| 摘要 |
PROBLEM TO BE SOLVED: To dispense with such a pretreatment as coating of paint and the like for a measurement object with black or mirror surface in a moire type heat distortion measuring device. SOLUTION: Desired temperature change is given to a measurement object 6 in a thermostatic chamber 2 and the heat distortion of the measurement object caused by the temperature change is to be measured by a moire sensor 3 through a transparent plate 12 at a window part 11 of the thermostatic chamber in a moire type heat distortion measuring device 1. The moire sensor comprises: a grid 15 where predetermined grid pattern is formed; an illuminating system 16 causing generation of the distortion grid pattern on the measurement object by irradiating illumination light to the measurement object through the grid; and a photographing system 17 obtaining images containing the moire pattern by photographing the distortion grid pattern in the measurement object through the grid. Parallel light beam is used as illumination light of the illumination system. COPYRIGHT: (C)2009,JPO&INPIT
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