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    • 4. 发明授权
    • Optical accessory for variable angle reflection spectroscopy
    • 用于可变角度反射光谱的光学附件
    • US5262845A
    • 1993-11-16
    • US894991
    • 1992-06-08
    • Milan MilosevicNicolas J. Harrick
    • Milan MilosevicNicolas J. Harrick
    • G01J3/02G01J3/42G01N21/47G01N21/01
    • G01N21/474G01J3/02G01J3/0216G01J3/0237G01J3/0291G01J3/42
    • A variable angle reflection accessory for use in reflection spectrometry characterized by a pair of fixed ellipsoidal reflectors positioned inside an enclosure adjacent a sample surface on the outside of the enclosure and a pair of rotatable plane mirrors positioned at opposite sides of the sample surface. The spectrometer beam is brought to a focus at the first plane mirror, from which it is reflected off the first ellipsoidal reflector to a focus at the sample surface. The reflected beam follows a corresponding path back to the spectrometer. Rotating the mirrors in unison causes the beam angle of incidence on the sample surface to vary over a wide range while maintaining optical alignments and continuing to center the radiation on the same sample area. The outside positioning of the sample surface allows the accessory to be easily coupled to a purge port of the spectrometer and allows rapid sample exchanges without breaking the purge atmosphere.
    • 一种用于反射光谱测定的可变角度反射附件,其特征在于,一对固定的椭圆体反射器位于外壳附近的外壳附近的外壳上的样品表面和位于样品表面的相对侧的一对可旋转的平面镜。 光谱仪光束在第一平面镜处被聚焦,从第一平面反射镜将其从第一椭圆反射器反射到样品表面处的焦点。 反射光束跟随相应的路径回到光谱仪。 一致地转动反射镜导致样品表面上的光束入射角在宽范围内变化,同时保持光学对准并且继续将辐射对准在相同的样品区域上。 样品表面的外部定位允许附件容易地耦合到光谱仪的吹扫端口,并允许快速的样品交换而不破坏吹扫气氛。