 INFRARED LASER OPTICS
1 STANDARD SPECIFICATIONS
|
Flatness/Form Error
Parallelism
Centration
Surface Finish
Diameter/length
Thickness
Clear Aperture
Radius of Curvature
Focal Length
Design Wavelength
Higher Tolerances |
: /40 per 25mm diameter @ 10.6µ
: 1 arc minute
: 3 arc minute
: 40-20 scratch- dig
: +0.0/-0.2mm
: ± 0.2mm
: ³ 85% of central area
: ± 2%
: ± 2%
: 10.6µm
: On request
|  |
|
2 MATERIALS
|
Zinc Selenide
Silicon
Copper (mirror) |
Germanium
Potassium Chloride
Copper-Nickel-Gold (mirror) |
Molybdenum (mirror) |
| Beryllium mirrors (on request) |
|
3 COMPONENTS
3.1 Windows/Partial Reflectors/Beam Splitter/Output Couplers
Anti-reflection and partial reflection coatings have to be selected separately from the coating specification section to complete customer's component requirement.
Concave radii of curvature available are 1,2,3,4,5,6,8,10,15,20and 30 metres (other radii and plano convex surfaces and Zinc Sulphide components are supplied on request).
|
|
Ordering information |
| Dia.(mm) | Edge Thick (mm) | Plano/Plano | Plano/Concave |
| | | ZnSe | Ge | Si | KCl | ZnSe | Ge | Si |
| 19 | 3 | 1010 | 1030 | 1050 | 1070 | 1110 | 1130 | 1150 |
| 25 | 3 | 1011 | 1031 | 1051 | 1071 | 1111 | 1131 | 1151 |
| 25 | 6 | 1012 | 1032 | 1052 | 1072 | 1112 | 1132 | 1152 |
| 25.4 | 3 | 1013 | 1033 | 1053 | 1073 | 1113 | 1133 | 1153 |
| 25.4 | 6 | 1014 | 1034 | 1054 | 1074 | 1114 | 1134 | 1154 |
| 28 | 3 | 1015 | 1035 | 1055 | 1075 | 1115 | 1135 | 1155 |
| 28 | 6 | 1016 | 1036 | 1056 | 1076 | 1116 | 1136 | 1156 |
| 30 | 5 | 1017 | 1037 | 1057 | 1077 | 1117 | 1137 | 1157 |
| 38.1 | 3 | 1018 | 1038 | 1058 | 1078 | 1118 | 1138 | 1158 |
| 38.1 | 5 | 1019 | 1039 | 1059 | 1079 | 1119 | 1139 | 1159 |
| 38.1 | 6 | 1020 | 1040 | 1060 | 1080 | 1120 | 1140 | 1160 |
| 40 | 5 | 1021 | 1041 | 1061 | 1081 | 1121 | 1141 | 1161 |
| 44.5 | 3 | 1022 | 1042 | 1062 | 1082 | 1122 | 1142 | 1162 |
| 44.5 | 6 | 1023 | 1043 | 1063 | 1083 | 1123 | 1143 | 1163 |
| 50 | 5 | 1024 | 1044 | 1064 | 1084 | 1124 | 1144 | 1164 |
| 50.8 | 5 | 1025 | 1045 | 1065 | 1085 | 1125 | 1145 | 1165 |
Please add anti-reflection coating on ZnSe, Ge or Si requirement separately using coating prefix (see under coating) and request for quote. |
|
3.2 Lenses
3.2.1 ZnSe Plano Convex Lenses
These are the most economical lenses generally used for laser applications where spherical aberration concerns are not critical, e.g. infrared radiation collection, laser heat treatment, cutting and welding. They are very efficient in large f-number systems (f/no ³
8)
|
|
Ordering information
Dimensions in mm except where specified |
| p/n | dia | efl | ct | et | p/n | dia | efl | ct | et | p/n | dia | efl | ct | et |
| 1200 | 19 | 38 | 2.9 | 2.0 | 1210 | 1.0" | 2.0" | 3.6 | 2.5 | 1220 | 1.1" | 2.5" | 5.3 | 4.2 |
| 1201 | 19 | 50 | 2.7 | 2.0 | 1211 | 1.0" | 2.5" | 3.4 | 2.5 | 1221 | 1.1" | 3.75" | 4.9 | 4.2 |
| 1202 | 25 | 50 | 3.6 | 2.5 | 1212 | 1.0" | 3.0" | 3.3 | 2.5 | 1222 | 1.1" | 5.0" | 4.8 | 4.2 |
| 1203 | 25 | 63.5 | 3.4 | 2.5 | 1213 | 1.0" | 4.0" | 3.1 | 2.5 | 1223 | 1.1" | 7.5" | 4.6 | 4.2 |
| 1204 | 25 | 75 | 3.3 | 2.5 | 1214 | 1.0" | 5.0" | 3.0 | 2.5 | 1224 | 1.5" | 2.0" | 5.6 | 3.0 |
| 1205 | 25 | 100 | 3.1 | 2.5 | 1215 | 1.1" | 2.5" | 4.1 | 3.0 | 1225 | 1.5" | 2.5" | 5.1 | 3.0 |
| 1206 | 25 | 150 | 2.9 | 2.5 | 1216 | 1.1" | 3.0" | 3.9 | 3.0 | 1226 | 1.5" | 3.75" | 4.4 | 3.0 |
| 1207 | 25 | 200 | 2.8 | 2.5 | 1217 | 1.1" | 3.75" | 3.7 | 3.0 | 1227 | 1.5" | 5.0" | 4.0 | 3.0 |
| 1208 | 25 | 250 | 2.7 | 2.5 | 1218 | 1.1" | 5.0" | 3.6 | 3.0 | 1228 | 1.5" | 7.5" | 3.7 | 3.0 |
| | | | | | 1.1" | 7.5" | 3.4 | 3.0 | 1229 | 1.5" | 2.5" | 8.8 | 6.2 |
| | | | | | | | | | 1230 | 1.5" | 3.75" | 7.6 | 6.2 |
| | | | | | | | | | 1231 | 1.5" | 5.0" | 7.2 | 6.2 |
| | | | | | | | | | 1232 | 1.5" | 7.5" | 6.9 | 6.2 |
Please add anti-reflection coating requirement separately using coating prefix (see under coating) |
|
3.2.2 ZnSe Positive Meniscus Lenses
Positive meniscus lenses are the preferred design for lenses with short f-numbers to minimise aberrations and improve image quality in critical applications. These are commonly used in collimated systems.
|
|
Ordering information
Dimensions in mm except where specified |
| p/n | dia | efl | ct | et | p/n | dia | efl | ct | et | p/n | dia | efl | ct | et |
| 1240 | 19 | 19 | 3.8 | 2.0 | 1250 | 1.1" | 1.0" | 6.0 | 3.0 | 1260 | 1.5" | 1.5" | 6.7 | 3.0 |
| 1241 | 19 | 25 | 3.2 | 2.0 | 1251 | 1.1" | 1.5" | 4.9 | 3.0 | 1261 | 1.5" | 2.0" | 5.7 | 3.0 |
| 1242 | 19 | 38 | 2.9 | 2.0 | 1252 | 1.1" | 2.0" | 4.4 | 3.0 | 1262 | 1.5" | 2.5" | 5.1 | 3.0 |
| 1243 | 19 | 50 | 2.3 | 2.0 | 1253 | 1.1" | 2.5" | 4.1 | 3.0 | 1263 | 1.5" | 3.0" | 4.7 | 3.0 |
| 1244 | 25 | 25 | 4.9 | 2.5 | 1254 | 1.1" | 3.75" | 3.8 | 3.0 | 1264 | 1.5" | 3.75" | 4.5 | 3.0 |
| 1245 | 25 | 38 | 4.0 | 2.5 | 1255 | 1.1" | 1.0" | 7.2 | 4.2 | 1265 | 1.5" | 1.5" | 9.7 | 6.0 |
| 1246 | 25 | 50 | 3.6 | 2.5 | 1256 | 1.1" | 1.5" | 6.1 | 4.2 | 1266 | 1.5" | 2.0" | 8.7 | 6.0 |
| 1247 | 25 | 63.5 | 3.4 | 2.5 | 1257 | 1.1" | 2.0" | 5.6 | 4.2 | 1267 | 1.5" | 2.5" | 8.1 | 6.0 |
| 1248 | 25 | 75 | 3.2 | 2.5 | 1258 | 1.1" | 3.75" | 8.4 | 4.2 | 1268 | 1.5" | 3.75" | 7.5 | 6.0 |
Please add anti-reflection coating requirement separately using coating prefix (see under coating) |
|
3.2.3 Biconvex Lenses
The symmetrical geometry of this design has the advantage of cancelling out image distortion effects at near or equal conjugate distances. They are also used in collimated beam application with short focal length (low f-number) but aberration performance will be poor. However, they produce better image than plano-convex.
|
|
Ordering information
Dimensions in mm except where specified |
| p/n | dia | efl | ct | et | p/n | dia | efl | ct | et | p/n | dia | efl | ct | et |
| 1270 | 19 | 19 | 3.7 | 2.0 | 1280 | 1.1" | 1.0" | 5.8 | 3.0 | 1290 | 1.5" | 1.5" | 6.4 | 3.0 |
| 1271 | 19 | 25 | 3.3 | 2.0 | 1281 | 1.1" | 1.5" | 4.8 | 3.0 | 1291 | 1.5" | 2.0" | 5.5 | 3.0 |
| 1272 | 19 | 38 | 2.8 | 2.0 | 1282 | 1.1" | 2.0" | 4.4 | 3.0 | 1292 | 1.5" | 2.5" | 5.0 | 3.0 |
| 1273 | 19 | 50 | 2.6 | 2.0 | 1283 | 1.1" | 2.5" | 4.1 | 3.0 | 1293 | 1.5" | 3.0" | 4.7 | 3.0 |
| 1274 | 25 | 25 | 4.7 | 2.5 | 1284 | 1.1" | 3.75" | 3.7 | 3.0 | 1294 | 1.5" | 3.75" | 4.4 | 3.0 |
| 1275 | 25 | 38 | 4.0 | 2.5 | 1285 | 1.1" | 1.0" | 7.0 | 4.2 | 1295 | 1.5" | 1.5" | 9.4 | 6.0 |
| 1276 | 25 | 50 | 3.6 | 2.5 | 1286 | 1.1" | 1.5" | 6.0 | 4.2 | 1296 | 1.5" | 2.0" | 8.5 | 6.0 |
| 1277 | 25 | 63.5 | 3.4 | 2.5 | 1287 | 1.1" | 2.0" | 5.6 | 4.2 | 1297 | 1.5" | 2.5" | 8.0 | 6.0 |
| 1278 | 25 | 75 | 3.2 | 2.5 | 1288 | 1.1" | 3.75" | 4.9 | 4.2 | 1298 | 1.5" | 3.75" | 7.4 | 6.0 |
Please add anti-reflection coating requirement separately using coating prefix (see under coating)
Biconcave Lenses in ZnSe and other lenses in Germanium and Silicon supplied on request |
|
3.3 Mirrors
All the mirrors will have a flatness/sphericity of l
/20 @ 10.6µm, parallelism of 3 arc minute, surface finish of 20-10 scratch-dig, and radius of curvature (r.o.c) tolerance of ±2%. Available standard r.o.c. are 0.25, 0.5, 1, 2, 3, 4, 5, 6, 7.5, 10, 15, 20 and 30 metres.
3.3.1 Copper-Nickel-Gold Mirrors
These mirrors give a 99% reflectivity @ 10.6µm. They are commonly used for beam bending/steering of CO2, CO and YAG lasers. Water cooled versions give excellent stability for resonators and high power applications.
|
|
Ordering information
|
| Air Cooled | Water Cooled |
| Size (dia. x thick) | Shape | | Size (dia x thick) | Shape | |
| Flat | Curve | | Flat | Curve |
| 25mm x 6mm | 1301 | 1311 | 25mm x 15mm | 1321 | 1331 |
| 38mm x 6mm | 1302 | 1312 | 38mm x 15mm | 1322 | ----- |
| 38mm x 10mm | 1303 | 1313 | 38mm x 20mm | ----- | 1333 |
| 50mm x 15mm | 1304 | 1314 | 50mm x 25mm | 1324 | 1334 |
| 75mm x 15mm | 1305 | 1315 | 75mm x 25mm | 1325 | 1335 |
| 100mm x 25mm | 1306 | 1316 | 100mm x 25mm | 1326 | 1336 |
|
3.3.2 Maximum reflectivity Copper Mirrors
These mirrors are made of copper nickel with dielectric coating resulting in reflectivity of more than 99.8% at 10.6µm. The coating minimised phase shifts and therefore avoids polarisation errors, common with most mirrors making them ideal for use as resonators and multi-pass mirror systems.
|
|
Ordering information
|
| Air Cooled | Water Cooled |
| Size (dia. x thick) | Shape | | Size (dia x thick) | Shape | |
| Flat | Curve | | Flat | Curve |
| 25mm x 6mm | 1341 | 1351 | 25mm x 15mm | 1361 | 1371 |
| 38mm x 6mm | 1342 | 1352 | 38mm x 15mm | 1362 | ----- |
| 38mm x 10mm | 1343 | 1353 | 38mm x 20mm | ----- | 1373 |
| 50mm x 15mm | 1344 | 1354 | 50mm x 25mm | 1364 | 1374 |
| 75mm x 15mm | 1345 | 1355 | 75mm x 25mm | 1365 | 1375 |
| 100mm x 25mm | 1346 | 1356 | 100mm x 25mm | 1366 | 1376 |
|
3.3.3 Molybdenum mirrors
Molybdenum mirrors have the highest laser damage threshold for any tested material, typically 220KW/cm2 for CO2 cw laser, has low thermal distortion, high conductivity and therefore preferred in extreme high power application for durability. The polished surface is very hard and scratch resistant, making it possible to wiped clean dusty surfaces with a soft cloth. No coating is required and the bare polished surface gives a reflectivity greater than 98% at 10.6µm.
|
|
Ordering information
|
| Air Cooled |
| Size (dia. x thick) | Shape | | Size (dia x thick) | Shape | |
| Flat | Curve | | Flat | Curve |
| 25mm x 3mm | 1381 | 1391 | 50mm x 10mm | 1386 | 1396 |
| 25mm x 6mm | 1382 | 1392 | 75mm x 10mm | 1387 | 1397 |
| 38mm x 6mm | 1383 | 1393 | 100mm x 15mm | 1388 | 1398 |
| 50mm x 6mm | 1384 | 1394 | | | |
|
3.3.4 Silicon maximum reflectivity mirrors
These mirrors have a reflectivity of more than 99.8% at 10.6µm for CO2 laser application.
|
|
Ordering information
|
| Size (dia. x thick) | Shape | | Size (dia x thick) | Shape | |
| Flat | Curve | | Flat | Curve |
| 25mm x 3mm | 1401 | 1411 | 50mm x 5mm | 1421 | 1431 |
| 38mm x 4mm | 1402 | 1412 | 50.8mm x 5mm | 1422 | 1432 |
| 38.1mm x 6.3mm | 1403 | 1413 | 76.2mm x 6.3mm | 1423 | 1433 |
|
|
|
