Accession Number : ADP006397

Title :   Fixed Wing Night Attack EO Integration and Sensor Fusion,

Corporate Author : IBIS AEROSYSTEMS LTD BEDFORD (UNITED KINGDOM)

Personal Author(s) : Evans, Les

Report Date : DEC 1991

Pagination or Media Count : 5

Abstract : The introduction of NVGs and FLIR into fast jet aircraft has not been achieved without some problems being encountered. Amongst these problems some in particular relate to the integration between the NVGs and the FLIR image as projected onto the head up display, and these are addressed here. It was found that when the pilot was presented with two images of the outside scene produced by sensors operating at different wavelengths he could find the resulting combination of images to be very hard to comprehend. This problem of Sensor Fusion was most noticeable where folded-optics NVGs were used, and it was overcome by causing the NVGs to be switched off automatically when they were pointed at the HUD. Problems of sensor fusion were not normally encountered when straight-through NVGs were used. Other integration problems encountered were those of ensuring that HUD symbology was given sufficient contrast relative to the FLIR video, and that the relative brilliance of the HUD symbology was easily controlled by the pilot. Some particular aspects of NVG use in fast-jet aircraft are discussed. It was found that helmet fit had to be tight to ensure that the high helmet-rotational forces produced by normal acceleration were contained, and also that when wearing NVGs whilst pulling g a tumbling sensation could be induced in the pilot by head movements.

Descriptors :   *HEAD UP DISPLAYS, *FORWARD LOOKING INFRARED SYSTEMS, *NIGHT VISION DEVICES, HELMETS, IMAGES, JET AIRCRAFT, PILOTS, ELECTROOPTICS, CONTRAST, OPTICAL IMAGES, GOGGLES.

Subject Categories : Optical Detection and Detectors
      Infrared Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE