Single-element F-theta Lens for CO2 Laser

  • Update:May 21, 2018
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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

1) STSL Series Lenses

STSL scanner lenses specially designed and optimized for use in CO2 laser 2-axis galvo-scanner systems with full beam diameters of up to15.0mm.  Mirror sets appropriate for use with beam diameters up to15mmrequire an increase in mirror separation in comparison with smaller mirrors. These changed optical conditions are catered for by the STSL series. These single-element lenses are designed to represent the best achievable compromise for on-axis and off-axis aberrations, field flatness and F-theta characteristics, obtainable using single-element spherical-surface designs of (standard)48mmdiameter. The lens materials is ZnSe.

Part no. Focal length (mm) Field size (mm) Back focal length (mm) Flange focal length (mm) Average spot diameter (um)
STSL-10.6-50-75 75.2 50 x 50 74.2 78.4 171
STSL-10.6-60-90 90.1 60 x 60 90.0 94.8 174
STSL-10.6-70-101 101.3 70 x 70 101.4 106.1 181
STSL-10.6-105-149 149.1 105 x 105 150.6 155.6 219
STSL-10.6-120-175 175.0 120 x 120 177.4 178.4 243
STSL-10.6-125-179 179.2 125 x 125 181.9 187.3 247
STSL-10.6-140-201 200.6 140 x 140 203.5 208.8 269
STSL-10.6-155-226 225.5 155 x 155 228.0 232.8 296
STSL-10.6-175-249 249.4 175 x 175 253.3 258.5 320
STSL-10.6-210-298 298.0 210 x 210 302.6 307.7 373
STSL-10.6-250-363 362.6 250 x 250 368.2 373.2 445
STSL-10.6-280-394 394.4 280 x 280 401.4 406.7 481
STSL-10.6-300-433 432.7 300 x 300 441.0 446.2 525
STSL-10.6-340-482 481.8 340 x 340 490.2 495.3 581
STSL-10.6-370-529 528.8 370 x 370 538.5 543.5 634
STSL-10.6-415-592 591.7 415 x 415 586.5 589.9 717
STSL-10.6-500-717 716.5 500 x 500 730.0 734.7 850
STSL-10.6-550-782 781.6 550 x 550 797.7 802.2 925
STSL-10.6-600-848 848.4 600 x 600 859.6 863.7 1000
STSL-10.6-680-978 977.6 680 x 680 993.7 997.9 1150
STSL-10.6-840-1183 1183 840 x 840 1205 1208 1390
STSL-10.6-850-1201 1201 850 x 850 1216 1220 1410
STSL-10.6-920-1285 1285 920 x 920 1317 1321 1520
STSL-10.6-1000-1409 1409 1000 x 1000 1421 1425 1650
STSL-10.6-1120-1577 1577 1120 x 1120 1593 1596 1840
STSL-10.6-1256-1746 1746 1256 x 1256 1783 1787 2040
STSL-10.6-1500-2122 2122 1500 x 1500 2173 2177 2420

Remark:

(1) The lenses are meniscus form; one concave and one convex surface. The concave always faces the incident beam.

(2)The mirror locations are the same for every STSL lens, so any lens can replace any other in the cell and be correctly positioned. The field sizes given, assume an optical field angle of +/-20deg.

(3) Focused spot diameters assume a 15mm diameter full beam (approximately 12mm 1/e2) and TEM00mode (M2= 1). The ‘average’ is the mean of 25 field positions in a quadrant.

(4) For all STSL lenses, the diameter is 48.0 +0/-0.1 mm, and the edge thickness is 3.0 +/-0.1 mm.

2) STXH Series  Lenses

Part No. Scan field (mm) Focal length (mm) Max Input Angle(°)
STXH-10.6-50-75 50×50 75 20
STXH-10.6-70-100 70×70 100 25
STXH-10.6-110-150 110×110 150 25
STXH-10.6-140-230 140×140 230 25
STXH-10.6-175-250 175×175 250 25
STXH-10.6-210-300 210×210 300 30
STXH-10.6-250-360 250×250 360 30
STXH-10.6-300-430 300×300 430 30
STXH-10.6-400-565 400×400 565 30
STXH-10.6-500-650 500×500 650 30
STXH-10.6-600-800 600×600 800 30

Remark: For all STSL lenses, the diameter is 48.0 +0/-0.1 mm, allowed maximum input beam diameter is 14mm, and the lens materials is ZnSe.

For the above lenses, we can provide a mount as option as follows:  

Part No. FL (mm) SA (±°) SL (mm) SAR (mm x mm) MI (mm) AS (mm) Length (mm) MO (mm) MT WD (mm)
STS-9068/181 68.00 25.00 59.00 41x41 8.00 17.26 47.00 90.00 M85x1 42.00
STS-9100/181 100.00 25.00 87.00 61x61 10.00 15.67 47.00 90.00 M85x1 65.00
STS-9163/181 153.00 25.00 133.00 94x94 12.00 15.97 47.00 90.00 M85x1 150.00
STS-9254/181 254.00 25.00 221.00 156x156 12.00 17.26 47.00 90.00 M85x1 230.00

Remark: FL=focal length; SA=scan angle; SL=scan length; SAR=scan area; MI=max. input beam diameter; AS=aperture stop; MO=max. outside diameter; MT=mounting thread; WD=working distance; PW=protective windows.

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