How to select laser

Different parameters of the laser, the application of different emphasis, according to a common purpose, for the laser choose to do an introduction, hoping to facilitate customer purchase:
1,A close-range red dot laser modules, generally used within a distance of 3 meters, a pupil diameter of 3-5mm beam between the supply voltage 3-5V, or AC-powered, spot size can be within 1mm-2mm , the structure is small, can be used for optical path adjustment, close location, etc.;
2, close the word-linered laser modules, within 3 meters, a pupil diameter of the beam 3-5mm, supply voltage 3-5V, or AC-powered, according to the different lines from a slightly different thickness, 3 m focusing, line width 2mm less than one meter at focusing, line width 0.5mm or less, can be used to mark location, such as stone cutting position, timber cutting location;
3, light intensity red uniform word-line modules, the word length distribution of the direction of the line brightness uniformity of better than ordinary, the light detector to receive, then the corresponding uniformity better;
4, the word width adjustable red linear laser modules used within 5 meters, you can adjust the distance depending on the use of line width;
5, collimated laser beam expander, a pupil diameter of 10mm, 20mm, 30mm-50mm, a better uniformity of energy distribution of spots, spot round, good alignment can be used for long-distance point, location, distance of up to several hundred meters, or even 1000 meters, can also be a close parallel light generator;
6, close green dot laser modules, distance is 5 meters, the exit pupil spot 1mm, very close at a small spot, mode is good, close to the base transverse mode can be used to identify, locate, laser pointer, instructions ;
7, high-power desktop laser wavelengths are 532nm, 473nm, 457nm, 671nm, 1064nm, these types of solid-state lasers, 635nm, 650nm such as semiconductor lasers, big power, can be used for high-power experiments, laser show systems, laser landmarks, etc..
8, infrared-ray laser modules can be used to detect simulated life-CS equipment;
9, infrared lighting system, big power, can be used for long-range night-time monitoring;
10, high-power laser flashlight, portable, power high, irradiation distance, only for exploration, mountain climbing and other enthusiasts.