Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1997-06-27
1999-11-30
Hantis, K. P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01J 328
Patent
active
059952210
ABSTRACT:
A modified concentric spectrograph for diffracting light with high stray light rejection without astigmatism is provided. The modified spectrograph includes a grating, a lens, and at least one entrance port and one exit port. The grating has a concave surface and a meridian plane with a first side and a second side. The lens has a substantially planar surface and a convex surface. Preferably, the convex and concave surfaces are substantially concentric. The ports are substantially located on different sides of the meridian plane near a focal plane of the spectrograph. The position of a focal plane may be modified using an optically transmissive triangular prism with a reflective surface, and an optically transmissive block. The position of a focal plane may further be modified with one or more optically transmissive plates. Methods for using the spectrograph are also provided.
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Goldstone Jeremy J.
Jiang Wu
Millet Viviane D.
Slutter Warren S.
Thevenon Alain F. R.
Alten Brett G.
Hantis K. P.
Ingerman Jeffrey H.
Instruments S.A., Inc.
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