CN117111296A - Spectrum uniform target simulation system with specific output power and design method thereof - Google Patents
Spectrum uniform target simulation system with specific output power and design method thereof Download PDFInfo
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- F21S8/006—Solar simulators, e.g. for testing photovoltaic panels
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Abstract
The invention relates to an optical system and a design method thereof, in particular to a spectrum uniform target simulation system with specific output power and a design method thereof, which are used for solving the defects that the irradiance ratio in different wave bands is mainly considered in the existing wide-spectrum simulation light source to meet the standard requirement, and the influence of the change of the light source radiance along with different wavelengths is ignored, so that the space spectrum uniform target simulation in a complex environment cannot be realized. The spectrum uniformity target simulation system of the specific output power and the design method thereof comprise a light source module, a spectrum uniformity module, an attenuation module and a target simulation module, can accurately simulate the power of the specific output range when facing the influence of space environment backgrounds with different complexity degrees, and can reduce the result analysis error caused by the spectrum uniformity difference of the target.
Description
Technical Field
The invention relates to an optical system and a design method thereof, in particular to a spectrum uniformity target simulation system with specific output power and a design method thereof.
Background
When the spacecraft runs on orbit, the influence of the background of the space environment with different complexity is required, and in order to ensure the normal operation of the spacecraft, accurate ground simulation is required for certain space scenes, and the key points are the power requirement of the background and the spectral characteristics of the target. When the target is identified and key information is extracted, in order to prevent deviation of a simulation result caused by spectrum difference of a simulation light source, the spectrum characteristics of the light source need to be shaped and homogenized; secondly, the radiation intensity in some special space contexts is constant, so the system output power needs to be designed in the ground simulation, for example: the solar radiation intensity outside the simulated atmosphere, the signal intensity of a receiving end during satellite communication and the like.
The traditional wide-spectrum analog light source is generally a halogen lamp (such as a xenon lamp and the like) and an LED, and is often used for matching a target spectrum (such as the sun), the irradiance ratio in different wave bands is mainly considered to meet the standard requirement, and the influence of the change of the light source radiance along with different wavelengths is not considered; however, as the target environment to be simulated becomes more and more complex, laser light sources such as wide spectrum and high power are more and more widely used. For a broad-spectrum and high-power laser, the output light is broad-spectrum laser, and each wavelength has different spectral contributions to the spectrum of the output light spot, so that the spectral transmittance of the light of each wavelength is different, and as the output laser power is increased, the spectral characteristics of the light of the laser are changed, and the final analysis result is influenced.
Disclosure of Invention
The invention aims to solve the defects that the existing wide-spectrum simulation light source mainly considers that irradiance ratio in different wave bands needs to meet standard requirements, and the influence of the change of the light source radiance along with different wavelengths is ignored, so that the space spectrum uniform target simulation in a complex environment cannot be realized, and provides a spectrum uniform target simulation system with specific output power and a design method thereof.
In order to solve the defects existing in the prior art, the invention provides the following technical solutions:
a spectrum uniformity target simulation system with specific output power is characterized in that: the device comprises a light source module, a spectrum homogenizing module, an attenuation module and a target simulation module which are sequentially arranged along a light path;
the spectrum homogenizing module comprises a collimating mirror, a spectrum homogenizing filter and a focusing mirror which are sequentially arranged along a light path, wherein the collimating mirror is used for collimating the light beam output by the light source module, and the spectrum homogenizing filter is used for homogenizing the spectrum intensity difference of the light beam output by the collimating mirror; the focusing lens is used for converging the light beam output by the spectrum homogenizing filter;
the attenuation module is used for attenuating the output light beam of the spectrum homogenizing module so as to output the light beam with specific power;
the target simulation module is used for collimating the output light beam of the attenuation module so as to output an optical target with a required size in infinity.
Meanwhile, the invention also provides a design method of the spectrum uniformity target simulation system with specific output power, which is characterized by comprising the following steps:
step 1, selecting a working wave band lambda and output power P of a light source module;
the working wave band lambda is larger than or equal to the spectrum range lambda of the target to be simulated 1 ，λ 2 ]The output power P satisfies: the output power Y of the system after the output light beam of the light source module passes through the subsequent modules is more than or equal to twice of the maximum power required;
step 2, designing a spectrum homogenizing filter and a spectrum homogenizing module;
step 2.1, obtaining the relation L (lambda, P) between the spectral radiance of the light source module, the working wave band lambda and the output power P;
step 2.2, calculating the spectral homogenizing filter in the spectral range [ lambda ] 1 ，λ 2 ]Is a graph of the ideal transmittance of (3);
step 2.3, obtaining a coating tolerance curve according to the ideal transmittance curve of the step 2.2;
step 2.4, processing the coating film to obtain a spectrum homogenizing filter, evaluating the performance of the spectrum homogenizing filter, and recording processing errors;
step 3, establishing the spectrum uniformity target simulation system without an attenuation module;
step 4, measuring the system output power Y of the spectrum uniformity target simulation system established in the step 3 1 And outputs power P and system output power Y of the light source module 1 Curve fitting is carried out to obtain Y 1 ＝f(P)；
Step 5, adding an attenuation module into the spectrum uniformity target simulation system established in the step 3;
step 6, designing the transmittance of each attenuation sheet of the attenuation module;
step 7, measuring the system output power Y of the spectrum uniformity target simulation system established in the step 5 2 =f (P) ×t; wherein T is the transmittance of the attenuation module;
step 8, calculating the system spectral power ratio tau of the spectrum uniformity target simulation system established in the step 5;
step 9, switching the attenuation sheet of the attenuation module and controlling the output power P of the light source module to enable the spectrum uniform target simulation system to realize spectrum uniform infinite target simulation in a specific continuous power range, and finally enabling the system to output power Y 3 ＝f(P)×T×τ。
Further, the step 2.2 specifically includes:
step 2.2.1, performing discrete interval segmentation on the range of the output power P to obtain a set formed by i output power points which are arranged from small to large;
step 2.2.2, the 1 st output power point in the set is set in the spectral range [ lambda ] 1 ，λ 2 ]The spectrum radiance in the spectrum is taken as an initial value, and a corresponding initial transmittance curve is calculated;
step 2.2.3, sequentially setting the residual output power points in the step 2.2.1 set in the spectral range [ lambda ] 1 ，λ 2 ]Substituting the spectral radiance in the spectrum into the initial transmittance curve of the step 2.2.2, calculating the spectral uniformity corresponding to each output power point, obtaining the output power point meeting the requirement of the preset spectral uniformity, and determining the power applicability range corresponding to the initial transmittance curve of the step 2.2.2;
step 2.2.4, judging whether a power applicability range corresponding to i initial transmittance curves is obtained, if yes, executing step 2.2.5, otherwise, returning to step 2.2.1, deleting the 1 st output power point in the set of step 2.2.1, taking the 2 nd output power point as the 1 st output power point, and executing step 2.2.2;
step 2.2.5, selecting the maximum Power applicability Range P 1 ～P 2 The corresponding initial transmittance curve is used as a spectrum homogenizing filter in the spectrum range [ lambda ] 1 ，λ 2 ]Is a graph of the ideal transmittance of (3).
Further, the step 2.4 specifically includes:
step 2.4.1, performing film system design by using film plating software, and performing processing film plating to obtain a spectrum homogenizing filter;
step 24.2 testing the transmittance curve of a spectral homogenizing filter by means of a spectrophotometer, the spectral homogenizing filter being arranged in the spectral range [ lambda ] 1 ，λ 2 ]The average value quantization coating error of the corresponding maximum tolerance of the actual transmittance and coating tolerance curve and the minimum tolerance root mean square error of the coating tolerance curve;
step 2.4.3 testing the spectral homogenizing effect of the spectral homogenizing filter by utilizing a spectral radiometer, and using different output power points in the spectral range [ lambda ] 1 ，λ 2 ]The average of the spectral uniformity of (2) represents the spectral uniformity of the systemOverall evaluation was performed and processing errors were recorded as follows:
where i represents the i-th output power point and j represents the spectral range [ lambda ] 1 ，λ 2 ]Inner jth wavelength point, T ij Represents the spectral range [ lambda ] under the condition of the ith output power point 1 ，λ 2 ]Transmittance of spectrum homogenizing filter at jth wavelength point, n represents P in test 1 ～P 2 The number of the output power points of the light source modules selected in the range.
Further, the step 4 specifically includes: the off-axis parabolic mirror is arranged in front of a light outlet of a spectrum uniformity target simulation system without an attenuation module, and an optical power meter is used for testing the output power Y of the system at the focal plane position of the parabolic mirror 1 Recording the power P received by the optical power meter 3 Output power P of the light source module; calibrating the reflectivity R of the parabolic reflector, and outputting power Y of the system 1 ＝P 3 /R；
Output power P of light source module and system output power Y 1 Curve fitting is carried out to obtain Y 1 ＝f(P)。
Further, the step 6 specifically includes: the attenuation module has N attenuation sheets and transmittanceRespectively T 1 、T 2 ……T N The transmittance of each attenuation sheet satisfies the following formula:
wherein,respectively using the minimum system output power and the maximum system output power corresponding to the 1 st attenuation sheet; />Respectively using the minimum system output power and the maximum system output power corresponding to the 2 nd attenuation sheet;respectively using the minimum system output power and the maximum system output power corresponding to the Nth attenuation sheet; alpha is the output power coefficient required by the target to be simulated; n is greater than 2.
Further, the step 8 specifically includes: testing at the light outlet of a spectrum uniformity target simulation system by using a spectrum radiometer, and calculating the spectrum range [ lambda ] 1 ，λ 2 ]The spectral energy ratio within τ:
wherein n' represents the spectral range [ lambda ] 1 ，λ 2 ]The internal light source module outputs the number of points selected by the power.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention relates to a spectrum uniform target simulation system with specific output power, which comprises a light source module, a spectrum homogenizing module, an attenuation module and a target simulation module, wherein the power in a specific output range can be accurately simulated when the space environment background effects with different complexity degrees are faced, and the result analysis error caused by the spectrum uniformity difference of a target can be reduced.
(2) Compared with the traditional design, the design method of the spectrum uniform target simulation system with specific output power fully considers the change of the light source radiance along with different wavelengths, and is more suitable for spectrum uniform target simulation in a large power output range. In addition, the design of the spectrum homogenizing filter is carried out for each working wavelength point, and the actual processability of the spectrum homogenizing filter is ensured through the tolerance control design.
Drawings
FIG. 1 is a schematic diagram of a system for simulating a spectrum uniformity target with a specific output power according to an embodiment of the present invention;
FIG. 2 is a flow chart of a design method of a spectral uniformity target simulation system with specific output power according to an embodiment of the present invention.
The reference numerals are explained as follows: 1-a light source module; 2-spectrum homogenizing module, 21-collimating mirror, 22-spectrum homogenizing filter and 23-focusing mirror; a 3-attenuation module; and 4, a target simulation module.
Detailed Description
The invention is further described below with reference to the drawings and exemplary embodiments.
Referring to fig. 1, a spectrum uniformity target simulation system for a specific output power includes a light source module 1, a spectrum uniformity module 2, an attenuation module 3, and a target simulation module 4, which are sequentially disposed.
The light source module 1 adopts a laser, in particular a C-band high-power continuous output fiber laser, and the maximum output power can reach 2.4W.
The spectrum homogenizing module 2 comprises a collimating mirror 21, a spectrum homogenizing filter 22 and a focusing mirror 23 which are sequentially arranged along the light path, wherein the collimating mirror 21 is used for collimating the light beam output by the light source module 1, and the spectrum homogenizing filter 22 is used for homogenizing the spectrum intensity difference of the light beam output by the collimating mirror 21; the focusing mirror 23 is used to converge the light beam output from the spectrum homogenizing filter 22.
The attenuation module 3 adopts an attenuation target wheel with four attenuation sheets, and is used for attenuating the output light beam of the spectrum homogenizing module 2 so as to output the light beam with specific power. In this embodiment, the four attenuation sheet transmittances are 0.5, 0.25, 0.11, and 0.05, respectively. The transmittance of the attenuation module 3 when the attenuation sheet is not used is 1.
The target simulation module 4 employs a collimator objective for collimating the output beam of the attenuation module 3 to output an optical target of a desired size at infinity.
Referring to fig. 2, a design method of the above-mentioned spectrum uniformity target simulation system with specific output power includes the following steps:
step 1, selecting an operating band lambda and output power P of a light source module 1;
the working wave band lambda is larger than or equal to the spectrum range lambda of the target to be simulated 1 ，λ 2 ]The output power P satisfies: the output power Y of the system of the light source module 1 after the output light beam passes through the subsequent modules is more than or equal to twice of the maximum power required;
spectral range [ lambda ] of object to be simulated of the present embodiment 1 ，λ 2 ]Is [1540nm,1560nm]The operating band lambda of the light source module 1 is [1530nm,1570nm]The output power P can reach 2.4W;
step 2, designing a spectrum homogenizing filter 22 and a spectrum homogenizing module 2;
step 2.1, obtaining the relation L (lambda, P) between the spectral radiance of the light source module 1 and the working wave band lambda and the output power P;
step 2.2 calculating the spectral homogenizing Filter 22 in spectral Range [ lambda ] 1 ，λ 2 ]Is a graph of the ideal transmittance of (3);
step 2.2.1, performing discrete interval segmentation on the range of the output power P to obtain a set formed by i output power points which are arranged from small to large;
step 2.2.2, the 1 st output power point in the set is set in the spectral range [ lambda ] 1 ，λ 2 ]The spectrum radiance in the spectrum is taken as an initial value, and a corresponding initial transmittance curve is calculated;
step 2.2.3, sequentially setting the residual output power points in the step 2.2.1 set in the spectral range [ lambda ] 1 ，λ 2 ]Spectral radiance substitution in step2.2.2, calculating the spectrum uniformity corresponding to each output power point to obtain the output power point meeting the requirement of the preset spectrum uniformity, and determining the power applicability range corresponding to the initial transmittance curve of the step 2.2.2;
step 2.2.4, judging whether a power applicability range corresponding to i initial transmittance curves is obtained, if yes, executing step 2.2.5, otherwise, returning to step 2.2.1, deleting the 1 st output power point in the set of step 2.2.1, taking the 2 nd output power point as the 1 st output power point, and executing step 2.2.2;
step 2.2.5, selecting the maximum Power applicability Range P 1 ～P 2 The corresponding initial transmittance curve is used as a spectral homogenizing filter 22 in the spectral range lambda 1 ，λ 2 ]Is a graph of the ideal transmittance of (3);
step 2.3, obtaining a coating tolerance curve according to the ideal transmittance curve of the step 2.2;
step 2.4, processing the coating film to obtain a spectrum homogenization filter 22, evaluating the performance of the spectrum homogenization filter 22, and recording processing errors;
step 2.4.1, performing film system design by using film plating software, and performing processing film plating to obtain a spectrum homogenizing filter 22;
step 2.4.2 the transmittance curve of the spectral homogenizing filter 22 was tested using a spectrophotometer, with the spectral homogenizing filter 22 in the spectral range [ lambda ] 1 ，λ 2 ]The average value quantization coating error of the corresponding maximum tolerance of the actual transmittance and coating tolerance curve and the minimum tolerance root mean square error of the coating tolerance curve;
step 2.4.3 testing the spectral homogenizing effect of the spectral homogenizing filter 22 with a spectral radiometer using different output power points in the spectral range [ lambda ] 1 ，λ 2 ]The average of the spectral uniformity of (2) represents the spectral uniformity of the systemOverall evaluation was performed and processing errors were recorded as follows:
where i represents the i-th output power point and j represents the spectral range [ lambda ] 1 ，λ 2 ]Inner jth wavelength point, T ij Represents the spectral range [ lambda ] under the condition of the ith output power point 1 ，λ 2 ]Transmittance of the spectrum homogenizing filter 22 at the jth wavelength point in the inner, n represents P at the time of test 1 ～P 2 The number of output power points of the light source module 1 selected in the range;
step 3, establishing the spectrum uniformity target simulation system without the attenuation module 3, wherein the caliber of the spectrum uniformity target simulation system is phi 200mm and F # 4;
step 4, measuring the system output power Y of the spectrum uniformity target simulation system established in the step 3 1 And outputs power P and system output power Y to the light source module 1 1 Curve fitting is carried out to obtain Y 1 ＝f(P)；
The off-axis parabolic mirror is arranged in front of a light outlet of a spectrum uniform target simulation system without an attenuation module 3, so that light reflected to a detector is not blocked during testing, and the output power Y of the system is tested at the focal position of the parabolic mirror by using an optical power meter 1 Recording the power P received by the optical power meter 3 Output power P with light source module 1; calibrating the reflectivity R of the parabolic reflector, and outputting power Y of the system 1 ＝P 1 /R；
Curve fitting is performed on the output power x of the light source module 1 and the system output power Y to obtain y=f (x) =7×10 - 6 P 1 2 +0.0637P 1 -2.3543；
Step 5, adding an attenuation module 3 into the spectrum uniformity target simulation system established in the step 3;
step 6, designing the transmittance of each attenuation sheet of the attenuation module 3;
the attenuation module 3 has four attenuation sheets with transmittance of T respectively 1 ＝0.5、T 2 ＝0.25、T 3 ＝0.11、T 4 =0.05, not to makeThe transmittance T of the attenuation module 3 when using the attenuation sheet 0 =1, the transmittance of each attenuation sheet of the attenuation target wheel satisfies the following equation:
wherein,respectively using the minimum system output power and the maximum system output power corresponding to the 4 th attenuation sheet; alpha is the output power coefficient required by the target to be simulated, and alpha is 10%;
step 7, measuring the system output power Y of the spectrum uniformity target simulation system established in the step 5 2 =f (P) ×t; wherein T is the transmittance of the attenuation module 3;
step 8, calculating the system spectral power ratio tau of the spectrum uniformity target simulation system established in the step 5;
testing at the light outlet of a spectrum uniformity target simulation system by using a spectrum radiometer, and calculating the spectrum range [ lambda ] 1 ，λ 2 ]The spectral energy ratio within τ:
wherein n' represents the spectral range [ lambda ] 1 ，λ 2 ]The number of the output power points of the internally selected light source modules 1;
step 9, by switching the attenuation sheet of the attenuation module 3 and controlling the output power P of the light source module 1, the spectrum uniform target simulation system realizes spectrum uniform infinite target simulation in a specific continuous power range, and finally the system output power Y 3 ＝f(P)×T×τ。
The present embodiment is divided into five power output intervals: 2-5 mW, 5-12 mW, 12-25 mW, 25-50 mW, 50-130 mW, respectively corresponding to five transmittance T 0 ＝1、T 1 ＝0.5、T 2 ＝0.25、T 3 ＝0.11、T 4 ＝0.05。
Claims (7)
1. A spectrally uniform target simulation system of a specific output power, characterized by: the device comprises a light source module (1), a spectrum homogenizing module (2), an attenuation module (3) and a target simulation module (4) which are sequentially arranged along a light path;
the spectrum homogenizing module (2) comprises a collimating mirror (21), a spectrum homogenizing optical filter (22) and a focusing mirror (23) which are sequentially arranged along a light path, wherein the collimating mirror (21) is used for collimating the light beam output by the light source module (1), and the spectrum homogenizing optical filter (22) is used for homogenizing the spectrum intensity difference of the light beam output by the collimating mirror (21); the focusing mirror (23) is used for converging the light beam output by the spectrum homogenizing filter (22);
the attenuation module (3) is used for attenuating the output light beam of the spectrum homogenizing module (2) so as to output the light beam with specific power;
the target simulation module (4) is used for collimating the output light beam of the attenuation module (3) so as to output an optical target with a required size at infinity.
2. A method of designing a spectrally uniform target simulation system of a specific output power according to claim 1, comprising the steps of:
step 1, selecting an operating band lambda and output power P of a light source module (1);
the working wave band lambda is larger than or equal to the spectrum range lambda of the target to be simulated 1 ，λ 2 ]The output power P satisfies: the output power Y of the system of the light source module (1) after the output light beam passes through the subsequent modules is more than or equal to twice of the maximum power required;
step 2, designing a spectrum homogenizing filter (22) and a spectrum homogenizing module (2);
step 2.1, obtaining the relation L (lambda, P) between the spectral radiance of the light source module (1) and the working wave band lambda and the output power P;
step 2.2, calculating the spectral homogenizing filter (22) in the spectral range [ lambda ] 1 ，λ 2 ]Is a graph of the ideal transmittance of (3);
step 2.3, obtaining a coating tolerance curve according to the ideal transmittance curve of the step 2.2;
step 2.4, processing the coating film to obtain a spectrum homogenizing optical filter (22), evaluating the performance of the spectrum homogenizing optical filter (22), and recording processing errors;
step 3, establishing the spectrum uniformity target simulation system without the attenuation module (3);
step 4, measuring the system output power Y of the spectrum uniformity target simulation system established in the step 3 1 And outputs power P and system output power Y to the light source module (1) 1 Curve fitting is carried out to obtain Y 1 ＝f(P)；
Step 5, adding an attenuation module (3) into the spectrum uniformity target simulation system established in the step 3;
step 6, designing the transmittance of each attenuation sheet of the attenuation module (3);
step 7, measuring the system output power Y of the spectrum uniformity target simulation system established in the step 5 2 =f (P) ×t; wherein T is the transmittance of the attenuation module (3);
step 8, calculating the system spectral power ratio tau of the spectrum uniformity target simulation system established in the step 5;
step 9, switching the attenuation sheet of the attenuation module (3) and controlling the output power P of the light source module (1) to enable the spectrum uniform target simulation system to realize spectrum uniform infinite target simulation in a specific continuous power range, and finally outputting the power Y of the system 3 ＝f(P)×T×τ。
3. The method for designing a spectrally uniform target simulation system for a specific output power according to claim 2, wherein the step 2.2 specifically comprises:
step 2.2.1, performing discrete interval segmentation on the range of the output power P to obtain a set formed by i output power points which are arranged from small to large;
step 2.2.2, the 1 st output power point in the set is set in the spectral range [ lambda ] 1 ，λ 2 ]The spectrum radiance in the spectrum is taken as an initial value, and a corresponding initial transmittance curve is calculated;
step 2.2.3, step 2.2 is followed.The remaining output power points in the 1 set are in the spectral range [ lambda ] 1 ，λ 2 ]Substituting the spectral radiance in the spectrum into the initial transmittance curve of the step 2.2.2, calculating the spectral uniformity corresponding to each output power point, obtaining the output power point meeting the requirement of the preset spectral uniformity, and determining the power applicability range corresponding to the initial transmittance curve of the step 2.2.2;
step 2.2.4, judging whether a power applicability range corresponding to i initial transmittance curves is obtained, if yes, executing step 2.2.5, otherwise, returning to step 2.2.1, deleting the 1 st output power point in the set of step 2.2.1, taking the 2 nd output power point as the 1 st output power point, and executing step 2.2.2;
step 2.2.5, selecting the maximum Power applicability Range P 1 ～P 2 The corresponding initial transmittance curve is used as a spectrum homogenizing filter (22) in the spectrum range [ lambda ] 1 ，λ 2 ]Is a graph of the ideal transmittance of (3).
4. A method for designing a spectrally uniform target simulation system for a specific output power according to claim 3, wherein said step 2.4 comprises:
step 2.4.1, performing film system design by using film plating software, and performing processing film plating to obtain a spectrum homogenizing filter (22);
step 2.4.2 testing the transmittance curve of the spectral homogenizing filter (22) using a spectrophotometer, the spectral homogenizing filter (22) being used to measure the transmittance curve of the spectral region [ lambda ] 1 ，λ 2 ]The average value of the root mean square error of the maximum tolerance of the corresponding actual transmittance and coating tolerance curve and the minimum tolerance of the coating tolerance curve quantifies the coating error;
step 2.4.3 testing the spectral homogenizing effect of the spectral homogenizing filter (22) with a spectral radiometer using different output power points in the spectral range [ lambda ] 1 ，λ 2 ]The average of the spectral uniformity of (2) represents the spectral uniformity of the systemPerforming totalityEvaluation, recording processing errors, specifically as follows:
where i represents the i-th output power point and j represents the spectral range [ lambda ] 1 ，λ 2 ]Inner jth wavelength point, T ij Represents the spectral range [ lambda ] under the condition of the ith output power point 1 ，λ 2 ]Transmittance of spectrum homogenizing filter (22) of the jth wavelength point in the inner, n represents P at test 1 ～P 2 The number of output power points of the light source module (1) selected in the range.
5. The method for designing a spectrally uniform target simulation system for a specific output power according to claim 2, wherein the step 4 specifically comprises: the off-axis parabolic mirror is arranged in front of a light outlet of a spectrum uniform target simulation system without an attenuation module (3), and an optical power meter is used for testing the output power Y of the system at the focal plane position of the parabolic mirror 1 Recording the power P received by the optical power meter 3 Output power P with the light source module (1); calibrating the reflectivity R of the parabolic reflector, and outputting power Y of the system 1 ＝P 3 /R；
Output power P to light source module (1) and system output power Y 1 Curve fitting is carried out to obtain Y 1 ＝f(P)。
6. The method for designing a spectrally uniform target simulation system for a specific output power according to claim 2, wherein the step 6 specifically comprises: the attenuation modules (3) have N attenuation sheets with transmittance of T respectively 1 、T 2 ……T N The transmittance of each attenuation sheet satisfies the following formula:
wherein,respectively using the minimum system output power and the maximum system output power corresponding to the 1 st attenuation sheet; />Respectively using the minimum system output power and the maximum system output power corresponding to the 2 nd attenuation sheet;respectively using the minimum system output power and the maximum system output power corresponding to the Nth attenuation sheet; alpha is the output power coefficient required by the target to be simulated; n is greater than 2.
7. The method for designing a spectrally uniform target simulation system for a specific output power according to claim 1, wherein the step 8 specifically comprises: testing at the light outlet of a spectrum uniformity target simulation system by using a spectrum radiometer, and calculating the spectrum range [ lambda ] 1 ，λ 2 ]The spectral energy ratio within τ:
wherein n' represents the spectral range [ lambda ] 1 ，λ 2 ]The internal light source module (1) outputs the number of points selected by the power.
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