REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

TOPINS-SOFTWARE SOLUTION FOR MEASURING OPTICAL DISTORTION

MILAN BOJANOVIĆ

CPS-CAD Professional Sys., Belgrade, e-mail: milan@cadpro.co.rs

Aleksandar Mandić

CPS-CAD Professional Sys., Belgrade, e-mail: aleksandar@cadpro.co.rs

Stefan JankoviĆ

University of Belgrade, Faculty of Mathematics, Belgrade, e-mail: stefan.p.jankovic@gmail.com

Abstract: Optical characteristic measurements have become very important for modern aircraft transparencies. Halation (haze, scatter, and glare), crazing, birefringence, reflections, distortion and angular deviation are of extreme importance for the aircraft equipped with Head-Up Displays (HUD). HUD may require stringent control over the optics of the portion of the transparency (windscreen or canopy) which lies between the HUD combining glass and the external environment. In this paper we describe software solution for automatic measuring distortion for aircraft transparencies. Measurement of angular deviation/distortion is calculated in accordance to ASTM Standard Method (ASTM F 733 – 90). This solution has been tested and successfully verified on the example of the airplane GALEB G-4 windshield and canopy.

Keywords: Optical inspection – distortion - transparencies