuits correspond one-to-one with the plurality of signal transmission circuits. The output terminal of the bias voltage circuit is electrically connected to the corresponding signal transmission circuit.

[0008] The plurality of feedback units correspond one-to-one with the plurality of bias voltage circuits. The input terminal of each feedback unit is electrically connected to the corresponding bias voltage circuit, and the output terminal of each feedback unit is electrically connected to the controller.

[0009] Optionally, the signal transmission circuit includes an operational amplifier circuit and a first analog-to-digital converter;

[0010] The input terminal of the operational amplifier circuit is electrically connected to the detector, and the output terminal of the operational amplifier circuit is electrically connected to the input terminal of the first analog-to-digital converter.

[0011] The output of the first analog-to-digital converter is electrically connected to the controller.

[0012] Optionally, the bias voltage circuit includes a digital-to-analog converter;

[0013] The input terminal of the digital-to-analog converter is electrically connected to the controller, and the output terminal of the digital-to-analog converter is electrically connected to the operational amplifier circuit.

[0014] Optionally, the bias voltage circuit further includes a first voltage follower circuit;

[0015] The input terminal of the first voltage follower circuit is electrically connected to the output terminal of the digital-to-analog converter, and the output terminal of the first voltage follower circuit is electrically connected to the operational amplifier circuit.

[0016] Optionally, the feedback unit includes a second analog-to-digital converter;

[0017] The input terminal of the second analog-to-digital converter is electrically connected to the output terminal of the digital-to-analog converter, and the output terminal of the second analog-to-digital converter is electrically connected to the controller.

[0018] Optionally, the feedback unit further includes a second voltage follower circuit;

[0019] The input terminal of the second voltage follower circuit is electrically connected to the output terminal of the digital-to-analog converter, and the output terminal of the second voltage follower circuit is electrically connected to the second analog-to-digital converter.

[0020] Optionally, the operational amplifier circuit includes a first amplifier circuit and a second amplifier circuit;

[0021] The input terminal of the first amplifier circuit is electrically connected to the output terminal of the detector, and the output terminal of the first amplifier circuit is electrically connected to the first analog-to-digital converter.

[0022] The input terminal of the second amplifier circuit is electrically connected to the output terminal of the first voltage follower circuit, and the output terminal of the second amplifier circuit is electrically connected to the first analog-to-digital converter.

[0023] Optionally, the operational amplifier circuit further includes a differential amplifier circuit and a third voltage follower circuit;

[0024] The two input terminals of the differential amplifier circuit are electrically connected to the output terminals of the first amplifier circuit and the second amplifier circuit, respectively, and the output terminal of the differential amplifier circuit is electrically connected to the input terminal of the third voltage follower circuit.

[0025] The output of the third voltage follower circuit is electrically connected to the first analog-to-digital converter.

[0026] Optionally, the fiber optic spectrometer with a multi-channel detector further includes a power supply circuit, which is electrically connected to the detector and the controller.

[0027] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:

[0028] A fiber optic spectrometer with a multi-channel detector is provided, comprising a detector, multiple signal transmission circuits, multiple bias voltage circuits, multiple feedback units, and a controller. The multiple bias voltage circuits output corresponding bias voltage values ​​to the multiple signal transmission circuits, thereby adjusting the operating points of each circuit and reducing the deviation between the analog outputs of different channels of the detector, thus improving the accuracy of the acquired data. Furthermore, the multiple feedback units can monitor the output voltages of the multiple bias voltage circuits one-to-one. When a deviation exists in the output voltage value of a corresponding bias voltage circuit, the controller can adjust the digital values ​​used to control the bias voltage circuits to calibrate the output values, improving the stability of the output voltages of the multiple bias voltage circuits. This solves the problem of data deviation in multi-channel fiber optic spectrometers with multi-channel detectors in related technologies, achieving the effect of improving the accuracy of data acquired from multiple channels of the fiber optic spectrometer with a multi-channel detector. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a circuit connection diagram of a fiber optic spectrometer with a multi-channel detector, as shown in an embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram of the connection structure of a bias voltage circuit and a feedback unit provided in an embodiment of this utility model;

[0032] Figure 3 This is a schematic diagram of the structure of a controller provided in an embodiment of the present utility model;

[0033] Figure 4 This is a schematic diagram of an operational amplifier circuit provided in an embodiment of the present invention. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0035] Although the present invention can be readily embodied in various forms, only some specific embodiments are shown in the accompanying drawings and will be described in detail in this specification. It is understood that this specification should be regarded as an exemplary illustration of the principles of the present invention and is not intended to limit the present invention to what is described herein.

[0036] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0037] Please refer to Figure 1 , Figure 1 This is a circuit connection diagram of a fiber optic spectrometer with a multi-channel detector, as shown in an embodiment of the present invention. The fiber optic spectrometer with a multi-channel detector may include: a detector 11, multiple signal transmission circuits 12, multiple bias voltage circuits 13, multiple feedback units 14, and a controller 15.

[0038] The input terminals of multiple signal transmission circuits 12 are all electrically connected to the detector 11, and the output terminals of multiple signal transmission circuits 12 are all electrically connected to the controller 15. For example, the detector 11 has two channels (channel 1 and channel 2), and the multiple signal transmission circuits 12 include a first signal transmission circuit 12 and a second signal transmission circuit 12. The input terminal of the first signal transmission circuit 12 is electrically connected to the detector 11, and its output terminal is electrically connected to the controller 15. The first signal transmission circuit 12 is used to transmit the optical signal output from channel 1 to the controller 15. The input terminal of the second signal transmission circuit 12 is electrically connected to the detector 11, and its output terminal is electrically connected to the controller 15. The second signal transmission circuit 12 is used to transmit the optical signal output from channel 2 to the controller 15. Any one of the signal transmission circuits 12 is used to receive the optical signal output from the channel of the detector 11, and after electrical conversion, transmits the received optical signal to the controller 15.

[0039] The input terminals of multiple bias voltage circuits 13 are all electrically connected to the controller 15. Each of the multiple bias voltage circuits 13 corresponds to a single signal transmission circuit 12. The output terminal of each bias voltage circuit 13 is electrically connected to the corresponding signal transmission circuit 12.

[0040] Any bias circuit is also used to input a bias voltage into the signal transmission circuit 12, so that the signal transmission circuit 12 operates at a specific operating point; the controller 15 is used to control the bias voltage output by the bias voltage circuit 13 according to the operating state of the signal transmission circuit 12, so as to adjust the operating point of the signal transmission circuit 12. In this way, the stable output characteristics of the signal transmission circuit 12 can be maintained, ensuring that the signal transmission circuit 12 can accurately transmit signals and realize effective information transmission.

[0041] Since the analog quantities output by the multiple different channels of detector 11 (that is, the analog data output by detector 11 under different lighting conditions) may have certain deviations, the data collected by different channels may also have certain deviations. Therefore, in this embodiment of the invention, multiple bias voltage circuits 13 output corresponding bias voltage values ​​to multiple signal transmission circuits 12 respectively, so as to adjust the operating point of multiple signal transmission circuits 12 respectively, thereby reducing the deviation between the analog quantities output by the multiple different channels of detector 11 and improving the authenticity of the collected data.

[0042] Multiple feedback units 14 correspond one-to-one with multiple bias voltage circuits 13. The input terminal of the feedback unit 14 is electrically connected to the corresponding bias voltage circuit 13, and the output terminals of the multiple feedback units 14 are all electrically connected to the controller 15. For example, the controller 15 is also electrically connected to the detector 11. The controller 15 is used to send timing pulses required for the normal operation of the detector 11, and is also used to receive digital signals provided by the first signal transmission circuit 12 and the feedback units 14.

[0043] Any feedback unit 14 can be used to monitor the output voltage of the corresponding bias voltage circuit 13. When the output voltage value of the corresponding bias voltage circuit 13 deviates, the controller 15 can adjust the digital quantity used to control the bias voltage circuit 13 to calibrate the output value of the bias voltage circuit 13, ensuring the stability of the output voltage of each bias voltage circuit 13. That is, the feedback unit 14 can feed back the output signal of the bias voltage circuit 13 to the controller 15 in real time and compare it with the set value or expected value. When the output signal of the bias voltage circuit 13 deviates or is disturbed, the controller 15 will adjust according to the feedback signal, thereby ensuring that the bias voltage circuit 13 can operate stably in the expected state.

[0044] In summary, this utility model provides a fiber optic spectrometer with a multi-channel detector, comprising a detector 11, multiple signal transmission circuits 12, multiple bias voltage circuits 13, multiple feedback units 14, and a controller 15. The multiple bias voltage circuits 13 output corresponding bias voltage values ​​to the multiple signal transmission circuits 12, thereby adjusting the operating points of the multiple signal transmission circuits 12 and reducing the deviation between the analog outputs of the different channels of the detector 11, thus improving the accuracy of the acquired data. Furthermore, the multiple feedback units 14 can monitor the output voltages of the multiple bias voltage circuits 13 one-to-one. When a deviation exists in the output voltage value of a corresponding bias voltage circuit 13, the controller 15 can adjust the digital quantity used to control the bias voltage circuits 13 to calibrate the output value of the bias voltage circuits 13, improving the stability of the output voltages of the multiple bias voltage circuits 13. This solves the problem of data deviation in multiple channels acquired by fiber optic spectrometers with multi-channel detectors in related technologies, achieving the effect of improving the accuracy of data acquired by multiple channels of fiber optic spectrometers with multi-channel detectors.

[0045] Please refer to Figure 1 In one optional embodiment, any signal transmission circuit 12 may include an operational amplifier circuit and a first analog-to-digital converter ADC1; the input terminal of the operational amplifier circuit may be electrically connected to the detector 11, and the output terminal of the operational amplifier circuit may be electrically connected to the input terminal of the first analog-to-digital converter ADC1; the output terminal of the first analog-to-digital converter ADC1 may be electrically connected to the controller 15.

[0046] Any bias voltage circuit 13 includes a digital-to-analog converter (DAC); the input terminal of the DAC is electrically connected to the controller 15, and the output terminal of the DAC is electrically connected to the operational amplifier circuit.

[0047] Any feedback unit 14 may include a second analog-to-digital converter ADC2; the input terminal of the second analog-to-digital converter ADC2 is electrically connected to the output terminal of the digital-to-analog converter DAC, and the output terminal of the second analog-to-digital converter ADC2 is electrically connected to the controller 15.

[0048] The first analog-to-digital converter (ADC) converts the analog signal output from the operational amplifier (op-amp) circuit into a digital signal and transmits it to the controller 15. The op-amp circuit converts the analog signal output from the detector 11 into an analog signal within the voltage range that the first ADC1 can normally acquire. The bias voltage output by the digital-to-analog converter (DAC) is used to make the op-amp circuit operate at a specific operating point so that the op-amp circuit reaches its optimal operating state. The second ADC2 converts the bias voltage output by the DAC into a digital signal and feeds it back to the controller 15.

[0049] For example, an optical fiber spectrometer with a multi-channel detector includes an operational amplifier circuit 1, an operational amplifier circuit 2, a first analog-to-digital converter ADC1-1 (hereinafter referred to as ADC1-1), a first analog-to-digital converter ADC1-2 (hereinafter referred to as ADC1-2), a digital-to-analog converter DAC1 (hereinafter referred to as DAC1), a digital-to-analog converter DAC2 (hereinafter referred to as DAC2), a second analog-to-digital converter ADC2-1 (hereinafter referred to as ADC2-1), and a second analog-to-digital converter ADC2-2 (hereinafter referred to as ADC2-2).

[0050] The operational amplifier circuit 1 is used to convert the analog signal output from channel 1 of detector 11 into an analog signal within the voltage range that can be normally acquired by ADC1-1. ADC1-1 is used to convert the analog signal output from operational amplifier circuit 1 into a digital signal and transmit it to controller 15. The bias voltage output by DAC1 is used to make operational amplifier circuit 1 work at a specific operating point. ADC2-1 is used to monitor the output voltage of DAC1. When there is a deviation in the output value of DAC1, controller 15 can adjust the output value of DAC1.

[0051] Operational amplifier circuit 2 is used to convert the analog signal output from channel 2 of detector 11 into an analog signal within the voltage range that can be normally acquired by ADC1-2. ADC1-2 is used to convert the analog signal output from operational amplifier circuit 2 into a digital signal and transmit it to controller 15. The bias voltage output by DAC2 is used to make operational amplifier circuit 2 work at a specific operating point. ADC2-2 is used to monitor the output voltage of DAC2. When there is a deviation in the output value of DAC2, controller 15 can adjust the output value of DAC2.

[0052] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the connection structure of the bias voltage circuit 13 and the feedback unit 14 provided in an embodiment of this utility model. Please refer to it. Figure 3 , Figure 3 This is a schematic diagram of the structure of a controller 15 provided in an embodiment of the present invention. In this embodiment, the digital-to-analog converter may include a DAC7311IDCKR, which is a low-power, single-channel, voltage-output digital-to-analog converter. Both the first analog-to-digital converter and the second analog-to-digital converter may include an ADCS7476AIMFX / NOPB. The controller 15 may include an STM32F407VGT6.

[0053] In an optional embodiment, the bias voltage circuit 13 may further include a first voltage follower circuit U2; the input terminal of the first voltage follower circuit U2 is electrically connected to the output terminal of the digital-to-analog converter (DAC), and the output terminal of the first voltage follower circuit U2 is electrically connected to the operational amplifier circuit. The feedback unit 14 may further include a second voltage follower circuit U3; the input terminal of the second voltage follower circuit U3 is electrically connected to the output terminal of the DAC, and the output terminal of the second voltage follower circuit U3 is electrically connected to the second analog-to-digital converter (ADC2).

[0054] A voltage follower circuit (also known as a unity-gain amplifier, buffer amplifier, or isolation amplifier) ​​is a special type of operational amplifier circuit whose main characteristic is that its output voltage closely follows changes in the input voltage. Voltage follower circuits can act as buffers and isolate signals. Specifically, they can function as a buffer in signal transmission, ensuring accurate signal transmission. For example, in long-distance transmission, signals attenuate due to transmission losses; using a voltage follower circuit can amplify the signal and improve transmission quality. Voltage follower circuits can also isolate interference and noise in the circuit, protecting subsequent circuits from interference.

[0055] For example, both the first voltage follower circuit U2 and the second voltage follower circuit U3 may include LMV321IDBVR.

[0056] like Figure 2 and Figure 3 As shown, the controller 15 can control the output bias voltage of the digital-to-analog converter (DAC) through the SPI interface, and transmit the bias voltage to the first voltage follower circuit U2 and the second voltage follower circuit U3 respectively. The output terminal (VOUT) of the first voltage follower circuit U2 is electrically connected to the operational amplifier circuit, and the second voltage follower circuit U3 is connected to the second analog-to-digital converter (ADC2) through the resistor R2. The controller 15 obtains the voltage value collected by the second analog-to-digital converter (ADC2) through the SPI interface.

[0057] Please refer to Figure 4 , Figure 4 This is a schematic diagram of an operational amplifier circuit provided in an embodiment of the present invention. Optionally, the operational amplifier circuit includes a first amplifier circuit U6, a second amplifier circuit U7, a differential amplifier circuit U7.1, and a third voltage follower circuit U7.2. The input terminal of the first amplifier circuit U6 is electrically connected to the output terminal of the detector 11, and the output terminal of the first amplifier circuit U6 is electrically connected to the first analog-to-digital converter ADC1. The input terminal of the second amplifier circuit U7 is electrically connected to the output terminal of the first voltage follower circuit U2, and the output terminal of the second amplifier circuit U7 is electrically connected to the first analog-to-digital converter ADC1.

[0058] The two input terminals of the differential amplifier circuit U7.1 are electrically connected to the output terminals of the first amplifier circuit U6 and the second amplifier circuit U7, respectively. The output terminal of the differential amplifier circuit U7.1 is electrically connected to the input terminal of the third voltage follower circuit U7.2. The output terminal of the third voltage follower circuit U7.2 is electrically connected to the first analog-to-digital converter ADC1.

[0059] like Figure 4 As shown, the input terminal of the first amplifier circuit U6 is connected to the output terminal VCCD of the channel of the detector 11 (CCD), and the input terminal of the second amplifier circuit U7 is connected to the output terminal of the operational amplifier circuit (that is, the output terminal VOUT of the first voltage follower circuit U2). Among them, the differential amplifier circuit U7.1 can extract the useful differential signal and suppress common-mode noise, and the third voltage follower circuit U7.2 can protect the subsequent circuits from the influence of the input circuit. The combination of these circuits can improve the signal quality and stability.

[0060] For example, the first amplifier circuit U6 and the second amplifier circuit U7 may both include an LMV321IDBVR, and the differential amplifier circuit U7.1 and the third voltage follower circuit U7.2 may both include an LM358.

[0061] In this embodiment of the present invention, the bias voltage circuit 13, the feedback unit 14 and the operational amplifier circuit may each include multiple matching resistors (e.g., R1, R2, R3, R4, R5, R6, R7, R8 and R9). The matching resistors can be used to improve the signal matching on the amplifier, so as to reduce signal reflection and avoid signal oscillation.

[0062] Please refer to Figure 1 Optionally, the fiber optic spectrometer with a multi-channel detector further includes a power supply circuit 16, which is electrically connected to the detector 11 and the controller 15. The power supply circuit 16 supplies power to the controller 15, the detector 11, and the bias voltage circuit 13. The controller 15 may include at least one of a microcontroller and a CPLD.

[0063] In this invention, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0064] In the several embodiments provided by this utility model, it should be understood that the disclosed apparatus and method can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0065] The above description is only an optional embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fiber optic spectrometer with a multi-channel detector, characterized in that, include: The detector comprises multiple signal transmission circuits, multiple bias voltage circuits, multiple feedback units, and a controller. The input terminals of the plurality of signal transmission circuits are all electrically connected to the detector, and the output terminals of the plurality of signal transmission circuits are all electrically connected to the controller. The input terminals of the plurality of bias voltage circuits are all electrically connected to the controller, and the plurality of bias voltage circuits correspond one-to-one with the plurality of signal transmission circuits. The output terminal of the bias voltage circuit is electrically connected to the corresponding signal transmission circuit. The plurality of feedback units correspond one-to-one with the plurality of bias voltage circuits. The input terminal of each feedback unit is electrically connected to the corresponding bias voltage circuit, and the output terminal of each feedback unit is electrically connected to the controller.

2. The fiber optic spectrometer with a multi-channel detector according to claim 1, characterized in that, The signal transmission circuit includes an operational amplifier circuit and a first analog-to-digital converter; The input terminal of the operational amplifier circuit is electrically connected to the detector, the output terminal of the operational amplifier circuit is electrically connected to the input terminal of the first analog-to-digital converter, and the operational amplifier circuit is also electrically connected to the bias voltage circuit. The output of the first analog-to-digital converter is electrically connected to the controller.

3. The fiber optic spectrometer with a multi-channel detector according to claim 2, characterized in that, The bias voltage circuit includes a digital-to-analog converter; The input terminal of the digital-to-analog converter is electrically connected to the controller, and the output terminal of the digital-to-analog converter is electrically connected to the operational amplifier circuit.

4. The fiber optic spectrometer with a multi-channel detector according to claim 3, characterized in that, The bias voltage circuit also includes a first voltage follower circuit; The input terminal of the first voltage follower circuit is electrically connected to the output terminal of the digital-to-analog converter, and the output terminal of the first voltage follower circuit is electrically connected to the operational amplifier circuit.

5. The fiber optic spectrometer with a multi-channel detector according to claim 3, characterized in that, The feedback unit includes a second analog-to-digital converter; The input terminal of the second analog-to-digital converter is electrically connected to the output terminal of the digital-to-analog converter, and the output terminal of the second analog-to-digital converter is electrically connected to the controller.

6. The fiber optic spectrometer with a multi-channel detector according to claim 5, characterized in that, The feedback unit also includes a second voltage follower circuit; The input terminal of the second voltage follower circuit is electrically connected to the output terminal of the digital-to-analog converter, and the output terminal of the second voltage follower circuit is electrically connected to the second analog-to-digital converter.

7. The fiber optic spectrometer with a multi-channel detector according to claim 4, characterized in that, The operational amplifier circuit includes a first amplifier circuit and a second amplifier circuit; The input terminal of the first amplifier circuit is electrically connected to the output terminal of the detector, and the output terminal of the first amplifier circuit is electrically connected to the first analog-to-digital converter. The input terminal of the second amplifier circuit is electrically connected to the output terminal of the first voltage follower circuit, and the output terminal of the second amplifier circuit is electrically connected to the first analog-to-digital converter.

8. The fiber optic spectrometer with a multi-channel detector according to claim 7, characterized in that, The operational amplifier circuit also includes a differential amplifier circuit and a third voltage follower circuit; The two input terminals of the differential amplifier circuit are electrically connected to the output terminals of the first amplifier circuit and the second amplifier circuit, respectively, and the output terminal of the differential amplifier circuit is electrically connected to the input terminal of the third voltage follower circuit. The output of the third voltage follower circuit is electrically connected to the first analog-to-digital converter.

9. The fiber optic spectrometer with a multi-channel detector according to claim 1, characterized in that, The fiber optic spectrometer with a multi-channel detector also includes a power supply circuit, which is electrically connected to the detector and the controller.

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