| 摘要 |
PURPOSE:To detect automatically the height of a CRD housing, by combining a laser oscillator, which has a horizontal laser light setting mechanism and a horizontal laser rotating mechanism, and photocells. CONSTITUTION:The laser beam emitted from a laser oscillator 10 which is set on a CRD housing 4 as an installation reference and has the horizontal laser light setting mechanism and the horizontal laser light rotating mechanism is made incident to a photodetector 11 set on a CRD housing 5. The photodetector 11 consists of two, upper and lower photocell arrays, and the position of the laser beam in photocell arrays is detected by the output. |
