Sean R Samuelson

US Patent:

20110194117, Aug 11, 2011

Filed:

Jan 11, 2010

Appl. No.:

13/123683

Inventors:

Huikai Xie - Gainesville FL, US
Andrea Pais - Columbia MD, US
Lei Wu - Covina CA, US
Sean Robert Samuelson - Gainesville FL, US
Shuguang Guo - Guangdong, CN

Assignee:

UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC. - Gainesville FL

International Classification:

G01J 3/45
G01J 3/08

US Classification:

356452

Abstract:

Methods and designs for providing reduced sensitivity to mirror tilt in Fourier transform spectrometers are disclosed. According to an embodiment for two-directional tilt compensation, the FT spectrometer can include a beam splitter positioned to receive an incoming beam from a light source and split the incoming beam into a first sub-beam and a second sub-beam, a corner-cube retroreflector positioned to receive the first sub-beam from the beam splitter, a dual reflective mirror positioned to receive the first sub-beam from the corner-cube retroreflector at one surface and the second sub-beam at the other surface. An optical path delay can be created using a set of mirrors, tilting the beam splitter and/or a glass cube.

US Patent:

20110139990, Jun 16, 2011

Filed:

Aug 4, 2009

Appl. No.:

12/989871

Inventors:

Huikai Xie - Gainesville FL, US
Lei Wu - Gainesville FL, US
Andrea Pais - Gainesville FL, US
Sean Robert Samuelson - Gainesville FL, US

Assignee:

University of Florida Research Foundation, Inc. - Gainesville FL

International Classification:

G01N 21/35
G01J 3/45

US Classification:

250353, 356451

Abstract:

A MEMS-based Fourier Transform (FT) spectrometer is provided. According to an embodiment, the MEMS-based FT spectrometer is an FT infrared (FTIR) spectrometer. The FT spectrometer can include a beam splitter positioned to receive an incoming beam from a light source and split the incoming beam into a first sub-beam and a second sub-beam, a fixed mirror positioned to receive the first sub-beam from the beam splitter, a scanning MEMS mirror positioned to receive the second sub-beam from the beam splitter, and a photodetector, wherein a reflected first sub-beam from the fixed mirror and a reflected second sub-beam from the scanning MEMS mirror recombine at the beam splitter and become directed to the photodetector. According to one embodiment, the photodetector is a MEMS-based IR detector. In addition, the MEMS-based IR detector can be an un-cooled IR detector having a capacitive sensing structure.