Patent ID: 6020587
Filing Date: 2000-02-01
Classification: G01N

Abstract:
A chlorophyll content meter comprising:a first optical bandpass filter for filtering light received through an optical lens, the first bandpass filter having a central wavelength of transmission of 700 nm;a second optical bandpass filter for filtering light received through an optical lens, the second bandpass filter having a central wavelength of transmission of 840 nm;detector circuitry for detecting a level of light output from each of the first and second optical bandpass filters and converting the detected levels into digital representations; anda controller for receiving the digital representations and calculating a relative chlorophyll content of a target plant, whereby the controller calculates a percent of light reflected from the target plant by comparing outputs from the first and second optical bandpass filter produced from light reflected from the target plant against outputs from the first and second optical bandpass filter produced from a light source.