Double Concave (Bi Concave) Lenses (BCV, DCV, CVCV) (Uncoated and AR coated )
Double Concave lenses have spherical inward radius. Thinner at the center than at the edges. This shape causes light rays to diverge (spread out, expand) and the focal length is negative.
Estimated Shipping Date: December 24, 2024 - January 7, 2025
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- Description
- Applications
Double Concave (Bi-Concave) Lenses: description, key functions and advantages
Double concave (bi concave) lenses have spherical inward radius. These Alien Photonics lenses are thinner at the center than at the edges. This shape causes light rays to diverge (spread out) and the focal length is negative. Double concave lenses can be used to expand the laser beam.
What is the purpose and key functions of Double Concave (Bi-Concave) Lenses?
Image Reduction:
In optical systems, these lenses can be used to reduce the size of an image before it is processed by another optical element.
Correcting Optical Aberrations
In combination with other lenses, double concave lenses can help correct spherical aberrations in optical systems.
Double Concave (Bi Concave) advantages over Plano Concave Lens
In laser-based applications, the choice between using a double concave or a plano-concave lens largely depends on the specific needs of the application, such as whether uniform beam divergence or precise beam control and shaping is required. Double concave lenses are better suited for applications that benefit from uniform beam expansion and divergence.
Double Concave lenses for beam divergence
Double concave lenses are particularly useful in applications where beam divergence is desired. They can spread a laser beam uniformly, which is beneficial in applications requiring a diffused laser output rather than a focused point.
Beam expansion using Double Concave (DCV) lenses
Alien Photonics double concave lenses can be used to increase the diameter of a laser beam before it is introduced to another optical component (e.g. HR, DBHR, BBHR mirror or polarizer. This can be crucial in setups where the beam size needs to be adjusted for optimal interaction with other optical elements or for achieving a specific coverage area.
Double concave lenses for uniform light distribution:
Due to their symmetrical shape, double concave lenses offer a more uniform light distribution, which can be advantageous in applications where even dispersion of laser light is necessary, such as in certain types of imaging or scanning systems.
Double Concave (Bi-Concave) Lenses for lasers, spectroscopy and other high-precision optical systems
Zinc Selenide (ZnSe) Double Concave (Bi Concave) Lenses for CO₂ lasers
Alien Photonics double concave lenses made of Zinc Selenide (ZnSe) are primarily used in CO₂ laser systems, which operate in the mid-infrared spectrum, typically around the 10.6 µm wavelength. These lenses are ideal for beam expansion and shaping within these systems, allowing for precise control over the laser beam's profile.
Fluoride (CaF₂, MgF₂, BaF₂) Double Concave (Bi Concave) Lens for broadband optical applications
Alien Photonics fluoride double concave lenses find their utility in applications requiring a broad wavelength range, from the ultraviolet (UV) through the visible (VIS) and into the infrared (IR). These lenses are especially useful in spectroscopy, UV imaging systems, and laser applications.
UVFS Double Concave (Bi-Concave) Lens for high precision optical systems
UV-grade Fused Silica (UVFS) double concave lenses are favored for their exceptional optical clarity and high transmission rates from the deep ultraviolet (around 185 nm) to the near-infrared (up to 2.1 µm). Alien Photonics bi-concave lenses are crucial in high-precision optical systems, such as lithography equipment used in semiconductor manufacturing, where precise control over UV light is necessary.