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毫米波光栅谱仪分辨率的研究
EFFECT OF LARGE SPHERICAL REFLECTOR ON RESOLVING POWER OF GRATING SPECTROMETER
【摘要】 对具有一定入射角的波束经球面镜聚焦后焦点区域场的分布进行理论计算与实验测试,结果表明:在毫米波光栅谱仪(25~100GHz)中大球面镜聚焦系统明显限制了频谱分辨率.增大光栅对波束的衍射角是减小和消除这一限制的有效方法.
【Abstract】 The field distributions of the focal region, where the beam with a certain incidentangle is focused by the spherical reflector, are theoretically calculated and measured. Theresults give evidence that the focusing system of the spherical reflector in gratingspectrometer for millimeter waves (25~100GHz) strongly limits its resolving power. In-creasing the diffraction angles of the diffracted beam from a grating is an effective way toabate or eliminate this limit.
【关键词】 毫米波;
光栅谱仪;
分辨率;
聚焦场;
积分法;
【Key words】 millimeter waves; grating spectrometer; resolving power; focal field; integration method.;
【Key words】 millimeter waves; grating spectrometer; resolving power; focal field; integration method.;
- 【文献出处】 红外与毫米波学报 ,Journal Infrared Millimeter and Waves , 编辑部邮箱 ,1992年06期
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