Design And Operation Of A Time-Gated Optical System For Measuring The Angular Distribution Of Light Emitted From Laser Targets

L. W. Miller; H. W. Kruse; P. J. Kruse; D. E. Bartram; N. M. Hoffman; J. M. Mack

doi:10.1117/12.957784

13 November 1980 Design And Operation Of A Time-Gated Optical System For Measuring The Angular Distribution Of Light Emitted From Laser Targets

L. W. Miller, H. W. Kruse, P. J. Kruse, D. E. Bartram, N. M. Hoffman, J. M. Mack

Author Affiliations +

Proceedings Volume 0190, Los Alamos Conference on Optics 1979; (1980) https://doi.org/10.1117/12.957784
Event: Los Alamos Conference on Optics '79, 1979, Los Alamos, United States

Abstract

We describe an optical system which produces two simultaneous, time-gated, magnified images of the back-side of a planar laser target. The two views of the target are from different directions relative to the target normal but may be chosen to be at the same angle relative to the direction of incidence of the laser beam so as to permit cancellation of any angular correlation relative to the laser beam direction. The two images are amplified by a time-gated channel-plate intensifier (CPI) and recorded on 35 mm film. This device permits measurement of the angular distribution relative to the target normal of light emitted from the back-side of laser targets as a function of time relative to the start of the laser pulse; such measurements are required in an experiment described in the report, "The Limb-Darkening Opacity Experiment Using a Laser-Heated Plasma," LA-7484-MS. We describe the operation of the device and discuss an important instrumental effect due to non-simultaneous gating of different portions of the CPI tube whereby an incorrrect angular distribution can be obtained. We discuss precautions necessary to insure that this does not occur. Samples of data will be presented.

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L. W. Miller, H. W. Kruse, P. J. Kruse, D. E. Bartram, N. M. Hoffman, and J. M. Mack "Design And Operation Of A Time-Gated Optical System For Measuring The Angular Distribution Of Light Emitted From Laser Targets", Proc. SPIE 0190, Los Alamos Conference on Optics 1979, (13 November 1980); https://doi.org/10.1117/12.957784

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