25.4mm CVD ZnSe Negative IR Lens
25.4mm CVD ZnSe Plano-Concave Lens | -100mm EFL for IR Laser Systems
Shop 25.4mm CVD ZnSe plano-concave lens from iroptical. Precision IR optics with -100mm EFL for CO2 lasers. In-stock & custom options. Request your quote today.
Product Overview
Manufactured from premium CVD ZnSe material, this 25.4mm plano-concave lens delivers a -100mm effective focal length optimized for 10.6µm CO2 lasers and mid-infrared applications. Engineered for controlled beam expansion, collimation adjustment, and divergence management, it provides consistent high transmission across the 8–12µm band with low absorption. Every unit meets strict dimensional and optical tolerances, supporting stable performance in both prototype and high-volume setups. As a trusted supplier of infrared optics, IROptical maintains rigorous quality control to ensure world-class precision and long-term durability.
Technical Specifications for 25.4mm CVD ZnSe Plano-Concave Lens
| Optical Parameter | Specification |
|---|---|
| Base Material | CVD Zinc Selenide (ZnSe) |
| Lens Configuration | Plano-Concave |
| Outer Diameter | 25.4 mm |
| Center Thickness | 2.0 mm |
| Edge Thickness | 2.6 mm |
| Radius of Curvature (R1) | -140.27 mm |
| Effective Focal Length | -100 mm |
| Back Focal Length | -100.83 mm |
| Design Wavelength | 10.6 µm |
| Surface Quality | 40-20 scratch-dig |
Primary Applications
This negative focal length ZnSe lens is widely deployed across mid-infrared systems requiring precise beam divergence control. Key use cases include non-contact infrared temperature measurement in the medium temperature range, CO2 laser beam expansion in Galilean expander configurations, laser beam shaping and aberration correction, thermal imaging optical systems, FTIR spectroscopy setups, and industrial IR sensing modules. Its stable transmission properties also make it suitable for integration into thermal imaging instruments and precision laser processing equipment.
Customization & Service Support
Beyond standard stock configurations, IROptical provides full customization services to match specific project requirements. Available modifications include custom diameter and thickness adjustments, various anti-reflective coating options such as broadband BBAR and DLC coatings, tightened optical and dimensional tolerances, and custom surface quality grades. All custom orders undergo professional drawing review by our engineering team before quotation, ensuring full alignment with your performance specifications. We maintain an extensive in-stock catalog for fast delivery, with reliable lead times for custom production backed by ISO 9001:2015 certified quality management.
Expert Support for Your Optical Project
Engineering and sourcing teams often face industry-wide challenges: unpredictable lead times for custom IR optics, limited technical guidance during specification selection, and difficulty sourcing precision components that meet strict tolerances. IROptical addresses these pain points with dedicated engineering support, transparent lead time communication, and flexible production for both prototype and volume orders. Send your drawing, wavelength requirements, and tolerance notes to sales@iroptical.com for a detailed quotation and formal engineering review, or browse our catalog for more standard IR optical solutions.