Abstract

This paper presents a method for measuring spectral volumes (x, y, λ) using a scanning approach utilising inexpensive components and assesses the performance of an instrument based on the technique described. The system uses a diffraction grating for spectral dispersion, a slit scanning system for spatial resolution and a CCD detector to allow images of samples to be examined in different wavebands. The system described has a spectral range of 650 nm to 1100 nm at a resolution of better than 5 nm. The image size is 150 × 242 pixels and an interchangeable imaging lens enables investigation of samples at different scales. With a 58 mm camera lens objects up to 50 mm × 50 mm may be imaged at a spatial resolution of up to 2 line-pairs per millimetre (0.5 millimetre). Spectral reflection images of kiwifruit are shown as an example application of the instrument.

© 1999 NIR Publications

A Simple Digital Near Infrared Spectrometer

A. W. Harrison, C. Hansen, and D. W. Will
Appl. Opt. 9(7) 1610-1614 (1970)

Theoretical analysis of compact ultrahigh-spectral-resolution infrared imaging spectrometer

Qinghua Yang
Opt. Express 28(11) 16616-16632 (2020)

A Four-Pass High Resolution Spectrometer for the Near Infrared

Robert H. Hunt, Charles W. Robertson, and Earle K. Plyler
Appl. Opt. 6(8) 1295-1297 (1967)

Versatile photoacoustic spectrometer based on a mid-infrared pulsed optical parametric oscillator

Laurent Lamard, David Balslev-Harder, Andre Peremans, Jan C. Petersen, and Mikael Lassen
Appl. Opt. 58(2) 250-256 (2019)

Midwave-infrared snapshot imaging spectrometer

Curtis E. Volin, John P. Garcia, Eustace L. Dereniak, Michael R. Descour, Tom Hamilton, and Robert McMillan
Appl. Opt. 40(25) 4501-4506 (2001)