PRODUCTS

Meniscus Lens
Description
The Positive Meniscus Lenses are a convex-concave lens, but it is thicker at the center than at the edges. They
are felt polished and are used universally in the ophthalmic industry where convention dictates that lens power
be specified in Diopters.
The Negative Meniscus Lenses are a convex-concave lens, but it is thinner at the center than at the edges. Otherwise
description is similar to Plano Concave lenses.
 
Specification:

Material: Optical glass,Fused silica
Design wavelength: 546.1nm
Diameter tolerance: +0/-0.05mm
Focal tolerance: +/-2%
surface quality : 40-20 S/D
Centration: 1 arcmin
Surface flatness: N=3 △N=0.5
Clear aperture: 90%
Bevel: Protective
Coating:                   Optional
Single layer MgF2
Multiple layers BBAR coating
Designed for 0° Angle of Incidenc
 
 
Part No. Material F(mm) Φ(mm) R1(mm) R2(mm) Tc(mm) Te(mm) Fb(mm)
ULMN100254 BK7 100 25.4 33.72 90 4 2.5 97.5
ULMN125254 BK7 125 25.4 38.47 90 4 2.8 121.8
ULMN150254 BK7 150 25.4 42.52 90 4 3 146.3
ULMN175254 BK7 175 25.4 46.05 90 4 3.1 171.2
ULMN200254 BK7 200 25.4 49.03 90 3.5 2.8 197
ULMN250254 BK7 250 25.4 83.96 235 3.5 2.9 246.5
ULMN300254 BK7 300 25.4 94.08 235 3.5 3 296.3
ULMN500254 BK7 500 25.4 123.9 235 3.5 3.2 495.4
ULMN100254N BK7 -100 25.4 90 32.59 3 4.5 -99.2
ULMN125254N BK7 -125 25.4 90 37.26 3 4.2 -123.7
ULMN150254N BK7 -150 25.4 90 41.42 3 4 -149.5
ULMN175254N BK7 -175 25.4 90 44.86 3 3.8 -174.6
ULMN200254N BK7 -200 25.4 90 47.84 3 3.7 -199.6
ULMN300254N BK7 -300 25.4 235 93.13 3 3.5 -298.3
ULMN500254N BK7 -500 25.4 235 122.6 3 3.3 -496.5
ULMN600254N BK7 -600 25.4 600 204.08 3 3.2 -596.8

Ms. Lin

Mr. Wen

Ms.Chen