Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
241 words
A double sweep streak camera device for measuring selected characteristics of a repetitive light beam and including an image tube with a focusing electronic lens system having a rear stage, the device comprising: a streak tube having a pair of first deflecting electrodes for forming a first deflecting electric field in a first direction at the rear stage of the focusing electronic lens system and a pair of second deflecting electrodes for forming a second deflecting electric field substantially perpendicular to said first deflecting electric field; a DC high voltage generating unit for supplying operating voltages to said streak tube; a first trigger signal generating unit for providing a first trigger signal synchronous with the light beam under measurement; a first deflecting voltage generating unit for applying a periodic deflecting voltage to said first deflecting electrodes in synchronization with said first trigger signal, to cause said first deflecting electrodes to generate said first deflecting electric field; a second trigger signal generating unit for providing a second trigger signal for starting observation of the waveform of the light beam under measurement; a second deflecting voltage generating unit responsive to said second trigger signal for applying a deflecting voltage that is lower in frequency than said periodic deflecting voltage and for applying said deflecting voltage to said second deflecting electrodes; and a gate voltage generating unit for causing said streak tube to perform a gating operation in synchronization with said second trigger signal.
Claim 2
Dependent Claim
241 words
A double sweep streak camera device for measuring selected characteristics of a repetitive light beam and including an image tube with a focusing electronic lens system having a rear stage, the device comprising: a streak tube having a pair of first deflecting electrodes for forming a first deflecting electric field in a first direction at the rear stage of the focusing electronic lens system and a pair of second deflecting electrodes for forming a second deflecting electric field substantially perpendicular to said first deflecting electric field; a DC high voltage generating unit for supplying operating voltages to said streak tube; a first trigger signal generating unit for providing a first trigger signal synchronous with the light beam under measurement; a first deflecting voltage generating unit for applying a periodic deflecting voltage to said first deflecting electrodes in synchronization with said first trigger signal, to cause said first deflecting electrodes to generate said first deflecting electric field; a second trigger signal generating unit for providing a second trigger signal for starting observation of the waveform of the light beam under measurement; a second deflecting voltage generating unit responsive to said second trigger signal for applying a deflecting voltage that is lower in frequency than said periodic deflecting voltage and for applying said deflecting voltage to said second deflecting electrodes; and a gate voltage generating unit for causing said streak tube to perform a gating operation in synchronization with said second trigger signal.
Claim 3
Dependent Claim
24 words
A device as claimed in claim 1, wherein said periodic deflecting voltage applied by said first deflecting voltage generating unit is a sine wave.
Claim 4
Dependent Claim
28 words
A device as claimed in claim 1, wherein said periodic deflecting voltage applied by said deflecting voltage generating unit is adapted to apply a high-speed repetitive ramp voltage.
Claim 5
Dependent Claim
51 words
A device as claimed in claim 1, wherein said deflecting voltage applied by said second deflecting voltage generating unit is a ramp deflecting voltage and said second deflecting voltage generating unit is adapted to apply said ramp deflecting voltage to said second deflecting electrodes in synchronization with said second trigger signal.
Claim 6
Dependent Claim
30 words
A device as claimed in claim 1, wherein said streak tube comprises a vacuum container enclosing a photocathode, a mesh electrode, focusing electrodes, a microchannel plate, and a phosphor screen.
Claim 7
Dependent Claim
50 words
A device as claimed in claim 5, wherein said gate voltage generating unit is adapted to apply a gate voltage to said photocathode or said microchannel plate of said streak tube for the period of the deflection effected by said second deflecting electrodes in synchronization with said second trigger signal.
Claim 8
Dependent Claim
67 words
A device as claimed in claim 5, wherein said gate voltage generating unit is adapted to apply a gate voltage to said photocathode or said microchannel plate of said streak tube for the period of deflection effected by said second deflecting electrodes, except for a period of a return sweep by said first deflecting electrodes in synchronization with said second trigger signal and said first trigger signal.