The new glass formulations from Kopp Glass are suitable for use in new filters to be used in civilian or military aircraft and function suitably as annunciator, indicator, and cockpit display light filter applications.
Kopp Glass, Inc., an ISO 9001:2008 certified company, announces its recent development of new glass formulations that are suitable for use in the aerospace market for Night Vision Imaging Systems (NVIS) glass filters. The new K0521 NVIS filter maintains a similar chromaticity to its incandescent filter counterpart when using specific white LEDs. Resulting filtered light chromaticity meets the MIL-STD-3009, MIL-L-85762A, and RTCA/DO-275 requirements, with corresponding night vision radiance (NRA) levels well below present standard expectations. These new filters can be used in civilian or military aircraft and function suitably as annunciator, indicator, and cockpit display light filter applications.
The NVIS application requires the minimization of radiation output from cockpit lighting and the Kopp Glass filters continue to exceed military standards with a low radiance output. Chromaticity values meet the military and civilian standard requirements when using specified white LEDs with a correlated colour temperature (CCT) range of approximately 4000-5500K.
Demands for lower weight, LED-compatible NVIS filter options were answered with the newest designs by decreasing the historical LED-compatible filter product wall thicknesses to 0.5mm. Kopp Glass is now offering the K0521 filter at a 0.5mm application thickness, along with a comparable colour option for K0525 at 2.0mm application thickness.
K0521-0.5mm filter thickness is represented by green symbols and is illustrated for an assortment of different LED designs over a CCT range of 4000-5500K.
New K0513 Green A Intruder Incandescent NVIS Filter Designed for High Color Saturation and Low Radiance:
Kopp Glass, Inc. has continued to diversify its NVIS filter solution offerings by designing an increased colour saturation Green A Intruder filter formulation. The K0513 formulation has been designed for use with an incandescent light source with a CCT in the range of 1600-2200K. The new filter design has been prepared to function at an application thickness of 1.0mm. Although the colour saturation has increased as compared to the traditional K050X filter systems, transmission remains in excess of 10% and provides decreased radiance for critical applications.
The increased colorant hue and reduced transmission versus past Intruder Green A filters makes the K0513 filter a suitable candidate for use in applications where high contrast and daylight readability are critical design considerations. These new designs demonstrate Kopp Glass’ ability to customize these critical NVIS formulations to meet an array of design requirements, without sacrificing quality or functionality.