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E-mail
taomsun@vip.163.com
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Phone
13862625813
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Address
Building A, Renheng PARK, 1211 Xinghu Street, Suzhou Industrial Park
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SUZHOU TAOMSUN SCIENTIFIC INSTRUMENTS CO.,LTD
Deep ultraviolet biconcave lens and crescent lens
NegotiableUpdate on 08/26
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Overview
Deep ultraviolet double concave lens crescent lens, this product is a calcium fluoride (CaF ₂) double concave lens/crescent lens, using ultraviolet grade single crystal material, with excellent transmission in the deep ultraviolet to mid infrared band (190nm~7 μ m). Surface PV ≤ 30nm, RMS ≤ 3nm, roughness Sa ≤ 0.2nm, eccentricity<15 ", smoothness better than 40/20, center thickness tolerance 0.02mm. Supports strict structural customization such as D/R<1.3. Widely used in deep ultraviolet lithography, laser systems, spectral analysis, and quantity detection equipment, it can be customized according to non-standard drawings.
Product Details
TAOMSUN Precision Optics Division
🤝 Overseas Technical Partner:METICULAB™
TAOMSUN UV-Grade CaF ₂ Biconcave & Meniscus Lenses – DUV Lithography & Laser Optics
Brand:TAOMSUN ｜Overseas Technical Support:METICULAB (Korea) ｜ISO 9001· Cleanroom Manufactured
TheTAOMSUN UV-Grade Calcium Fluoride (CaF ₂) Lensesdeliver190nm – 7μmtransmission, overcoming fused silica's severe DUV absorption limits. Manufactured from high-purity single-crystal CaF ₂, they achievePV ≤30nm (typical 14.8nm),RMS ≤3nm (typical 1.7nm), andSa ≤0.2nmvia AFM verification. Available inΦ8–Φ100mmwith full interferometer + AFM inspection reports included.
🔍 Which geometry to choose?
Biconcave– Diverges collimated beams; ideal for beam expansion, spatial filtering, and optical path compensation in DUV laser systems.
Meniscus– Minimizes spherical aberration; suited for focusing high-power lasers and precision imaging applications where beam quality is critical.
📋 Technical Specifications
| Brand / OEM | TAOMSUN(Overseas Partner: METICULAB) |
| Material | UV-Grade CaF ₂ Single Crystal |
| Transmission Range | 190nm – 7μm(DUV to Mid-IR) |
| Surface Figure (PV) | ≤30nm @632.8nm(Typ. 14.8nm) |
| Surface Figure (RMS) | ≤3nm @632.8nm(Type. 1.7nm) |
| Surface Roughness (Sa) | ≤0.2nm(AFM verified, typical 0.15–0.47nm) |
| Diameter (Custom) | Φ8 – Φ100mm ｜ Tolerance:±0.01mm |
| D/R Ratio | ＜1.3 (thin-wall meniscus supported) |
| Centration Error | ＜15 arcsec |
| Surface Quality | 40/20 Scratch/Dig (MIL-PRF-13830B) |
| Coating Options | Uncoated / DUV AR (193nm) / VIS AR / IR AR |
| Quality System | ISO 9001· Cleanroom Manufactured |
| Inspection Reports | Zygo Interferometer + AFM + Centration Test + Material Cert. |
📦 Standard Models & Custom Ordering
| Order Code | Geometry | Diameter | Coating | Lead Time |
|---|---|---|---|---|
| TS-CAF2-254U | Biconcave | Φ25.4mm | Uncoated | In stock (1 pc) |
| TS-CAF2-508U | Biconcave | Φ50.8mm | Uncoated | In stock (1 pc) |
| TS-CAF2-MEN | Meniscus | Custom (8–100mm) | AR optional | 4–6 weeks |
| TS-CAF2-CUS | OEM/ODM | Any | DUV/VIS/IR AR | Quoted per drawing |
* OEM branding, custom radii, and edge geometry available. Full inspection data included with every shipment.
⚙️ Key Advantages
✅190nm–7μmbroadband transmission
✅PV ≤30nm(Zygo verified, typ. 14.8nm)
✅Sa ≤0.2nm(AFM, super-smooth surface)
✅D/R ＜1.3supports thin-wall meniscus
✅High laser damage thresholdfor high-power systems
✅Full traceability: interferometer + AFM + material cert
✅ISO 9001cleanroom manufacturing
✅Overseas technical supportvia METICULAB (Korea)
🎯 Primary Applications
DUV Lithography Semiconductor Wafer Inspection High-Power Laser Systems Spectroscopy & Analytical Instruments Metrology & Precision Measurement R&D Laboratories
❓ Frequently Asked Questions
Q: Can you manufacture D/R ＜ 1.3 thin-wall meniscus lenses?
A: Yes. Our proprietary polishing process supports D/R ratios below 1.3, enabling thin-wall meniscus geometries for compact optical systems.
Q: What is the difference between single-crystal and polycrystalline CaF ₂?
A: Single-crystal CaF ₂ offers higher transmission uniformity, lower scattering loss, and better laser damage resistance – essential for DUV and high-power applications. All TAOMSUN lenses are single-crystal.
Q: What inspection reports are included with each shipment?
A: Every lens comes with a Zygo interferometer report (PV/RMS), AFM roughness report (Sa), centration test certificate, and material purity certificate.
Q: What is the typical lead time for custom orders?
A: Standard stock items ship within 2–3 business days. Custom geometries (including meniscus and AR-coated versions) typically require 4–6 weeks depending on complexity and coating specifications.
🏭 About TAOMSUN
TAOMSUNis a precision optical components manufacturer with deep expertise in high-end optical fabrication and thin-film coating technologies. Our core team brings decades of experience from the Japanese optical industry, operating under ISO 9001 quality management systems. We specialize in UV-grade CaF ₂, fused silica, and other crystalline optical materials for semiconductor, laser, and analytical instrumentation sectors.🌏 Overseas technical inquiries are supported by our partner METICULAB (Korea).
TAOMSUN
Precision Optical Components
📧 Sales
taomsun@vip.163.com
+86-13862625813
🌏 Overseas Technical Partner
METICULAB™
choikyc@gmail.com Icult-inventor responsible; + 82 - 10 - 3988 - 4813
WhatsApp / KakaoTalk
TAOMSUN products are manufactured under ISO 9001 certified quality management. Specifications are typical values and may vary by custom configuration. For OEM/ODM inquiries or custom drawings, please contact our sales team. Overseas customers may reach out to METICULAB for technical consultation in Korean/English.
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