Optical waveform observing apparatus

Details Optical waveform observing apparatus Optical waveform observing apparatus

1988-12-29

1990-07-31

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

313529, H01J 3150

Patent

active

049452240

ABSTRACT:
Optical waveform observing apparatus including a sampling streak tube to which is applied an incident light beam having a waveform to be observed. An electron beam corresponding to the incident light beam is repetitively deflected in the streak tube, in response to a repetitive deflecting trigger signal, to sample the electron beam. The repetitive deflection of the electron beam is periodically stopped for a first time period. An integration circuit integrates data outputted by the streak tube. A subtraction circuit subtracts the integration of streak tube data outputted during the first time period from the integration of streak tube data outputted during a second time period when the repetitive beam deflection is not stopped, so that background noise and dark currents are not included in the subtraction result.

REFERENCES:
patent: 4645918 (1987-02-01), Tsuchiya et al.
patent: 4694154 (1987-09-01), Tsuchiya et al.
patent: 4740685 (1988-04-01), Koishi
patent: 4801796 (1989-01-01), Kinoshita et al.
Tsuchiya, Y. et al., "High Speed Photography, Videography, and Photonics V", Proceedings of the SPIE, vol. 832, pp. 227-234, Aug. 1987.

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