The PARISS® Hyperspectral Imaging System
Hyperspectral Imaging Methods Compared
1
There are two Hyperspectral Imaging (HSI) systems methods: Electronic filters and wavelength dispersive:
o
Electronic filters Include: Liquid Crystal Tunable Filters (LCTF), and Acousto Optic Tunable Filters (AOTF)
o
Wavelength Dispersive Systems (WDS): Based either on a prism or a diffraction grating
WDS Grating
WDS Prism
Filter
Spectral Bandpass:
High
~constant
High
(changes)
Low (changes)
Efficiency:
Varies (medium to low)
High
(constant)
Low (changes)
High Order pollution:
Significant
None
Significant (limits wavelength range)
Wavelength acquisition:
Simultaneous
Simultaneous
Sequential
Field of View:
Sequential
Sequential
Simultaneous
Analytical:
Yes
Yes
No: relative
To see how How
filter HSI systems
work, play the
animation
1: Approaches to Spectral Imaging Hardware, Lerner, JM, Gat, N, Wachman, E., Current Protocols in Cytometry 12.20.1-12.20.40, July 2010
To see how How
WDS HSI systems
work, play this
animation
Copyright © LightForm Inc, 2011
There are two Hyperspectral Imaging (HSI) systems methods: Electronic filters and wavelength dispersive:
o
Electronic filters Include: Liquid Crystal Tunable Filters (LCTF), and Acousto Optic Tunable Filters (AOTF)
o
Wavelength Dispersive Systems (WDS): Based either on a prism or a diffraction grating
WDS Grating
WDS Prism
Filter
Spectral Bandpass:
High
~constant
High
(changes)
Low (changes)
Efficiency:
Varies (medium to low)
High
(constant)
Low (changes)
High Order pollution:
Significant
None
Significant (limits wavelength range)
Wavelength acquisition:
Simultaneous
Simultaneous
Sequential
Field of View:
Sequential
Sequential
Simultaneous
Analytical:
Yes
Yes
No: relative
To see how How
filter HSI systems
work, play the
animation
1: Approaches to Spectral Imaging Hardware, Lerner, JM, Gat, N, Wachman, E., Current Protocols in Cytometry 12.20.1-12.20.40, July 2010
To see how How
WDS HSI systems
work, play this
animation
Copyright © LightForm Inc, 2011