Among all visible laser devices, violet light is at the edge of the visible spectrum, which is more unique than the common red, green and blue light. It can be easily distinguished from other colors in various environments. On the basis of an import semiconductor violet laser diode and qualified optic lens inside a high duration housing tube, it is created into a line measuring tool of a violet laser line generator. Even in complex light or strong background interference, the violet laser line can be clearly discernible. When it makes proper installation and proper use of output power and optic lens fan angle, it is able to make highly clear and fine violet line indication and measurement for multiple fields conveniently, and help operators make more accurate line positioning judgments. 
Unlike the use of other longer wavelength laser, this short wavelength of 405nm violet laser line generator emits quite sensitive color violet laser light to human eyes. It is neither too glaring to cause visual fatigue, nor can it be clearly perceived without attracting excessive attention. In applications where long-term observation of line markings is required, such as horizontal markings in construction, it can reduce damage to the human eye. In those of long term constant violet line alignment work, 405nm violet line laser is less effected by factors such as atmospheric scattering during propagation.  It can maintain good violet straight-line propagation, achieve high-precision positioning and measurement, and provide more accurate alignment marks in the photolithography process of electronic chip manufacturing.
Usually 405nm violet laser line generator adopts the advanced optical technology in type of a qualified glass coated lens within wide fan angles of 10 to 110 degree and high quality optical components. Only if it gets constant electric power source from an AC/DC adapter, it ensures the output violet laser line has good beam stability and high straightness. In the auxiliary positioning of cultural relics restoration, it can continuously provide accurate reference lines. On the basis of correct use of output power and optic lens fan angle, within quite long work distance of 25 meters, violet laser module is able to make ideal line aligning accuracy as expected.
Featured by unique absorption and reflection on certain materials, 445nm violet laser line generator can be used for processing or detection of specific materials. For example, in the cutting of glass product, violet laser line can be better absorbed by glass to achieve more accurate cutting. In addition, purple light emitted by violet laser module can excite some materials to produce fluorescence, and has unique advantages in cell imaging and fluorescence detection in the biomedical field. For example, in fluorescent immunoassay, violet straight lines can excite fluorescent markers to help detect biological molecules.
The whole line alignment work with a 405nm violet laser line generator only requires lower power to produce clearly visible and straight violet laser line. Compared with high power lasers, it is safer and more suitable for scenes with high safety requirement such as educational demonstrations and stage performances. The genuine violet line alignment will not produce harmful radiation, and is harmless to the human body and the environments, complies with environmental protection and safety standards, and can be widely used in various occasions.