Negative Meniscus Lens (Optical Glass) Feb 4, 2008

Negative Meniscus Lens can function as negative lens which is used for wave expansion without enlarging image difference.

Diameter(mm) R1(mm) R2(mm) Tc(mm) Material
2.8 4.246 8.433 1.9 BaFN10
6.0 4.040 23.390 0.72 SF5
7.0 4.980 29.740 0.84 SF5
8.0 6.620 37.870 0.95 Fused Silica
10.0 8.460 48.499 1.16 SSK4
12.0 12.480 33.101 2.00 SSK4
14.0 9.470 52.081 1.67 BaFN10
16.0 15.580 90.204 1.72 BK7
18.0 17.360 101.112 2.10 BK7
19.0 25.130 100.533 1.50 SSK4
25.0 31.610 85.903 2.00 SSK4
30.0 27.800 100.929 2.47 Fused Silica

SPECIFICATIONS:

Surface Figure(λ=632.8nm) λ/2
Surface Quality 40/20
Centration ≤3 Arc Min
Bevel 0.2mmx45º
Diameter Tolerance +0.0/-0.1mm
Focal Length Tolerance ±1%
Central Thickness Tolerance ±0.1mm
Clear Aperture ≥90% Diameter

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