Negative Meniscus Lens, N-BK7, Minimize Spherical Aberration Lens Overview:
Negative meniscus (convex-concave) lens is designed to
minimize spherical aberration in optical systems. When used in
combination with another lens, a negative meniscus lens will
increase the focal length and decrease the numerical aperture (NA)
of the system without introducing significant spherical aberration.
When used to diverge light, the convex surface should face the beam
to minimize spherical aberration. Star Optic provides positive
meniscus lenses in a variety of substrates and anti-reflection
coating options.
General Specifications Of N-NK7 Negative Meniscus Lens:
| Material | N-BK7, UV FS, N-SF11, CaF2, Si, Ge, ZnSe, Sapphire | | | Design Wavelength | 546.1nm | | Surface Flatness | N<3(0.5)@632.8nm | | Surface Quality | 60/40 scratch-Dig | | Diameter Tolerance | +0/-0.2mm | | Thickness Tolerance | ±0.2mm | | Centration | <3 arc minutes | | Focal Length Tolerance | ±2% | | Clear Aperture | >90% | | Chamfer | Protective<0.5mmx45° |
Standard Products Of N-NK7 Negative Meniscus Lens: | Part No. | Material | D
(mm) | f
(mm) | R1
(mm) | R2
(mm) | Tc
(mm) | Te
(mm) | Fb
(mm) | | NMEND25F-100 | N-BK7 | 25.4 | -100 | 100 | 33.7 | 3 | 4.7 | -98.7 | | NMEND25F-150 | N-BK7 | 25.4 | -150 | 100 | 43.1 | 3 | 4.1 | -148 | | NMEND25F-200 | N-BK7 | 25.4 | -200 | 100 | 50.2 | 3 | 3.8 | -197.3 | | NMEND25F-300 | N-BK7 | 25.4 | -300 | 250 | 95.1 | 3 | 3.5 | -297.8 | | NMEND25F-400 | N-BK7 | 25.4 | -400 | 250 | 112.5 | 3 | 3.4 | -397 | | NMEND25F-500 | N-BK7 | 25.4 | -500 | 250 | 126.3 | 3 | 3.3 | -496.3 | | NMEND25F-1000 | N-BK7 | 25.4 | -1000 | 500 | 253.2 | 3 | 3.2 | -994.6 |
Coating Options Of N-NK7 Negative Meniscus Lens: Star Optic's above standard negative meniscus lenses are
uncoated. In order to reduce the amount of light reflected from
each surface of the lens, antireflection coatings including singer
layer MgF2, multi-layer AR coating, Broadband multi-layer AR
coating and Dual wavelength AR coating are also available. | Single Layer MgF2 Coating | Multi-layer Anti-Reflective Coating | | | Boradband Anti-Reflective Coating | Dual Wavelength Anti-Reflective Coating | | |
Mounting Options For Negative Meniscus Lens: Star Optic's above standard negative meniscus lenses are not
mounted. However, we can provide fixed mount and adjustable mount
for our lenses. Fixed Lens Mount | | Adjustable Lens Mount | |
Custom Your Own Lens: You have your full design freedom, and we are able to work with
complex designs to get you exactly what you need including optical
design, mechanical design and optical coating design. Zemax Deisgn | Zemax Deisgn | Solidworks Design | Thin Film Coating Design |
| 
