Request a quote Small Axicon Lenses
Custom small axicon lenses for annular and Bessel-like beam generation.
Product Overview
Small axicon lenses use a conical refracting surface rather than a spherical surface; the exact form must be established from the drawing.
In an appropriate setup, an axicon can generate an annular beam or an approximate Bessel beam over a finite propagation region.
Material, diameter, cone angle, tip geometry, thickness and coating requirements can be specified for manufacturing review.
Applications
- Laser Alignment & Optical Metrology: Generating annular illumination for ring-based alignment and optical measurement experiments.
- Biomedical Imaging Research: Generating Bessel-like excitation beams in specially designed extended-focus microscopy systems.
- Optical Trapping & Life-Science Research: Shaping light into annular or Bessel-like distributions within particle and cell manipulation setups.
- Laser Micromachining Research: Generating extended-focus beam profiles for transparent-material processing experiments, subject to laser-damage and tip-quality requirements.
Typical Specifications
| Parameter | Standard Grade | Precision Grade |
|---|---|---|
| Materials | N-BK7, Quartz, CaF₂, MgF₂, ZnSe, ZnS, and other optical glass upon request | N-BK7, Quartz, CaF₂, MgF₂, ZnSe, ZnS, and other optical glass upon request |
| Diameter | 5–300 mm | 5–300 mm |
| Diameter Tolerance | +0 / −0.10 mm | +0 / −0.02 mm |
| Center Thickness Tolerance | ±0.10 mm | ±0.02 mm |
| Radius of Curvature Tolerance | ±0.5%–±1% | ±0.1% |
| Surface Figure | λ/4 @ 632.8 nm | λ/10 @ 632.8 nm |
| Surface Quality (Scratch–Dig) | 40–20 | 20–10 / 10–5 |
| Surface Roughness (Ra) | ≤1.0 nm | ≤0.3 nm |
| Centration Error | <3′ | <30″ |
| Angle / Wedge | 1′–5′ | 1″–10″ |
| Coating | AR / HR, etc., to customer requirements | AR / HR, etc., to customer requirements |
Other specifications, materials, and coatings are available upon request.