| 摘要 |
PURPOSE:To simplify the constitution of connection terminals by superposing release signal and exposure information signal to the motor drive line which feeds power to a film winding motor. CONSTITUTION:The transmission circuit 20 and film winding motor 21 in a camera 18 and the reception circuit 12 and power source 14 in a light source unit 11 are connected by way of a superposition circuit 19. As a result of this, the carrier modulated by the release signal generated through closing of a release swtich 25 is supplied to the superposition circuit 19 from the transmission circuit 20 and is superposed on the motor drive line L. It is then demodulated in the reception circuit 12 and is sent to an exposure measurement circuit 13 which in turn opens a shutter 17 by way of a solenid 16. On the other hand, the carrier modulated by the photoelectric signal of the photo detector 24 which receives the light from a light source lamp 15 radiated to the subject 29 and reflected therefrom is supplied from the transmission circuit 20 to the superposition circuit 19 and is superposed on the motor drive line L, through which it is sent to the exposure measurement circuit 13. |
