DIRECT READING OPTICAL LEAF AREA PLANIMETER
作者:
K. Schurer,
期刊:
Acta Botanica Neerlandica
(WILEY Available online 1971)
卷期:
Volume 20,
issue 1
页码: 132-140
ISSN:0044-5983
年代: 1971
DOI:10.1111/j.1438-8677.1971.tb00693.x
数据来源: WILEY
摘要:
SUMMARYAn optical planimeter is described in which the light beam from a small source is collimated and subsequently focused on a photocell. It is shown that the area of even a thin leaf placed in the collimated part of the beam is measured accurately without the need for a correction for transmitted light. The instrument features linear response, digital read‐out, high speed, good stability, five ranges of 50 up to 1000 cm2, and an accuracy of 1% of the rang
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