| 摘要 |
<p>PURPOSE:To detect the substantial direction of sunlight from the sun. CONSTITUTION:A light shutting film 36 with a pin hole 35 is formed at one face of a glass substrate 34, and a position detecting element 37 with a photoelectric converting film made of a semiconductor is provided at the other face. The light from the sun enters the position detecting element 37 as a spot light H through the pin hole 35. The position detecting element 37 detects the position of the center of gravity of the intensity of the photoelectric current at a part where the light is received. Therefore, even when the intensity of the light directly coming from the sun to the ground and that of the scattering light are different due to the weather, the position of the center of gravity of the intensity distribution of the sunlight is detected corresponding to the weather, making it possible to detect the substantial direction of the sunlight.</p> |
