In any type of highly clear and fine line alignment at various work distances, it makes good job with a direct diode emission device, such as Berlinlasers 650nm red line laser module. It projects moderate brightness red laser light directly from a 650nm red laser diode within 5mW to 100mW.
Being made with separate crystal lens within 10 to 93 degree, after up to 24 hours aging preventing test, this 650nm red line laser module is working well with highly uniform and fine red line within 0.5 meter to 6 meters. It also gets as fine as 0.3mm at 10cm, and 1mm to 2mm fineness at 2 meters. Only if it makes freely adjusted line fineness and line emitting direction, it makes high precision measurement for sand milling, laser cutting, textile garment processing and high tech etc.