SELFOC® MicroLens - Technical Charts
Table 1 Common Characteristics
| ITEM |
SPECIFICATIONS |
NOTES |
| OPTICAL |
| Maximum Pitch |
0.75P |
Lens length Z = 2πP / √A |
| Lens Effective Diameter |
approx. 60 - 70% lens diameter |
For low loss and low aberration |
| Index Gradient Constant √A Tolerance |
+/- 0.75% max. |
Within same ion exchange batch |
| Index Gradient Constant √A Tolerance |
+/- 2.5% max. |
Between ion exchange batches |
| MECHANICAL |
| Lens Diameter Tolerance |
+5 / -10 µm |
Excluding SLW-3.0 and SLW-4.0 |
| Lens Diameter Tolerance |
+0 / -20 µm |
For SLW-3.0 and SLW-4.0 |
| Lens Length (Z) Tolerance * |
+/- 2.5% of nominal length |
Adjusted according to √A variation |
| Lens Length (Z) Tolerance * |
+0 / -40 µm (vs.calculation) |
Machining and polishing tolerance |
| Minimum Lens Length |
2.0 mm for non-coated lenses
2.3 mm for AR coated lenses |
|
| Facet Perpendicularity |
6 mrad max. |
|
| Ellipticity |
3 µm |
Dmax - Dmin |
| Glass Material |
Oxide Glass |
|
| OTHERS |
| Temperature |
350 °C |
max. operating temp. for lens material |
| Humidity |
(Will react with non-coated lens) |
Store in dessicant to avoid moisture. See Storage / Handling. |
| Radiation |
(Varies by dose and wavelength) |
Contact NSG America for reference data |
* Total lens length (Z) tolerance includes variations from both √A and machining/polishing.
** The Surface Quality Specs apply to complete, round, flat end surfaces perpendicular to the cylindrical axis of the lens. It does not apply to the flat portion of the angled end surface.
Table 2 Standard Lens Specifications
| SML Type |
Features |
On-Axis N.A. |
Diameter(mm) |
Standard Pitch(es) |
Standard Wavelength (nm) |
| SLH |
"High" field of view (74°) |
0.60 |
1.8 |
0.25 |
1310/1550 |
| SLW |
"Wide" field of view (55°) |
0.46 |
1.0 |
0.25 |
1310/1550 |
| SLW |
"Wide" field of view (55°) |
0.46 |
1.8 |
0.23, 0.25 |
1310/1550 |
| SLW |
"Wide" field of view (55°) |
0.46 |
2.0 |
0.25 |
1310/1550 |
| SLW |
"Wide" field of view (55°) |
0.46 |
3.0** |
0.11 |
780 |
| SLW |
"Wide" field of view (55°) |
0.46 |
4.0** |
0.11 |
780 |
** SLW-3.0 and SLW-4.0 lenses with 0.11 pitch are tested for wavefront quality. See section on Specialty Lenses for further details.
Table 3 Optical Parameters
| Wavelength |
Type |
SLW |
SLH |
| N.A.(2θ) |
0.46 (55°) |
0.60 (74°) |
| Dia. (mm) |
1 |
1.8 |
2 |
3 |
4 |
1.8 |
| 630 nm |
N0 |
1.6073 |
1.6354 |
1.6576 |
| √A |
0.608 |
0.339 |
0.304 |
0.207 |
0.154 |
0.430 |
| Z (0.25P) |
2.58 |
4.63 |
5.17 |
7.60 |
10.24 |
3.65 |
| 830 nm |
N0 |
1.5986 |
1.6249 |
1.6457 |
| √A |
0.601 |
0.332 |
0.298 |
0.203 |
0.151 |
0.423 |
| Z (0.25P) |
2.61 |
4.73 |
5.27 |
7.75 |
10.43 |
3.71 |
| 1060 nm |
N0 |
1.594 |
1.6194 |
1.6394 |
| √A |
0.599 |
0.329 |
0.296 |
0.201 |
0.149 |
0.419 |
| Z (0.25P) |
2.62 |
4.77 |
5.31 |
7.85 |
10.54 |
3.74 |
| 1310 nm |
N0 |
1.5916 |
1.6165 |
1.6360 |
| √A |
0.597 |
0.327 |
0.295 |
0.199 |
0.1483 |
0.418 |
| Z (0.25P) |
2.63 |
4.8 |
5.32 |
7.89 |
10.59 |
3.76 |
| 1550 nm |
N0 |
1.5901 |
1.6147 |
1.6340 |
| √A |
0.596 |
0.326 |
0.294 |
0.199 |
0.1478 |
0.417 |
| Z (0.25P) |
2.64 |
4.82 |
5.32 |
7.89 |
10.63 |
3.77 |
|
