LiDAR Optical Window: 905nm & 1064nm High‑Transmission Glass for LiDAR
Improper LiDAR window material selection causes low infrared transmittance, signal attenuation, outdoor scratch failure, and early weathering aging. For automotive ADAS, autonomous robots, and industrial LiDAR sensors, optical window substrate and coating directly determine detection accuracy and service life. This page provides engineer‑level performance parameters, material comparison, and clear selection guidelines for LiDAR optical windows.
1. LiDAR Window Core Material Overview
Fused Silica LiDAR Window features ultra-high IR transmittance at 905nm and 1064nm, extremely low thermal expansion, and high laser damage resistance. It is the best choice for high-sensitivity LiDAR detection and continuous industrial operation.
Sapphire LiDAR Window offers Mohs 9 extreme hardness, outstanding scratch resistance, and superior outdoor weatherability. It is widely used for vehicle-grade long-term outdoor LiDAR working environments.
2. Full Performance Comparison Table
| Parameter | Fused Silica | Sapphire | Engineering Recommendation |
|---|---|---|---|
| 905nm IR Transmittance | >92% | >85% | Fused silica for higher LiDAR sensitivity |
| Mohs Hardness | 5.5–6 | 9 | Sapphire for anti-scratch outdoor use |
| Thermal Stability | Excellent | Good | Fused silica for temperature-variable environments |
| Weather Resistance | Good | Superior | Sapphire for 5+ year outdoor service |
| Cost & Mass Production | Cost-effective | High cost | Fused silica for batch projects |
3. Material Selection Guide (Quick Decision Table)
| Project Requirement | Best Material |
|---|---|
| High-precision LiDAR detection (max signal) | Fused Silica |
| Cost-sensitive mass production LiDAR | Fused Silica |
| Vehicle-grade outdoor long-term operation | Sapphire |
| Dust, sand, scratch-prone environment | Sapphire |
4. Technical Specifications
| Specification | Standard Range | Custom Available |
|---|---|---|
| Diameter / Dimension | 5mm – 150mm | Yes, per drawing |
| Thickness | 0.5mm – 10mm | Yes |
| Surface Quality | 60/40 to 10/5 | Laser grade available |
| Flatness | λ/4 to λ/10 @ 633nm | Yes |
| Parallelism | <30 arcsec to <5 arcsec | Yes |
| Working Wavelength | 905nm / 1064nm / dual-band | Custom band coating |
5. Application Scenarios
- Automotive ADAS LiDAR sensor windows
- Industrial robot navigation LiDAR
- Smart device and AGV laser detection windows
- Outdoor high-stability laser ranging systems
6. Coating Solution
| Coating Type | Wavelength | Typical Reflectance | Application |
|---|---|---|---|
| Single-band AR | 905nm | <0.5% per surface | Standard LiDAR ranging |
| Single-band AR | 1064nm | <0.5% per surface | 1064nm LiDAR systems |
| Dual-band AR | 905nm & 1064nm | <1% per surface | Multi-wavelength LiDAR |
| Hydrophobic / AF coating | Broadband | — | Outdoor anti-fingerprint, anti-dust |
7. FAQ
Q: Which material is best for 905nm LiDAR?
A: Fused silica provides higher infrared transmittance for more stable detection; sapphire is selected for vehicle outdoor durability and scratch resistance.
Q: Does LiDAR window need AR coating?
A: Yes. Professional AR coating reduces surface reflection from ~4% to below 0.5% per surface, greatly improving ranging accuracy and signal-to-noise ratio.
Q: What is the typical lead time for custom LiDAR windows?
A: Standard sizes: 7–10 business days. Custom dimensions with special coating: 15–25 business days, depending on quantity and specification.
Q: Can you provide samples before mass production?
A: Yes. We offer prototype samples for material and coating verification before batch orders. Sample cost is refundable upon bulk order confirmation.
8. Custom Manufacturing & Request a Quote
Hong Kong Felix Optical Glass Co., Limited provides custom LiDAR optical windows with customized size, thickness, flatness, parallelism, and professional LiDAR band anti-reflection coatings for autonomous and industrial laser systems.
Available custom capabilities:
- Custom dimension: diameter, thickness, round / square / special-shape windows
- Surface quality: industrial grade to laser-grade surface finish
- Optical coatings: 905nm / 1064nm single or dual-band AR coatings, hydrophobic AF coating
- Strict dimensional tolerance, parallelism, flatness per customer drawing requirements
Email: james@felixglass.com | Tel: +86 185 6503 2888
- What is the minimum order quantity for custom precision optical glass components?
FELIX OPTICAL GLASS offers highly flexible MOQs to support customer projects, including prototype testing, small-batch trial orders, and high-volume production. All products can be fully customized to your drawings, tolerances, and application standards. Please send us your specifications, and we will reply within 1-5 hours and provide an accurate quotation after careful evaluation within 1-2 days.
- 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?
A: The production cycle for standard samples is 3-10 working days, while mass production requires 15-35 working days, depending on the complexity of the product and the order quantity. We provide reliable precision optical glass components and fast delivery services for orders from industries such as defense, industrial equipment, medical devices, shipbuilding, robotics, automotive, and aerospace. Please submit your project details so we can provide you with an accurate delivery schedule.
- Are your optical glass products ISO, CE and RoHS certified?
All precision optical glass components from FELIX OPTICAL GLASS comply with ISO quality system standards as well as CE and RoHS requirements. We provide comprehensive test reports, spectral graphs, material certificates, and inspection documents for customer review. Please feel free to request complete certification details and a formal quotation at any time.
- Do you offer one-stop custom optical glass processing services?
Yes. We offer a full range of precision optical glass component processing services, including CNC machining, precision grinding, optical polishing, chemical/physical tempering, vacuum coating (AR anti-reflective coating, AF anti-fingerprint coating, AG anti-glare coating, IR infrared coating), and screen printing. From raw materials to finished products, every step is completed in our own factory. Please tell us your needs, and we will provide you with the most cost-effective solution.
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