The Raytools BM109 D28×F100 collimating lens is identified by a nominal diameter of 28 mm and a focal length of 100 mm. It is an optical component used in a compatible laser processing head to collimate the beam emerging from the delivery fiber. Those two dimensions are useful starting points, but they do not by themselves confirm compatibility: the head version, lens shape, coating, and optical arrangement must also match. This guide explains what to check before ordering and how to approach replacement safely.
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This guide is intended for purchasing teams, maintenance technicians, and laser system integrators sourcing a replacement Raytools BM109 D28×F100 collimating lens. It is also useful when comparing supplier offers or checking whether a lens described with similar dimensions is the right part for a specific head. If you are diagnosing poor cutting or processing results, remember that a collimating lens is only one possible cause. Contamination, alignment, protective optics, fiber condition, and process settings may also require inspection by a qualified technician.
A collimating lens receives light that diverges as it exits the fiber and helps form a more controlled beam for the laser head’s optical path. The collimated beam is then handled by other optics in the system, which may include a focusing lens. A collimating lens is therefore not interchangeable with a focusing lens simply because both are round optical components. The required part depends on its position and function within the specific head assembly.
In the product designation, D28 indicates a nominal lens diameter of 28 mm, while F100 indicates a nominal focal length of 100 mm. These are identification values, not a complete engineering drawing. Edge geometry, thickness, clear aperture, material, coating, and dimensional tolerances may vary by specification or supplier. Confirm those details against the original part information when they are important to fit or optical performance.
Compatibility should be checked across both mechanical and optical requirements. A lens may match the stated diameter and focal length but still be unsuitable if its coating is intended for a different wavelength or if its shape and mounting arrangement do not fit the head. For fiber laser equipment, a wavelength near 1.06 μm is common, but that general reference is not proof that a particular lens coating is appropriate for your system. Verify the laser’s actual wavelength and the lens supplier’s coating specification before installation.
| Item to verify | What to confirm | Why it matters |
|---|---|---|
| Product designation | BM109; D28; F100 | Provides a baseline for identifying the requested part. |
| Diameter and focal length | Nominal 28 mm diameter and 100 mm focal length | Helps check fit and optical design, but does not establish full interchangeability. |
| Head version | Exact model variant and optical configuration | Different versions may use different components or arrangements. |
| Optical specification | Material, surface form, coating, wavelength range, and orientation | Helps ensure the lens is suitable for the laser and installation position. |
| Mounting details | Retaining ring, spacer, seating direction, and assembly requirements | Reduces the risk of fit problems or incorrect installation. |
Start with the equipment manual, parts list, or documentation for the exact Raytools BM109 head version. Compare the existing lens marking and physical dimensions with the replacement specification, and do not assume that a visually similar part has the same optical properties. If the original part has no readable marking, share clear photos and measurements with the equipment supplier or optical component supplier. When the application is safety-critical or the optical configuration is uncertain, ask a qualified service provider to confirm the part before installation.
Replacing a collimating lens requires care because contamination or incorrect handling can damage an optical surface. The steps below provide a general sourcing and inspection workflow, not a substitute for the service instructions supplied with your laser head. Follow the equipment manufacturer’s procedure, and use trained personnel for work inside the optical assembly. Never inspect or handle the optics while the laser can emit.
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Choose the replacement based on the complete optical system, not only the nominal focal length. Confirm the laser wavelength, power and operating conditions with the lens supplier so the recommended coating and component specification are appropriate. The actual requirements depend on the laser source and head configuration. Avoid treating general fiber-laser specifications as confirmation of suitability for a particular BM109 assembly.
When requesting quotes, ask each supplier to state the exact product designation and available technical details. Useful information includes nominal dimensions, coating wavelength range, material where specified, packaging, and whether documentation is available. If a supplier proposes an alternative, ask for a written comparison against the original requirements instead of accepting “equivalent” without supporting details. This makes technical and commercial offers easier to evaluate consistently.
Price and lead time can depend on the requested specification, order quantity, stock status, and shipping destination. Minimum order quantities may also vary by supplier and product availability, so request confirmation rather than relying on a general estimate. For an accurate quotation, provide the required quantity, delivery country, preferred shipping method, and target delivery schedule. Confirm whether the offer covers the lens only or includes any related accessories.
A reliable supplier should be able to clarify what the product designation covers and which details still need confirmation. Ask how the supplier verifies dimensions and coating information, what product documentation is available, and how it handles questions about compatibility. Also confirm packaging, order quantity requirements, quotation validity, and shipping terms. Clear answers help reduce sourcing uncertainty, although they do not replace verification against the equipment manufacturer’s requirements.
At QIRUI LASER, we support B2B buyers sourcing laser optical components, including the Raytools BM109 D28×F100 collimating lens. We can review the information you provide, help clarify the requested specification, and prepare a quotation based on quantity and destination. To make the compatibility check more effective, send the exact head version, photos or markings from the existing lens, laser wavelength, and any available parts documentation. If any critical specification is unknown, we will identify it as a point to confirm rather than assume it.
The Raytools BM109 D28×F100 collimating lens is identified by a nominal 28 mm diameter and 100 mm focal length, but those dimensions alone are not enough to guarantee a correct replacement. Confirm the exact BM109 version, optical coating and wavelength suitability, lens form, and mounting details before ordering. For safe replacement, follow the equipment manufacturer’s service procedure and use qualified personnel where required. Send QIRUI LASER your head model, lens markings or photos, wavelength, quantity, and delivery destination to request a specification review and quotation.
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