D34×T5 High Power Laser Protective Lens: Compatibility and Specification Checklist
A D34×T5 high power laser protective lens is identified by a nominal outside diameter of 34 mm and a thickness of 5 mm. Those dimensions are only the starting point: a lens is compatible only when its fit, optical properties, orientation, and operating conditions match the laser head and the application. Before ordering, confirm the equipment model or drawing, working wavelength, required optical performance, and any edge or coating details. This checklist helps B2B buyers organize those checks and send a supplier the information needed for a meaningful quotation.
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Key Takeaways
- Check that the holder accepts a lens with a nominal 34 mm diameter and 5 mm thickness; confirm tolerances and usable aperture against the equipment documentation.
- Match the lens to the laser wavelength and optical requirements. Dimensions alone do not establish laser compatibility.
- Confirm material, coating, surface quality, edge treatment, orientation, and operating environment rather than assuming they are standardized.
- For a quotation, provide the machine or laser-head model, drawings or sample dimensions, annual or trial quantity, and required delivery details.
Who This Guide Is For
This guide is intended for procurement teams, laser-equipment manufacturers, maintenance teams, and distributors sourcing a D34×T5 protective lens. It is useful when replacing an existing part, checking a new machine design, or comparing supplier quotations. The checklist does not replace the laser-head manufacturer’s specifications or a qualified engineering review. Where the original drawing is unavailable, treat fit and optical requirements as items to verify rather than assumptions.
What the D34×T5 Specification Tells You
Nominal dimensions and fit
In common lens notation, “D34” indicates a nominal diameter of 34 mm, while “T5” indicates a nominal thickness of 5 mm. Confirm that this interpretation matches the supplier’s drawing and your equipment documentation. The holder may also depend on dimensional tolerances, a chamfer or bevel, edge clearance, and the lens’s seating position.
Do not equate the outside diameter with the clear aperture. The clear aperture is the usable optical area, which may be smaller than the full part diameter because of the edge, mounting arrangement, or coating boundary. Ask for the drawing or a written dimensional specification if these details affect alignment or beam clearance.
Optical and material specifications
The D34×T5 designation does not identify the substrate, wavelength range, coating, surface quality, or laser-damage performance. These properties must be selected for the specific laser source and the lens’s position in the optical path. For example, a system operating at 1,064 nm requires a lens and coating specification confirmed for that wavelength; this is an example, not a claim that every D34×T5 lens supports it.
Ask the supplier to state the proposed substrate and coating configuration, including whether the part is coated on one or both sides and whether orientation matters during installation. Request relevant inspection or product documentation when required for your incoming-quality process. Avoid accepting general terms such as “high power” as a substitute for defined operating conditions and optical requirements.
Compatibility Checklist Before Ordering
1. Verify mechanical compatibility
- Compare the nominal 34 mm diameter and 5 mm thickness with the part drawing or the dimensions of an approved sample.
- Confirm the allowable diameter and thickness tolerances, seating depth, edge profile, and any retaining-ring or gasket constraints.
- Check the required clear aperture and ensure the lens will not obstruct the beam path when installed.
- Confirm whether the lens is flat or has another specified geometry; do not infer shape from the dimensions alone.
2. Match the laser and optical requirements
- Provide the laser wavelength, operating mode, and relevant beam conditions to the supplier or optical engineer.
- Clarify the required transmission or reflection behavior and whether the lens is a protective window or performs another optical function.
- Ask which coating, if any, is specified for the wavelength and intended use, and whether it has an installation orientation.
- Confirm that the proposed component is appropriate for the system’s power and operating conditions; do not rely on a product name alone.
3. Review the working environment
A protective lens may be exposed to heat, dust, fumes, spatter, or cleaning procedures depending on its location in the machine. Share these conditions with the supplier because they can affect material and coating selection, inspection needs, and replacement planning. Also confirm the approved cleaning method and handling requirements before installation to avoid introducing contamination or surface damage.
Selection Framework for Buyers
Use a staged review so that mechanical fit is not confused with optical suitability. First, match the part to the machine interface using a drawing or verified sample. Second, confirm wavelength and optical requirements with the equipment documentation or responsible engineering team. Third, review material, coating, finish, and environmental constraints before comparing commercial terms.
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| Check | Information to provide or confirm | Why it matters |
|---|---|---|
| Mechanical fit | 34 mm nominal diameter, 5 mm nominal thickness, tolerance, edge, clear aperture | Helps determine whether the part seats correctly and clears the beam path. |
| Laser compatibility | Wavelength, operating conditions, required optical behavior | Dimensions do not establish suitability for a particular laser. |
| Construction | Substrate, coating, surface and orientation requirements | Allows the proposed specification to be reviewed against the application. |
| Supply requirements | Quantity, packaging, inspection documents, delivery destination | Supports an accurate quotation and practical incoming inspection. |
Pricing, MOQ, and Lead-Time Questions
Pricing for a D34×T5 lens can vary with its confirmed material, coating, tolerances, inspection requirements, order quantity, and packaging. A dimension-only inquiry may result in a preliminary price that does not cover the final optical specification. Ask suppliers to identify any assumptions or exclusions in the quotation so you can compare like-for-like offers.
MOQ and lead time should be confirmed for the exact requested configuration rather than inferred from a similar listing. For a repeat purchase, ask whether the supplier can retain the approved drawing and specification for reorder reference. If the project has a fixed schedule, request the estimated production and shipping timeline in writing before placing an order.
Supplier Evaluation Checklist
Evaluate suppliers on how clearly they document the proposed part, not only on whether they use the D34×T5 name. A responsive supplier should be able to discuss the dimensions, identify information still needed, and explain which details require confirmation by the buyer or equipment manufacturer. For higher-volume or repeat programs, agree on revision control and how specification changes will be approved.
- Can the supplier provide a dimensioned drawing or confirm the relevant dimensions and tolerances?
- Will the quotation specify substrate, coating details, and wavelength compatibility where applicable?
- Can the supplier clarify inspection documentation, packaging, MOQ, and lead time for the exact configuration?
- Are open questions and any unverified assumptions clearly identified before purchase?
Common Compatibility Mistakes
A frequent mistake is ordering by diameter and thickness alone, without checking the laser wavelength or coating requirement. Another is treating the full 34 mm diameter as usable aperture, even though the holder or edge treatment may reduce the clear area. Buyers can also overlook orientation, tolerances, or cleaning requirements, which may create problems during installation or service.
When specifications conflict, do not choose the most convenient value without review. Compare the equipment manufacturer’s documentation, the existing part, and the supplier’s drawing, then have the responsible technical contact resolve any discrepancy. This is especially important when replacing a part that appears physically similar but has an unknown optical specification.
Next Steps for a Reliable RFQ
To request a useful quotation, send the supplier the machine or laser-head model, a drawing or verified sample dimensions, the working wavelength, optical requirements, environmental conditions, quantity, and delivery target. Mark any unknown fields as “to be confirmed” instead of guessing. Ask the supplier to return a written specification for approval before production or shipment.
QIRUI LASER can review your D34×T5 requirements and help clarify which mechanical and optical details are needed for sourcing. Share your application information and target quantity to begin a specification review and request a quotation. The final selection should be approved against your equipment documentation and operating requirements before installation.
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