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.

🔍 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.

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.

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).