Narrowband filters for the FUV range

	Narrowband filters for the FUV range
	Rodríguez-De Marcos, Luis; Larruquert, Juan I.; Méndez, José A.; Aznárez, José A.; Fu, Liping
	2015
会议名称	EUV and X-Ray Optics: Synergy Between Laboratory and Space IV
会议日期	April 13, 2015 - April 14, 2015
会议地点	Prague, Czech republic
英文摘要	We address the design, fabrication, and characterization of transmittance filters for the Ionosphere Photometer instrument (IP), developed by the Center for Space Science and Applied Research (CSSAR). IP, a payload of Feng-Yun 3D meteorological satellite, to be launched on 2016, is aimed to perform photometry measurements of Earth's ionosphere by the analysis of the OI (135.6 nm) spectral line and N2Lyman-Birge-Hopfield (LBH, 140-180 nm) band, both of them in the far ultraviolet (FUV) range. The most convenient procedure to isolate a spectral band is the use of tunable transmittance filters. In many applications the intensity of the ultraviolet, visible and infrared background is higher than the intensity of the target FUV lines; therefore one of the most important requirements for transmittance filters is to reject (by reflecting and/or by absorbing) as efficiently as possible the visible and close ranges. In the FUV range, (Al/MgF2)ntransmittance filters are the most common, and they are suitable to reject the visible and adjacent ranges. These materials present unique properties in this range: MgF2is transparent down to ∼115 nm and Al has a very low refractive index in the FUV that contrasts well with MgF2. Narrowband tunable filters with very low transmittance at long wavelengths are achievable. The main data on the preparation and characterization of IP filters by Grupo de Óptica de Láminas Delgadas (GOLD) is detailed. In this proceeding we present (Al/MgF2)3filters peaked at either 135.6 nm or at the center of the LBH band (∼160 nm). Filters were characterized in the 125-800 nm range (143-800 nm range for the LBH filter). After some storage in a desiccator, both coatings kept a transmittance of ∼0.14 at their target wavelengths, with visible-to-peak transmittance ratios of 1.2·10-4(OI filter) and 1.3·10-4(LBH filter). One filter tuned at each target wavelength was exposed to ∼300 Gy60Co gamma dose, with no significant transmittance change. © 2015 SPIE.
收录类别	EI
会议主办者	The Society of Photo-Optical Instrumentation Engineers (SPIE)
会议录	Proceedings of SPIE - The International Society for Optical Engineering
会议录出版者	SPIE
语种	英语
ISSN号	0277-786X
ISBN号	9781628416312
内容类型	会议论文
源URL	[http://ir.nssc.ac.cn/handle/122/5205]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Rodríguez-De Marcos, Luis,Larruquert, Juan I.,Méndez, José A.,et al. Narrowband filters for the FUV range[C]. 见:EUV and X-Ray Optics: Synergy Between Laboratory and Space IV. Prague, Czech republic. April 13, 2015 - April 14, 2015.