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:
Feb. 20, 2007
Filed:
Jul. 09, 2003
Jens Bastue, Frederiksberg, DK;
Nicolai Herholdt-rasmussen, Copenhagen, DK;
Michael Rasmussen, Bronshoj, DK;
Ole Jespersen, Vallensbæk Strand, DK;
Jens Bastue, Frederiksberg, DK;
Nicolai Herholdt-Rasmussen, Copenhagen, DK;
Michael Rasmussen, Bronshoj, DK;
Ole Jespersen, Vallensbæk Strand, DK;
Ibsen Photonics A/S, Farum, DK;
Abstract
Transmission spectrometers require low levels of background light so that the signal to noise ratio is increased, and also require stable performance over wide temperature ranges. Light reflected by the transmission grating can result in increased background levels. One approach to reducing the background level is to orient the transmissive diffraction grating so that light reflected by the grating is reflected out of the diffraction plane. The temperature-induced wavelength drift of a transmission spectrometer can be due to the frame upon which the transmission grating is mounted. The wavelength drift is reduced by allowing the thermal expansion of the grating to be independent of the frame.