Imaging Systems
Protective windows, lens elements and plates for machine vision, microscopy and camera modules.
Home / Products / Infrared Optical Components / ZnSe Lenses
Home / All / Optical Components / Optical Lenses / Custom Special Optical Lenses / BK7 Optical Glass Components Factory & Custom Supplier
Looking for Custom Optical Components?
✔ OEM / ODM Customization
✔ Free Drawing DFM Technical Review
✔ 24-Hour Professional Quotation
✔ Flexible Low MOQ & Fast Prototypes
BK7 Optical Glass Components Factory & Custom Supplier
| Share | |
|---|---|
| Categories | Custom Special Optical Lenses |
| Brand | FELIX GLASS optical glass Manufacturing base |
| Model | Custom BK7 Optical Components |
| Material | N-BK7 or approved BK7 equivalent |
| Dimension | Custom per drawing; geometry reviewed |
| Tolerance | Drawing-based; precision levels by review |
| Surface Quality | 60-40, 40-20 or tighter by review |
| Surface Flatness | Typical λ/4; λ/10 by review at specified wavelength |
| Visible Transmission | High visible-range transmission; curve by design |
| Coating | Uncoated, MgF2, BBAR or custom dielectric |
| MOQ | Prototype to production; project-based |
| Lead Time | Quoted after drawing, material and coating review |
| Download |  |
Detail Information
Custom BK7 Optical Components
BK7 Optical Glass Components Built to Your Drawing
Felix Glass Co., Limited manufactures custom BK7 windows, plates, lenses, prisms and machined optical parts for imaging, illumination, measurement and precision-instrument programs. Send the drawing, wavelength range, clear aperture and inspection requirements for an engineering review.
Prototype-to-production support
Uncoated and AR-coated options
Drawing-based inspection planning
Request an Engineering Quote
Engineering Snapshot
What Buyers Can Specify
Values below are practical quotation fields, not blanket guarantees. Final capability is confirmed after Felix Glass reviews the drawing, geometry, glass grade, coating and inspection method.
| Specification Field | Available Direction | Quotation Note |
|---|---|---|
| Material | N-BK7, BK7-equivalent optical crown glass, or customer-specified maker/grade | State whether an exact glass maker and melt certificate are required. |
| Dimension | Round, square, rectangular and drawing-defined profiles | Provide OD, length, width, thickness, clear aperture, holes, slots and chamfers. |
| Tolerance | Commercial through precision dimensional tolerances | Tighter limits depend on size, thickness, edge geometry and measurement datum. |
| Surface Quality | 60-40, 40-20 and tighter scratch-dig levels by review | Specify the applicable standard and whether limits apply inside the clear aperture. |
| Surface Flatness | Typical λ/4; tighter flatness including λ/10 considered by review | State test wavelength, clear aperture, power and irregularity requirements. |
| Visible Transmission | High visible-range transmission before coating losses | Specify wavelength band, thickness and minimum system transmission target. |
| Coating | Uncoated, MgF2, broadband AR and application-specific dielectric coatings | Define AOI, polarization, wavelength band and required reflectance or transmission. |
| MOQ | Prototype quantities through scheduled production | MOQ depends on blank size, tooling, coating lot and inspection scope. |
| Lead Time | Quoted after drawing, material and coating review | Prototype and repeat-production schedules are confirmed separately. |
Material Properties
Representative N-BK7 Material Data
Use these typical values for early material selection only. Procurement specifications should reference the chosen glass maker, current datasheet, melt data when required and the operating environment.
Refractive index ndApprox. 1.5168
Abbe number VdApprox. 64.17
DensityApprox. 2.51 g/cm³
CTEApprox. 7.1 × 10−6/K, 20–300°C
Transformation temperatureApprox. 557°C
Knoop hardnessApprox. 610 HK
BK7 is commonly selected for visible and near-infrared optics where balanced optical performance, machinability and project economics matter. Fused silica or sapphire may be more suitable for harsher thermal, UV or mechanical environments.
Applications
Where Custom BK7 Components Fit
Metrology
Optical flats, beam-handling parts and reference components for measurement instruments.
Illumination
Windows, condensers and custom shapes for visible-light illumination assemblies.
Laboratory Equipment
Custom optical interfaces for analytical, educational and R&D instruments.
Precision Equipment
Viewing windows and optical elements for automation, alignment and inspection equipment.
OEM Programs
Drawing-controlled parts for repeat builds, spares and product lifecycle supply planning.
Manufacturing Process
From Optical Drawing to Packed Parts
- 01
Drawing Review
Confirm material, datums, clear aperture, surface form, scratch-dig, edge treatment, coating and inspection method.
- 02
Blank Preparation
Select material and prepare blanks with allowance for grinding, polishing and dimensional control.
- 03
Precision Processing
Apply CNC shaping, grinding, lapping, polishing, centering, edging, drilling or slotting as required.
- 04
Coating and Inspection
Coordinate coating when specified, then inspect the agreed dimensional, cosmetic and optical characteristics.
- 05
Cleaning and Packing
Clean, protect and pack optical surfaces according to part geometry and shipment risk.
Quality Inspection
Inspection Planned Around Functional Risk
A useful inspection plan connects each drawing requirement to a defined method, sampling level and record. Tell us which characteristics affect fit, image quality, beam performance or regulatory documentation.
Dimensions
Diameter, thickness, profile, chamfer, hole location and other drawing-defined features.
Cosmetic Quality
Scratch-dig and visible defect review within the specified clear aperture.
Surface Form
Flatness, power or irregularity checked using the agreed wavelength and aperture.
Wedge and Parallelism
Angular relationships controlled where beam deviation or assembly alignment matters.
Coating Performance
Spectral or witness-sample documentation aligned with the coating specification.
Records
Inspection report, material information or other agreed documents supplied when included in the quote.
Factory Capability
Custom Geometry, Surface and Documentation Options
Geometry
Round, rectangular, polygonal and drawing-defined profiles; holes, slots, steps and chamfers by feasibility review.
Optical Surfaces
Flat and powered surfaces with polishing level matched to the component function and inspection callouts.
Edge Finishing
Ground, fine-ground or polished edges; safety bevels and controlled chamfers where specified.
Coating Coordination
Visible and near-infrared AR options evaluated against wavelength, incidence angle, environment and durability needs.
Prototype Support
Engineering review for early builds, tolerance tradeoffs and a path toward repeat production.
Project Documentation
Request applicable inspection reports, material declarations, coating records and traceability requirements before quotation.
Buyer Checklist
Information That Speeds Up an RFQ
- 2D drawing and, for complex geometry, a STEP file
- Exact BK7 grade or approved equivalents
- Critical dimensions, datums and tolerance priorities
- Surface quality, flatness, wedge and clear aperture
- Wavelength range, AOI, polarization and coating target
- Operating temperature, cleaning method and environment
- Prototype quantity, annual demand and required delivery date
- Inspection records, declarations and packaging expectations
Engineering FAQ
Questions Buyers Ask Before Ordering BK7 Optics
1. What is the difference between BK7 and N-BK7?
BK7 is a general optical crown-glass designation. N-BK7 is a specific modern grade from a named glass maker. If optical constants, environmental compliance or melt traceability matter, identify the exact grade and accepted equivalents on the drawing.
2. Is BK7 suitable for visible-light instruments?
Yes. BK7-type crown glass is widely considered for visible and near-infrared optics. Final suitability depends on thickness, wavelength band, coating, thermal environment and system-level performance.
3. When should we choose fused silica instead?
Consider fused silica when the design needs stronger UV transmission, lower thermal expansion or improved thermal-shock behavior. Compare optical, thermal, mechanical and cost requirements rather than selecting by one property.
4. Can you supply AR-coated BK7 windows?
AR coating can be quoted when you provide the wavelength band, angle of incidence, polarization, reflectance or transmission target and durability requirements.
5. What flatness and surface quality can be requested?
Common requests include λ/4 flatness and 60-40 or 40-20 scratch-dig. Tighter values may be reviewed. Always state the test wavelength, clear aperture and applicable inspection standard.
6. Can wedge and parallelism be controlled?
Yes, when defined on the drawing. Include the datum surfaces, angular tolerance, clear aperture and measurement method if beam deviation or assembly alignment is critical.
7. Do you support prototype quantities?
Prototype orders can be reviewed. Feasible quantity and cost depend on blank availability, tooling, coating-lot minimums and inspection requirements.
8. What files should we send for a quotation?
Send a dimensioned PDF drawing plus STEP data for complex profiles. Include material, coating, inspection, quantity, application environment and delivery needs.
9. What inspection documents are available?
Request the required document package before quotation. Options may include dimensional results, cosmetic inspection records, material information and coating-related documentation, subject to the agreed scope.
10. How should BK7 optical parts be handled and cleaned?
Protect polished surfaces from contact and abrasive particles. Use a cleaning method compatible with the coating and assembly. Confirm solvent, wipe and packaging requirements for sensitive systems.
Related Products
Continue Material and Component Selection
Related Engineering Articles
Guidance for Optical Engineers and Procurement Teams
Engineering Review
Send Your BK7 Optical Component Drawing
Receive a project-specific response covering material, manufacturability, inspection approach, quantity, lead time and quotation inputs.
Need Custom Optical Glass Solution?
Send us your drawing, dimension & coating requirements for fast quotation within 24 hours.
Get Free RFQRelated Products
Custom Precision Optical & Glass Components Manufacturer – Felix Glass Co., Limited.
We supply Industrial Glass, Sapphire Optics, Optical Lenses/Prisms/Filters, Infrared IR Optics, Functional & Display Glass, N-BK7/H-K9L Optical Glass, supporting OEM mass production and laboratory custom prototypes. Flexible MOQ & free sample service available. Fill in the form to download full datasheets and get factory wholesale price within 24 hours.
CONTACT US NOW FOR A QUOTE
Send an inquiry now—we will respond promptly within 1–24 hours and provide our best formal quote within 1–2 days! Let’s start a mutually beneficial partnership today...
- Name
- *Title
- *Content
Learn more from our FAQ
- What is your MOQ for custom optical glass and display glass parts?
Felix Glass offers highly flexible MOQ to support client projects, including prototype testing, small batch trial orders and large-volume mass production. All products can be fully customized according to your drawings, tolerances and application standards. Send us your specs to get an accurate price quote within 24 hours.
- Can I get free glass samples for testing before bulk order?
Yes, our FELIX GLASS factory supports sample testing for a wide range of precision optical glass components and assemblies. The lead time for sample production is 3 to 7 working days. Please contact us today to arrange samples and obtain a customized solution that meets your needs.
- What is the production lead time for custom optical glass components?
What is the production lead time for custom optical glass components?
Answer: The lead time for standard samples is 3–7 business days, while mass production takes 15–25 business days, depending on product complexity and order volume. We provide reliable, rapid delivery for orders serving the industrial, medical, automotive, and aerospace sectors. Please submit your project details to receive an accurate delivery schedule.
- Are your optical glass products ISO, CE and RoHS certified?
All FELIX GLASS precision optical glass components comply with ISO quality system standards, as well as CE and RoHS requirements. We provide comprehensive test reports, material certificates, and inspection documentation for customer review. Please feel free to request full certification details and a formal quotation today.
- Do you offer one-stop custom optical glass processing services?
Yes. We provide a full range of in-house processing services, including CNC machining, precision grinding, optical polishing, vacuum coating (AR, AF, AG, IR), tempering, and screen printing. Every step—from raw material to finished product—is carried out within our own facility. Please let us know your requirements, and we will provide you with the most cost-effective solution.
CONTACT US NOW FOR A QUOTE
Send an inquiry now—we will respond promptly within 1–24 hours and provide our best formal quote within 1–2 days! Let’s start a mutually beneficial partnership today...
- Name
- *Title
- *Content
