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Details |
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Meniscus Lenses
Meniscus Lens can increase the NA of the system while only adding slightly to the total spherical aberrations. The Negative Meniscus Lens is used to increase the focal length of another lens while maintaining the angular resolution of the optical assembly.
Application:
Camera System
Projection Optics System
Imaging Optics System
Laser Measurements System
Optical View Finder
Positive Meniscus Lens：
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Material |
BK7 grade A optical glass |
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Design Wavelength |
546.1 nm |
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Design Index: |
1.5183 ± 0.0005 |
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Diameter Tolerance |
+0.00, -0.15 mm |
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Thickness Tolerance |
±0.2 mm |
|
Paraxial Focal Length |
±2% |
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Centration |
<3 arc minutes |
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Clear Aperture |
>85% |
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Surface Irregularity |
λ/4@632.8 nm |
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Surface Quality |
60-40 scratch and dig |
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Protective Bevel |
0.25 mm x 45° |
BK7 Positive Meniscus Lens Standard Products:
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Part No. |
f (mm) |
Ф(mm) |
R1 (mm) |
R2(mm) |
t c(mm) |
t e(mm) |
f b(mm) |
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DIT41 |
100.0 |
25.4 |
33.72 |
90.0 |
4.0 |
2.5 |
97.5 |
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DIT42 |
125.0 |
25.4 |
38.47 |
90.0 |
4.0 |
2.8 |
121.8 |
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DIT43 |
150.0 |
25.4 |
42.52 |
90.0 |
4.0 |
3.0 |
146.3 |
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DIT44 |
175.0 |
25.4 |
46.05 |
90.0 |
4.0 |
3.1 |
171.2 |
Note: Other material, size and coating are available upon request.
Negative Meniscus Lens：
|
Material |
BK7 grade A optical glass |
|
Design Wavelength |
546.1 nm |
|
Design Index: |
1.5183 ± 0.0005 |
|
Diameter Tolerance |
+0.00, -0.15 mm |
|
Paraxial Focal Length |
±2% |
|
Centration |
<3 arc minutes |
|
Clear Aperture |
>85% |
|
Surface Irregularity |
λ/4@632.8 nm |
|
Surface Quality |
60-40 scratch and dig |
|
Protective Bevel |
0.25 mm x 45° |
BK7 Negative Meniscus Lens Standard Products:
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Part No. |
f (mm) |
Ф(mm) |
R1 (mm) |
R2(mm) |
t c(mm) |
t e(mm) |
f b(mm) |
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DIT45 |
-100.0 |
25.4 |
90.0 |
32.59 |
3.0 |
4.5 |
-99.2 |
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DIT46 |
-125.0 |
25.4 |
90.0 |
37.26 |
3.0 |
4.2 |
-123.7 |
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DIT47 |
-150.0 |
25.4 |
90.0 |
41.42 |
3.0 |
4.0 |
-149.5 |
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DIT48 |
-175.0 |
25.4 |
90.0 |
44.86 |
3.0 |
3.8 |
-174.6 |
Note: Other material, size and coating are available upon request. |
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