Collimator Lenses is made of several lenses or single aspheric lens, are designed to collimate light to a desired diameter beam which can make a collimated and direct effect in laser instruments. Material N-BK7, L-BAL35, D lak6, D-ZK3 Diameter Tolerance 0.1mm, 0.01mm Center Thickness Tolerance: 0.1mm, 0.01mm Focal Length Tolerance 1 Clear Aperture 90 Surface Quality S D 60 40,40 20 Wavelength general 400-700nm or cuostmer requests Coating AR Ultraviolet UV, visible, or Infrared IR spectrums Application Laser collimating lenses Fiber collimating lenses Laser diode collimating lenses Laser level meter Dot laser device Throw line instrument Fiber collimation system