A Positive Meniscus Lens is a type of lens with a convex surface that faces the incoming light and a concave surface that faces away from the light. This lens has a thicker middle part compared to the edges, resulting in a positive focal length.
Positive Meniscus Lenses are commonly used in optical systems for various applications. They are used in camera lenses to correct for spherical aberration, in telescopes to provide magnification, in eyeglasses to correct for farsightedness, and in laser systems to focus the laser beam. They are also used in scientific instruments such as microscopes, spectrometers, and telescopes.
Positive Meniscus Lens factory processing capability:
| Parameter |
Range |
| Size |
10-300mm or custom |
| Size tolerance |
+/-0.02mm or custom |
| Focal length |
+/-1% or custom |
| Surface quality |
40-20 or custom |
| Clear aperture |
>90% |
| Flateness |
λ/10@632.8nm |
| Centration |
<30 seconds |
| Bevel |
<0.2mm✖45° |
| Coating |
custom |
| Material |
BK7, fused silica, CaF2, Znse |
Part of Positive Meniscus lens we processed. The list goes on. Please check with our sales engineer.
| Model |
Diameter |
EFL |
R1 |
R2 |
Center thickness (Tc） |
Edge thickness (Te) |
| PM025.4L100 |
25.4 |
100 |
32.14 |
82.2 |
3.6 |
2.0 |
| PM025.4L125 |
25.4 |
125 |
40.6 |
106.86 |
3.3 |
2.0 |
| PM025.4L150 |
25.4 |
150 |
49.1 |
131.81 |
3.1 |
2.0 |
| PM025.4L200 |
25.4 |
200 |
66.2 |
182.57 |
2.8 |
2.0 |
| PM025.4L250 |
25.4 |
250 |
83.4 |
234.19 |
2.6 |
2.0 |
| PM025.4L300 |
25.4 |
300 |
100.9 |
288.3 |
2.5 |
2.0 |
| PM025.4L400 |
25.4 |
400 |
136.5 |
402.03 |
2.4 |
2.0 |
| PM025.4L500 |
25.4 |
500 |
172.9 |
523.7 |
2.3 |
2.0 |
| PM025.4L1000 |
25.4 |
1000 |
371.6 |
1331.26 |
2.2 |
2.0 |
| PM025.4L50 |
25.4 |
50 |
20.58 |
90 |
6 |
2.5 |
| PM050.8L100 |
50.8 |
100 |
30.34 |
65.8 |
9.7 |
1.1 |
| PM050.8L125 |
50.8 |
125 |
39.2 |
93.08 |
8.2 |
2.4 |
| PM050.8L150 |
50.8 |
150 |
47.9 |
119.51 |
7.3 |
2.7 |
| PM050.8L200 |
50.8 |
200 |
65.2 |
171.87 |
6.2 |
2.9 |
| PM050.8L250 |
50.8 |
250 |
82.54 |
224.69 |
5.5 |
3.0 |
| PM050.8L300 |
50.8 |
300 |
100.10 |
279.28 |
5.1 |
3.0 |
| PM050.8L400 |
50.8 |
400 |
135.8 |
393.38 |
5.0 |
3.4 |
| PM050.8L500 |
50.8 |
500 |
172.3 |
515.42 |
5.0 |
3.7 |
| PM050.8L1000 |
50.8 |
1000 |
371.5 |
1326.56 |
5.0 |
4.4 |
