Special features of Laser Modules Type 13LR/13LRM
Chain of equidistant dots
The laser diode beam sources of type13LR/13LRM have a fan angle, a constant line width and an approx. uniform intensity distribution along the laser line.
However, the fine-structure is a chain of equidistant dots.
The chain of equidistant dots has a spacing of approx. the line width for a lasers of type 13LR and approx. half the line width for lasers of type 13LRM. The line width is constant along the laser line. Across the laser line the intensity distribution is Gaussian.
Due to this special intensity profile the lasers of type 13LR and 13LRM are not suitable for stray light photometry.