Optical Lenses Customizable Double Concave Lenses

►Introduction of Bi-Concave Lenses

Double concave lenses, also known as bi-concave lenses, are optical lenses that have two inward-curving concave surfaces. They are typically used in combination with other lenses to expand the beam of light, reduce its size, or correct aberrations.

One of the main benefits of double concave lenses is their ability to diffuse parallel rays of light in an outward direction. This makes them ideal for use in beam expansion applications, as they can increase the diameter of a beam while maintaining its collimation. This property is particularly useful in applications like laser cutting and welding, where precise control over the beam diameter is essential.

Double concave lenses are also commonly used in projectors and optical instruments to expand the size of an image or correct spherical aberrations. When used in combination with a positive lens, the double concave lens can also be used to reduce the size of the aperture and increase the depth of field.

Double concave lenses can be made from a variety of materials, including optical glass, silicon, and fused silica. Optical glass is a popular choice due to its high optical quality and low dispersion, which makes it an excellent choice for precision applications. Silicon, on the other hand, has a low thermal expansion coefficient and is highly resistant to temperature changes, making it an ideal choice for high-temperature applications. Fused silica is another popular choice due to its high transmittance, low coefficient of thermal expansion, and excellent resistance to chemical corrosion.

Regardless of the material used, double concave lenses are typically designed to be thin in the center and thicker at the edges. This shape helps to reduce spherical aberrations and produce a clearer, more focused image. Double concave lenses can also be manufactured with various coatings to improve their performance, such as anti-reflective coatings to reduce unwanted reflections or polarization coatings to filter out certain wavelengths of light.

Overall, double concave lenses are a versatile optical component that can be used in a wide range of applications. Whether you need to expand, reduce, or correct the beam of light, a double concave lens can help you achieve the precise focusing and collimation you require.

RZ Optics Co., Ltd. produces bi-concave lenses with commercial quality, precision quality, and high precision quality. Available optical materials include optical glass, fused silica, and silicon. The highest accuracy of diameter tolerance can be ±0.02mm. The highest accuracy of irregularity and surface quality can be λ/10 and 20-10. RZ Optics coats optical components according to the needs of customers, including single-layer magnesium fluoride anti-reflection coating, broadband anti-reflection coating, single-wavelength anti-reflection coating, and dual-band anti-reflection coating.

We are specialized in optical manufacturing of optical lenses, including plano-convex lenses, plano-concave lenses, bi-convex lenses, bi-concave lenses, achromatic lenses, and meniscus lenses. Spherical lenses are often found in optical imaging systems, laser optics, infrared optics, and medical optics. Besides, they are used for Defense & Aerospace, Life & Science, and other fields.

►How can you get custom biconcave lenses?

Please send us design drawings or custom parameters, including diameter, optical material, surface accuracy, surface quality, and the requirement for optical coating. Don't forget to add the requirement of quantities and lead time. Of course, the simplest way is direct to contact us for more information.

N-BK7 Bi-Concave Lenses

N-BK7 (Equivalent Material CDGM H-K9L) is crown glass with a transmission range of visible light and near-infrared spectrum (350nm-2000nm). N-BK7 possesses excellent optical, mechanical, and chemical properties and is cost-effective. N-BK7 double concave lenses are often used in various optical imaging systems.

Fused Silica Bi-Concave Lenses

Between 185-2500nm, fused silica biconcave lenses have good transmittance. Fused silica has stable chemical properties, high-temperature resistance, and a low laser damage threshold. It is suitable for laser optical systems.

Silicon Bi-Concave Lenses

Silicon has a metallic luster and is blocked in the visible light band. It has good transmittance in the infrared band (3-5μm). As a commonly used infrared optical material, silicon has a high refractive index and small dispersion. Silicon lenses are widely used in infrared missile optical systems.

RZ Optics Co., Ltd. produces high-quality bi-concave lenses, according to your requirements. We strictly control the parameters of bi-concave lenses to ensure the precise design of each batch of custom Fused Silica Bi Concave Lenses, custom N-BK7 Bi Concave Lenses, custom 1064nm Bi Concave Lenses, and other custom Bi Concave lenses. For more information, please contact us.