Acousto-Optic Filters McCreery, R. L., Raman Spectroscopy for Chemical Analysis, 3rd ed., Wiley, New York: 2000 Wavelength tuning over entire Raman shift.

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Presentation transcript:

Acousto-Optic Filters McCreery, R. L., Raman Spectroscopy for Chemical Analysis, 3rd ed., Wiley, New York: 2000 Wavelength tuning over entire Raman shift range. Wavelength tuning over entire Raman shift range. TeO 2 crystal is excited acoustically with ultrasonic generator. => Standing wave pattern acts as diffraction grating. TeO 2 crystal is excited acoustically with ultrasonic generator. => Standing wave pattern acts as diffraction grating. Spectrum is scanned by changing ultrasonic frequency in less than 1 s over 0 to 3500 cm -1 shift range. Spectrum is scanned by changing ultrasonic frequency in less than 1 s over 0 to 3500 cm -1 shift range.

Acousto-optic Tunable Filter

Confocal Microscopy Optics McCreery, R. L., Raman Spectroscopy for Chemical Analysis, 3rd ed., Wiley, New York: 2000

Confocal Aperture and Field Depth McCreery, R. L., Raman Spectroscopy for Chemical Analysis, 3rd ed., Wiley, New York: 2000 a nd McCreery, R. L., Raman Spectroscopy for Chemical Analysis, 3rd ed., Wiley, New York: 2000 a nd

Confocal Aperture and Field Depth McCreery, R. L., Raman Spectroscopy for Chemical Analysis, 3rd ed., Wiley, New York: 2000

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