| 摘要 |
PURPOSE:To enable the arbitrary setting a light-receiving device and accordance with the conditions of a place wherein it is set, and to enable quite the same fine control of illustration as in a precision type light-receiving device, by fitting a shutter-shaped or film-shaped light-intercepting plate slidably and removably to the case body of an ordinary type light-receiving device. CONSTITUTION:In a light-receiving device as a daylight sensor, one light-receiving element 12 is provided on the case body 11 of the light-receiving device, and a plurality of shutter-shaped or film-shaped thin light-intercepting plates 13 are provided removably and slidably in the input part of the case body 11. While the incident angle and incident range of lights are set arbitrarily, lights falling in at different angles are received by the light-receiving element 12 after the intensities of the lights are weighted to each other. |
