Laser Pointers have been used in conference rooms for years and can be an effective tool if used properly. Recently, due to price cuts, these devices have been widely sold as new devices, and there have been some complaints from attendees about their inappropriate use. As a common tool and toy, laser pointer is liked and used for entertainment by many young people. But some young users, especially those belonging to the age of children, do not understand the harm of the laser pointer, which is easy to cause the consequences of hurting themselves and others. It becomes important to understand the laser pointer and use it correctly. The Product Safety Act states that laser designators must be properly classified according to DIN 60825-1. Therefore, as a user, you can identify the laser pointer category in the instruction manual and on the device label. Laser Pointers should not be used if they are not accompanied by instructions in their native language or labelled.
How to choose a high powered laser pointer for yourself? Laser pen, generally used for venue instructions, multimedia teaching instructions, site command, warehouse command, outdoor signal indication, astronomical enthusiasts refer to the use of stars. Teaching laser pointer: choose the power of 5-10MW red laser pointer. Suitable for white screen projector. If it is an LCD screen, use a 30-50MW green laser pointer. In Switzerland, the use of laser Pointers is regulated by the Federal Regulations on Protection against Non-ionizing Radiation and Acoustic Hazards (O-LRNIS). From June 1, 2021, only category 1 laser Pointers will still be allowed. Please note, however: Class 1 laser Pointers are only allowed for demonstration purposes in enclosed Spaces. This means you can't use laser Pointers outdoors. It is illegal to use Roman numerals (for example, category I or II) for this purpose. The designation indicates that laser equipment is not classified according to existing European standards. These beam characteristic parameters are not independent, but affect each other. For the same power laser beam, the better the quality of the beam, the smaller the focal point and the greater the power density of the focal point. Beam quality as one of the most important parameters of beam characteristics, focal size, focusing the beam energy distribution and power density has a great impact on the important parameters, such as size, is to evaluate the key parameters of laser manufacturing system, it not only marks the machining ability of laser manufacturing system, has important influence on laser materials processing.
The same laser, using a short focal length focusing lens, can get a smaller focus and a larger focus power density, but resulting in large aberration, lens processing is difficult, short focus is also easy to make focus lens pollution. With a long focal length lens, larger focal spot and longer focal depth can be obtained, and the effect of spot offset on the quality of laser processing is relatively small. It is well known that particles spontaneously go from a higher energy state to a lower energy state
The ground-state transition is called spontaneous radiation. In 1917, Einstein theoretically pointed out that in addition to spontaneous radiation, particles at a higher energy level can also jump to a lower energy level in another way.
