Multiple-laser flash shadowgraphy system for terminal studies of small-caliber projectiles

作者：Kalonia R C^*; Mitra Gautam; Singh G S; Varma R K; Singh Manpreet; Singh Manjit; Sethi V S; Yadav M S

来源：Optical Engineering, 2010, 49(6): 064303.

DOI：10.1117/1.3456614

• multiple-laser flash shadowgraphy
• laser diode beam expander
• shock waves
• terminal effects of firearms
• optoelectronics camera
• ultrashort laser flash generation

A multiple-laser flash shadowgraphy system has been innovatively designed and developed to study the terminal effects of projectiles. The system has been designed based on modulated laser diodes operated at low voltage and current. In order to study the ballistics effects of small arms, an exposure time of the order of a few hundreds ns and a delay time of the order of a few tens of mu s are needed. An ultrashort pulse generator has been developed to provide the exposure and delay time pulses. The developed system has been integrated with a field lens assembly and camera assembly. To record the shadowgraphs, a target is placed near the center of the field lens and a bullet is fired from a fixed gun. The system is described, and experimental results and conclusions are reported.

• 出版日期2010-6