Diverging IR Lens -75mm FL
25.4mm Uncoated ZnSe Concave-Concave Lens -75mm FL
Precision 25.4mm uncoated ZnSe concave-concave lens with -75mm focal length. Ideal for 10.6um CO2 laser beam expansion. In stock at iroptical. Get a quote!
Product Overview
25.4mm Uncoated ZnSe Concave-Concave Lens -75mm FL
Engineered for high-power carbon dioxide laser beam expansion and infrared thermal imaging setups, this 25.4mm CVD Zinc Selenide concave-concave lens delivers exceptional transmission at 10.6 microns. With a negative focal length of -75mm and a raw uncoated finish, it provides maximum clear aperture flexibility and ultra-low absorption for demanding optical systems. Optical engineers specify this precision optical component to diverge collimated beam paths, control focal points, and reduce spherical aberrations in custom optical assemblies.
Technical Specifications
| Parameter | Specification |
|---|---|
| Substrate Material | CVD Zinc Selenide (ZnSe) |
| Diameter (Dia) | 25.4 mm (+0.0/-0.1 mm) |
| Focal Length (f) | -75.0 mm (±1%) |
| Design Wavelength | 10.6 microns |
| Back Focal Length (BFL) | -75.42 mm |
| Center Thickness (Tc) | 2.00 mm (±0.2 mm) |
| Edge Thickness (Te) | 2.80 mm |
| Radius of Curvature (R) | -210.98 mm |
| Surface Flatness | lambda/2 at 632.8 nm |
| Surface Quality | 60-40 scratch-dig |
| Clear Aperture | Greater than 80 percent |
| Centration | Less than 3 arcminutes |
| Bevel | Less than 0.2 mm x 45 degrees |
| Coating | Uncoated |
Primary Applications
This negative focal length ZnSe lens is widely integrated into industrial online infrared pyrometers, high-power CO2 laser processing heads, and portable thermal camera optical paths. Its wide infrared spectral range makes it equally suited for laboratory spectroscopy, thermal imaging optics calibration, and multi-element beam expander systems requiring tight control over optical divergence.
Customization & Manufacturing Services
iroptical maintains an extensive in-stock selection of standard optical components to support fast prototyping and rapid deployment. If your system requires anti-reflective coatings (such as broad-band AR or 10.6 micron V-coatings), custom diameters, or modified focal lengths, our engineering team provides high-level customization support with reliable lead times and guaranteed optical quality.
Technical Support & Direct Inquiries
Eliminate procurement delays and technical uncertainty in your optical assembly design. Whether you need immediate delivery from inventory or custom substrate fabrication, contact our optical specialists at sales@iroptical.com or request an online quote today for rapid technical assistance.
Technical Parameters
Detailed specifications are not available for this product yet. Please contact the team for application guidance.