SBIR PHASE I: Holographic Grating Filters for CaII Line Imaging and Emission Spectroscopy

*** 9560496赵本小型企业创新研究一期项目将开发紧凑、低成本、超窄带宽(约0.1 A)用于CaII线（3933 A）太阳成像的全息滤光片。这解决了该波长区域窄带滤波器的关键要求，因为在蓝色到W区域难以制造Lyot和类似的干涉滤波器，具有足够的光谱分辨率和光学质量。在这个程序中，将证明使用光折变LiNbO3晶体记录高效率和低f值（f/15或更低）全息成像滤波器的可行性。在加工过的LiNbO3晶体中记录其他蓝到W波长的全息图也将被研究。该研究项目预计将产生关于在短波长记录高效率光栅的最佳材料特性和限制的数据。该技术的预期商业应用包括使用光学遥感进行太阳天文学、发射光谱和污染监测的滤光器，以及用于自由空间光通信的太阳盲滤光器。潜在的应用包括：用于光学遥感的W窄带宽滤波器；污染物、化学品、金属和矿物检测；用于自由空间光通信的太阳盲滤光器；高密度光盘和全息数据存储。＊＊＊

*** 9560496 Zhao This Small Business Innovation Research Phase I project will develop compact, low cost, ultra-narrow bandwidth (approx. O.1 A) holographic filters for solar imaging at the CaII line (3933 A). This addresses a key requirement for narrow band width filters in this wavelength region because of the difficulty in fabricating Lyot and similar interference filters with sufficient spectral resolution and optical quality in the blue to W region. In this program, the feasibility of recording high efficiency and low f-number (f/15 or lower) holographic imaging filters using photorefractive LiNbO3 crystals will be demonstrated. Recording holograms at other blue to W wavelengths in processed LiNbO3 crystals will also be investigated. This research program is expected to produce data on the optimum material characteristics and limits of recording high efficiency gratings at short wavelengths. Anticipated commercial applications of this technology include filters for solar astronomy, emission spectroscopy and pollution monitoring using optical remote sensing, and solar blind filters for free-space optical communication. Potential applications include: W narrow bandwidth filters for optical remote sensing; pollutant, chemical, metal, and mineral detection; solar-blind filters for free-space optical communications; high density optical disks and holographic data storage. ***