Patent ID: 8780190
Filing Date: 2014-07-15
Classification: A61B,G02B

Abstract:
1. Intra-oral camera comprising an imaging system for imaging an object located before a viewing window of the intra-oral camera onto a photographing unit, the imaging system comprising: at least one focusing unit for setting a suitable focus; a diaphragm unit for forming a variable diaphragm, wherein the diaphragm is set independently of the focus set by the focusing unit; and a control unit for automatically varying a diameter of the diaphragm unit, wherein the control unit is configured to automatically increase the diameter of the diaphragm unit on occurrence of one of first and second conditions, the first condition being that at least one output signal is greater than a signal level, the second condition being that the at least one output signal is less than the signal level, the control unit is further configured to decrease the diameter of the diaphragm unit on occurrence of another one of the first and second conditions, and the photographing unit provides the at least one output signal to the control unit.