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

*9560496赵这个小型企业创新研究第一阶段项目将开发紧凑型、低成本、超窄带宽(约O.1 A)用于CAII线太阳成像的全息滤光片(3933 A)。这解决了在该波长区域中对窄带宽滤光片的关键需求，因为在蓝至W区域制造具有足够光谱分辨率和光学质量的Lyot和类似干涉滤光片是困难的。在这个项目中，将论证用光折变LiNbO_3晶体记录高效率和低f数(f/15或更低)全息成像滤光片的可行性。还将研究在经过处理的LiNbO_3晶体中记录其他蓝至W波长的全息图。这项研究计划有望产生关于记录短波长高效率光栅的最佳材料特性和极限的数据。这项技术的预期商业应用包括用于太阳天文、利用光学遥感的发射光谱和污染监测的滤光片，以及用于自由空间光通信的日盲滤光片。潜在的应用包括：用于光学遥感的W窄带滤光片；污染物、化学、金属和矿物探测；用于自由空间光通信的日盲滤光片；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. ***