| 摘要 |
PURPOSE:To match the vidual point of a camera lens with that of the operator of a remote controller automatically by controlling the posture of a camera so that light projected from the remote controller is made uniformly incident to plural photodetecting elements. CONSTITUTION:Respective output voltage from photodetecting elements 1-4 fitted to the body of a camera are inputted to BPFs 10-13 through amplifiers 6- 9, noise components are removed from the respective voltages by the BPFs 10- 13 and the noise-removed voltages are inputted to differential amplifiers 14, 15. Consequently, the differential amplifiers 14, 15 amplify the voltage differences between photodetecting elements 1, 2 and 3, 4 respectively and respective outputs become AC signals oscillated in the positive and negative directions by regarding 0V as a reference. The output signals of the differential amplifiers 14, 15 are inputted to respective motor driving circuits 16, 17 to control the turning directions of the motors 18, 19. The motors 18, 19 are rotated until the outputs of respective differential amplifiers 14, 15 become ''0''V.
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