Weijian LIU, Yang HUANG, Shengjie ZHANG, Junru SONG, Chao ZHANG, Yi JI, Qun YUAN. High Precision Testing of Optical Homogeneity of Large Aperture Infrared Materials Based on Beam Expansion and Auxiliary Measurement[J]. Acta Photonica Sinica, 2025, 54(2): 0231002
- Acta Photonica Sinica
- Vol. 54, Issue 2, 0231002 (2025)
Fig. 1. Principle of traditional four-step interferometry
Fig. 2. Optical homogeneity measurement system of large aperture infrared materials based on beam expansion
Fig. 3. Four-step interferometry based on beam expansion and auxiliary measurement
Fig. 4. The optical homogeneity testing experiment of the large aperture infrared material
Fig. 5. The measurement results of the homogeneity of small aperture sample
Fig. 6. The measurement results of the four-step interferometry based on beam expansion and auxiliary measurement
Fig. 7. The pixel error induced by wedge of the sample
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Table 1. Homogeneity measurement results of infrared materials
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Table 2. The measurement repeatability
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Table 3. Measurement uncertainty analysis
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