Accession Number : ADA306571

Title :   ANVIS Objective Lens Depth of Field.

Descriptive Note : Final rept.,

Corporate Author : ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL

Personal Author(s) : McLean, William E.

PDF Url : ADA306571

Report Date : MAR 1996

Pagination or Media Count : 45

Abstract : Users of the AN/AVS-6 Aviator Night Vision Imaging System (ANVIS) need to know the minimum required distance for focusing the objective lenses to obtain infinity focus. With the increasing use of eye lanes to focus night vision devices, many users have the impression that 20 or 30 feet is 'optical infinity' for the eyes as well as the ANVIS. Depth of field of a night imaging device is especially important to infantry soldiers. If a soldier focuses at infinity, near objects will be out of focus and vice versa. This study describes the ANVIS depth of focus using photographic techniques and provides data on changes in resolution with different viewing and focused distances (i.e., resolution vs. different amounts of defocus).

Descriptors :   *FOCUSING, *NIGHT VISION DEVICES, .

Subject Categories : Optical Detection and Detectors
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE