Laser pointer filter problem

Filtering issues with laser pointers such as DPSS red (671 nm), yellow (589 nm), and blue (473 nm) lasers. These DPSS laser wavelengths are more exotic, more expensive, and are usually produced with higher quality components (including filters) unless you encapsulate the pocket spring pack in a laser pointer style. Most red (635 nm, 660 nm), violet (405 nm) and deep blue (445 nm) lasers are usually constructed using special laser diodes at the output frequency, DPSS high power laser pointer are less commonly used, our mini laser pointers are suitable for children and pets. These laser pointers are harmless to the eyes and safe to use. We do not recommend shining into the eyes. Pets love to play with lights, and so do owners because it's totally effortless.