A NEW LOGARITHMIC PHOTOMETER

Abstract

A commonly used logarithmic photometer chassis employs 4 cut-in diodes to convert the quasilogarithmic function to a true logarithmic function. With 4 cut-in diodes this conversion can only be completely accomplished at 5 points in the complete dynamic range. A technique was developed allowing conversion of quasilogarithmic data to true logarithmic form to 21 points over the dynamic range. The circuitry described is applicable to multiple phototubes and photographic photometry. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1960
Accession Number
AD0271094

Entities

People

  • Richard L. Ensinger

Tags

DTIC Thesaurus Topics

  • Conversion
  • Dynamic Range
  • Photometers
  • Photometry
  • Phototubes

Readers

  • Calculus or Mathematical Analysis
  • Integrated Circuit Design and Technology.
  • Spectroscopy.