Accession Number:

ADA137521

Title:

Objective Techniques and Instrumentation for the Inspection of Fire Control Systems

Descriptive Note:

Final rept.

Corporate Author:

ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL NJ PRODUCT ASSURANCE DIRECTORATE

Personal Author(s):

Report Date:

1984-01-01

Pagination or Media Count:

20.0

Abstract:

Currently, the image quality of optical instruments is assessed by human observers and resolution targets. This technique creates problems because it is subjective and may cause disputes in borderline situations. An alternative method that would yield an objective evaluation was considered necessary to avoid the problems associated with standard resolution charts. A program was established to evaluate the modulation transfer function MTF of the U.S. Army issue binocular model M19. The MTF of the instruments and the resolution measurements were to be compared in an attempt to correlate the results. Initial findings, together with the results from a similar project conducted in the United Kingdom, showed that no correlation existed between the two test methods. The possible explanation for this result is that the human observer is coherently coupled to the optical instrument and the eye, as part of the optical system, can compensate for aberrations within the instrument under test. For this reason the MTF was not considered a viable alternative to the present method of using a human observer and resolution targets.

Subject Categories:

  • Anatomy and Physiology
  • Test Facilities, Equipment and Methods
  • Optical Detection and Detectors
  • Fire Control and Bombing Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE