Aspheric lenses are critical components in optical systems due to their non-spherical surface profile, which differs from conventional spherical or cylindrical lenses. These lenses are designed to correct optical aberrations, particularly spherical aberration, resulting in improved image quality and reduced blur. Avantier, as an experienced manufacturer of aspheric lenses, offers a wide range of custom solutions tailored for diverse applications ranging from smartphones to lasers and fiber optics, catering to industries such as research, industry, and medicine.
Our aspheric lenses are available with anti-reflection coatings or in uncoated forms, fabricated from glass, crystalline, or plastic substrates. We employ state-of-the-art grinding and polishing metrology equipment, including computer-controlled precision polishing devices and magneto-rheological finishing (MRF) technology, ensuring optimized surface quality for each application. MRF technology enables high-performance finishing with greater efficiency compared to traditional methods, thanks to its precise control of material removal and rapid processing capabilities.
Types of Aspheric Lenses:
An aspheric lens may exhibit various geometries, with most being rotationally symmetric but featuring a complex front surface. Unlike spherical lenses, the curvature of an aspheric lens changes with the distance from the optical axis. This variation in curvature across the lens surface is crucial for correcting aberrations.
Aspheric lenses are characterized by their surface profile, typically described by parameters such as the RMS slope departure (Qbfs) and sag departure from a base conic (Qcon). These parameters quantify the deviation of the lens surface from a best fit sphere or conic, providing a quantitative measure of the asphericity of the lens.
Benefits of Aspheric Lenses:
Improved Image Quality
The controlled curvature of aspheric lenses reduces aberrations, leading to enhanced image fidelity and clarity.
Compact and Lightweight Design
Aspheric lenses enable the design of thinner and flatter optical systems, reducing overall sizes and weights. They also allow for the creation of high-quality systems with fewer lenses, optimizing space and weight, which is crucial for portable devices like cameras.
Increased Design Flexibility
The ability to adjust curvature and shape parameters of aspheric lenses provides optical engineers with greater flexibility in optimizing system performance. This flexibility results in more efficient and cost-effective optical designs with improved performance and reduced complexity.
Overall, aspheric lenses play a vital role in improving image quality, reducing system size and weight, and enhancing design flexibility in optical systems across various industries.