Schedin S, Pedrini G, Tiziani H J, Aggarwal A K
Institut für Technische Optik, Universität Stuttgart, Pfaffenwaldring 9, D-70569 Stuttgart, Germany.
Appl Opt. 2001 Jun 1;40(16):2692-7. doi: 10.1364/ao.40.002692.
A comparison of several endoscopes as object image carriers in pulsed digital holography is presented. Three multicore flexible fiber endoscopes of different spatial resolution and one rigid endoscope are investigated. The four endoscopes are integrated in a setup for the recording of digital holograms on a CCD camera. A double-pulsed ruby laser is used as the light source. A spatial carrier is introduced by an off-axis reference beam, which permits quantitative evaluation of the phase difference between two holograms recorded with a short time separation (5-600 micros). From reported studies it may be inferred that the quality of the phase maps so derived from digital holographic interferometry has a strong correlation to the spatial resolution of the multicore fiber used in these endoscopes. With the endoscopic technique combined with pulsed digital holography a number of useful applications (in areas such as medical endoscopy, micromechanics, and microelectronics) are envisaged for which access to the objects of interest is otherwise difficult.
本文对几种用于脉冲数字全息术中的内窥镜作为物体图像载体进行了比较。研究了三种具有不同空间分辨率的多芯柔性纤维内窥镜和一种刚性内窥镜。这四种内窥镜被集成到一个用于在电荷耦合器件（CCD）相机上记录数字全息图的装置中。使用双脉冲红宝石激光器作为光源。通过离轴参考光束引入空间载波，这允许对在短时间间隔（5 - 600微秒）内记录的两个全息图之间的相位差进行定量评估。从已报道的研究中可以推断，通过数字全息干涉术得到的相位图质量与这些内窥镜中使用的多芯光纤的空间分辨率有很强的相关性。通过将内窥镜技术与脉冲数字全息术相结合，可以设想在一些有用的应用（如医学内窥镜检查、微机械学和微电子学等领域）中，否则很难接近感兴趣的物体。
