Grating spectrometer

Details Grating spectrometer Grating spectrometer

1989-08-24

1991-03-05

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

250339, G01J 318

Patent

active

049972812

ABSTRACT:
An improved flat field grating spectrometer for increasing the spectral resolutiion and usable spectral range. The spectrometer comprises an entrance slit or port, a concave grating, a field flattening lens and detection means encompassing the desired spectral region and capable of providing separate measurements between different regions of the spectral image plane. A second embodiment provides a beam splitter (dichroic or neutral density) placed between the grating and the detector to divert a portion of the energy at selected wavelengths through a second field flattening lens to a second detection means.

REFERENCES:
patent: 3794407 (1974-02-01), Nishimura
patent: 4036558 (1977-07-01), Pouey
patent: 4264205 (1981-04-01), Landa
patent: 4285596 (1981-08-01), Landa
patent: 4568187 (1986-02-01), Kita et al.
patent: 4636074 (1987-01-01), Levy et al.
patent: 4650321 (1987-03-01), Thompson
patent: 4718762 (1988-01-01), Wiget et al.
patent: 4844617 (1989-07-01), Kelderman et al.
Lasalle et al., Optics Communications, vol. 17, No. 3, Jun. 1976, pp. 326-327.

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