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Configurable-bandwidth imaging spectrometer based on an acousto-optic tunable filter
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Image of FIG. 1.
FIG. 1.

Block diagram of the ATFS system.

Image of FIG. 2.
FIG. 2.

Conjugated-pupil telecentric arrangement for zero-order cancellation.

Image of FIG. 3.
FIG. 3.

Optical arrangement of the ATFS instrument, without the protective cover.

Image of FIG. 4.
FIG. 4.

Block diagram of the DDS board.

Image of FIG. 5.
FIG. 5.

Flow chart of the RFGD.

Image of FIG. 6.
FIG. 6.

Snapshot of the ATFS GUI, showing the control box and the image window.

Image of FIG. 7.
FIG. 7.

Measured DE and Bandwidth of the ATFS instrument.

Image of FIG. 8.
FIG. 8.

Spectral output of the system for different bandwidth configurations.

Image of FIG. 9.
FIG. 9.

Reflectance image of a sugar beet (Beta vulgaris L.) leaf: (upper left), (upper right), (lower left), and RGB bands (lower right).

Image of FIG. 10.
FIG. 10.

Reflectance of the central part of the leaf, measured with a point spectrometer and with the ATFS instrument (integral of the central area).

Image of FIG. 11.
FIG. 11.

Chlorophyll content estimate for a sunflower (Helianthus annuus) leaf treated with herbicide, using the NDVI index.


Generic image for table
Table I.

Measured bandwidth (FWHM) of the instrument for different bandwidth configurations.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Configurable-bandwidth imaging spectrometer based on an acousto-optic tunable filter