Bena's aspheric lenses are available either with or without anti-reflective coating. The surface of an aspheric lens is designed to eliminate spherical aberration in a range of applications, including imaging, laser focusing applications and bar code scanner. Bena provides aspheric lenses with different materials. In addition to the Zerodur glass ceramics, Bena also supports fused silica, Silicon Carbon, Silicon, Aluminum, RSA, and optical glass such as BK7, B270, HK51, JGS1, JGS2 etc., as well as some metal materials, such as RSA. Bena is specialized in providing customization service for high precision and large diameter aspheric lenses.
The main features of aspheric lenses include:
1. Elimination of spherical aberration: Effectively reduces aberrations and improves image quality.
2. Enhanced focusing ability: Achieves more precise beam focusing.
3. Flatter optical field: Ensures uniformity of the optical field.
4. Multifocal capability: Suitable for various optical needs.
5. Higher optical performance: Excels in a wide range of applications.
These features make aspheric lenses particularly outstanding in applications requiring high image quality and precise focusing.
| Technical Specifications for Customized Aspheric Lenses | |
| Customization | Build-to-print |
| Material | Fused silica, SiC, Si, Al, optical glass, RSA Microcrystalline Aluminium Alloy |
| Diameter | 10 ~ 800nm |
| Diameter tolerance | 0/-0.015mm |
| Surface Quality | 20/10, 10/5 |
| Surface Accuracy | RMS≤λ/80 @ 632.8nm |
| Coating | As required |
| Edge | As required |
| Surface Roughness | Ra ≤ 2nm |
The main application areas of optical aspheric lenses include imaging systems, optoelectronics industry, and military fields. Due to their unique advantages, aspheric lenses are widely used in these areas.
Imaging Systems: Aspheric lenses are used in large-aperture lenses, wide-angle lenses, fisheye lenses, and zoom lenses to expand the field of view, improve image clarity, and reduce distortion. For example, in microscopes, night vision devices, and infrared thermal imagers, aspheric lenses optimize the curvature to effectively reduce or eliminate edge distortions caused by spherical lenses, thereby enhancing image quality.
Optoelectronics Industry: The high focusing ability and low astigmatism of aspheric lenses make them key optical components in laser processing and photolithography equipment. Additionally, aspheric lenses are used in laser beam shaping, such as producing top-hat distributions, which are crucial in material processing and medical fields (e.g., ophthalmic surgery).
Military Field: Aspheric lenses are used in radar rangefinders, optical telescopes, and infrared night vision devices to improve system performance and accuracy. For instance, the AN/AVS-6-night vision goggles used by pilots employ aspheric lenses to enhance imaging effects.
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