Integrated photodetection system

摘要

The system comprises a main body unit 4 which has a first terminal 7 and a head unit 6 which has a second terminal 9 attachable to and detachable from the first terminal 7 and which is attachable to and detachable from the main body unit 4. The head unit 6 has a photosensor 18 connected to the second terminal 9 and adapted to generate photocurrent according to incident optical power, and a capacitor 20 connected to the photosensor 18. The main body unit 4 has a charging circuit 31 connected to the first terminal 7 and being capable of charging the capacitor 20 while the first terminal 7 is coupled to the second terminal 9, and a reading circuit 31 capable of reading a voltage of the capacitor 20 while the first terminal 7 is coupled to the second terminal 9. The capacitor 20 is discharged as the photocurrent is generated. <IMAGE>