| 摘要 |
PURPOSE:To make the titled light pen light in weight and miniature in size by propagating a light beam on a CRT screen to a photodetector part by using a condensing lens and an optical fiber. CONSTITUTION:The titled light pen is constituted of a light pen 1 and a CRT control part 5 to which the light pen 1 is connected, and the light pen 1 is connected to a photodetector part 3 through a cord 2. This photodetector 3 converts an optical signal which is sent through the cord 2, to an electric signal, and sends out a data to a photodetecting data control part 4. In this regard, the photodetector part 3 and the photodetecting data control part 4 are contained in the CRT control part 5. In such a way, a light beam on a CRT screen is collected to the end face of an optical fiber 7, and propagated as it is to the photodetector part 3.
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