1. What's the advantages of using Meniscus Lenses?
It produce a smaller focal point and fewer aberrations than a standard plano-convex lens and enhance image quality.
2. What is Meniscus Lens?
Meniscus lenses have two curved surfaces,convex on one side and concave on the other side. It is thicker at the center than at the edges. When a meniscus lens is combined with another lens, the focal length is shortened and the numerical aperture of the system is increased.
3. What's the applications of Meniscus Lens?
Negative meniscus lenses are often used for Infrared Application. These lenses are used as an alternative to other negative lenses with a greater curvature on the concave side and a smaller curvature on the convex side.
Meniscus Lens Capabilities
Material:
|
Grade A optical glass or Fused Silica
|
Dimension Tolerance:
|
±0.1mm(Standard), ±0.05mm(High Precision)
|
Center Thickness Tolerance:
|
±0.1mm(Standard), ±0.05mm(High Precision)
|
Focal Length:
|
±2%
|
Surface quality:
|
60/40(Standard), 20/10(High Precision)
|
Clear Aperture:
|
>85%
|
Surface Figure:
|
λ/2(Standard), λ/4(High Precision) @633nm
|
Centration:
|
3 arc minutes
|
Bevel:
|
<0.25mm×45°
|
Coating:
|
Upon requirement
|
Meniscus lenses are
widely used in projection systems, imaging systems, and laser
measurement systems. Positive meniscus lenses are usually paired with
lenses with a positive focal length for better focusing, and positive meniscus lens uses a wide range.
|
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
|
Generally speaking, there are two types of spherical lenses. Therefore, a lens formed by combining two spherical surfaces that protrude outwards is called a convex lens, and a lens formed by combining two spherical surfaces into an inwardly curved lens is called a concave lens, which is the convex and concave lens.
Bi-concave
glass lenses are manufactured with both surfaces concave like- glass concave lens. These lenses have negative focal lengths. These lenses
diverge collimated incident light and form virtual images, which are
seen through the lens. They are often used to expand light or increase
focal lengths in existing systems. They are used in laser beam
expanders, optical character readers, viewers, and projection systems.
Anti reflection coatings can be ordered as an option.
