Description
M9×P0.5 Collimating Lens for 635nm/650nm Red Laser Diodes — Ø7mm Element, EFL 8.0mm
Our M9-threaded red-laser collimator lenses with 8.0 mm effective focal length and Ø7 mm glass aspheric element are optimized for 630–680 nm red laser diodes (635/650 nm typical).
Featuring >97% transmission BBAR coating at 635/650 nm and a precision M9×0.5 fine-thread metal housing for focus adjustment,
these compact assemblies deliver tight beam collimation for red dot/line modules, industrial alignment tools, and OEM red LD packaging.
Custom EFL (3.77 / 4.05 / 6.2 / 13.55 mm etc.), threads (M6/M10/M12/M14), and coatings for green (520 nm) or visible broadband available on request.
Specifications:
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Mount / Thread: M9 × P0.5 (fine pitch), full or half thread; barrel length typically 10 mm
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Lens Element Diameter: Ø7 mm (Clear Aperture typically Ø5.5–Ø6.0 mm)
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Effective Focal Length (EFL): 8.0 mm (±2% tolerance)
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Design Wavelength: 630–680 nm (optimized @ 635 nm or 650 nm)
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Lens Element: Molded glass aspheric (N-BK7 / D-ZK3 / L-BAL35) or AR-coated plano-convex
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Numerical Aperture (NA): 0.22 – 0.32 (matches typical 5.6 mm / 9 mm TO-can red LD)
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Working Distance (WD): ≈ 6.2 – 7.0 mm (adjustable by thread depth)
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Coating: BBAR @ 630–680 nm (Ravg < 0.5% per surface; Rs < 0.3% @ 635/650 nm), MgF₂ optional
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Housing Material: Nickel-plated brass or black-anodized aluminum
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Transmission: ≥ 97% @ design wavelength
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Surface Quality: 60-40 / 40-20 Scratch-Dig
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.
Check the stock lenses in the following files.
Contact:Rebecca Xu
Email: rebecca@realpoo.cn
