12 July 2000 Development of a two-color projection system for the KHILS Vacuum Cold Chamber (KVACC)
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The KHILS Vacuum Cold Chamber (KVACC) was developed to provide the capability of performing hardware-in-the-loop testing of infrared seekers requiring scenes involving cold backgrounds. Being able to project cold backgrounds enables the projector to simulate high-altitude exoatmospheric engagements. Previous tests with the KVACC projection system have used only one resistive-array projection device. In order to realistically stimulate a 2-color seeker, it is necessary to project in two, independently controlled IR bands. Missile interceptors commonly use two or more colors; thus, a 2-color projection capability has been developed for the KVACC system. The 2- color projection capability is being accomplished by optically combining two Phase 3 WISP arrays with a dichroic beam combiner. Both WISP arrays are cooled to user-selected temperatures ranging from ambient temperature to below 150 K. In order to test the projection system, a special-purpose camera has also been developed. The camera is designed to operate inside the vacuum chamber. It has a cooled, all- reflective broadband optical system to enable the measurement of low radiance levels in the 3 - 12 micrometer spectrum. Camera upgrades later this year will allow measurements in two independent wavebands. Both the camera and the projector will be described in this paper.
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David S. Flynn, David S. Flynn, Steven Arthur Marlow, Steven Arthur Marlow, James R. Kircher, James R. Kircher, Eric W. Glattke, Eric W. Glattke, Robert Lee Murrer, Robert Lee Murrer, John S. Weir, John S. Weir, } "Development of a two-color projection system for the KHILS Vacuum Cold Chamber (KVACC)", Proc. SPIE 4027, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing V, (12 July 2000); doi: 10.1117/12.391692; https://doi.org/10.1117/12.391692

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