Overview: An achromatic lens or achromat is a lens that is designed to limit
the effects of chromatic and spherical aberration. Achromatic
lenses are corrected to bring two wavelengths (typically red and
blue) into focus on the same plane. The most common type of achromat is the achromatic doublet, which
is composed of two individual lenses made from glasses with
different amounts of dispersion. Typically, one element is a
negative (concave) element made out of flint glass such as F2,
which has relatively high dispersion, and the other is a positive
(convex) element made of crown glass such as BK7, which has lower
dispersion. The lens elements are mounted next to each other, often
cemented together, and shaped so that the chromatic aberration of
one is counterbalanced by that of the other. Achromatic Lenses are ideal for a range of applications, including
fluorescence microscopy, image relay, inspection, or
spectroscopy. General Specifications Of Negative Achromatic Lens: | Material | N-BK7, N-SF2, N-SF5, N-SF10, N-SF11 | | | Design Wavelength | 632.8nm | | 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° | | Coating | Single layer MgF2 coating @550nm |
Standard Products Of Negative Achromatic Lens: | Part No. | Material | D (mm) | f (mm) | R1 (mm) | R2=R3 (mm) | R4 (mm) | Tc (mm) | Te (mm) | | NDBT12F-25 | N-BaF10 / N-SF10 | 12.7 | -25 | 17.75 | 12.17 | 109.75 | 4.6 | 5.9 | | NDBT12F-35 | N-BaF10 / N-SF10 | 12.7 | -40 | 27.82 | 19.65 | 201.68 | 8.5 | 9.3 | | NDBT25F-50 | N-BaF10 / N-SF10 | 25.4 | -50 | 35.51 | 24.58 | 217.99 | 6.6 | 9.3 | | NDBT25F-75 | N-BK7 / N-SF5 | 25.4 | -75 | 46.07 | 36.65 | 108 | 6.6 | 8.9 | | NDBT25F-100 | N-BaF10 / N-SF10 | 25.4 | -100 | 70.57 | 45.27 | 412.67 | 4.6 | 5.8 | | NDBT25F-150 | N-BK7 / N-SF5 | 25.4 | -150 | 92.30 | 68.87 | 204.15 | 6.6 | 7.7 |
Coating Options Of Achromatic Lens: Star Optic offers a large variety of Achromatic Lenses. The above
standard achromatic lens are coated with single layer MgF2 centered
at 550nm. We have other multiple anti-reflection coating options
for the Ultraviolet (UV), visible, or Infrared (IR) are available,
including UV-VIS, VIS-NIR, NIR II, or SWIR. Additionally,
Achromatic Lenses designed specifically for the Ultraviolet (UV) or
Infrared (IR) are available, which offer superior performance when
compared to a standard Achromatic Lens that has been coated for the
same or comparable wavelength range. | Single Layer MgF2 Coating | Multi-layer Anti-Reflective Coating | | | Boradband Anti-Reflective Coating | Dual Wavelength Anti-Reflective Coating | | |
Mounting Options For Achromatic Lens: An Achromatic Lens, which is often designed by either cementing two
elements together or mounting the two elements in a housing,
creates smaller spot sizes than comparable singlet lenses. Our
standard achromatic lenses are unmounted. 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 |
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