Method and device for testing quantum efficiency of wide-band camera, and electronic equipment

Abstract

The present invention relates to the field of optical measurement and provides a method, device, and electronic device for testing the quantum efficiency of a wide-band camera. The method comprises: obtaining the number of incident photons received by a target camera, wherein the target camera is a wide-band camera to be tested, the number of incident photons being the number of incident photons generated when triggered by target monochromatic light, wherein the target monochromatic light is monochromatic light of a set wavelength; obtaining the number of response electrons generated by the target camera in response to the target monochromatic light; and calculating the quantum efficiency of the target camera corresponding to the target monochromatic light based on the number of incident photons and the number of response electrons. This method is used to address the defects of large errors and low repeatability in quantum efficiency testing of wide-band cameras in related technologies. The solution of the present application does not require pre-calibration of data, resulting in smaller errors and higher accuracy in each test.

Description

Technical Field

[0001] The present invention relates to the field of optical measurement technology, and in particular to a method and device for testing the quantum efficiency of a wide-band camera, and electronic equipment. Background Art

[0002] Quantum efficiency (QE) is a key parameter that describes the photoelectric conversion capability of optoelectronic devices. It is the ratio of the number of response electrons generated per unit time to the number of incident photons at a specific wavelength. Accurately testing the QE of optoelectronic systems is crucial for both system design and detector development.

[0003] Most related technologies use standard detectors such as silicon photodiodes to calibrate the quantum efficiency of cameras. That is, a light source is applied to the standard detector and the camera to be tested simultaneously, and then the output signals of each, that is, the number of photoelectrons generated, are collected. Since the quantum efficiency of the standard detector is pre-calibrated, the quantum efficiency of the standard detector under a specific wavelength of light can be determined through the corresponding calibration data. The quantum efficiency of the camera to be tested can then be calculated based on the size ratio of the output signals of the standard detector and the camera to be tested.

[0004] Although the above method is more convenient, it has high requirements for the accuracy of the calibration data of the standard detector. In addition, since the spectral range of the standard detector is limited, when the wavelength of the light source exceeds the calibration range of the standard detector, that is, when testing a wide-spectrum camera, multiple standard detectors are often required to be spliced ​​together for use. When splicing, different detectors need to go through a complex splicing process, and the calibration data of different detectors also need to go through complex calculations to be unified. The errors in the calculation process will be large, which will ultimately lead to large errors in the quantum efficiency test and low repeatability. Summary of the Invention

[0005] The present invention provides a method, device, and electronic device for testing the quantum efficiency of a wide-band camera, which are used to address the defects of large errors and low repeatability in the related art when testing the quantum efficiency of a wide-band camera. The solution of the present application does not require pre-calibration of data, and each test has smaller errors and higher accuracy.

[0006] The present invention provides a method for testing the quantum efficiency of a wide-band camera, comprising:

[0007] Obtaining the number of incident photons received by a target camera, where the target camera is a wide-band camera to be tested, and the number of incident photons is the number of incident photons generated by the target camera when triggered by target monochromatic light, where the target monochromatic light is monochromatic light of a set wavelength;

[0008] acquiring the number of response electrons generated by the target camera in response to the target monochromatic light;

[0009] The quantum efficiency of the target camera corresponding to the target monochromatic light is calculated based on the number of incident photons and the number of response electrons.

[0010] According to the method for performing quantum efficiency testing on a wide-band camera provided by the present invention, obtaining the number of incident photons received by the target camera includes:

[0011] Obtaining a spectrum curve corresponding to the target monochromatic light, wherein the abscissa of the spectrum curve is the wavelength of the target monochromatic light, and the ordinate is the irradiance of the target monochromatic light;

[0012] Based on the spectral curve, the number of incident photons received by the target camera is determined.

[0013] According to the method for performing quantum efficiency testing on a wide-band camera provided by the present invention, obtaining the number of response electrons generated by the target camera in response to the target monochromatic light includes:

[0014] determining a first output voltage generated by the target camera in response to the target monochromatic light;

[0015] determining a second output voltage generated by the target camera when not irradiated by the light source;

[0016] The number of response electrons generated by the target camera in response to the target monochromatic light is determined based on the first output voltage and the second output voltage.

[0017] According to the method for testing the quantum efficiency of a wide-band camera provided by the present invention, the quantum efficiency of the target monochromatic light is the quotient of the number of incident photons and the number of response electrons.

[0018] According to the method for performing quantum efficiency testing on a wide-band camera provided by the present invention, the target monochromatic light is generated by:

[0019] The primary monochromatic light generated by the monochromatic light source is filtered to obtain the secondary monochromatic light;

[0020] The secondary monochromatic light is converted into parallel uniform monochromatic light to obtain the target monochromatic light.

[0021] According to the method for testing the quantum efficiency of a wide-band camera provided by the present invention, the step of calculating the quantum efficiency of the target camera corresponding to the target monochromatic light further includes:

[0022] Changing the wavelength of the target monochromatic light and recalculating the quantum efficiency of the target camera;

[0023] A quantum efficiency curve of the target camera is generated based on the quantum efficiency of the target camera relative to a plurality of target monochromatic lights.

[0024] The present invention also provides a device for testing the quantum efficiency of a wide-band camera, comprising:

[0025] A control unit, configured to implement any of the above methods for performing quantum efficiency testing on a wide-band camera;

[0026] The monochromatic light generating unit is used to generate target monochromatic light.

[0027] According to the device for performing quantum efficiency testing on a wide-band camera provided by the present invention, the monochromatic light generating unit includes:

[0028] A monochromatic light source, configured to generate primary monochromatic light, wherein the primary monochromatic light includes monochromatic light of a set wavelength and a secondary spectrum;

[0029] A filter, used to filter out the secondary spectrum in the primary monochromatic light;

[0030] The collimator is used to convert the primary monochromatic light into uniform monochromatic light to obtain the target monochromatic light.

[0031] The device for performing quantum efficiency testing on a wide-band camera provided by the present invention further includes a fiber optic spectrometer;

[0032] The fiber optic spectrometer is used to generate a spectrum curve based on the target monochromatic light.

[0033] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, any of the above-described methods for performing quantum efficiency testing on a wide-band camera is implemented.

[0034] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the computer program implements any of the above-mentioned methods for performing quantum efficiency testing on a wide-spectrum camera.

[0035] The present invention also provides a computer program product, comprising a computer program, which implements any of the above-mentioned methods for performing quantum efficiency testing on a wide-spectrum camera when executed by a processor.

[0036] In the method for performing quantum efficiency testing on a wide-band camera provided by the present invention, the quantum efficiency of the target camera can be calculated by applying two data, namely the number of incident photons and the number of response electrons. Both the number of incident photons and the number of response electrons are obtained based on monochromatic light of a set wavelength, that is, no pre-calibration data is required. The advantage of obtaining the number of incident electrons and the number of response electrons in each test is that it has a wider range of applicability. Quantum efficiency testing can also be performed on wide-band cameras without worrying about exceeding the calibration range. Compared with the quantum efficiency testing method of the related art that uses calibration data to determine the quantum efficiency of the target camera according to a proportion, the method of the present application has smaller errors and higher accuracy. The purpose of using monochromatic light is to perform a separate quantum efficiency test for each wavelength of light, avoid interference between light of different wavelengths, and further improve the accuracy of the quantum efficiency test. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 1 is a flow chart of a method for performing quantum efficiency testing on a wide-band camera provided by an embodiment of the present invention;

[0039] Figure 2 is a schematic diagram of a secondary spectrum provided by an embodiment of the present invention;

[0040] Figure 3 1 is a schematic structural diagram of a device for performing quantum efficiency testing on a wide-band camera provided by an embodiment of the present invention;

[0041] Figure 4 It is a schematic diagram of the physical structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0043] Figure 1 The figure is a flow chart of a method for performing quantum efficiency testing on a wide-band camera provided by an embodiment of the present invention.

[0044] like Figure 1 As shown, this embodiment provides a method for testing the quantum efficiency of a wide-band camera, including:

[0045] Step 101: Acquire the number of incident photons received by a target camera, where the target camera is a wide-band camera to be tested, and the number of incident photons is the number of incident photons generated by the target camera when triggered by target monochromatic light, where the target monochromatic light is monochromatic light of a set wavelength.

[0046] In practical applications, the target camera can be a wide-band camera to be tested. For example, it can be a wide-band area array camera. The area array camera can realize pixel matrix shooting. For the area array camera, the details of the captured image are not determined by the number of pixels, but by the resolution. Furthermore, the resolution is determined by the focal length of the lens. The corresponding to the area array camera is a line array camera. The measured field of view of the line array camera is a long and thin strip, and the requirements for field of view and accuracy are high. Therefore, the application range of the line array camera is relatively small. The quantum efficiency test method provided in this application can be applied to both area array cameras and line array cameras.

[0047] In implementation, the target monochromatic light may be uniform monochromatic light, that is, light of a uniform single wavelength. The target monochromatic light may be generated by:

[0048] The primary monochromatic light generated by the monochromatic light source is filtered to obtain the secondary monochromatic light;

[0049] The secondary monochromatic light is converted into parallel uniform monochromatic light to obtain the target monochromatic light.

[0050] Specifically, light can be generated by a light source such as a halogen lamp, and processed by an instrument such as a monochromator to generate monochromatic light of a specific wavelength, that is, monochromatic light. However, according to the following grating equation (1), monochromatic light will have spectral overlap during the diffraction process, that is, the diffraction angles of light of different wavelengths and different orders are the same. In other words, when the monochromator outputs monochromatic light of a specified wavelength, it will produce the following: Figure 2 The secondary spectrum at one-half the wavelength of the specific wavelength shown, Figure 2 In the example, when the specific wavelength output by the monochromator is 1500 nanometers, its output will include a secondary spectrum with a wavelength of 750 nanometers. The presence of the secondary spectrum will reduce the accuracy of the quantum efficiency measurement results. Therefore, in this embodiment, the primary monochromatic light can be filtered to filter out the existing secondary spectrum, thereby improving the accuracy of the quantum efficiency measurement.

[0051] dsinθ=mλ,m=0,±1,±2,... (1)

[0052] Where d is the grating constant, also known as the slit distance, θ is the diffraction angle, m is the spectral order, and λ is the incident wavelength.

[0053] Subsequently, converting the secondary monochromatic light into parallel uniform monochromatic light allows each pixel of the area array camera to receive uniform incident light, which can more accurately calculate the number of response electrons, thereby improving the accuracy of quantum efficiency measurement.

[0054] In practical applications, obtaining the number of incident photons received by the target camera includes:

[0055] Obtain the spectrum curve corresponding to the target monochromatic light. The horizontal coordinate of the spectrum curve is the wavelength of the target monochromatic light, and the vertical coordinate is the irradiance of the target monochromatic light. The irradiance coordinate is W / m 2 ;

[0056] Based on the spectral curve, the number of incident photons received by the target camera is determined.

[0057] Based on the spectral curve, the number of incident photons received by the target camera is determined to conform to the following formula (2):

[0058]

[0059] Among them, μ p (λ) is the number of incident photons, L(λ) is the irradiance of the monochromatic light, T int is the integration time of the prime target camera, S is the area of ​​each pixel of the target camera, τ is the window transmittance of the target camera, and h is the Planck constant 6.626×10 -34 J / s, c is the speed of light 3×10 8 m / s, λ is the wavelength of the monochromatic light.

[0060] Step 102, obtaining the number of response electrons generated by the target camera in response to the target monochromatic light;

[0061] In practical applications, the number of response electrons can be obtained as follows:

[0062] Step S1, determining a first output voltage generated by the target camera in response to the target monochromatic light;

[0063] Step S2, determining a second output voltage generated by the target camera when not receiving irradiation from the light source;

[0064] Step S3: determining the number of response electrons generated by the target camera in response to the target monochromatic light based on the first output voltage and the second output voltage.

[0065] The method for calculating the output voltage of the target camera in step S1 and step S2 complies with the following formula (3):

[0066] V=DN×K (3)

[0067] Where DN is the average DN value of several pixels in the center of the digital image output by the area array camera to be tested, and K is the conversion gain of the camera;

[0068] Step S3 complies with the following formula (4):

[0069]

[0070] Among them, μ e (λ) is the number of response electrons, V out is the first output voltage, V dark is the second output voltage, C int is the target camera integration capacitance, and q is the electron charge.

[0071] As can be determined from the above formula (2), in this embodiment, the first output voltage is subtracted from the second output voltage. This can eliminate the output voltage naturally generated when the camera is in a dark background without being illuminated by a light source, thereby avoiding its influence on the first output voltage. As a result, the calculated number of response electrons is completely generated by the target camera based on the target monochromatic light, thereby improving the accuracy of the quantum efficiency test.

[0072] Step 103 : Calculate the quantum efficiency of the target camera corresponding to the target monochromatic light based on the number of incident photons and the number of response electrons.

[0073] The quantum efficiency of the target monochromatic light is the quotient of the number of incident photons and the number of response electrons, which conforms to the following formula (5):

[0074]

[0075] At the same time, the method of using a standard detector to test quantum efficiency in related technologies is to use a monochromatic light source of a specific wavelength to illuminate the standard detector and the camera to be tested at the same time, and then obtain the output signal of the standard detector, that is, the number of response electrons S. std (λ), and obtain the output signal of the camera to be tested, that is, the number of response electrons S cam (λ), according to the quantum efficiency curve of the standard detector pre-calibrated, the quantum efficiency of the standard detector at a specific wavelength can be determined as QE std (λ), the quantum efficiency QE of the camera under test can be calculated by the following formula (6): cam (λ):

[0076]

[0077] In the method for performing quantum efficiency testing on a wide-band camera provided in this embodiment, the quantum efficiency of the target camera can be calculated using two data sets: the number of incident photons and the number of response electrons. Both the number of incident photons and the number of response electrons are obtained based on monochromatic light of a set wavelength. That is, no pre-calibration data is required. The advantage of obtaining the number of incident electrons and the number of response electrons for each test is that it has a wider applicability. Quantum efficiency testing can also be performed on wide-band cameras without worrying about exceeding the calibration range. Compared to the related art method of using calibration data to determine the quantum efficiency of the target camera according to a ratio, the method of the present application has smaller errors and higher accuracy. The purpose of using monochromatic light is to perform a separate quantum efficiency test for each wavelength of light, avoid interference between light of different wavelengths, and further improve the accuracy of the quantum efficiency test.

[0078] In an exemplary embodiment, after step 103, the method further includes:

[0079] Changing the wavelength of the target monochromatic light and recalculating the quantum efficiency of the target camera;

[0080] A quantum efficiency curve of the target camera is generated based on the quantum efficiency of the target camera relative to a plurality of target monochromatic lights.

[0081] In this embodiment, the wavelength of the monochromatic light can be adjusted according to a certain step length, and then quantum efficiency tests are performed on monochromatic lights of different wavelengths. For example, if the wavelength range of the target camera is 400-2500 nanometers, monochromatic lights of different wavelengths can be provided with a step length of 100 nanometers to perform quantum efficiency tests on the target camera. That is, monochromatic light with a wavelength of 400 nanometers can be provided to perform quantum efficiency tests on the target camera, as can monochromatic light with a wavelength of 500 nanometers, as well as monochromatic light with a wavelength of 600 nanometers, and so on, until monochromatic light with a wavelength of 2500 nanometers is provided to perform quantum efficiency tests on the target camera. In actual applications, the step length can also be 10 nanometers. The step length can be adjusted according to actual needs and is not limited here. The smaller the step length, the higher the accuracy of the generated quantum efficiency curve, and the more it can reflect the actual quantum efficiency of the target camera.

[0082] The following describes an apparatus for performing quantum efficiency testing on a wide-band camera provided by the present invention. The apparatus for performing quantum efficiency testing on a wide-band camera described below and the method for performing quantum efficiency testing on a wide-band camera described above can be referenced to each other.

[0083] Figure 34 is a schematic structural diagram of an apparatus for performing quantum efficiency testing on a wide-band camera provided by an embodiment of the present invention.

[0084] like Figure 3 As shown, the device for performing quantum efficiency testing on a wide-band camera provided by the present invention includes:

[0085] A control unit, configured to implement the method for performing quantum efficiency testing on a wide-band camera as described in any of the above embodiments;

[0086] The monochromatic light generating unit is used to generate target monochromatic light.

[0087] Wherein, the monochromatic light generating unit includes:

[0088] A monochromatic light source, configured to generate primary monochromatic light, wherein the primary monochromatic light includes monochromatic light of a set wavelength and a secondary spectrum;

[0089] A filter, used to filter out the secondary spectrum in the primary monochromatic light;

[0090] The collimator is used to convert the primary monochromatic light into uniform monochromatic light to obtain the target monochromatic light.

[0091] In practical applications, it also includes fiber optic spectrometers;

[0092] The fiber optic spectrometer is used to generate a spectrum curve based on the target monochromatic light.

[0093] In practical applications, a monochromatic light source may include a light source and a monochromator, where the light source may be a halogen lamp or other light source, and the monochromator selects and outputs monochromatic light of a specified wavelength from the light waves emitted by the light source. Generally speaking, the working principle of a monochromator is to disperse the incident composite light into separate wavelengths through a diffraction grating, and then use the different angles at which each wavelength of light leaves the grating to form an image at the exit slit by a focusing reflector, thereby achieving the purpose of generating monochromatic light.

[0094] The fiber optic spectrometer can be equipped with a detector to capture the light intensity distribution within the spectral range. Each pixel of the detector corresponds to a specific wavelength and can convert the light intensity signal into an electrical signal. The fiber optic spectrometer can first collect data based on the detector, that is, convert the detected light intensity signal into an electrical signal. After that, background subtraction, noise reduction through filtering algorithms, light intensity value normalization and other data processing operations can be performed. The processed data will be plotted as a spectral curve according to the wavelength-intensity correspondence and output.

[0095] The following is a specific embodiment to illustrate the method for performing quantum efficiency testing on a wide-band camera provided by the solution of the present application.

[0096] Taking the short-wavelength 640×512 area array MCT camera with a response wavelength of 400 nm to 2500 nm as an example, its quantum efficiency curve is measured. The detector has an integral capacitance of 10 fF and a pixel area of ​​225 μm. 2 During the test, the integration time was set to 800us, the light source used by the monochromator was a halogen lamp, the fiber optic spectrometer used had a response band range of 350nm-3000nm, and the spectrum sampling bandwidth was 1nm;

[0097] Step 1: Control the monochromator to output monochromatic light of a specified wavelength;

[0098] First, the monochromator output wavelength is controlled to be the shortest response wavelength of the area array camera to be tested, and the monochromatic light output wavelength of the monochromator is set to 400nm.

[0099] Step 2: After passing through the filter and collimator, a uniform monochromatic light without secondary spectrum is obtained.

[0100] Step 3: Calculate the number of response electrons at the wavelength based on the response of the area array camera to be tested, and calculate the number of incident photons based on the response of the fiber optic spectrometer. Taking a wavelength of 400 nm as an example, calculate the quantum efficiency of the area array camera to be tested at this wavelength.

[0101] First, obtain the output voltage V of the area array camera under test at wavelength λ out , and the dark background output voltage V of the area array camera to be tested dark The output voltage of the area array camera to be tested is calculated as follows: V = DN × K, where DN is the average DN value of the 9 pixels in the center of the digital image output by the area array camera to be tested, and K is the conversion gain of the camera. In this embodiment, the conversion gain of the camera to be tested is 0.11mV / DN.

[0102] Then, calculate the number of response electrons of the area array camera under test at wavelength λ, and the calculation method is: Among them C int is the integral capacitor of the area array camera to be tested, which is 10fF, and q is the electron charge 1.6×10 -19 C, substitute the data to calculate μ e (400nm) = 61.38655;

[0103] Then, the spectrum curve output by the optical fiber spectrometer at wavelength λ is collected. The horizontal axis of the spectrum curve is wavelength and the vertical axis is irradiance, and the unit is W / m 2 , according to the spectrum curve output by the fiber spectrometer at wavelength λ, calculate the number of incident photons of the area array camera to be tested at wavelength λ. The calculation method is: Where L(λ) is the irradiance output by the fiber optic spectrometer at a wavelength of 400 nm, 0.175 mW / m 2 , T intis the integration time of the area array camera to be tested, 800us, and S is the area size of a single pixel of the area array camera to be tested, 225μm 2 , τ is the transmittance of the area array camera window to be tested, 92%, and h is the Planck constant, 6.626×10 -34 J / s, c is the speed of light 3×10 8 m / s, λ is the wavelength of the monochromatic light output by the monochromator, 400nm; the number of incident photons of the area array camera under test at a wavelength of 400nm is calculated to be μ p (400nm) = 118.9292711;

[0104] Finally, the quantum efficiency of the area array camera under test at wavelength λ is calculated as follows:

[0105] The quantum efficiency of the area array camera under test at a wavelength of 400nm is calculated as follows:

[0106] Step 4: Adjust the wavelength of the monochromatic light in a certain step, and measure the quantum efficiency of the area array camera under test at each wavelength according to the above steps to obtain a complete wide-spectrum quantum efficiency curve of the area array camera under test;

[0107] According to the above steps, the quantum efficiency of each point of the camera in the range of 400nm-2500nm is measured at a step of 10nm to obtain the complete quantum efficiency curve of the area array camera to be tested.

[0108] Figure 4 An example of a physical structure diagram of an electronic device is shown below. Figure 4 As shown, the electronic device may include: a processor 410, a communication interface 420, a memory 430, and a communication bus 440, wherein the processor 410, the communication interface 420, and the memory 430 communicate with each other via the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute a method for performing quantum efficiency testing on a wide-band camera, the method including:

[0109] Obtaining the number of incident photons received by a target camera, where the target camera is a wide-band camera to be tested, and the number of incident photons is the number of incident photons generated when triggered by target monochromatic light, where the target monochromatic light is monochromatic light of a set wavelength;

[0110] acquiring the number of response electrons generated by the target camera in response to the target monochromatic light;

[0111] The quantum efficiency of the target camera corresponding to the target monochromatic light is calculated based on the number of incident photons and the number of response electrons.

[0112] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0113] In another aspect, the present invention further provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can perform the method for performing quantum efficiency testing on a wide-spectrum camera provided by the above methods, which includes:

[0114] Obtaining the number of incident photons received by a target camera, where the target camera is a wide-band camera to be tested, and the number of incident photons is the number of incident photons generated when triggered by target monochromatic light, where the target monochromatic light is monochromatic light of a set wavelength;

[0115] acquiring the number of response electrons generated by the target camera in response to the target monochromatic light;

[0116] The quantum efficiency of the target camera corresponding to the target monochromatic light is calculated based on the number of incident photons and the number of response electrons.

[0117] In yet another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for performing quantum efficiency testing on a wide-band camera provided by the above methods is implemented, the method comprising:

[0118] Obtaining the number of incident photons received by a target camera, where the target camera is a wide-band camera to be tested, and the number of incident photons is the number of incident photons generated when triggered by target monochromatic light, where the target monochromatic light is monochromatic light of a set wavelength;

[0119] acquiring the number of response electrons generated by the target camera in response to the target monochromatic light;

[0120] The quantum efficiency of the target camera corresponding to the target monochromatic light is calculated based on the number of incident photons and the number of response electrons.

[0121] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units. That is, they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0122] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus the necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or certain parts of the embodiment.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for testing the quantum efficiency of a wide-band camera, characterized in that: include: Obtaining the number of incident photons received by a target camera, where the target camera is a wide-band camera to be tested, and the number of incident photons is the number of incident photons generated by the target camera when triggered by target monochromatic light, where the target monochromatic light is monochromatic light of a set wavelength; acquiring the number of response electrons generated by the target camera in response to the target monochromatic light; Calculating the quantum efficiency of the target camera corresponding to the target monochromatic light based on the number of incident photons and the number of response electrons; The obtaining of the number of incident photons received by the target camera includes: Obtaining a spectrum curve corresponding to the target monochromatic light, wherein the abscissa of the spectrum curve is the wavelength of the target monochromatic light, and the ordinate is the irradiance of the target monochromatic light; determining a number of incident photons received by the target camera based on the spectral curve; The obtaining of the number of response electrons generated by the target camera in response to the target monochromatic light comprises: determining a first output voltage generated by the target camera in response to the target monochromatic light; determining a second output voltage generated by the target camera when not irradiated by the light source; The number of response electrons generated by the target camera in response to the target monochromatic light is determined based on the first output voltage and the second output voltage.

2. The method for performing quantum efficiency testing on a wide-band camera according to claim 1, wherein: The quantum efficiency of the target monochromatic light is the quotient of the number of incident photons and the number of response electrons.

3. The method for performing quantum efficiency testing on a wide-band camera according to claim 1, wherein: The target monochromatic light is generated by: The primary monochromatic light generated by the monochromatic light source is filtered to obtain the secondary monochromatic light; The secondary monochromatic light is converted into parallel uniform monochromatic light to obtain the target monochromatic light.

4. The method for performing quantum efficiency testing on a wide-band camera according to claim 1, wherein: The step of calculating the quantum efficiency of the target camera corresponding to the target monochromatic light further includes: Changing the wavelength of the target monochromatic light and recalculating the quantum efficiency of the target camera; A quantum efficiency curve of the target camera is generated based on the quantum efficiency of the target camera relative to a plurality of target monochromatic lights.

5. A device for testing the quantum efficiency of a wide-band camera, characterized in that: include: A control unit, configured to implement the method for performing quantum efficiency testing on a wide-band camera according to any one of claims 1 to 4; The monochromatic light generating unit is used to generate target monochromatic light.

6. The device for testing quantum efficiency of a wide-band camera according to claim 5, wherein: The monochromatic light generating unit comprises: A monochromatic light source, configured to generate primary monochromatic light, wherein the primary monochromatic light includes monochromatic light of a set wavelength and a secondary spectrum; A filter, used to filter out the secondary spectrum in the primary monochromatic light; The collimator is used to convert the primary monochromatic light into uniform monochromatic light to obtain the target monochromatic light.

7. The device for testing quantum efficiency of a wide-band camera according to claim 5, wherein: Also included is a fiber optic spectrometer; The fiber optic spectrometer is used to generate a spectrum curve based on the target monochromatic light.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method for performing quantum efficiency testing on a wide-band camera as described in any one of claims 1 to 4 is implemented.

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