High sensitivity optical system of DOAS analyzer
A high-sensitivity, optical system technology, applied in the measurement of color/spectral characteristics, etc., can solve the problems of low sensitivity and measurement accuracy of DOAS analyzers, optical design without considering chromatic aberration correction, short service life of light sources, etc., to eliminate chromatic aberration problems, The effect of improved sensitivity and long service life
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[0020] figure 1 It is a schematic diagram of the optical path of an embodiment of the optical system of the present invention, and the light source 1 is a deuterium lamp.
[0021] Such as figure 1 , the optical axis 11 of the collimating lens group 3 and the optical axis 12 of the focusing lens group 7 perpendicularly intersect to form an optical axis intersection point O. Both the collimating lens group 3 and the focusing lens group 7 are composed of two large and small lenses coaxially assembled at a certain distance, but the distances between the large and small lenses of the two lens groups are different. Each lens in the above two lens groups is composed of a JGS1 fused silica meniscus lens of the same diameter and an ultraviolet-grade calcium fluoride double-convex lens, and is fixed into one body through a spacer; the beam splitter 4 is made of quartz glass with a certain thickness The base is coated with a reflective film on one side. Such as figure 1 As shown, ...
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