| 摘要 |
PURPOSE:To obtain output signal without any distortion and achieve a highly accurate angle detection by calculating logic sum with output signal of other light detectors which are not affected by dust even if distortion results in output signal of one light detector using a plurality of light detectors. CONSTITUTION:Sunlight entering a light-screening surface 2 passes through this slit 1. Two light detectors where, for example, solid image sensing elements 4 are placed in straight line are mounted below the light-screening surface 2. In this configuration, when dust is adhered, for example, near the slit 1, output waveform of a light detector 3 which is located below this dust is distorted. On the other hand, output waveform of a light detector 6 which is not affected by dust is not distorted. By calculating logical sum of output signal of these two light detectors within a signal processing circuit 5, it is possible to obtain output waveform of the light detectors which are not affected by dust and to achieve a highly accurate detection of incidence angle. |
