Beam expander laser module This beam expander laser module series is specially designed for use with red laser. The different expansion ratio can provide a small beam diameter at 10m, 100m even at 1000m. The lens design has considered the correction of spherical aberration in order to get good beam quality at long distance.Other expansion ratio is optional based on your request. Characteriscics: High-quality laser diode,optical glass lens, driver circuit and housing High Transmission Short System Length Small Spherical Aberration High reliability, high stability, long life,low price Applications: Laser Alignment Laser Leveling Aiming and Positioning Laser Surveying Specifications: Wavelength: 635nm Output power: 5mW Expansion: 5X, 10X, 20X Max input beam diameter: 2mm Min beam divergence: 0.05mrad ~ 0.6mrad Laser class: Ⅲb Operating Voltage: DC3V-5V Operating Temperature: 10℃～40℃ Storage Temperature: -30℃～80℃ Dimensions: Φ30mm ×160mm, Φ30mm ×120mm, Φ18mm ×60mm MTTF: 8000 hours