Description
M9×P0.5 Collimating Lens for 445nm/450nm Blue Laser Diodes — EFL 4.05mm, Ø6.3mm Element
Our M9-threaded blue-laser collimator lenses with 4.05 mm effective focal length and Ø6.3 mm glass aspheric element are optimized for 440–460 nm blue laser diodes.
Featuring >97% transmission BBAR coating at 445 nm and a precision M9×0.5 fine-thread metal housing for focus adjustment, these compact assemblies deliver tight beam collimation for 445/450 nm dot/line modules, entertainment lasers, and OEM blue LD packaging.
Custom EFL (3.77 / 6.2 / 8.0 mm etc.), threads (M6/M10/M12), and coatings for violet (405 nm) or visible broadband available on request.
For Collimating lens, the focal length we have 3.77mm,4.02mm, 4.39mm,6mm,6.2mm ,6.5mm,8mm, 8.3mm, 9.8mm, 10mm,11.2mm and 12mm.
Specifications:
Mount / Thread: M9 × P0.5 (fine pitch), full or half thread; overall length ≈ 6.5 mm
Lens Element Diameter: Ø6.3 mm (clear aperture typically Ø5.0–Ø5.5 mm)
Effective Focal Length (EFL): 4.05 mm (±2% tolerance)
Design Wavelength: 440–460 nm (optimized @ 445 nm / 450 nm)
Lens Element: Molded glass aspheric or AR-coated N-BK7 / D-ZK3 plano-convex
Numerical Aperture (NA): 0.30 – 0.40 (matches typical 5.6 mm / 9 mm TO-can blue LD)
Working Distance (WD): ≈ 2.8 – 3.2 mm (adjustable by thread depth)
Coating: BBAR @ 440–460 nm (Ravg < 0.5% per surface; Rs < 0.3% @ 445/450 nm), MgF₂ optional
Housing Material: Nickel-plated brass or black-anodized aluminum
Transmission: ≥ 97% @ design wavelength
Surface Quality: 60-40 / 40-20 Scratch-Dig
Recommended LD: 5.6 mm / 9 mm TO-can blue LD (445/450/455 nm), typical multimode emitter
