Sapphire Spherical Glass Lens 25.4mm

Overview:

Positive meniscus (convex-concave) lenses are designed to minimize spherical aberration. When used in combination with another lens, a positive meniscus lens will shorten the focal length and increase the numerical aperture (NA) of the system without introducing significant spherical aberration. When used to focus a collimated beam, the convex side of the lens should face the source to minimize spherical aberration. Star Optic provides positive meniscus lenses in a variety of substrates and anti-reflection coating options.

General Specifications Of N-BK7 Positive Meniscus Lens: 

Material	N-BK7, UV FS, N-SF11, CaF2, Si, Ge, ZnSe, Sapphire
Design Wavelength	546.1nm
Surface Flatness	N<3(0.5)@632.8nm
Surface Quality	60/40 scratch-Dig
Diameter Tolerance	+0/-0.2mm
Thickness Tolerance	±0.2mm
Centration	<3 arc minutes
Focal Length Tolerance	±2%
Clear Aperture	>90%
Chamfer	Protective<0.5mmx45°

Standard Products Of N-BK7 Positive Meniscus Lens:

Coating Options Of N-BK7 Positive Meniscus Lens:

Star Optic's above standard positive meniscus lenses are uncoated. In order to reduce the amount of light reflected from each surface of the lens, antireflection coatings including singer layer MgF2, multi-layer AR coating, Broadband multi-layer AR coating and Dual wavelength AR coating are also available.

Single Layer MgF2 Coating	Multi-layer Anti-Reflective Coating
Boradband Anti-Reflective Coating	Dual Wavelength Anti-Reflective Coating

Mounting Options For Positive Meniscus Lens:

Star Optic's above standard positive meniscus lenses are not mounted. However, we can provide fixed mount and adjustable mount for our lenses.

Custom Your Own Lens:

You have your full design freedom, and we are able to work with complex designs to get you exactly what you need including optical design, mechanical design and optical coating design.