Either line measuring work is processing at close or long distance, under special night version illumination fields, it is operating easy and quick with a Berlinlasers 808nm infrared line laser module. The adoption of qualified glass coated lens within 10 to 110 degree and glass window are configured with highly durable metal housing tube. It keeps work with high photoelectric IR laser light emission and highly fine and straight IR line emission with various line lengths. Only after its proper adjustment of both laser beam focus and laser line emitting direction, it assures high level of accuracy IR line alignment for IR laser sight, optical instrument, infrared laser communication, lab experiment and high tech etc.infrared line laser module