It is reported that the German green laser pointer and the components and services manufacturers of the optoelectronic industry said recently that the micro-holes generated by the laser help maintain the freshness of packaging products. These apertures are constructed using a diffractive optical element (DOE); an optical device that converts a single laser beam into multiple small beams in a specified pattern to meet specific application requirements.
A diffractive optical element (DOE) allows a laser beam to be split, superimposed, or formed into almost any shape. The food industry is currently using diffractive optical elements (DOE) for laser perforation of fruit or vegetable packaging. In this way, the packaged food can still “breath” normally, which helps to extend its storage life. Depending on the type of food and material, the diameter of this laser microhole is between 50 and 300 microns.
With these dimensions, only lasers can achieve the required perforation consistency. Using multi-point DOEs in this application, only one optical element is needed to generate the same number of laser beams as needed. At the same time, almost all the energy of the original beam can be retained.
At the same time, modified atmosphere packaging (MAP) was used to extend the storage time of fresh food. This package contains no air and contains one or more gases, mainly nitrogen or carbon dioxide. The green laser pointer micropores enable the necessary exchange of gases while maintaining the protective atmosphere required for packaging.