Custom Plano-Concave Lenses

►Introduction of Plano-Concave Lenses

Plano-Concave Lenses have edges that are thicker than the center and flat on one side. Plano-concave lenses are used to expand a light beam or increase the focal length in an optical system. They are commonly used for beam expansion of high peak power pulsed lasers. The beam incident on the concave surface will be focused to a point outside the instrument.

Unwanted air heating and ionization at the focal point may accompany mode disruption or material damage. To avoid this problem, the input lens should be inverted so that the concave surface is not facing the parallel beam.

Plano-Concave lenses are one of the many types of lenses used in optics and photonics systems. They have a negative focal length and are used to diffuse a parallel beam of light into a diverging cone. Plano-concave lenses are formed from a flat surface on one side and a concave on the other. This design works to redirect light from a point source so that it is spread over a larger area.

Plano-concave lenses are distinguished from similar optical components by their focal length and by the shape of their surfaces. A negative focal length indicates that the lens is diverging light rather than focusing or converging it. The concave surface helps to spread the light emanating from the source so that it is evenly distributed. This can be useful for applications such as imaging, imaging systems with structured light, or light guide systems.

Plano-concave lenses are advantageous in many types of optical systems because they can minimize the size of bulky optics. For example, they can be used in telescopes or camera systems to reduce the size of components while still providing the required optical parameters. Additionally, they can be used to eliminate the need for cumbersome optical components such as parabolic mirrors or Fresnel lenses. Plano-concave lenses are also useful for reducing light loss across a system, improving the overall performance and efficiency of the application.

Plano-concave lenses come in a variety of shapes and sizes, depending on the application. Typically, the lenses are made from synthetic quartz, as this material is highly resistant to environmental factors. Additionally, the lenses are usually anti-reflective coated to improve performance. Depending on the application, lenses can also be designed with a shape that supports higher numerical apertures and increased imaging power.

In order to maintain maximum performance, lenses should be mounted with care. The mounting material should be studied to ensure that any shift in the optical system is avoided. This is especially important for larger applications, such as telescopes or cameras, as the slightest displacement can have a significant effect on system performance.

Overall, Plano-concave lenses can be highly advantageous for many imaging, telescope, and light guide designs. When used carefully and properly mounted, they can help to reduce the overall size of the system while still delivering desirable optical parameters. Further, the lenses are extremely durable, making them suitable for a wide range of applications.

Material selection: optical glass, laser crystal, fused silica, anti-radiation glass, infrared and ultraviolet materials, metal materials

Strict dimensional control standards

Custom coating

Wide selection of spherical lenses made of N-BK7, UVFS or CaF2 optical materials, spherical lenses made of N-BK7, UVFS or S-LAH64 optical materials, cylinders and cones (shafts) made of N-BK7 and UVFS cone) lens. The lens forms are plano-convex, plano-concave, double-convex, double-concave, plano-convex cylinder and plano-concave cylinder. Focal lengths vary from -5000 to +10000 mm.

Other specific materials, sizes and anti-reflective (AR) coated lenses are available upon request.

Factory Standard

Shape: Plano-Concave

Diameter Tolerance: ± 0.05mm

Thickness Tolerance: ± 0.05mm

Radius: ± 0.3%

Focal Length Tolerance: ± 1%

Surface Quality: 40-20 Scratch-Dig(After Coating)

Surface Flatness: λ/4 @633 nm

Centration: < 3 arc minutes

Clear Aperture: > 95% of central dimension

►Specification of Plano-Concave Lenses

►Application of Plano-Concave Lenses

The shape of a plano-concave lens consists of a flat surface and an inwardly curved surface. Plano-concave lenses diffuse light and increase the transmission area of light. Besides, it also offsets the aberrations generated by other optical elements in the same optical system. It is often combined with a biconvex lens to form an achromatic lens to expand the diameter of light propagation. Plano-concave lenses are used in optical imaging systems and laser instruments, such as microscopes, eyepieces, condensers and so on.

Plano-Concave Lenses are versatile optical elements used in a wide variety of optical designs and applications that require the reforming of light. These lenses are designed with one planar surface and one concave surface, which allows for the refraction of light in either one or two planes at the same time, depending on the application. Plano-Concave Lenses are available in both positive and negative focal lengths, and are often used in combination with other optical components to form multi-element optical assemblies.

Plano-Concave Lenses are commonly used in a variety of applications, including microscopes and telescopes. The concave surface of the lens allows for magnified images or objects to be viewed without distortion, providing crisp and clear images. They are also used in eyepieces, as the concave surface helps to reduce aberrations that occur in the eye. Spotting scopes, laser optics, and other imaging systems can also benefit from Plano-Concave Lenses, as they can be used to enhance image resolution, reduce glare, and increase efficiency.

These lenses are available in many optical materials, including glass, fluorite, and synthetic crystals. The type of material used will affect the angular field of view, and the level of diffraction that is generated. Plano-Concave Lenses can also be used in combination with other lenses, such as a positive meniscus, to help reduce aberrations in an optical system. This makes them extremely useful in any situation where image clarity and accuracy are essential.

When using any type of Plano-Concave lens, there are a few important factors to consider. It is important to understand the correct size and focal length of the lens in order to obtain the most optimal results. Proper anti-reflection coatings are also necessary to ensure maximum transmission and contrast levels. Depending on the application, the lens may require additional optical components to help improve its performance.

Overall, Plano-Concave Lenses offer a great solution for many optical designs and applications. With their versatile design and ability to adjust the refraction of light, these lenses are an ideal choice for many optical needs. From microscopes and eyepieces to spotting scopes and laser optics, Plano-Concave Lenses can provide unparalleled clarity and accuracy. Whether you need to improve image resolution or reduce aberrations, these lenses have the power to do it all.

RZ Optics Co., Ltd. provides plano-concave lenses with commercial quality, precision quality and high precision quality. The diameter of plano-concave  lenses can be 6-280mm. 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. We also coat Plano-Concave Lenses 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 plano-concave lenses?

Please send us design drawings or custom parameters, including diameter, optical material, surface accuracy, surface quality and the requirement of 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.

RZ Optics Co., Ltd. produces high-quality plano-concave lenses, including optical glass plano concave lenses, fused silica plano concave lenses and silicon plano concave lenses. 

N-BK7 Plano-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 plano-concave lenses are often used in various optical imaging systems.

Fused Silica Plano-Concave Lenses

Fused silica has good spectral performance and low refractive index in the ultraviolet, visible and near-infrared spectrum (about 185-2500nm). Its chemical stability and good mechanical properties allow it to be used in harsh environments. Fused silica plano-concave lenses are used in optical imaging systems and high-power lasers.

Silicon Plano-Concave Lenses

Silicon has 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 high refractive index and small dispersion. Silicon lenses are widely used in infrared missile optical systems.