Superhigh reflectivity measurement of arbitrary spheric optical element

Hengyu, 易亨瑜 Yi; Yong, 彭勇 Peng; Zuxin, 黄祖鑫 Huang; Xingwu, 陈兴无 Chen

doi:10.3788/hplpb20132502.0287

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“…Dong Hewei of Chinese Academy of Metrology, designed a Z-shaped cavity structure with a size of only 26.4cm×8.5cm×4.5cm, and the maximum residual error measured in the experiment is less than 0.004μW. The folded cavity has excellent performance, small size, and has extremely high commercial application value [27] .…”

Section: Cavity Ring-down Technologymentioning

confidence: 99%

Advance on transmittance measurements methods

Chen

Wang

et al. 2022

5th Optics Young Scientist Summit (OYSS 2022)

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The quality of the output signal of the laser gyro is closely related to the loss of the high mirror. At present, the research on the total loss of the high-reflection film has been quite perfect. In order to further study the optical properties of the high-reflection film, the total loss of the high-reflection film can be refined into three parts: transmission loss, scattering loss and absorption loss. Starting from the current research situation at home and abroad, this paper mainly introduces three methods, including spectrophotometer method, DF transflectometer and cavity ring-down technique, and discusses the measurement principles of these three methods. The development status and accuracy level of transmittance measurement technology, and the advantages and disadvantages of these three methods are analyzed, and the methods to improve the measurement accuracy and the possible development direction in the future are pointed out. Finally, other common methods of transmittance and reflectance measurement and the corresponding measurement accuracy are introduced.

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Section: Cavity Ring-down Technologymentioning

confidence: 99%