Many traditional demonstration green laser pointer are Class III lasers (Class III lasers are a more powerful laser with power up to 5 Mw.) Low Tech Solutions uses Class II lasers (up to 1 Mw power). Lower power Class II lasers are much safer than Class III lasers. (More information about laser and eye safety.) The battery of our laser is installed in an external battery box (so the user will not bear the weight of the internal battery on the glasses.)
AA batteries are easier to find, cheaper and more efficient than special small batteries in off-the-shelf laser pointers. There is no need to remove the laser from the user's glasses when replacing the battery. This is derived from another "ible" currently under construction. I bought a green laser pointer and took apart the "easy bits", in this model it is just the focusing lens of the collimator. (The collimator is a pair of lenses that can align the laser light from the diode into a parallel beam.) Then I encountered the problem of focusing the "point" again and came up with this method.
For this, you need a fairly advanced camera with a zoom function and a "manual" mode.
It is also a dark place, with a few tripods (or other ways to fix the camera and laser) and a piece of matte black paper. If you can't manually set the aperture and speed on the camera, please don't try this operation because it won't work. The high powered laser pointer is a low-cost portable laser that can be hand-held. It is designed to point out the area of the slide or picture being presented during the presentation, instead of holding a wooden stick or retractable metal pointer. It is superior to the old-style pointer because it can be used in dark areas hundreds of feet away, and because it can produce bright spots precisely where the user needs it. It has also become popular as a multi-purpose pointing tool and has become so common that laws have been passed to restrict its use