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Title: High Speed 2D Hadamard Transform Spectral Imager

Abstract

Hadamard Transform Spectrometer (HTS) approaches share the multiplexing advantages found in Fourier transform spectrometers. Interest in Hadamard systems has been limited due to data storage/computational limitations and the inability to perform accurate high order masking in a reasonable amount of time. Advances in digital micro-mirror array (DMA) technology have opened the door to implementing an HTS for a variety of applications including fluorescent microscope imaging and Raman imaging. A Hadamard transform spectral imager (HTSI) for remote sensing offers a variety of unique capabilities in one package such as variable spectral and temporal resolution, no moving parts (other than the micro-mirrors) and vibration tolerance. Two approaches to for 2D HTS systems have been investigated in this LDRD. The first approach involves dispersing the incident light, encoding the dispersed light then recombining the light. This method is referred to as spectral encoding. The other method encodes the incident light then disperses the encoded light. The second technique is called spatial encoding. After creating optical designs for both methods the spatial encoding method was selected as the method that would be implemented because the optical design was less costly to implement.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
808596
Report Number(s):
SAND2002-3846
TRN: US200308%%28
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Feb 2003
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DESIGN; REMOTE SENSING; SPATIAL RESOLUTION; SPECTROMETERS; PERFORMANCE; SIGNAL CONDITIONING

Citation Formats

WEHLBURG, JOSEPH C, WEHLBURG, CHRISTINE M, SMITH, JODY L, SPAHN, OLGA B, SMITH, MARK W, and BONEY, CRAIG M. High Speed 2D Hadamard Transform Spectral Imager. United States: N. p., 2003. Web. doi:10.2172/808596.
WEHLBURG, JOSEPH C, WEHLBURG, CHRISTINE M, SMITH, JODY L, SPAHN, OLGA B, SMITH, MARK W, & BONEY, CRAIG M. High Speed 2D Hadamard Transform Spectral Imager. United States. https://doi.org/10.2172/808596
WEHLBURG, JOSEPH C, WEHLBURG, CHRISTINE M, SMITH, JODY L, SPAHN, OLGA B, SMITH, MARK W, and BONEY, CRAIG M. 2003. "High Speed 2D Hadamard Transform Spectral Imager". United States. https://doi.org/10.2172/808596. https://www.osti.gov/servlets/purl/808596.
@article{osti_808596,
title = {High Speed 2D Hadamard Transform Spectral Imager},
author = {WEHLBURG, JOSEPH C and WEHLBURG, CHRISTINE M and SMITH, JODY L and SPAHN, OLGA B and SMITH, MARK W and BONEY, CRAIG M},
abstractNote = {Hadamard Transform Spectrometer (HTS) approaches share the multiplexing advantages found in Fourier transform spectrometers. Interest in Hadamard systems has been limited due to data storage/computational limitations and the inability to perform accurate high order masking in a reasonable amount of time. Advances in digital micro-mirror array (DMA) technology have opened the door to implementing an HTS for a variety of applications including fluorescent microscope imaging and Raman imaging. A Hadamard transform spectral imager (HTSI) for remote sensing offers a variety of unique capabilities in one package such as variable spectral and temporal resolution, no moving parts (other than the micro-mirrors) and vibration tolerance. Two approaches to for 2D HTS systems have been investigated in this LDRD. The first approach involves dispersing the incident light, encoding the dispersed light then recombining the light. This method is referred to as spectral encoding. The other method encodes the incident light then disperses the encoded light. The second technique is called spatial encoding. After creating optical designs for both methods the spatial encoding method was selected as the method that would be implemented because the optical design was less costly to implement.},
doi = {10.2172/808596},
url = {https://www.osti.gov/biblio/808596}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Feb 01 00:00:00 EST 2003},
month = {Sat Feb 01 00:00:00 EST 2003}
}