Laser marking is a common technique used for medical part marking by manufacturers. The medical part marking is often essential to the function of the finished product. Medical parts are marked for a number of reasons, but the most common are identification, traceability, and functionality. Sometimes medical parts are also marked decoratively or for branding reasons, but most often the laser marking is essential to the use of the product.
Any steered beam fiber laser marking system requires a means of directing the light from the fiber laser into the steering mirrors of the scanhead. The output device of a fiber laser is called an “isolator” or “collimator”. When the fiber laser beam exits the “isolator” it is about 8.5mm in diameter. The fiber laser beam must ultimately go into the scan head, reflect off of the X and Y galvo mirrors, pass through the F theta flat field lens and then be focused on the work piece to be marked or engraved.