• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Conference on ground-based and airborne instrumentation for astronomy IV >Methods for evaluating the performance of volume phase holographic gratings for the VIRUS spectrograph array
【24h】

Methods for evaluating the performance of volume phase holographic gratings for the VIRUS spectrograph array

机译：用于评估VIRUS光谱仪阵列的体积相位全息光栅性能的方法

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

摘要

The Visible Integral field Replicable Unit Spectrograph (VIRUS) is an array of at least 150 copies of a simple, fiber-fed integral field spectrograph that will be deployed on the Hobby-Eberly Telescope (HET) to carry out the HET Dark Energy Experiment (HETDEX). Each spectrograph contains a volume phase holographic grating as its dispersing element that is used in first order for 350 & λ(nm) & 550. We discuss the test methods used to evaluate the performance of the prototype gratings, which have aided in modifying the fabrication prescription for achieving the specified batch diffraction efficiency required for HETDEX. In particular, we discuss tests in which we measure the diffraction efficiency at the nominal grating angle of incidence in VIRUS for all orders accessible to our test bench that are allowed by the grating equation. For select gratings, these tests have allowed us to account for & 90% of the incident light for wavelengths within the spectral coverage of VIRUS. The remaining light that is unaccounted for is likely being diffracted into reflective orders or being absorbed or scattered within the grating layer (for bluer wavelengths especially, the latter term may dominate the others). Finally, we discuss an apparatus that will be used to quickly verify the first order diffraction efficiency specification for the batch of at least 150 VIRUS production gratings.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
机译：可见的整体场可复制单位光谱仪（病毒）是一个至少150个简单的光纤积分场光谱仪的阵列，该阵列将在业余爱好望远镜（HET）上部署，以执行HET暗能实验（ hetdex）。每个光谱仪包含体积相位全息光栅，作为其分散元件，其在一开始350℃下使用。 ＆lambda;（nm）＆lt; 550.我们讨论了用于评估原型光栅性能的测试方法，该试验方法辅助改变制造处方，以实现Hetdex所需的特定批量衍射效率。特别地，我们讨论了我们在光栅方程所允许的所有订单中测量病毒中标称光栅入射角的衍射效率的测试。对于选择的光栅，这些测试使我们允许我们解释＆lt;在病毒的光谱覆盖范围内的波长内的90％的入射光。未占用的剩余光可能被衍射到反射顺序或被吸收或散射在光栅层内（特别是对于布鲁尔波长，尤其是后者术语可以占主导地位）。最后，我们讨论了一种将用于快速验证至少150个病毒生产光栅的一阶衍射效率规范的装置。©（2012）照片光学仪表工程师（SPIE）的版权协会。仅供个人使用的摘要下载。

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