| 摘要 |
PROBLEM TO BE SOLVED: To hold plural optical sensors in a state where they face a CRT screen and they are precisely arranged at the time of measuring the screen distortion of CRT and convergence in a multi-channel system. SOLUTION: The diameter of an insertion hole 201 is set to be 4.0ϕwhich is large than the external diameter 2.5ϕof the optical guide part 12 of the optical sensor for display device 10. Internal holders 401 and 402 shaped in the external diameters of 4.1ϕare inserted into both ends of the insertion hole. The holes of the diameter 2.53ϕare provided for the centers of the internal holders, and the optical guide part is inserted into the holes. Since the diameter of the insertion hole is set to 4.0ϕwhich is larger than the external diameter of the optical guide part, a thick drill can be used. Thus, the end of the drill at the time of work can be prevented. Thus, the insertion hole becomes vertical to a sensor frame with high precision and the installed optical sensor for display device becomes vertical to the sensor frame with high precision.
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