| 摘要 |
PURPOSE:To provide the titled detector with a limiting function of a condensing angle with simple constitution by forming two light incident windows having the same shape and two light projection windows enabled to project incident light rays without mixing them on a condenser and making the projected light rays from the projection windows incident on respectively different photoelectric converting elements. CONSTITUTION:The parallel light incident windows 23, 24 having the same shape and the paprallel light projection windows 25, 26 having the same shape are formed on the rectangular parallelepiped-like condenser 22 and incident light 27 is passed through the windows 23, 24 and then the windows 25, 26 without being mixed and converted into electric signals by photodiodes 30, 31. The size of the photodetecting surfaces 32, 33 of photodiodes 30, 31 is set larger than that of the windows 25, 26 to reduce the unbalance of the photodetected quantity and the windows 23, 24 and 25, 26 are integrally formed. A condensing angle can be easily determined by the size of the windows 23-26 and the distances between the windows 23, 24 and between the windows 25, 26. |
