Skupsch C, Chaves H, Brücker C
Institute of Mechanics and Fluid Dynamics, TU Bergakademie Freiberg, Germany.
Rev Sci Instrum. 2011 Aug;82(8):083705. doi: 10.1063/1.3624692.
The Cranz-Schardin camera utilizes a Q-switched Nd:YAG laser and four single CCD cameras. Light pulse energy in the range of 25 mJ and pulse duration of about 5 ns is provided by the laser. The laser light is converted to incoherent light by Rhodamine-B fluorescence dye in a cuvette. The laser beam coherence is intentionally broken in order to avoid speckle. Four light fibers collect the fluorescence light and are used for illumination. Different light fiber lengths enable a delay of illumination between consecutive images. The chosen interframe time is 25 ns, corresponding to 40 × 10(6) frames per second. Exemplarily, the camera is applied to observe the bow shock in front of a water jet, propagating in air at supersonic speed. The initial phase of the formation of a jet structure is recorded.
克兰兹-沙尔丁相机使用调Q钕：钇铝石榴石激光器和四个单电荷耦合器件相机。激光器提供25毫焦范围内的光脉冲能量和约5纳秒的脉冲持续时间。激光通过比色皿中的若丹明-B荧光染料转换为非相干光。为避免散斑，故意破坏激光束的相干性。四根光纤收集荧光用于照明。不同的光纤长度可使连续图像之间的照明产生延迟。选定的帧间时间为25纳秒，相当于每秒40×10(6)帧。例如，该相机用于观察以超音速在空气中传播的水射流前方的弓形激波。记录了射流结构形成的初始阶段。
