Gradient Index Microlenses
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Optical glass with a
refractive index gradient provides a very efficient and simple way to produce
high quality imaging lenses. The material used in these Microlenses is Selfoc®.
This material has a radial index gradient which causes focusing to occur within
the material. The index variation is defined by and is normally specified by
the constant (check)A. The simplest form of gradient index lens is a simple
cylinder of Selfoc®. Collimated light incident on one end of the
lens will be focused as it travels along the length of the cylinder. These
Microlenses are particularly useful for fiber and diode coupling since they can
be mounted in close proximity to the source. They are ideal for use in optical
data transmission. We offer gradient index Microlenses with Plano end faces and
also in a convex configuration for greater imaging power. The convex lenses
have a spherical radius on one end only. Normally these lenses are a quarter
pitch so that they focus a collimated input at the remote face of the lens.
However, we also offer lenses having slightly less than 1/4 pitch so that they
focus just outside the lens. This is often more convenient since contact with
the source or detector may be physically impossible. Two different numerical
apertures are offered, 0.46 and 0.6. These lenses are wavelength specific. They
are supplied for the wavelengths 633, 830, 1300 and 1560 nm and are
anti-reflection coated for these wavelengths. They will work at other
wavelengths but their focusing characteristics will vary from the published
figures and the coatings will not be optimized.
Specifications & Tolerances
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Diameter:
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±0.02mm |
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Parallelism:
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<10arcmin |
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Aperture:
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70% of
diameter |
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Length:
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+0,
-0.04mm |
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Index
gradient: |
±0.75% |
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Material:
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Doped
borosilicate glass |
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Coating:
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NMAR
V-coat |
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Gradient index material provides the focusing capabilities
of a lens by providing a continuously variable index of refraction across the
profile of a cylindrical rod. In other words, a spherical (or even aspherical
lens) can be replicated with a cylindrical rod of glass. |
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Gradient index Microlenses (convex or plano) are
easy to mount, easy to use, and are most effective in fiber optic coupling arrangements
where only on-axis aberrations need to be addressed. |
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Gradient Index Convex Microlenses |
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Range (nm) |
N.A. |
Diameter,
D |
Length,
L (mm) |
Pitch
|
Refractive
Index (axial) |
Index Constant A (mm-1) |
Price |
Availability
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Product
Number |
|
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(inch)
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(mm) |
|||||||||
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830 |
0.46 |
0.07 |
1.8 |
4.7 |
0.25 |
1.60 |
0.33 |
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from stock |
024-1110 |
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830 |
0.60 |
0.07 |
1.8 |
3.0 |
0.20 |
1.65 |
0.42 |
|
from stock |
024-1130 |
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1300 |
0.46 |
0.07 |
1.8 |
4.8 |
0.25 |
1.59 |
0.33 |
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from stock |
024-1140 |
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- |
- |
- |
- |
- |
- |
- |
- |
|
- |
- |
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1300 |
0.60 |
0.07 |
1.8 |
3.0 |
0.20 |
1.64 |
0.42 |
|
from stock |
024-1160 |
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1560 |
0.46 |
0.07 |
1.8 |
4.8 |
0.25 |
1.59 |
0.33 |
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from stock |
024-1170 |
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1560 |
0.60 |
0.07 |
1.8 |
3.0 |
0.20 |
1.63 |
0.42 |
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from stock |
024-1190 |
® Selfoc is
a registered trademark of Nippon Sheet Glass Company.
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Gradient index material
provides the focusing capabilities of a lens by providing a continuously variable
index of refraction across the profile of a cylindrical rod. In other words,
a spherical (or even aspherical lens) can be replicated with a cylindrical
rod of glass. |
|
|
Gradient index
microlenses (convex or plano) are easy to mount, easy to use, and are most
effective in fiber optic coupling arrangements where only on-axis aberrations
need to be addressed. |
|
Gradient Index Plano Microlenses
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Range (nm) |
N.A. |
Diameter,
D |
Length,
L (mm) |
Pitch
|
Refractive
Index (axial) |
Index Constant A (mm-1) |
Price |
Availability
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Product
Number |
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(inch)
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(mm) |
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633 |
0.46 |
0.04 |
1.0 |
2.6 |
0.25 |
1.61 |
0.61 |
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from stock |
024-0130 |
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633 |
0.46 |
0.07 |
1.8 |
4.6 |
0.25 |
1.61 |
0.40 |
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from stock |
024-0140 |
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633 |
0.46 |
0.07 |
1.8 |
4.3 |
0.23 |
1.61 |
0.40 |
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from stock |
024-0160 |
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633 |
0.60 |
0.07 |
1.8 |
3.7 |
0.25 |
1.66 |
0.40 |
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from stock |
024-0180 |
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633 |
0.46 |
0.08 |
2.0 |
5.2 |
0.25 |
1.61 |
0.30 |
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from stock |
024-0220 |
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- |
- |
- |
- |
- |
- |
- |
- |
|
- |
- |
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830 |
0.46 |
0.04 |
1.0 |
2.6 |
0.25 |
1.60 |
0.60 |
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from stock |
024-0330 |
|
830 |
0.46 |
0.07 |
1.8 |
4.7 |
0.25 |
1.60 |
0.33 |
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from stock |
024-0340 |
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830 |
0.46 |
0.07 |
1.8 |
4.4 |
0.23 |
1.60 |
0.33 |
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from stock |
024-0360 |
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830 |
0.60 |
0.07 |
1.8 |
3.7 |
0.25 |
1.65 |
0.33 |
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from stock |
024-0380 |
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- |
- |
- |
- |
- |
- |
- |
- |
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- |
- |
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830 |
0.46 |
0.08 |
2.0 |
5.3 |
0.25 |
1.60 |
0.30 |
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from stock |
024-0440 |
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1300 |
0.46 |
0.04 |
1.0 |
2.6 |
0.25 |
1.59 |
0.60 |
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from stock |
024-0460 |
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1300 |
0.46 |
0.07 |
1.8 |
4.8 |
0.25 |
1.59 |
0.33 |
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from stock |
024-0470 |
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1300 |
0.46 |
0.07 |
1.8 |
4.4 |
0.23 |
1.59 |
0.33 |
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from stock |
024-0490 |
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1300 |
0.60 |
0.07 |
1.8 |
3.8 |
0.25 |
1.64 |
0.33 |
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from stock |
024-0560 |
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- |
- |
- |
- |
- |
- |
- |
- |
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- |
- |
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1300 |
0.46 |
0.08 |
2.0 |
5.3 |
0.25 |
1.60 |
0.30 |
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from stock |
024-0580 |
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1560 |
0.46 |
0.04 |
1.0 |
2.6 |
0.25 |
1.59 |
0.60 |
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from stock |
024-0660 |
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1560 |
0.46 |
0.07 |
1.8 |
4.8 |
0.25 |
1.59 |
0.33 |
|
from stock |
024-0670 |
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1560 |
0.46 |
0.07 |
1.8 |
4.4 |
0.23 |
1.59 |
0.33 |
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from stock |
024-0690 |
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1560 |
0.60 |
0.07 |
1.8 |
3.8 |
0.25 |
1.63 |
0.33 |
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from stock |
024-0780 |
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1560 |
0.46 |
0.08 |
2.0 |
5.3 |
0.25 |
1.59 |
0.29 |
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from stock |
024-0880 |
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Merci de contacter Infos Photon Lines pour tout renseignement complémentaire. |
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