Spherical Lenses

Negative Meniscus Lenses

Negative Meniscus Lens consists of a convex and a concave surface. A negative meniscus is possible to change the focal length of a system if it works with the other components. It is applied for camera systems, projection systems, etc. Metal housing , standard and broadband antireflection coatings are available upon request, see our standard optics components below.

negative-meniscus-glass-le.jpg

Specifications

Parameter Precision Standard
Diameter Tolerance: +0/-0.05mm +0/-0.1mm
Center Thickness Tolerance: +/-0.05mm +/-0.1mm
Focal Length Tolerance: +/-1% +/-1%
Surface Figure at 632.8 nm(over 90% diameter): λ /8 λ /4
Centration: < 2 arc min < 3 arc min
Surface Quality: 20-10 40-20
Clear Aperture: > 90% > 90%
Coating: custom custom

Negative Meniscus Lenses

Diameter Focal Length Material Center Thickness Edge Thickness Part No.
Φ(mm) f (mm) name Tc(mm) Te(mm) Precision Standard
25.40 -100.00 BK7 3.00 4.70 KTWPF 001 KTWSF 001
25.40 -125.00 BK7 3.00 4.30 KTWPF 002 KTWSF 002
25.40 -150.00 BK7 3.00 4.10 KTWPF 003 KTWSF 003
25.40 -200.00 BK7 3.00 3.80 KTWPF 004 KTWSF 004
25.40 -250.00 BK7 3.00 3.70 KTWPF 005 KTWSF 005
25.40 -300.00 BK7 3.00 3.50 KTWPF 006 KTWSF 006
25.40 -400.00 BK7 3.00 3.40 KTWPF 007 KTWSF 007
25.40 -500.00 BK7 3.00 3.30 KTWPF 008 KTWSF 008
25.40 -1000.00 BK7 3.00 3.20 KTWPF 009 KTWSF 009
50.80 -100.00 BK7 5.00 12.30 KTWPF 010 KTWSF 010
50.80 -125.00 BK7 5.00 10.60 KTWPF 011 KTWSF 011
50.80 -150.00 BK7 5.00 9.60 KTWPF 012 KTWSF 012
50.80 -200.00 BK7 5.00 8.40 KTWPF 013 KTWSF 013
50.80 -250.00 BK7 5.00 7.70 KTWPF 014 KTWSF 014
50.80 -300.00 BK7 5.00 7.20 KTWPF 015 KTWSF 015
50.80 -400.00 BK7 5.00 6.60 KTWPF 016 KTWSF 016
50.80 -500.00 BK7 5.00 6.30 KTWPF 017 KTWSF 017
50.80 -1000.00 BK7 5.00 5.60 KTWPF 018 KTWSF 018