LASER CLASSIFICATION OF OLIVE FRUITS DURING MATURITY ACCORDING TO OPTICAL PROPERTIES

Hassan, H. E.; Abd El-Rahman, A. A.; Attia, M. M.

doi:10.21608/mjae.2011.105014

LASER CLASSIFICATION OF OLIVE FRUITS DURING MATURITY ACCORDING TO OPTICAL PROPERTIES

Document Type : Original Article

Authors

¹ Assoc. Prof., Nat. Inst. of Laser Enhanced Sc. (NILES), Cairo Univ., Egypt.

² Senior Researcher, Agr. Eng. Res. Inst., Agr. Res. Center, El-Dokki, Cairo, Egypt.

³ Postgraduate, Nat. Inst. of Laser Enhanced Sc. (NILES), Cairo Univ., Egypt.

10.21608/mjae.2011.105014

Abstract

The aim of this study was measuring and determination of the optical properties of olive maturity stages (Arbquina variety) using visible laser with 543.5 nm with power 4 mW. The obtained results were as follows: a) The intensity reflection percentages 1.36, 1.0 and 0.51% or absorption percentages 98.64, 99 and 99.49% not accepted for stages 1,2 and 3 respectively. Also, reflection percentage of 0.42% or absorption percentage of 99.58% for stage 5 was refused, b) The intensity reflection percentage 0.47% or the absorption percentage 99.53% was indicator to the best maturity index (2.65) of olive variety. This is considering optical properties instead of ideal maturity index to determine harvesting time., d) Stage 1 was high reflection intensity percentage or low absorption intensity percentage followed with high moisture content and low oil content percentages. Meanwhile, stage 5 with low reflection intensity percentage or high absorption intensity percentage was of low moisture content and high oil content percentages. So, the stage 4 was considered suitable for oil extracting, because of low moisture content 40.41 % and high oil content 19.22 %. It was standard to identify olive maturity stages to get high oil percentage according to optical properties.

Keywords

Main Subjects

Processing Engineering of Agricultural Products

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