An infrared scene projector (IRSP) that can operate at an ambient temperature lower than 190 K is developed for the hardware-in-the-loop (HIL) simulation of space-borne IR detection systems. The IRSP is composed of a visible scene generator (VSG), a visible to IR converter, and an IR projection system optimized for cryogenic environments. The core component of the IRSP is a light-driven blackbody micro cavity array (BMCA). The BMCA is a photothermal conversion device. It can transform visible light images into IR images. The BMCA can operate properly in an ultralow temperature environment, and the temperature of the BMCA is the same as the ambient temperature. This property allows the BMCA to generate IR scenes with a pure low temperature background, which is crucial for the ground testing of space-borne IR detection systems. The performance of the IRSP was tested in a vacuum cold chamber. In the cryogenic environment with an ambient temperature of 187.75K, the observed highest temperature of the generated IR scene was 426.15 K, the lowest temperature was 187.75 K, the dynamic range of the IR scene was 38.69 db, and the frame rate of the IR scene reached 76 Hz. The average visible to IR conversion efficiency of BMCA was about 10.6%∼3.1% under different ambient temperatures. The radiation spectrum of the IRSP is close to the standard blackbody radiation spectrum both in the MWIR band and the LWIR band. The IRSP has been applied in a HIL simulation test of a space-borne IR detection system.

中文翻译：

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基于光驱动黑体微腔阵列 (BMCA) 的用于低温环境的红外场景投影仪 (IRSP)

开发了一种可以在低于 190 K 的环境温度下运行的红外场景投影仪 (IRSP)，用于星载红外检测系统的硬件在环 (HIL) 仿真。IRSP 由可见场景生成器 (VSG)、可见光到红外转换器和针对低温环境优化的红外投影系统组成。IRSP 的核心组件是光驱动黑体微腔阵列 (BMCA)。BMCA 是一种光热转换装置。它可以将可见光图像转换为红外图像。BMCA 可以在超低温环境下正常运行，BMCA 的温度与环境温度相同。这一特性允许 BMCA 生成具有纯低温背景的红外场景，这对于星载红外探测系统的地面测试至关重要。IRSP 的性能在真空冷室中进行了测试。在环境温度为 187.75K 的低温环境下，观测到的生成的 IR 场景最高温度为 426.15 K，最低温度为 187.75 K，IR 场景的动态范围为 38.69 db，IR 的帧率场景达到76赫兹。BMCA在不同环境温度下的平均可见光到红外转换效率约为10.6%~3.1%。IRSP 的辐射光谱在 MWIR 波段和 LWIR 波段都接近于标准黑体辐射光谱。IRSP已应用于星载红外探测系统的HIL仿真测试。最低温度为187.75 K，红外场景的动态范围为38.69 db，红外场景的帧率达到76 Hz。BMCA在不同环境温度下的平均可见光到红外转换效率约为10.6%~3.1%。IRSP 的辐射光谱在 MWIR 波段和 LWIR 波段都接近于标准黑体辐射光谱。IRSP已应用于星载红外探测系统的HIL仿真测试。最低温度为187.75 K，红外场景的动态范围为38.69 db，红外场景的帧率达到76 Hz。BMCA在不同环境温度下的平均可见光到红外转换效率约为10.6%~3.1%。IRSP 的辐射光谱在 MWIR 波段和 LWIR 波段都接近于标准黑体辐射光谱。IRSP已应用于星载红外探测系统的HIL仿真测试。