High Power Laser and Particle Beams, Volume. 37, Issue 7, 071003(2025)
Performance characterization and defect analysis of large-aperture sampling optics based on cavity ring-down method
Figures & Tables(9)
Fig. 1. Schematic diagram and image of cavity ring-down apparatus for reflectivity mapping of large-aperture HR optics
Fig. 2. Optical path diagram of the reflectivity measurements from the HR surface and the AR surface independently. R1 and R2 are the cavity mirrors
Fig. 4. Optical path diagram of two-channel CRD. Residual reflection of the AR coating was collected by PD2
Fig. 6. Reflectivity mapping results of the sampling optics in a region of 30/40 mm diameter
Fig. 7. Reflectance distribution defect point pairing diagram measured by surface incident scanning of anti reflective film
Fig. 8. Reflectivity and residual reflection mapping results measured from the AR surface with two-channel CRD
Table 1. Comparison of reflectance statistics between reflective film surface and anti reflective film surface in incident testing
View tableView in ArticleTable 1. Comparison of reflectance statistics between reflective film surface and anti reflective film surface in incident testing
average reflectivity/% maximum reflectivity/% maximum-probability reflectivity/% measured from HR surface 99.9804 99.9886 99.9855 measured from AR surface 99.9442 99.9695 99.9593 reflectivity difference 0.0362 0.0191 0.0262
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Wenchao Zhou, Ting Deng, Chen Peng, Yulong Cao, Wei Wei, Siliang Liu, Jing Wang. Performance characterization and defect analysis of large-aperture sampling optics based on cavity ring-down method[J]. High Power Laser and Particle Beams, 2025, 37(7): 071003
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Received: Dec. 4, 2024
Accepted: Apr. 1, 2025
Published Online: Jul. 18, 2025
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