Meniscus Lenses

A Meniscus Lens, or Convex-concave Lens, is an optical lens with one concave and one convex surface, each having different radii of curvature. Meniscus lenses can be categorized into two types:

• Positive Meniscus Lens: The convex side is more curved than the concave side, resulting in a positive focal length. This type is used to converge light, reduce focal lengths, and increase the numerical aperture (NA) of optical systems, making it useful for improving image resolution and focusing lasers.
• Negative Meniscus Lens: The concave side is more curved than the convex side, leading to a negative focal length. This lens diverges light, increasing the focal length and reducing the NA of optical assemblies, which is beneficial for expanding beams.

Specifications:

Lens Form	Positive/Negative meniscus Lens
Diameter Tolerance	+0.0/-0.1mm
Diameter Range	1mm -300mm
Thickness Tolerance	±0.1mm
Clear Aperture	>90%
Surface Quality	40/20 S/D
Focal Length Tolerance	±2%
Irregularity	λ/4 @ 633 nm (λ/8 optional)
Material	BK7, Fused Silica, CaF2, BaF2, MgF2, ZnSe, GaAs, Ge, Sapphire, Etc.

 

Detailed Advantages:

• Positive Focal Length: Biconvex lenses have positive focal lengths, making them ideal for converging collimated light to a single point.
• Versatile Applications: These lenses are highly versatile and can be used in a wide range of applications, including modulation and focusing of laser beams and imaging instruments.
• Optimal for Specific Conditions: Biconvex lenses are particularly recommended when the absolute finite conjugate ratio is equal to or close to 1:1, minimizing spherical, coma, and distortion.
• Customizable Materials: Kingwin Optics offers biconvex lenses made from various materials such as Fused Silica, BK7/N-BK7, BaF2, CaF2, MgF2, Ge, ZnSe, Sapphire, catering to diverse needs.
• Broad Spectrum Compatibility: The working wavelengths of these lenses span the UV to IR spectrum, ensuring compatibility with a wide range of optical systems.
• Custom Coating Options: With options like uncoated substrates, Broadband Anti-reflection (BBAR) coatings, V-coating, and MgF2 AR coatings, customers can choose the coating that best suits their requirements.
• Tailored Specifications: Diameters, focal lengths, and the f/number of the biconvex lenses can be customized according to specific requests, ensuring optimal performance for each application.
• High Precision Option: The surface irregularities of the lenses can be the conventional λ/4 or λ/8 if higher precision is required, providing flexibility for precision-critical applications.

Applications:

• Laser Beam Modulation and Focusing: Biconvex lenses are widely used in modulating and focusing laser beams due to their ability to converge collimated light to a point.
• Imaging Instruments: These lenses play a crucial role in imaging instruments, enhancing the quality and accuracy of the images produced.
• Optical Systems with Specific Conjugate Ratios: Biconvex lenses are particularly advantageous in optical systems where the absolute finite conjugate ratio is equal to or close to 1:1, minimizing aberrations.
• Scientific Research and Industrial Applications: The versatility and customizable features of biconvex lenses make them suitable for a wide range of scientific research and industrial applications.

Kingwin Optics offers a comprehensive range of custom Biconvex Lenses tailored to meet the unique requirements of various applications. Made from high-quality materials such as Fused Silica, BK7/N-BK7, BaF2, CaF2, MgF2, Ge, ZnSe, and Sapphire, these lenses ensure optimal performance across the UV to IR spectrum. With customizable coating options and specifications like diameters, focal lengths, and the f/number, Kingwin Optics provides biconvex lenses that are perfectly suited for each customer’s needs. Additionally, the company offers a large inventory of standard N-BK7 Biconvex Lenses and UV Fused Silica Biconvex Lenses, ensuring quick access to high-quality optical components for a wide range of applications.