This sharp, facture-free mark was created using
a Synrad laser, FH Series marking head, and
our WinMark Pro laser marking software.

CO₂ lasers continue to replace inkjet and sandblast equipment in many glass-marking applications including automotive side glass, residential/commercial window glass, microscope slides, cathode ray tubes, and now glass light bulbs.

The accompanying close-up photo shows our laser mark on the base of a miniature bi-pin glass bulb. This sharp, facture-free mark was created using a Synrad laser, FH Series marking head, and our WinMark Pro laser marking software. The hardware setup included the installation of an 80 mm FH lens that provides a 116-micron (0.005”) focused spot with a 0.8 mm (0.032”) depth of field.

The mark file consisted of a five-character part number using our “Simple” font, one of WinMark’s twelve built-in stroke fonts. The Text Height property was set to 1.8 mm (0.0694”), which results in an actual mark area measuring only 4.9 mm wide, by 1.3 mm high (0.1928” × 0.0514”). Marking properties for this file included a Velocity of 508 mm/second (20 inches/sec) and a Power (duty cycle percentage) corresponding to 25 watts. In addition, Spot Marking Style is set to “Yes” with a Spot Mark Duration of “4” (400 microsecond pulses). Using these parameters, we achieved crisp, permanent marks at cycle times of 0.19 seconds per bulb.