The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 1981
Filed:
Apr. 23, 1979
William W Biggs, Lincoln, NE (US);
Li-cor, Inc., Lincoln, NE (US);
Abstract
To measure the density of a foilage canopy, an elongated average-light measuring instrument includes an elongated diffuser, an elongated quartz rod with a uniform diffusing groove in it between it and the diffuser and a photodiode at one end so that radiation hitting the diffuser enters the quartz rod and is transmitted to the photodiode to provide a measure of average light entering the length of the instrument. To digitize light instead of sensing average light, another embodiment includes a plurality of separate light entrances positioned along the length of the quartz rod and a scanner that scans across the rod or a uniform diffusing groove and circuitry that digitizes the electrical signal from the photodiode periodically in accordance with the position of the light scanner on the groove.