摘要
本文分析了动态微粒场测试的特点,设计了一种适合于动态微粒场用脉冲激光全息诊断的全息光路,并从理论上进行了分析。使用这种全息光路记录的微粒场全息图,当用记录参考光,而不是它的共轭光照明再现时,就能获得微粒的实象,因而,使得参考光类型的选择更加灵活。同时,由于光路设计上还考虑了参物光之间的空间相干性的匹配,故降低了对激光器横模的要求。
The character of dynamic particle field measurement has been analyzed in this paper. A holographic arrangement which is suitable for laser-pulsed holographic diagnostic of dynamic particle fields has been designed and analyzed theoretically. If hologram of particle fiels is recorded using above holographic arrangement, the real image of particles can be reconstructed when the hologram is illuminated by recording reference beam rather than its conjugate, so the type of reference beam can be selected more conveniently. Meanwhile, the requirement to transversal mode of laser is reduced because the spatial interference match of reference and scene beams is considered.
关键词
全息光路
微粒场
测试
dynamic particle field
laser-pulsed holography
spatial interference.
