Specification :

Plano convex lens, Plano concave lens,
Bi-convex len, Bi-concave lens, Meniscus lens, Achromatic lens etc.
Specification of meniscus lens as follow:
* Material BK7 or other optical materials
* Dimension Tolerance + 0.0~ -0.1mm
* Center Thickness + / -0.1mm
* Focal Length Tolerance+ / -1%
* Surface Quality: 60/ 40
* Surface Figure: » / 2@ 633nm on plano side
* Clear Aperture > 90%
* Chamfer 0.25mm at 45 degree typical
* Coating Optional