Optical and Electrical Properties for Determining the Optimal Harvest Time of Green Beans and Green Peas Pods Using Visible Laser

The main objectives of this research was to use visible laser for determine the optimal harvest time of green beans (Phaseolus vulgaris L. var Paulista) and Sweet pea's (Pisum Sativum L. var Sugar Lays) with its optical and electrical properties at different ages. The obtained results are summarized as follow: 1) The values of light reflection intensity were increased by using He-Ne laser (wavelength 632.8 nm) from 15 to 59 Lux for ages of green bean pods from 10 to 31 days, respectively, meanwhile these values were decreased by using He-Ne laser (wavelength 543.5 nm) from 46 to 10 Lux; 2) The values of light reflection intensity were increased by using He-Ne laser (wavelength 632.8 nm) from 10 to 39 Lux for ages of green peas pods from 6 to 33 days, respectively, meanwhile these values were decreased by using He-Ne laser (wavelength 543.5 nm) from 35 to 9 Lux; 3) The values of electrical signals were increased by using He-Ne laser (wavelength 632.8 nm) and decreased by using He-Ne laser (wavelength 543.5 nm) for ages of green pean and pea pods.; and 4) There were relationships between intensity of light and electrical reflections by using two He-Ne laser as a function of the green beans and pea pod's age. And the He-Ne laser with wavelength 632.8 nm is suitable laser results high reflection from green bean and sweet pea pods at ages 22 and 18 days, respectively (optimal harvest time) from the appearance of the flowers pods.