A biconvex lense is a straightforward lense made out of two spherical convex surfaces that typically have the same radius of curvature. Applications for biconvex lenses include, but are not limited to, medium-quality imaging, various optical apparatus, and the focusing and control of laser beams.
Alfa Chemistry is the preferred partner for a wide range of custom biconvex lenses manufactured to customer specification ranges, with custom options available with anti-reflective coatings or without coatings. Our highly skilled professionals test each product in our state-of-the-art metrology lab to ensure it meets standards. For more information about your custom achromatic lense needs, please contact our technical sales team.
Our Capabilities
The optical material is a crucial requisite for a biconvex lense. The lense's durability and other optical characteristics, such as its refractive index and refraction, depend on the optical material utilized. Biconvex lenses are created by Alfa Chemistry utilizing substrates like BK7 glass, quartz, sapphire, fused silica, CaF2, ZnSe, and germanium. For the best possible surface quality, each of our lenses is meticulously polished, and the edges are finely honed and beveled. Our custom biconvex lens line is available with uncoated or anti-reflective coatings for visible to near infrared applications.
Below are examples of our standard manufacturing capabilities. In addition to supplying custom biconvex lenses to meet customer requirements, we can also provide edge stock lenses for quick turnaround.
| Diameter | 3 mm to 200 mm+ |
| Dimension Tolerance | +0/-0.1 mm |
| Thickness Tolerance | ±0.1 mm |
| Focal Length | 3 mm to 1000 mm+ |
| Focal Length Tolerance | ±1% |
| Centration | < 3 arcseconds |
| Surface Figure | < 0.1 fringes |
| Scratch/Dig | < 10/5 |
| Clear Aperture | >90% |
| Flatness | λ/4@632.8 nm |
| Edges | Fine ground and beveled |
| Material | BK7, Fused Silica, Quartz, Sapphire, etc |
| Antireflection Coating | Yes / No / on request |
Applications:
Large multi-lense assemblies frequently have biconvex lenses. Our biconvex lenses work best in situations where the virtual image and object are on opposite sides of the lense. When the image and object are at similar distances from the lense, aberrations, chromatic aberrations, and spherical aberrations are minimized and the conjugate ratio should be between 0.2 and 5. Biconvex lenses work best, on average, with magnifications between 1/5 and 5. Plano-convex lenses may be preferred when images of objects at greater distances are required.
Quality Assurance
Each custom biconvex lense is carefully tested to all applicable standards using state-of-the-art metering equipment. We inspect and scrutinize every product before it's shipped to customers, so customers can have complete confidence that the optics they order will be the best fit for their application.
Alfa Chemistry is always looking to expand and work with customers to achieve their specifications, so please feel free to contact our technical sales team for more information and guidance on your enquiry.