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A PHOTOELECTRIC DIGITAL SCANNER FOR MEASURING LEAF AREA
Author(s) -
COX E. F.
Publication year - 1972
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1972.tb01961.x
Subject(s) - photoelectric effect , scanner , photoresistor , optics , physics
S ummary A scanning photoelectric method has been devised which is capable of measuring up to 680 cm 2 of leaf tissue in 10 seconds. Its principle of operation is based on the number of dark pulses generated by a screw‐driven bank of photocells which is electronically scanned as it moves beneath an illuminated Perspex platform on which the leaves to be measured are arranged.