光谱仪光源双光束准直的自由曲面透镜

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	光谱仪光源双光束准直的自由曲面透镜
	王晓朵; 刘华; 李云鹏; 全向前; 卢振武
刊名	光子学报
	2016
卷号	45 期号:8 页码:38-43
关键词	近红外光谱仪自由曲面双光束准直偏微分方程组荣格库塔法
ISSN号	1004-4213
其他题名	Freeform lens for two beam collimating of a spectrometer source
通讯作者	刘华
产权排序	1
中文摘要	为了使光谱仪在分辨率基本不变的同时增宽工作光谱范围,利用非成像原理设计了自由曲面透镜,将光源发出的宽工作谱段的光束准直为两束波长不同、方向不同的平行光,实现了探测器上光谱的折叠分布。首先,根据两束入射光线经自由曲面折射前、后的矢量关系,建立自由曲面上点坐标的一阶偏微分方程组;然后,采用Runge-Kutta法对偏微分方程组进行数值差分求解,得到自由曲面离散采样点,进而构建得到自由曲面透镜,导入ZEMAX软件中对光源的双光束准直进行模拟,在Tracepro软件中进行光线追迹分析其照度分布;最后,将自由曲面透镜应用于近红外光谱仪中,通过设计的自由曲面透镜将波段为800~2400nm的光源准直为两束波长分别为800~1600nm和1600~2400nm的方向不同的平行光束,经单个光栅色散后由成像透镜组成像在探测器表面,形成两组相互平行且首尾相连的折叠光谱,光谱仪的分辨率优于10nm。结果表明,采用该自由曲面透镜可以同时实现光谱仪的高分辨率和宽工作光谱范围,且使光谱仪的结构更加紧凑。
英文摘要	To extend the working spectral range of spectrometer while keeping the resolution the same, a freeform lens is designed, which can collimate the broadband source light into two beams with different wavelengths in different direction, to achieve the spectrum-fold on a two dimension array detector. First of all, a first-order partial differential equations set is obtained according to the vector relationship between the incident rays and the refractive rays on the freeform surface. Then Runge-Kutta methods is adopted to get the numerical solution of the partial differential equations which are the discrete points of the freeform surface, and the freeform lens is constructed by CAD software. The two beam collimating of the source is simulated in ZEMAX software, and the irradiance maps of the two collimated beams are simulated in Tracepro software. Finally, the freeform lens is applied to a spectrometer to collimate a source with wavelength ranging from 800 nm to 2400 nm into two beams with wavelength from 800 nm to 1600 nm and from 1600 nm to 2400 nm in different direction. After being dispersed by one grating and focused by imaging lens, two paralle and end to end spectra are distributed in the detector, and the spectral resolution is better than 10nm. The simulation results shows that, by using this kind of freeform lens, both high resolution and wide working wavelength range can be achieved in one spectrometer, and the structure of the spectrometer becomes much more compact.
收录类别	EI ; CSCD
语种	中文
CSCD记录号	CSCD:5791297
内容类型	期刊论文
源URL	[http://ir.sia.cn/handle/173321/18850]
专题	沈阳自动化研究所_光电信息技术研究室
推荐引用方式 GB/T 7714	王晓朵,刘华,李云鹏,等. 光谱仪光源双光束准直的自由曲面透镜[J]. 光子学报,2016,45(8):38-43.
APA	王晓朵,刘华,李云鹏,全向前,&卢振武.(2016).光谱仪光源双光束准直的自由曲面透镜.光子学报,45(8),38-43.
MLA	王晓朵,et al."光谱仪光源双光束准直的自由曲面透镜".光子学报 45.8(2016):38-43.