Name: AT001 Crescent lens 420MM-680MM H-LAK2A
Brand: DiMU
SKU: AT001
Availability: InStock

AT001 Crescent lens 420MM-680MM H-LAK2A

DiMU Optoelectronics specializes in customized processing, with a minimum order quantity of one piece

999999 in stock (can be backordered)

SKU: AT001 Category: Crescent Lens

Description

Meniscus lenses are concave convex lenses. This lens has an outward convex mirror surface and an inward concave mirror surface. If the outward curvature is greater than the inward curvature, the lens has a positive focal length and is used as a magnifying glass; If the concave curvature is large and the convex curvature is small, it is a negative meniscus lens, which can be used to replace other negative lenses.Bent moon lenses are used to significantly reduce spherical aberration, resulting in smaller focal points and fewer aberrations compared to flat convex lenses, thereby improving imaging quality. When used in combination with another lens, a positive meniscus lens can shorten the focal length, thereby increasing the numerical aperture (NA) of the system without introducing significant spherical aberration. When used to converge collimated light, the convex surface of the lens should face the light source.

POSITIVE CRESCENT LENS

A positive crescent lens is composed of two curved surfaces with similar radii of curvature and has a positive focal length. Usually used to reduce the focal length of another lens, increase the numerical aperture, and other related applications. To reduce spherical aberration, the beam should be incident on the convex surface of the lens when expanding, contracting, or diverging collimated light applications; When used for converging and collimating light, the beam is incident on a concave surface.
The positive crescent lens is mainly used to minimize spherical aberration. When used in combination with another lens, the positive meniscus lens can reduce the focal length and increase the system numerical aperture (NA) without introducing significant spherical aberration. When used to converge parallel light, in order to minimize spherical aberration, the convex surface of the lens should face the direction of the light source emission. Coated lenses are also widely used in visible and near-infrared applications.

NEGATIVE CRESCENT LENS

A negative crescent lens is a concave lens, meaning that both sides of the lens have inward concave surfaces.
A negative crescent lens causes parallel rays to diverge, appearing to come from the focal point, hence it has a negative focal length. This type of lens is typically used to disperse light, reduce the apparent size of objects, or to correct visual problems such as myopia.
A negative crescent lens will cause light to bend outward after passing through the lens, resulting in a negative spherical aberration. This results in a reduction effect during imaging, making the object appear smaller.
In short, positive and negative meniscus lenses have different uses and effects in optical applications. A positive meniscus lens can focus light, making objects appear larger, while a negative meniscus lens disperses light, making objects appear smaller. They are key elements in optical systems used in various applications, including photography, glasses, microscopes, and telescopes.

Additional information

Weight	0.01 kg
diameter	7mm-7.9mm
Thickness	1mm-1.93mm
Material	H-LAK2A
Radius R1	0mm
Radius R2	0
Coating	420-680
Focal length	35mm
inventory	Ready to ship

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About brand

DiMU originates from the fusion of "Diminutive Microcosm", symbolizing the brand's commitment to exploring subtle details in the optical world, combining precision technology with humanistic visual needs, and presenting clear, comfortable, and personalized visual experiences for every pair of eyes.

DiMU takes optical technology as its cornerstone and user visual health as its center, continuously pursuing a "clearer, easier, and more comfortable" visual experience

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-50%1mm-1.93mm

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