If there is quite strict requirement of highly accurate line alignment in distance, it would be the most wonderful experience to make use of a Berlinlasers green laser line generator. This laser line module keeps rapid and accurate green reference line targeting from 532nm green DPSS laser system. Owing to its selectable optic lens degree of 10 degree to 110 degree, this green laser module is generating different line lengths from 0.5 meter to 6 meters, and then getting accurate and rapid line alignment on all targeting surfaces.
This green laser line generator gets good use of external electric power source from DC input power supply. It is getting support from 3V or 4.2V DC power supply, and then making sure of highly bright and accurate green reference line targeting under multiple working occasions. It is workable with correct selection of output power and optic lens degree, this green laser module just gets wonderful line alignment for laser cutting, textile garment processing, laser image processing system etc.
http://www.berlinlasers.com/532nm-separate-crystal-lens-green-laser-line-generator