| 摘要 |
A discharge lamp control system for use in a copier or camera includes a variable power supply (18) for providing energy to a discharge lamp (13). The power supply comprises a plurality of capacitors (C1-CN) connected to be charged in parallel and with their outputs selectively connectable through switches (S1-SN) to the discharge lamp. The appropriate capacitor(s) are discharged through the lamp in response to processor (20) which either predicts, or calculates in real time, the required exposure level at an object plane. The processor is responsive to a sensor (19) receiving light from a separate pre-flash lamp or from the main lamp (13) when supplied only from a single capacitor. <IMAGE> |
