Meniscus Lens, Glass Lens

Detailed Product Description

Meniscus Lens, Glass Lens:

 

Meniscus lens, also called convex-concave lens, can be either positive or negative, depending on the relative curvatures of the two surfaces. A negative meniscus lens has a steeper concave surface and will be thinner at the centre than at the periphery. Conversely, a positive meniscus lens has a steeper convex surface and will be thicker at the centre than at the periphery. It is used in conjugation with other lenses to form an optical system, which to make the original
 
lens has longer or shorter focal length. The material can be BK7 Grade A or other equivalent optical glass. AR or NIR coating can be ordered for specific application.

 

Specifications-Model No.: Lotmc0010
Material	BK7 Grade A or equivalent optical glasses
Design Wavalength	546.1nm
Diameter Tolerance	±0.1mm, ±0.15mm for Dia.≥75mm
Paraxial Focus Length	±2%
Centration	<3 arc minutes
Clear Aperture	>85%
Surface Figure	λ/4 at 632.8nm
Surface Quality	60-40 scratch and dig
Coatings	Antireflection coatings or NIR coatings
Bevel	A slight protective bevel

 

For different applications, there are various choices in the specifications, which must be determined according to users specific requirements.