Variable Focus Adapter

Abstract

A variable focus adapter is disclosed that comprises the combination of a lens and an aperture provided by a plate all lodged in a housing that is placed so that the lens is in proximity with each objective lens of a binocular arrangement to change the focal range from greater than 20 ft. to seven (7) ft. with a depth of field spanning from 5 to 15 ft.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1997
Accession Number
ADD019853

Entities

People

  • James B. Sheehy
  • John J. Sprenger
  • Kenneth W. Gish
  • William H. Finkbeiner Jr

Organizations

  • Naval Air Warfare Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Aerial Warfare
  • Aircrafts
  • Binoculars
  • Department Of Defense
  • Diameters
  • Information Operations
  • Infrared Spectra
  • Integrals
  • Inventions
  • Law
  • Maryland
  • Night Vision
  • Optical Instruments
  • Patents
  • Spectra
  • United States

Fields of Study

  • Physics

Readers

  • Electrical Engineering
  • Theoretical Analysis.
  • Vision Science/Vision Psychology/Cognitive Neuroscience.