Precision CVD ZnSe Axicons (Conical Lenses)
Bessel Beam Generation | Precise Apex Control | CO2 Laser Beam Shaping
- Transforms standard Gaussian laser beams into Bessel-like beams or ring-shaped profiles for beam-shaping applications
- Advanced CNC polishing supports precise apex transitions with minimal tip rounding
- Premium CVD Zinc Selenide (ZnSe) helps reduce thermal effects in high-power CO2 laser applications
- OEM & Industrial Supply: CVD ZnSe axicons for civilian and industrial CO2 laser applications, with custom dimensions and coating options available.
Technical Specifications
| Technical Parameter | Specification |
|---|---|
| Substrate | CVD Zinc Selenide (ZnSe) |
| Design Wavelength | 10.6 μm (CO2 Laser) |
| Apex Angle / Base Angle | Custom fabricated to your exact optical design |
| Angle Tolerance | ± 0.05° (3 arc minutes) |
| Diameter Tolerance | +0.0 / -0.1 mm |
| Center Thickness Tolerance | ±0.1 mm |
| Apex Rounding (Tip Zone) | < 0.2 mm (Strictly controlled via advanced polishing) |
| Surface Figure (Plano Side) | < λ/20 @ 10.6μm |
| Surface Quality | 40-20 Scratch-Dig (Precision Standard) |
| Clear Aperture | > 90% of central diameter |
| AR Coating | BBAR @ 10.6μm (R < 0.5% per surface) |
Need a specific ring diameter or depth of focus? [Contact our engineering team] with your base angle requirements for rapid prototyping and volume OEM manufacturing.
Product Overview
Mastering the Bessel Beam
Unlike standard spherical lenses that focus light to a single point, an Axicon (Conical Lens) features one flat surface and one conical surface. This unique geometry transforms a standard laser beam into a Bessel-like beam or an annular (ring-shaped) focal zone. This deep, extended depth of focus is the absolute core technology for high-aspect-ratio laser drilling and the precision cutting of brittle materials, such as glass and semiconductor substrates.
The Apex Polishing Challenge
The most critical—and difficult—feature of an axicon is the physical tip (apex) of the cone. Standard manufacturing processes often result in severe "rounding" of the apex, which scatters energy and destroys the center of the Bessel beam. We utilize proprietary CNC optical grinding and sub-aperture polishing techniques to strictly minimize apex rounding (< 0.2mm). This helps improve energy concentration and supports a more uniform ring profile for advanced material processing applications.
High-Power Durability & Global Compliance
Continuous-wave (CW) industrial operation requires careful thermal management and stable optical performance. Our axicons are manufactured from high-quality CVD ZnSe and can be supplied with anti-reflective coatings designed to support high-power CO2 laser applications and reduce thermal effects. Custom dimensions, cone angles, and anti-reflective coatings are available to support OEM integration in industrial CO2 laser and beam-shaping systems.
Metrology & Performance Reports
Figure 1: ZnSe Axicon Optical Path & Beam Shaping Schematic
Target Wavelength: 10.6 μm | Material: CVD ZnSe
This schematic illustrates the transformation of a standard Gaussian input beam into a Bessel-like or annular (ring-shaped) focal profile, engineered for beam-shaping applications such as high-aspect-ratio laser drilling and cutting.
Beam Shaping & Profile Analysis
- Optical Function: Unlike standard spherical lenses, the Axicon features a conical surface that refracts incoming light to generate a precision Bessel beam or a distinct annular ring profile.
- Unique Focus: Exhibits no traditional focal point; instead, it creates an extended depth of focus (ring focus) along the optical axis.
- Critical Geometry: The specific conical angle (e.g., 140°) strictly dictates the resulting ring diameter and energy distribution. Angular tolerances down to ±0.05° are available depending on diameter, cone angle, and application requirements.
- Material Advantage: Low-absorption CVD ZnSe helps reduce thermal effects and supports a stable, symmetric ring profile in high-power CO2 laser applications.
- Benefit: Delivers highly uniform energy distribution across the target plane. It is the ultimate optical solution for zero-taper laser drilling, trepanning, and the precision processing of brittle materials like glass or ceramics.It is well suited for applications such as reduced-taper laser drilling, trepanning, and precision processing of brittle materials including glass and ceramics.
Leverage Our Custom Fabrication Capabilities
Struggling with uneven energy distribution, asymmetric ring profiles, or severe apex rounding in your beam shaping optics? We provide end-to-end custom fabrication for ZnSe Axicons, strictly tailoring the base angle and clear aperture to your system’s exact spatial requirements. Connect with an expert engineer to finalize your optical requirements and support integration into your OEM assembly line.