Abstract

Kiwifruit firmness was estimated by scattering 864 nm laser light through the fruit to exiting angles at 20 to 55° around the circumference of the fruit from the incident beam. The intensity of scattered light emitted from the fruit increased with decreasing firmness, especially at larger angles. The intensity changes were modelled using an inverse power law relationship between the intensity and a distance factor D = sin(θ / 2), where θ is the exiting angle. With increasing firmness the proportionality constant S increases and the power coefficient of D, –n, decreases. The logarithm of S gave the best linear regression results against stiffness and rupture force; two standard measures of fruit firmness, with R² values of 83% and 79%, respectively.

© 1997 NIR Publications

Near-infrared light scattering by particles in coastal waters

David Doxaran, Marcel Babin, and Edouard Leymarie
Opt. Express 15(20) 12834-12849 (2007)

Infrared aerosol extinction from visible and near-infrared light scattering

H. Gerber
Appl. Opt. 24(23) 4155-4166 (1985)

Nature of light scattering in dental enamel and dentin at visible and near-infrared wavelengths

Daniel Fried, Richard E. Glena, John D. B. Featherstone, and Wolf Seka
Appl. Opt. 34(7) 1278-1285 (1995)

Near Infrared Scattering by Sunlit Terrestrial Clouds

Henry H. Blau, Ronald P. Espinola, and Edward C. Reifenstein
Appl. Opt. 5(4) 555-564 (1966)

Polymer dispersed liquid crystals with electrically controlled light scattering in the visible and near-infrared ranges

E. P. Pozhidaev, A. V. Kaznacheev, S. I. Torgova, V. V. Kesaev, and V. A. Barbashov
Opt. Mater. Express 10(12) 3030-3040 (2020)