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Meniscus Lenses

Positive Meniscus Lens

Negative Meniscus Lens

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.

This lens shape is best used when one conjugate is relatively far from the lens.

Applications:

●Camera Systems
●Projection Optics System
●Imaging Optics Systems
●Laser Measurements Systems
●Optical View Finder

BK7 Positive Meniscus Lens

Specifications:
Material BK7 grade A optical glass
Design Wavelength 546.1nm
Design Index 1.5183±0.0005
Diameter Tolerance +0.00/-0.15mm
Paraxial Focus Length ±2% @546.1nm
Centration <3 arc minutes
Clear Aperture >Central 85% of diameter
Surface Figure λ/4@632.8nm
Surface Quality 60-40 S/D
Protective Bevel <0.25mm x 45°
BK7 Positive Meniscus Lens Standard Products:
Part No. f (mm) φ(mm) R1(mm) R2(mm) t(mm) te (mm) f(mm)
100.0 25.4 33.720 90.00 4.0 2.5 97.5
125.0 25.4 38.47 90.00 4.0 2.8 121.8
150.0 25.4 42.52 90.00 4.0 3.0 146.3
175.0 25.4 46.05 90.00 4.0 3.1 171.2
200.0 25.4 49.03 90.00 3.5 2.8 197.0
250.0 25.4 83.96 235.00 3.5 2.9 246.5
300.0 25.4 94.08 235.00 3.5 3.0 296.3
350.0 25.4 102.90 235.00 3.5 3.1 346.0
400.0 25.4 110.72 235.00 3.5 3.1 395.8
500.0 25.4 123.90 235.00 3.5 3.2 495.4
600.0 25.4 204.95 600.00 3.5 3.2 595.3
Specifications:
Material BK7 grade A optical glass
Design Wavelength 546.1nm
Design Index 1.5183±0.0005
Diameter Tolerance +0.00/-0.15mm
Paraxial Focus Length ±2% @546.1nm
Centration <3 arc minutes
Clear Aperture >Central 85% of diameter
Surface Figure λ/4@632.8nm
Surface Quality 60-40 S/D
Protective Bevel <0.25mm x 45°
BK7 Negative Meniscus Lens Standard Products:
Part No. f (mm) φ(mm) R1(mm) R2(mm) t(mm) te (mm) f(mm)
-100.0 25.4 90.00 32.590 3.0 4.5 -99.2
-125.0 25.4 90.00 37.26 3.0 4.5 -123.7
-150.0 25.4 90.00 41.42 3.0 4.0 -149.5
-175.0 25.4 90.00 44.86 3.0 3.8 -174.6

Note:

Coatings are available upon request.

Metal Mount is available upon request.

Lenses with material Sapphire, Silicon, Germanium, CaF2, ZnSe etc are also available upon request.

The general tolerance specifications above provide a guideline regarding manufacturing capabilities for optics ranging in size from diameter 0.6-300mm.

The manufacturing limits are not absolute; tighter tolerances may be possible.

Part specific tolerances may vary depending on component size, shape, and/or material.

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