Related Expressions

Luminescent Nano Pigment (LNP).

Explanation

The term LASER is an acronym: Light Amplification by Stimulated Emission of Radiation. Lasers are capable, depending on its design, of emitting most of the wavelengths starting from the ultraviolet wavelengths to the infrared wavelengths of the electromagnetic spectrum. A typical laser can emit usually only one certain wavelength; for an example a typical red laser emits light at a wavelength of 650 nm (10-9 m).
An Infra-Red (IR) laser emits a wavelength in the Near Infra-Red area (NIR) of the electromagnetic spectrum (NIR area is about 800 nm to 2500 nm). An IR laser is shown in Figure 7.

Figure 7 : IR laser-pointer

Application/Usage in Indisputable KEY

An Infra-Red laser/light source is used to excite the LNP (enable radiation of the LNP) in the ink that is used to mark codes to the end of boards. Use of LNP and Infra-Red laser/light source is one alternative solution to enhance automated coding and reading and thus tracking of boards in sawmills’ production line.

Institutions with teaching capabilities

Tallinn University of Technology is also in the Indisputable KEY consortium and is central in the development of marking and reading systems.

Available text books and training material

“ Handbook of Laser Technology and Applications ”, Colin E. Webb, Julian, D. C. Jones, 2004: This handbook covers essentially all known areas of technical applications of lasers. It should be useful both to those who want to explore the field or some related idea for the first time, and those looking for advanced and rigorous discussion along with references to scientific and technical papers on aspects of special interest.

“ Laser Marking and Machine Vision Codes for Product Security & Traceability ”, Scott R. Sabreen; Plastics Decorating Magazine, 2008
Several US Patents studied this subject (Infrared laser which excites pigments).