Grating spectral analysis

A dispersive element for spectral analysis of PL. This may be as simple as a filter, but it is usually a scanning grating monochromator. For excitation spectroscopy or in the presence of much scattered light, a double or triple monochromator (as used in Raman scattering) may be required. 

We conclude this chapter by presenting several examples of deconvolution of real data. Most of these examples represent deconvolutions of data that were used as part of a spectral analysis rather than generated as deconvolution examples or tests. The examples include high-resolution grating spectra, tunable-diode-laser (TDL) spectra, a Fourier transform infrared spectrum (FTIR), laser Raman spectra, and a high-resolution y-ray spectrum. 

The Teramobile container also includes a Lidar detection chain based on a 40 cm receiving telescope, a high-resolution spectrometer equipped with a set of gratings and detectors allowing simultaneous temporal and spectral analysis of the return signal in a wavelength range between 190 nm and 2.5 pm. 

We gratefully acknowledge the help of Mr. F.C. Walls with the mass spectral analysis. Supported by NIEHS grant ES04705, NIH grant RR01614 and NSF grant DIR 8700766. 

We are grateful to Lois Kemp, Pierce Fleming, and John Loughrin for assistance and to George Lovelace for mass spectral analysis. We thank Pam Wingate for typing the manuscript. 

Acknomledgement Om of the authers (Dr. A 0 Hamed ) is grateful to the staff of the analytical laboratory for spectral analysis, especially COSY, NOESY, HMBC and HMQC of Tokyo University of Pharmacy and Life Science. 

If needed, spectral analysis of light from the output beam can be achieved using a simple monochromator with a multiwavelength detector (CCD or diode array). The spectral resolution is determined by the size of the monochromator, the width of the entrance slit, the density and order of the grating, and the distance between individual elements in the detector array. Fast temporal analysis may be achieved using a fast detector such as a streak camera with picosecond or subpicosecond temporal resolution. 

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