The collimating optical system in the Laser pointer is composed of a single lens that focuses the cone of light leaving the laser diode into a narrower beam, thereby producing a narrower spot over a longer distance. Plastic lenses are injection-molded, during which molten plastic is pressed into the mold. The plastic cools and solidifies, then the mold is pulled apart and the lens is removed. Grind and polish it to a smooth surface so that the light emitted by the laser diode does not bounce back due to imperfections on the surface.
The laser diode and collimating optics are put together with the plastic bracket to form a laser diode assembly. Most laser diode assemblies are equipped with metal springs on the back. The spring is in contact with the battery in the laser diode and is part of the circuit that draws power from the battery.
Generally, laser engraver can be used for tasks that may cause temporary distractions, such as temporary flash blindness, after-images or glare. For example, there have recently been reports that pilots were exposed to laser light at airports in areas where there are no known outdoor laser shows (see Appendix C). There have been reports in the United States and the United Kingdom of suspected use of this laser pointer to expose pilots. There are similar concerns for people who drive cars and buses. Britain has reported exposure of bus drivers and fire truck drivers
When the light beam hits a highly reflective surface, it also produces glare. This distraction can lead to other more serious primary or secondary effects. An example might be a lathe operator who "flashes" while working attentively but not at the same time. This may temporarily distract or frighten people, and cause fingers or the entire hand to contact the lathe chuck, and may cause serious physical injury.
The housing is a tube with a laser diode assembly and battery space. The laser diode assembly is pushed or screwed into one end of the housing. The inside of the case is made of brass, or there is a brass strip (glued or riveted into place) extending along the battery space. The end of the battery space also has a bare brass area or is made of brass. When this end piece is pushed or screwed into the housing, it contacts the other side of the battery to complete the circuit, allowing current to flow from the battery to the laser diode assembly.
There is also a switch button (a piece of plastic glued in a hole on the side of the case) on the case, which must be pressed and held to make the blue laser pointer pointer work. After pressing this button, the switch on the circuit board is closed, current flows from the battery to the laser pointer assembly, and the laser pointer generates a beam of light.