Design of Medium/Short Wave Infrared Radiation Calibration System Based on Imaging/Light Intensity Change Response

Table 1. Technical index of system
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Table 1. Technical index of system
Index Value
Measurement uncertainty /% ≤3
Waveband /μm 2.05--2.55, 3.70--4.80
Irradiance /(W·cm^-2) 6×10^-10-7×10^-4
Field angle /(°) ±0.6
Signal to noise ratio ≥100

Table 2. Uncertainty of each component of system

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Table 2. Uncertainty of each component of system

Component	Relative standard uncertainty /%
Temperature of blackbody	1.00
Emissivity of blackbody	0.30
Aperture of blackbody	1.00
Transmittance of collimator	0.42
Voltage measurement accuracy of system	0.74
Calibration reproducibility of system	0.85
Combined standard uncertainty	1.88

Table 3. Parameter setting of simulator
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Table 3. Parameter setting of simulator
Radiation source Parameter Value
Resistor array Gray scale 256
Waveband /μm 3.70--4.80
Temperature range /℃ 1000--1200
Blackbody Temperature interval /℃ 50
Field stop area /mm² 0.146
Waveband /μm 2.05--2.55

Table 4. Measurement result of irradiance
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Table 4. Measurement result of irradiance
Field stop area /mm² Irradiance /(W·cm^-2)
0.031 6.105×10^-9
0.196 3.934×10^-8
0.786 1.589×10^-7
1.540 3.169×10^-7
3.142 6.454×10^-7

Table 5. Temperature measurement result of equivalent blackbody
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Table 5. Temperature measurement result of equivalent blackbody
Temperature of blackbody /℃ Temperature of equivalent blackbody /℃
Measured by existing radiometer Measured by new radiometer
1000 410.0 407.8
1050 424.6 422.2
1100 438.4 436.3
1150 452.1 449.6
1200 465.0 462.6

Table 6. Measurement result of energy ratio

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Table 6. Measurement result of energy ratio

Measured object	Waveband	Energy ratio
Interference A	Medium/short wave	1∶3.91
Interference B	Medium/short wave	1∶4.02
Interference C	Medium/short wave	1∶3.91
Object/interference A	Medium wave	1∶3.83
Object/interference B	Medium wave	1∶4.35
Object/interference C	Medium wave	1∶5.41

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Sen Yang, Houqing Zhang. Design of Medium/Short Wave Infrared Radiation Calibration System Based on Imaging/Light Intensity Change Response[J]. Acta Optica Sinica, 2022, 42(6): 0611001

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