• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>SPIE Optical Engineering + Applications Conference >High temperature measurements of AlON using a CO_2 laser
【24h】

High temperature measurements of AlON using a CO_2 laser

机译：使用CO_2激光对AlON进行高温测量

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

IR sensors continue to be a powerful tool for a broad range of sensing applications including night vision, surveillance and other mission functions. Sensors are often exposed to challenging scenarios such as targeting under extreme conditions including detection under extremely high temperature and speed, such as in hypersonic applications. Thermal protection is vital for sensor performance under unfavorable conditions. Transparent ceramic is one of the window materials used against thermal impact due to its excellent optical transmission, transparency, and durability under extreme conditions. In this paper, we focus on investigating the behavior of Aluminum Oxynitride (AlON) optical ceramics at high temperatures. AlON has been reported to have transparency and transmission over 80% from the UV all the way to the mid-wave IR cutting off around Sum. A 25.4mm × 25.4mm × 6mm square and 1.5mm × 1.5mm × 10.16mm AlON samples were heated up to ~907K. A 50W CO_2 laser was used as a heating source for the material under test (MUT). Significant thermal distribution was measured using a long-wave IR thermal camera to observe the MUT surface. In addition, heating results show that there was severe thermal stress in the MUT. We are currently optimizing the optical beam dimensions and projection shape towards a sample in order to minimize the stress and heat towards 1273K. Finally, we validated our experimental results with thermo-optic simulations and modeling.
机译：红外传感器仍然是包括夜视，监视和其他任务功能在内的广泛传感应用的强大工具。传感器通常会遇到挑战性的场景，例如在极端条件下瞄准，包括在极高的温度和速度下进行检测，例如在超音速应用中。在不利条件下，热保护对于传感器的性能至关重要。透明陶瓷由于其优异的透光性，透明性和在极端条件下的耐用性而成为抗热冲击的窗户材料之一。在本文中，我们专注于研究氧氮化铝（AlON）光学陶瓷在高温下的行为。据报道，AlON具有透明性，并且从UV一直到Sum附近的中波IR截止都具有80％以上的透射率。将25.4mm×25.4mm×6mm的正方形和1.5mm×1.5mm×10.16mm的AlON样品加热到约907K。使用50W CO_2激光器作为被测材料（MUT）的加热源。使用长波红外热像仪测量显着的热分布，以观察MUT表面。此外，加热结果表明MUT中存在严重的热应力。我们目前正在优化朝向样品的光束尺寸和投影形状，以最大程度地减小朝向1273K的应力和热量。最后，我们通过热光模拟和建模验证了我们的实验结果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号