| 摘要 |
PURPOSE:To increse the objective detecting sensitivity, by incresing S/N toward duplicated directions, through the provision of a delay circuit and gate circuit with a signal processing section. CONSTITUTION:When an object is at the center of visual field, (n) sets of output signals are obtained as the output of an automatic gain control device 7 continuously every time interval of DELTAT0 at one period of rosette pattern. This output is given to n-1 sets of delay circuits 17a-17k in series connection having DELTAT0 of delay time each, and each output and the output of an automatic gain controller 7 are input to an adder 18a, then the signal generated in times series at the center of visual field is integrated and obtained as the output of the adder 18a at the same time. Further, a gate circuit 19 produces output pulses when the scanning radius is almost zero to obtain the signal for the center of visual field only and the gate circuit 19 is opened. |
