Lens for a FT-raman microscope

Details Lens for a FT-raman microscope Lens for a FT-raman microscope

1993-12-10

1996-02-20

Dzierzynski, Paul M.

Optical: systems and elements

Compound lens system

Microscope

359355, 356301, G02B 2100, G02B 1314, G01J 344

Patent

active

054934435

ABSTRACT:
In a Raman microscope, in particular for a Fourier transform (FT) spectrometer with a lens for magnified imaging of a point-shaped region (1) on a surface of a measuring sample (2) and with a laser for irradiating laser radiation onto the point-shaped region (1), the laser radiation is in the infrared (IR), preferentially in the near-infrared (NIR) region and the lens is a Cassegrain mirror-lens (3, 4) with a convex mirror (3) arranged rotationally symmetrically to an optical axis (5) and with a concave mirror (4) which is likewise rotationally symmetric to the optical axis (5) of the lens, whereby the focal point of the concave mirror (4), lying on the optical axis (5), coincides with the point-shaped region (1) on the surface of the measuring sample (2). In this fashion distortion-free NIR Raman spectra can be taken with simple optical elements.

REFERENCES:
patent: 2661658 (1953-12-01), Dyson
patent: 4594509 (1986-06-01), Simon et al.
patent: 4758088 (1988-07-01), Doyle
"Holographic Optical Components for Laser Spectroscopy Applications" from Harry Owen, distributed on the conference Holographics International '92 Jul. 26th to 29th 1992, London, England.
FT-Raman Microscopy: Discussion and Preliminary Results vol. 43, No. 1, 1989, pp. 11 to 15.

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