F-theta Scan Lens

F-theta Scan Lens


F-theta scan lens is also called flat field lens or the linear lens.The radial image height equals to focal length of the lens multiplied by the angle of the chief ray makes in the object space.While General focusing lenses deliver a focused spot to only one point,
They deliver a focused spot to many points on a scan field or workpiece.

Scan lens applications include:Marking;Engraving;Rapid prototyping;Drilling and Cutting .

 Capability

Common Specification
Material  ZnSe/GaAs
Diameter tolerance +0/- 0.10 mm
Thickness tolerance ± 0.10 mm
Focal length tolerances < ±0.5%
Clear Aperture >90%
Surface quality  S/D 40-20
Surface Flatness lambda/4 per 1inch
Centration <1 arc minute
Coating AR/AR Coating R<0.5% @10.6μm,T>90% @632.8nm
Part Numbe Material Scan Field
(mm)
EFL
(mm)
Diameter
 (mm)
Edge Thickness
 (mm)
BFL
(mm)
Diffraction
Limit
Spot
(μm)
Full
Beam
Diameter
(mm)
Max
input
Angel
(Deg)
SL1-10.6-50Z-25.4 ZnSe 12X12 50 25.4 2 50.8 53 12 10°
SL1-10.6-52Z-50 ZnSe 35X35 52 50 1.5 52.7 67 10 30°
SL1-10.6-75Z-48 ZnSe 50X50 75 48 3 75.9 97 19 28°
SL1-10.6-75Z-50 ZnSe 50X50 75 50 3 75.9 97 19 28°
SL1-10.6-100Z-40 ZnSe 60X60 100 40 3 100.9 129 10 25°
SL1-10.6-100Z-48 ZnSe 70X70 100 48 2.43 107.4 107.4 12 28°
SL1-10.6-120Z-45 ZnSe 75X75 120 45 3 124 154.6 10 25°
SL1-10.6-150Z-40 ZnSe 90X90 150 40 3.6 152.7 193.4 10 25°
SL1-10.6-150Z-48 ZnSe 110X110 150 48 3.14 145.5 161 12 29°
SL1-10.6-200Z-48 ZnSe 140X140 200 48 3 204.3 171 15 28°
SL1-10.6-250Z-48 ZnSe 175X175 250 48 3.2 256 214 15 28°
SL1-10.6-250Z-65 ZnSe 175X175 250 65 3.2 253.4 180 20 28°
SL1-10.6-300Z-48 ZnSe 210X210 300 48 3.88 308.6 322 12 28°
SL1-10.6-359Z-48 ZnSe 250X250 359.1 48 4 369.2 385 12 28°
SL1-10.6-433Z-48 ZnSe 300X300 433 48 3 444 463.5 12 28°
SL1-10.6-430Z-65 ZnSe 300X300 430 65 3.7 430 268 20 28°
SL1-10.6-420Z-70 ZnSe 300X300 420 70 3.5 430 268 20 28°
SL1-10.6-480Z-48 ZnSe 350X350 480 48 3.6 462 478 12 28°
SL1-10.6-480Z-70 ZnSe 350X350 480 70 3.9 496.3 305 20 28°
SL1-10.6-573Z-48 ZnSe 400X400 573 48 4.2 591 614 12 28°
SL1-10.6-573Z-70 ZnSe 400X400 573 70 3.9 591 364 20 28°
SL1-10.6-573Z-75 ZnSe 400X400 573 75 3.8 591 364 20 28°
SL1-10.6-620Z-70 ZnSe 450X450 620 70 3.9 636 396.4 20 28°
SL1-10.6-720Z-48 ZnSe 500X500 720.7 48 3 737.4 850 14 28°
SL1-10.6-720Z-75 ZnSe 500X500 720.65 75 2.65 741 454.6 20 28°
SL1-10.6-720Z-48 ZnSe 530X530 720.7 48 3 741 783 12 28°
SL1-10.6-742Z-88 ZnSe 530X530 741.9 88 4.18 759 476.3 20 28°
SL1-10.6-934Z-48 ZnSe 680X680 934 48 3.1 957.7 1000 12 28°
SL1-10.6-1191Z-48 ZnSe 750X750 1191.6 48 3 1220 1276 12 25°
SL1-10.6-2128Z-48 ZnSe 1380X1380 2127.9 48 3.5 2176 2283 12 25°
Part Number Material Scan
Field(mm)
EFL
(mm)
Diameter
 (mm)
Edge
Thickness
 (mm)
BFL
(mm)
Diffraction
Limit Spot
(μm)
Full Beam

Diameter (mm)
Max input
Angel
(Deg)
SL1-10.6-60G-55 GaAs 35X35 60 55 2.2 59 78 10 28°
SL1-10.6-80G-55 GaAs 50X50 79.7 55 1.9 78 154 12 17°
SL1-10.6-100G-55 GaAs 70X70 99.9 55 2.8 99.2 163.4 12 20°
SL1-10.6-172G-55 GaAs 110X110 172.5 55 3.1 174.4 206 12 18°
SL1-10.6-250G-55 GaAs 175X175 250 55 3.5 254 280 12 20°
SL1-10.6-420G-80 GaAs 300X300 420 80 4.3 427.8 335 20 20°