Accession Number : AD0856263

Title :   Electronic Pre-Conditioning of Signal Inputs to an Optical Data Processor.

Descriptive Note : Master's theses,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Vandeventer, Thomas Wayne

Report Date : MAR 1969

Pagination or Media Count : 30

Abstract : A technique was developed to linearize the process of recording data on photographic film by use of diode function generators. A transfer curve showing the required relationship between signal voltage and modulating voltage was graphically determined and programmed on the diode function generator section of an analog computer. The validity of the technique was checked by plotting amplitude transmittance of a developed transparency versus the signal voltage applied to the light modulator during the recording. Data at temporal frequencies up to 100 Hz was recorded both with and without signal conditioning, and the results were analyzed. A power spectral density analysis of these recordings showed far less harmonic distortion in the recordings for which conditioning was used. (Author)

Descriptors :   (*PHOTOGRAPHIC RECORDING SYSTEMS, DATA PROCESSING), (*DATA PROCESSING, OPTICAL EQUIPMENT), ELECTROOPTICS, PHOTOGRAPHIC IMAGES, LINEAR SYSTEMS, POWER SPECTRA, PHOTOGRAPHIC FILM, THESES.

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE