Multi-element F-theta Lens for CO2 Laser

  • Update:Mar 05, 2017
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F-theta lenses are used in laser scanners (laser markers) and the laser wavelengths may be 355/266/532/1064nm, 10.6um and other wavelengths. We can provide full range of f-theta lenses.

Product Introduction
Mounted 2-element Scan Lenses
Model WD mm Scan area (mm) Spot size (centre) µm Spot size (off axis) µm EP (mm) Scan angle (º) FD mm
Rectangular Round
STC-10.6-40 95 36×36 51 115 135 11 20 27
STC-10.6-80 118 80×80 113 120 140 11 27 16
STC-10.6-110 145 110×110 156 210 225 16 30 17
STC-10.6-125 188 125×125 177 235 285 16 30 17
STC-10.6-175 257 175×175 247 245 300 16 30 18
STC-10.6-200 294 200×200 283 320 365 16 30 19
STC-10.6-250 360 250×250 354 330 375 16 30 20
STC-10.6-300 433 300×300 424 385 430 16 30 20
STC-10.6-350 502 350×350 495 400 450 16 30 20
STC-10.6-400 569 400×400 566 420 485 16 30 20
STC-10.6-500 803 500×500 718 460 520 16 30 21
STC-10.6-700 960 700×700 990 530 680 16 30 21

Material: All elements and protection window made from Laser Grade ZnSe.
Mount details: See Figure 10.51.
Beam diameter: Up to 15mm (12mm 1/e2)
Optical scan field: +/-20° in X and Y.
Focal length: Within 1%.
Absorption: < 0.25% per element.
Transmission: > 99.6% per element coated AR/AR for 10.6mm.
Damage threshold: CW 3000W/mm at 10.6mm.

Part no Field size (mm sq) Focal length (mm) Average focused spot dia (mm) Standard deviation of spot dia (mm) WD no window(mm)
WD with window(mm)
Max. Fq error X axis(%) Max. Fq error Y axis(%)
STU2-10.6-50-75 50 75.0 118 25 60.27 62.03 -2.4 -2.4
STU2-10.6-70-100 70 100.0 139 22 87.57 89.34 -1.5 -1.4
STU2-10.6-105-151 105 151.4 171 0 149.06 150.84 0.9 0.9
STU2-10.6-140-200 140 200.0 225 0 213.94 215.73 1 1
STU2-10.6-175-250 175 250.0 282 0 261.36 263.17 1.3 1.3
STU2-10.6-210-300 210 300.0 338 0 312.06 313.87 1.5 1.5

Part No. EFL (mm) Scan Field (mm) Average Spot Size (um) Beam Dia. (mm) Mir. Sep. (mm) 2nd Mir. to Lens Mount (mm) Max. Input Angle (deg.) 90% CA (mm) Working Distance (mm)
SL2-10.6-35-60G 60 35X35 100 14 13 25 20 45 55
SL2-10.6-50-80G 80 50X50 118 14 13 25 20 45 76
SL2-10.6-70-122G 122 70X70 158 14 13 25 20 46 130
SL2-10.6-110-170G 170 110X110 170 14 13 25 20 54 185
SL2-10.6-140-220G 220 140X140 224 14 13 20 20 53 239
SL2-10.6-175-275G 250 175X175 239 14 13 25 20 51 305
SL2-10.6-210-300G 300 210X210 387 14 20 20 20 86 330
SL2-10.6-250-360G 360 250X250 465 14 20 20 20 86 393
SL2-10.6-300-420G 420 300X300 570 14 20 20 20 86 465
SL2-10.6-350-485G 485 350X350 822 14 20 30 20 87 528
SL2-10.6-F420G-20 420 300X300 505 20 30 30 20 78 470
SL2-10.6-110-150Z 150 110X110 170 14 13 27 20 64 159
SL2-10.6-140-200Z 200 140X140 224 14 13 27 20 69 215
SL2-10.6-175-250Z 250 175X175 239 14 13 27 20 78 270
SL2-10.6-F300Z-20 300 210X210 387 14 20 20 20 86 327
SL2-10.6-250-360Z 360 250X250 489 14 20 20 20 98 393
SL2-10.6-300-420Z 420 300X300 502 16 20 26 20 101 460
SL2-10.6-400-560Z 560 400X400 905 14 20 26 20 93 590
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