Junchi Liu, Hongwen Li, Limei Yin, Hongzhuang Li. Equivalent Emissivity Inversion Method for Infrared Filters in Cutoff Band[J]. Acta Optica Sinica, 2018, 38(4): 0401002
- Acta Optica Sinica
- Vol. 38, Issue 4, 0401002 (2018)
Fig. 1. Diagram of radiation calibration light path without infrared filter
Fig. 2. Diagram of radiation calibration light path with infrared filter
Fig. 3. Schematic of self radiation determination principle for infrared filter in cutoff band
Fig. 4. Radiation model from limited surface source to micro surface source
Fig. 5. Normalized spectral radiation responsivity of medium wave infrared detector
Fig. 6. Radiation calibration results without infrared filter (integration time is 0.8 ms). (a) Radiation responsivity; (b) gray value bias
Fig. 7. Radiation calibration results with infrared filter (integration time is 0.8 ms). (a) Radiation responsivity; (b) gray value bias
Fig. 8. Difference of radiation calibration results (integration time is 0.8 ms). (a) Relative difference of radiation responsivity; (b) absolute difference of gray value bias
Fig. 9. Radiation calibration results without infrared filter (integration time is 4.0 ms). (a) Radiation responsivity; (b) gray value bias
Fig. 10. Radiation calibration results with infrared filter (integration time is 4.0 ms). (a) Radiation responsivity; (b) gray value bias
Fig. 11. Difference of radiation calibration results (integration time is 4.0 ms). (a) Relative difference of radiation responsivity; (b) absolute difference of gray value bias
Fig. 12. Diagram of reflection imaging light path (angle between infrared filter and optical axis is 45°)
Fig. 13. Reflection imaging effect (angle between infrared filter and optical axis is 45°)
Fig. 14. Diagram of reflection imaging light path (filter is perpendicular to optical axis)
Fig. 15. Reflection imaging effect (filter is perpendicular to optical axis). (a) Lens surface; (b) Dewar window
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Table 1. Parameters of experiment
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