TIME-MARKING HIGH-SPEED FILM IN MULTIPLE-CAMERA INSTALLATIONS

Abstract

The general time-event correlation problem for high-speed (10,000- frames/second), motion analysis cameras is discussed. The specific optics, sensitometry, and electronics problems involved in placing precise time and event marks on high-speed film, in addition to the design and development of an operational time and event signal generator, are discussed. The generator features a tuning fork time standard, integrated circuit timing logic that can furnish independent time and event signals for up to 15 cameras. A current ramp- film density wedge generator is presented as a novel method for relating time- mark lamp current amplitude to film-mark density. Recently developed, solid- state, light emitting diodes (LED) were investigated for application to the time-mark problem. The LED proved capable of providing time-marking pulses at rates in excess of 200 kHz. A technique for analyzing a waveform to operationally test the neon lamp timing circuit is evaluated.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1970
Accession Number
AD0706852

Entities

People

  • F. L. Crosswy
  • H. T. Kalb

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Air Force
  • Cameras
  • Charge Carriers
  • Integrated Circuits
  • Ionization
  • Light Emitting Diodes
  • Light Sources
  • Measurement
  • Photographic Materials
  • Photographs
  • Semiconductors
  • Signal Generators
  • Silicon Carbide
  • Standards
  • Transmission Lines
  • Tuning Forks
  • Waveforms

Fields of Study

  • Physics

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Computational Modeling and Simulation
  • Electrical Engineering

Technology Areas

  • Microelectronics