Description
M9×P0.5 Collimating Lens for 633nm/635nm Red Lasers — Ø4.7mm Element, EFL 6.2mm
Our M9-threaded red-laser / HeNe collimator lenses with 6.2 mm effective focal length and Ø4.7 mm glass aspheric element are optimized for 630–650 nm emitters (632.8 nm HeNe and 635/650 nm LD typical).
Featuring >97% transmission BBAR coating at 633/635 nm and a precision M9×P0.5 fine-thread metal housing for focus adjustment,
these compact 8 mm-length assemblies deliver tight beam collimation for red dot/line modules, HeNe alignment tools, and OEM red LD packaging.
Custom EFL (3.77 / 4.05 / 8.0 / 13.55 mm etc.), threads (M6/M10/M12), and visible-broadband coatings available on reque
Specifications:
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Mount / Thread: M9 × P0.5 (fine pitch), full or half thread; overall length ≈ 8 mm
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Lens Element Diameter: Ø4.7 mm (Clear Aperture typically Ø3.8–Ø4.2 mm)
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Effective Focal Length (EFL): 6.2 mm (±2% tolerance)
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Design Wavelength: 630–650 nm (optimized @ 632.8 nm / 635 nm / 650 nm)
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Lens Element: Molded glass aspheric (L-BAL35 / N-BK7 / D-ZK3) or AR-coated plano-convex
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Numerical Aperture (NA): 0.25 – 0.35 (matches typical 5.6 mm TO-can red LD)
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Working Distance (WD): ≈ 4.8 – 5.4 mm (adjustable by thread depth)
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Coating: BBAR @ 630–650 nm (Ravg < 0.5% per surface; Rs < 0.3% @ 633/635 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.
Our optical collimating lenses are engineered to efficiently collimate divergent or convergent light into a highly parallel beam, ensuring excellent beam uniformity and optical accuracy.
These collimation lenses are widely used in laser systems, fiber optic communication, optical sensors, imaging equipment, and industrial optical assemblies.
Manufactured from high-quality optical materials such as BK7, fused silica, and infrared crystals, our optical collimation lenses feature precise surface accuracy, high transmittance, and low wavefront distortion.
Optional AR coatings are available for visible, near-infrared, and infrared wavelength ranges, improving transmission efficiency and reducing reflection losses.
We support custom optical collimating lenses with flexible options for focal length, diameter, coating, and mechanical integration, providing reliable solutions for both standard and customized optical systems.
Contact:Rebecca Xu
Email: rebecca@realpoo.cn
