When your projects demand near-perfect light control, our Calcium Fluoride Super Low Loss Flat Mirror delivers. Engineered for high-energy laser systems and ultra-precise optical setups, these mirrors combine ultra-low absorption (<2 ppm) with exceptional surface accuracy (λ/10 @ 632.8nm). Whether you’re optimizing femtosecond lasers or semiconductor lithography tools, our mirrors minimize wavefront distortion while maximizing reliability—even under extreme thermal and mechanical stress.
| Specification | Value |
|---|---|
| Dimension | Dimension D=φ3-φ25mm (tolerance ±0.1),H=3-8mm D:H > 4:1 (tolerance ±0.5) D=φ26-φ100mm (tolerance ±0.1),H=6-25mm D:H > 5:1 (tolerance ±0.5) |
| Coating Area | conventional size D12.7, coating area size 7.5; D25 coating area size 10, other coating area size can be customized |
| Surface Accuracy | λ/10 @ 632.8nm |
| Parallel Error | <10" |
| Roughness | Ra0.12nm (Zygo profilometer, 173x173µm area) |
| Coating | 420nm-3000nm, Reflection ≥99.999%, Loss 2-3ppm, Transmission 3-5ppm |
| Material | Calcium Fluoride |
Note: Custom specifications are available upon request to meet your specific needs.

1. Ultra-Low Loss, Maximum Efficiency
Our proprietary coating technology reduces optical loss to <0.01% at critical UV/IR wavelengths. This means more energy reaches your target—whether you’re powering lithography systems or calibrating hyperspectral sensors.
2. Nanoscale Surface Perfection
Achieve sub-nanometer smoothness (<0.12nm Ra) thanks to advanced polishing methods. This minimizes light scatter, ensuring crisp beam profiles and accurate measurements.
3. Built for Extreme Environments
Rigorously tested under MIL-STD-810 standards, these mirrors resist thermal shock, humidity, and mechanical vibration. Perfect for aerospace or round-the-clock fab operations.
4. Customizable to Your Needs
Need a unique size, coating stack, or curvature? Our team delivers tailored solutions in as few as 8 weeks.
From diameter-to-thickness ratios (D:H up to 5:1) to anti-reflective back coatings, we adapt to your requirements.
Popular Customizations:
Our in-house engineers provide:
Order 10+ units and enjoy:
Need a Mirror That Matches Your Precision Standards?
Request a Quote or Upload Your Specifications
Lead Time: 6–8 weeks for standard orders | Expedited options available

1. How does surface roughness impact performance?
Sub-nanometer smoothness (<0.12nm Ra) minimizes scatter, which is critical for maintaining beam integrity in high-power lasers.
2. Can these Calcium Fluoride Super Low Loss Flat Mirror handle high thermal loads?
Yes. They’re tested to withstand thermal cycling (-50°C to 150°C) without performance loss.
3. What purity grade do you use?
We source ≥99.99% pure CaF₂, with impurity levels tracked via certified material reports.
4. Do you offer protective coatings?
Optional AR coatings reduce reflection loss on the mirror’s backside, boosting overall transmission.
Contact our optical engineers: xachaona@163.com about Calcium Fluoride Super Low Loss Flat Mirror.
Learn about our latest products and discounts through SMS or email