Meniscus Lens and Their Application

Meniscus lens is a lens which has two spherical curved surfaces, convex on one side and concave on the other side.

It is thicker at the center than at the edges. The lens provides a smaller beam diameter in order to reduce the beam waste and spherical aberration. When a meniscus lens is combined with another lens, the focal length is shortened and the numerical aperture of the system is increased. This reduces the image distortion and increases image resolution.

There are two types of meniscus lensesmeniscus lenses: positive meniscus lenses and negative meniscus lenses.

Positive lenses are used in applications that require small focal number, which is less than 2.5. For focal numbers ranging between 2.5 and 10, meniscus lens can minimize spot size and enhance image quality. The concave side of the positive lens has a smaller curvature, and the convex side has a greater curvature.

Negative meniscus lenses are used for applications using infrared materials with high refractive index. 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. They are used in beam expanding applications that require minimal spherical aberration.

References

 

features

Positive meniscus lenses and Negative meniscus lenses

Positive meniscus lenses is convex-concave lens thicker at the center than at the edges. They are used to minimize spherical aberration. When used in combination with another lens, it’s will shorten the focal length, and increase the NA of system.

1. Frequently Used for Beam Focusing Applications
2. Minimizes the Increase in Spherical Aberrations for Multi-Element Systems

Negative meniscus lenses is convex-concave lens thinner at the center than edges. They increase the divergence of the beam without introducing any significant spherical aberration. When used in combination with another lens, they will increase the focal length, and decrease the NA of the system.

1. Frequently Used for Beam Expanding Applications
2. Minimizes the Increase in Spherical Aberrations for Multi-Element Systems

Specification:

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)
Paraxial 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

Note for Spherical Lens:
a. Other optical glass materials from Schott, Ohara, Hoya or Chinese CDGM, UVFS from Heraeus, Corning, Germanium, Silicon, ZnSe, ZnS, CaF2, Sapphire are also available upon request .
b. Custom-made Spherical Lenses at any size from diameter 1.0 to 300mm are available upon request.

One stop service  for Vision Optics-Laser Optics-Medical Optics-5G Optical Communication-Military Optics.

Typical Sizes

Item No.

Φ(mm)

f(mm)

R1(mm)

R2(mm)

Tc(mm)

Te(mm)

Fb(mm)

Material

N-BK7

MNP201

25.4

100

33.42

89.95

4

2.39

96.01

MNP202

25.4

150

42.36

89.95

4

2.95

145.2

MNP203

25.4

200

48.75

89.95

3.5

2.72

194.51

MNP204

25.4

250

83.95

235.5

3.5

2.88

245.97

MNP205

25.4

300

94.19

235.5

3.5

2.98

296.27

MNP206

25.4

400

110.92

235.5

3.5

3.11

396.06

MNP207

25.4

500

124.17

235.5

3.5

3.19

496.16

MNP208

25.4

1000

278.34

600

3.5

3.3

993.7

MNN201

25.4

-100

89.95

32.51

3

4.68

-98.79

MNN202

25.4

-150

89.95

41.21

3

4.11

-148.06

MNN203

25.4

-200

89.95

47.64

3

3.82

-197.82

MNN204

25.4

-250

235.5

83.18

3.5

4.13

-248.62

MNN205

25.4

-300

235.5

93.33

3.5

4.03

-299.04

MNN206

25.4

-400

235.5

109.65

3.5

3.9

-397.33

MNN207

25.4

-500

235.5

122.74

3.5

3.82

-496.94

MNN208

25.4

-1000

600

277.16

3

3.1

-995.3

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Meniscus lens is a lens which has two spherical curved surfaces, convex on one side and concave on the other side.

It is thicker at the center than at the edges. The lens provides a smaller beam diameter in order to reduce the beam waste and spherical aberration. When a meniscus lens is combined with another lens, the focal length is shortened and the numerical aperture of the system is increased. This reduces the image distortion and increases image resolution.

There are two types of meniscus lenses: positive meniscus lenses and negative meniscus lenses.

Positive lenses are used in applications that require small focal number, which is less than 2.5. For focal numbers ranging between 2.5 and 10, meniscus lens can minimize spot size and enhance image quality. The concave side of the positive lens has a smaller curvature, and the convex side has a greater curvature.

Negative meniscus lenses are used for applications using infrared materials with high refractive index. 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. They are used in beam expanding applications that require minimal spherical aberration.

References

 

features

Positive meniscus lenses and Negative meniscus lenses

Positive meniscus lenses is convex-concave lens thicker at the center than at the edges. They are used to minimize spherical aberration. When used in combination with another lens, it’s will shorten the focal length, and increase the NA of system.

1. Frequently Used for Beam Focusing Applications
2. Minimizes the Increase in Spherical Aberrations for Multi-Element Systems

Negative meniscus lenses is convex-concave lens thinner at the center than edges. They increase the divergence of the beam without introducing any significant spherical aberration. When used in combination with another lens, they will increase the focal length, and decrease the NA of the system.

1. Frequently Used for Beam Expanding Applications
2. Minimizes the Increase in Spherical Aberrations for Multi-Element Systems

Specification:

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)
Paraxial 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

Note for Spherical Lens:
a. Other optical glass materials from Schott, Ohara, Hoya or Chinese CDGM, UVFS from Heraeus, Corning, Germanium, Silicon, ZnSe, ZnS, CaF2, Sapphire are also available upon request .
b. Custom-made Spherical Lenses at any size from diameter 1.0 to 300mm are available upon request.

One stop service  for Vision Optics-Laser Optics-Medical Optics-5G Optical Communication-Military Optics.

Typical Sizes

Item No.

Φ(mm)

f(mm)

R1(mm)

R2(mm)

Tc(mm)

Te(mm)

Fb(mm)

Material

N-BK7

MNP201

25.4

100

33.42

89.95

4

2.39

96.01

MNP202

25.4

150

42.36

89.95

4

2.95

145.2

MNP203

25.4

200

48.75

89.95

3.5

2.72

194.51

MNP204

25.4

250

83.95

235.5

3.5

2.88

245.97

MNP205

25.4

300

94.19

235.5

3.5

2.98

296.27

MNP206

25.4

400

110.92

235.5

3.5

Want more information on Precision Convex spherical surfaces? Feel free to contact us.

3.11

396.06

MNP207

25.4

500

124.17

235.5

3.5

3.19

496.16

MNP208

25.4

1000

278.34

600

3.5

3.3

993.7

MNN201

25.4

-100

89.95

32.51

3

4.68

-98.79

MNN202

25.4

-150

89.95

41.21

3

4.11

-148.06

MNN203

25.4

-200

89.95

47.64

3

3.82

-197.82

MNN204

25.4

-250

235.5

83.18

3.5

4.13

-248.62

MNN205

25.4

-300

235.5

93.33

3.5

4.03

-299.04

MNN206

25.4

-400

235.5

109.65

3.5

3.9

-397.33

MNN207

25.4

-500

235.5

122.74

3.5

3.82

-496.94

MNN208

25.4

-1000

600

277.16

3

3.1

-995.3

Are you interested in learning more about Bi-Concave Lenses? Contact us today to secure an expert consultation!