The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 2000
Filed:
Aug. 11, 1997
Meinrad Machler, Ellwangen, DE;
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A spectroscopic system for the analysis of small quantities of substances makes use for the purposes of energy transfer of cone-shaped aperture changers which are arranged in the object zone between the light source and the sample and, during absorption measurements, also between the sample and the inlet slot of a spectrometer. A microcell system is provided in the object space. The microcell system comprises a cylindrical cell tube with a hollow core for receiving a sample liquid. The cell tube and the sample liquid being adjustable with respect to the refractive index such that they act as a step waveguide for radiation, the sample liquid forming the core and the wall of the cell tube forming the sheath of the step waveguide.