YAN Ya-dong,WEI Ming-zhi,LI Qi,et al.Design of optical system for laser fusion shock velocity measurement[J].Optics and Precision Engineering,2021,29(02):259-266.
YAN Ya-dong,WEI Ming-zhi,LI Qi,et al.Design of optical system for laser fusion shock velocity measurement[J].Optics and Precision Engineering,2021,29(02):259-266. DOI: 10.37188/OPE.20212902.0259.
Design of optical system for laser fusion shock velocity measurement
To meet the demands of laser fusion shock velocity measurements, a composite system that integrates a passive scanning optical pyrometer with an active shock wave velocity interferometer was designed in this study. The common-path lens was achromatic and designed in the range of 400–700 nm by using several types of radiation resistance optical materials. The mirrors of a Mach⁃Zehnder interferometer were motorized and could be controlled remotely, thereby simplifying the operation of the system. In addition, the system magnification could be altered by using different focal lengths with a streak camera coupling lens. The field of view of the combined system is 2 mm, and the magnification settings for the active velocity measuring system are 10×, 20×, and 30×. The static interference fringes are straight, and their contrast is greater than 0.69. The system has a 4.72 μm spatial resolution. The system can be applied to dynamic measurement of shock velocity in a laser fusion device.
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