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Meniscus lens

​The meniscus lens is a meniscus lens. The lens has an outer convex mirror surface and an inner concave mirror surface. The meniscus lens is divided into positive meniscus lens and negative meniscus lens:

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The meniscus lens is a meniscus lens. The lens has an outer convex mirror surface and an inner concave mirror surface.

The meniscus lens is divided into positive meniscus lens and negative meniscus lens:
               

Positive meniscus (convex) lenses are designed to minimize spherical aberration. When used in conjunction with another lens, a positive meniscus lens can reduce the focal length, thereby increasing the system numerical aperture (NA) without introducing significant spherical aberration. When used to converge parallel light, the convex surface of the lens should face the light source to minimize spherical aberration.

Negative meniscus (convex) lenses are designed to minimize spherical aberration in optical systems. When used in conjunction with another lens, a negative meniscus lens can increase the focal length, thereby reducing the system numerical aperture (NA). When used to converge parallel light, the convex surface of the lens should face the light source to minimize spherical aberration.

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Basic technical parameters
Dimensional tolerance ± 0.05mm
Surface accuracy 1 / 2λ, λ / 4 per φ25.4mm

Eccentricity: ≥1 ′
Smoothness 60-40, 40-20, 20-10, 10-5
Chamfer 0.2-0.3mm × 45 °
Clear aperture:> 90%
Polishing: High-precision double-sided polishing

Meniscus lenses are often used in systemsBeam expansion lens, imaging lens, converging lens.


"Quality first, customer first, development and innovation"
Nanjing April Electro-Optics Ltd. founded in 2012, is specialized in high-precision cold processing of crystal materials, with sapphire, quartz and optical glass as raw materials. Core products including window, lens, crystal rod, prism, ball, filter, cylindrical mirror, ball cover, and so forth. 

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