AbstractA North Italian company developed a PGP (Prism-Grating-Prism) spectrographic optic device, originally developed for remote sensing applications in the aerospace field, able to analyse the light spectrum independently from light polarisation. It can be used in many industrial fields for quality control. The company is looking for opportunities concerning technical cooperation/licensing/joint ventures able to exploit the technology in the textile/plastic/wood/paper-machinery manufacturing sector.
DetailsPGP (Prism-Grating-Prism) spectrographic optics, originally developed for remote sensing applications in the aerospace field, is based on the application of a highly efficient PGP spectrograph able to analyse the light spectrum - from infrared to ultraviolet - independently from light polarisation. The spectrometer, obtained by combination of the spectrograph with the matrix optical sensor, allows colour measurement along a line on a large number of points, with both high spatial and spectral resolutions.
A specific application has been developed for the textile industry, where quality control is still carried out manually by specialised personnel. An automatic system has been developed to identify colour defects in real time on orthogonal-yarn textiles both during the dyeing process and on the finished product. This will allow fast (potentially up to 100 m/min) and reliable quality control, enabling the increase of the production rate (which will at least duplicate), and limit the loss of fabrics that do not meet the quality standards.
Besides the textile sector, applications are expected in sectors such as plastics, wood and paper, representing markets of similar magnitude to the textile one.
This particular approach has the following advantages:
• Reduced measurement times.
• Simpler mechanisms with no need for scanning movements.
• Simultaneous measurements on a line or multiple points.
The technology provides good accuracy in spectral analysis measurements (typical of the spectrometer) and a high amount of performed measurements (typical of common cameras).
This technology is able to provide high-quality real-time control by constantly monitoring possible defects along the production line, thus avoiding the costly and useless processing of not-standard materials.