Parabolic focusing apparatus for optical spectroscopy

Details Parabolic focusing apparatus for optical spectroscopy Parabolic focusing apparatus for optical spectroscopy

1981-08-31

1984-09-25

McGraw, Vincent P.

Optics: measuring and testing

Sample, specimen, or standard holder or support

356 73, G01N 2101

Patent

active

044732953

ABSTRACT:
An accessory for optical spectroscopy is disclosed which combines a matched pair of off-axis paraboloid reflecting surfaces having their focal points at a common location on the reflecting surface of a sample. The entering and exiting beams are collimated. Preferably the paraboloid reflecting surfaces have co-linear, anti-parallel axes, and are part of a unitary structure which is rotatable around the collimated optical beam axis to vary the angle of incidence on the sample without altering the optical alignment, thereby allowing the specular reflectance component to be included or excluded, at will.

REFERENCES:
patent: 3240111 (1966-03-01), Sherman et al.
patent: 3491366 (1970-01-01), Harrick
patent: 3958882 (1976-05-01), Gast
patent: 4109149 (1978-08-01), Abel et al.
Gast et al., "An Amplitude Fourier Spectrometer for Infrared Solid State Spectroscopy", Optics Communications, vol. 8, No. 1, pp. 26-30, May 1973.

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