BK7 Spherical Lens

BK7 spherical lenses are useful for a wide range of applications. BK7 plano-concave, biconcave, meniscus, plano-convex and biconvex lenses are manufactured to exacting Shanghai Optics laser-quality surface figure and surface quality specifications. This high standard of quality ensures exceptional performance in demanding applications,  including high-energy laser applications.

These spherical singlet lenses are made from BK7 and can be supplied with AR coatings or left uncoated.

BK7 Spherical Lens

Lens Configurations and Designs

BK7 lenses are designed with a spherical surface and are available in multiple configurations, including plano-concave, biconcave, meniscus, plano-convex, and biconvex lenses. Convex lenses, for instance, are typically used in applications requiring a positive focal length, allowing them to focus light effectively in imaging and laser systems.

Focusing and Infinite Conjugates

Lenses with a positive focal length, such as plano-convex and biconvex lenses, are ideally suited for focusing applications involving infinite conjugates. These lenses can image objects from long distances, making them essential in precision imaging and laser-based systems.

Minimizing Spherical Aberration

BK7 lenses are designed to minimize spherical aberration, ensuring optimal image clarity and focus across the entire field. This makes them particularly suitable for high-energy laser applications and other demanding optical systems, where precise focus and minimal distortion are critical.

High-Quality Optical Material

The optical material used in BK7 lenses is known for its low inclusions and excellent uniformity, offering high transparency and durability. These lenses are ideally suited for applications requiring precise control of light and can be supplied with or without anti-reflective (AR) coatings to further enhance performance.

Applications of BK7 Lenses

BK7 spherical lenses, made from high-quality optical material, are widely used in various optical applications, particularly for focusing tasks. These lenses are commonly found in imaging systems, laser systems, and other precision instruments due to their exceptional optical properties and versatility.

Factory Standard

• Substrate Material: Bk7 glass
• Shape: Spherical P-Concave, P-Convex, Bi-concave, Bi-convex, Concave-Convex or Aspheric
• Surface Figure:  l/10 at 633nm before coating
• Surface Quality: 10-5 Shanghai Optics Laser Quality
• Dimensional Tolerance: + 0.00mm, – 0.1mm
• Thickness Tolerance: +/- 0.1mm
• Chamfer: 0.15mm at 45° typical
• Concentricity: 0.05mm
• Focal Length Tolerance: +/- 0.5% typical
• Clear Aperture: Exceeds central 85% of dimension