|
|
Article: NONDESTRUCTIVE MEASUREMENT OF WOOD PROPERTIES BY USING NEAR-INFRARED LASER RADIATION.
- Article from:
- Forest Products Journal
- Article date:
- January 1, 2000
- Author:
CopyrightCOPYRIGHT 2000 Forest Products Society. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
ABSTRACT
This study deals with the construction of a practical nondestructive measurement system with a semiconductor near-infrared laser, by which some information at the deeper position of a sample could be measured more correctly than that by the traditional spectrophotometer. A series of experiments was carried out by giving attention to some geometric conditions of illumination (incident angle, etc.), physical conditions (sample thickness, direction of fiber, etc.), and moisture content (MC). It was revealed that the transmitted output power, Pt, varied characteristically with the combination of geometric conditions of illumination and physical conditions of ...