The application of 635nm red laser module has just made 635nm red laser line generator obtain the purest and the brightest red laser beam and red reference line targeting in all kinds of precise machinery processing works. Owing to its easy equipment of high quality glass coated lens, not the same as formally used plastic coated lens with great worrying about laser light decay or blur, this 635nm red laser module is always keeping high linear quality red laser line targeting. The genuine laser line alignment with this red laser device just gets no appearance of laser light decay or blur, but just bringing users no mistake and high speed red line targeting after correct choices of both output power and optic lens degree.