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:
Apr. 19, 2016
Filed:
Jan. 18, 2013
Lc-tec Displays Ab, Borlänge, SE;
Jesper Osterman, Falun, SE;
Terry J. Scheffer, Hilo, HI (US);
LC-TEC Displays AB, Borlänge, SE;
Abstract
An optical shutter () includes a wavelength selective polarizing filter () in optical association with a liquid crystal polarization modulator () to rapidly switch between optical states to alternately transmit visible radiation and near infrared radiation. The wavelength selective polarizing filter is constructed to impart a polarization state to incident radiation and transmit polarized radiation within at least the visible wavelength region of the electromagnetic spectrum. The liquid crystal polarization modulator is positioned to receive incident radiation for internal propagation through the liquid crystal polarization modulator and is responsive to a first value and a second value of an applied control signal () to switch the internally propagating radiation to, respectively, a first polarization state and a second polarization state. The switching between the first and second polarization states produces, in cooperation with the wavelength selective polarizing filter, optical shutter output radiation in different wavelength regions of the electromagnetic spectrum.