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:
Jan. 30, 2001
Filed:
Mar. 12, 1998
Perry A. Palumbo, Gardiner, NY (US);
William L. Weber, Wallkill, NY (US);
Harold R. Van Aken, Wallkill, NY (US);
Robert K. McMahan, Mebane, NC (US);
Gretag Macbeth LLC, New Windsor, NY (US);
Abstract
A concentric spectrometer which reduces stray light and re-entrant spectra within the spectrometer. The spectrometer includes a non-direct optical path between the entrance slit assembly and exit aperture. Dyson and Offner concentric optical configurations are used to eliminate third-order aberrations The concentric optical system includes a light trap which mitigates or eliminate stray light due to reflection of light incident on the exit aperture region but which does not impinge on the active area of a detector optically coupled to the exit aperture. A two-dimensional area array detector concurrently senses a spectral signal corresponding to an input optical radiation signal and a signal corresponding to zero-input radiation, and the spectral signal is corrected according to the zero-input radiation signal.