Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 49,
  • Issue 8,
  • pp. 1199-1200
  • (1995)

New Scanning Beam Technique for Raman Spectroscopy

Not Accessible

Your library or personal account may give you access

Abstract

Two general solutions are applied to avoid strong heating effects in Raman scattering of highly absorbing materials. They are both based on the same principle of moving the focus spot relative to the sample surface, which decreases the illumination time per sample volume. The first way is a fast movement of the sample, as is realized in the most popular technique by sample rotation, but it is obvious that this method is difficult to apply in a wide temperature and pressure range. The second way offers a solution for applications in temperature and pressure cells by scanning the beam across a fixed sample. Here we found two realizations in the literature. One method is to move a lens in an optical system in backscattering geometry. It moves the focus across the sample by moving a lens and using an off-axis beam. This arrangement cannot use the whole aperture of the monochromator, so that it is characterized by decreasing intensity and resolution. The other method is scanning the focus across the surface of a sample by using a rotating refractor plate. Here the disadvantages are, first, the astigmatism of the focus and, second, the change of the image on the entrance slit while the plate is tilted. In order to investigate highly viscous liquids and glass transition phenomena in a wide temperature range, we developed a new technique, which is moving the laser beam by a rotating mirror.

PDF Article
More Like This
Surface-scanning technique for Raman spectroscopy of highly colored crystals

J. A. Koningstein and B. F. Gächter
J. Opt. Soc. Am. 63(7) 892-893 (1973)

Rapid Scanning Raman Spectroscopy

Michel Delhaye
Appl. Opt. 7(11) 2195-2199 (1968)

New scanning technique for the optical vortex microscope

Ireneusz Augustyniak, Agnieszka Popiołek-Masajada, Jan Masajada, and Sławomir Drobczyński
Appl. Opt. 51(10) C117-C124 (2012)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved