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F-Theta Scanning Lenses are commonly used in laser marking, engraving, and cutting systems. Used in conjunction with a galvanometer, beam expander, and Nd:YAG or CO2 laser source, F-theta lenses are designed to provide a flat field at the image plane of the scanning system.
Our Nd:YAG F-Theta Lenses feature multiple elements for the ultimate in image resolution. An air-spaced design and high efficiency AR coatings guarantee excellent throughput and durability. An industry-standard M85 threading on all F-theta lenses allows for easy mounting and simple retrofitting of OEM systems.
Our Nd:YAG F-Theta Lenses feature pulsed laser damage thresholds up to 5J/cm2 @10ns, or 1MW/cm2 (CW).
For diffraction-limited focusing performance at the image plane, the entire entrance pupil of the F-Theta lens should be utilized. Our 3X and 5X TECHSPEC® Fixed Power Laser Beam Expanders are ideal complements to our F-Theta lenses.
| Stock No. | Dimensions |
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| Diameter (mm) | Length (mm) | L2 (mm) | ΔM (mm) | A1 (mm) | A2 (mm) | D1 (mm) | D2 (mm) | |
| #59-959 | 90 | 49.5 | 41 | 20 | 7.54 | 15 | 34 | 50 |
| #59-960 | 90 | 52.5 | 40.6 | 16 | 7.86 | 12 | 26 | 47 |
| #59-961 | 90 | 51 | 41 | 20 | 11.23 | 17 | 38 | 54 |
| #59-962 | 110 | 64 | 20 | 30 | 10.52 | 16 | 44 | 70 |
| #59-956 | 90 | 24 | 20 | 18 | 18.08 | 20 | 48 | 60 |
| #59-957 | 90 | 24 | 20 | 18 | 16.99 | 20 | 48 | 60 |
| #59-958 | 90 | 24 | 20 | 18 | 16.34 | 20 | 48 | 60 |
| #63-310 | 90 | 50 | 40 | 20 | 7.54 | 12 | 34 | 52 |
| #63-311 | 90 | 48 | 38 | 20 | 10.82 | 17 | 40 | 54 |
| #63-313 | 89.6 | 50.9 | 24 | 14 | 13.72 | 20 | 34 | 55 |
| #63-312 | 90 | 62.6 | 37 | 20 | 11.41 | 20 | 40 | 60 |
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| F-Theta Lens Theory Calculations - Maximum Beam Diameter | ||||||||
| Stock No. | Scan Angle | Mirror Separation |
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| 0.00 | 5.00 | 10.00 | 15.00 | 20.00 | 30.00 | 40.00 | ||
| #63-312 | Maximum | 6.00 | 1.34 | N/A | N/A | N/A | N/A | N/A |
| #63-313 | 6.00 | 1.34 | N/A | N/A | N/A | N/A | N/A | |
| #63-310 | 14.00 | 9.34 | 4.67 | 0.01 | N/A | N/A | N/A | |
| #63-311 | 14.00 | 9.34 | 4.67 | 0.01 | N/A | N/A | N/A | |
| #59-959 | 10.00 | 4.68 | N/A | N/A | N/A | N/A | N/A | |
| #59-960 | 10.00 | 5.12 | 0.25 | N/A | N/A | N/A | N/A | |
| #59-961 | 10.00 | 4.68 | N/A | N/A | N/A | N/A | N/A | |
| #59-962 | 10.00 | 4.68 | N/A | N/A | N/A | N/A | N/A | |
| #59-956 | 14.00 | 8.68 | 3.37 | N/A | N/A | N/A | N/A | |
| #59-957 | 14.00 | 8.68 | 3.37 | N/A | N/A | N/A | N/A | |
| #59-958 | 14.00 | 8.68 | 3.37 | N/A | N/A | N/A | N/A | |
| #63-312 | 5° | 6.00 | 5.56 | 5.13 | 4.69 | 4.25 | 3.38 | 2.51 |
| #63-313 | 6.00 | 5.56 | 5.13 | 4.69 | 4.25 | 3.38 | 2.51 | |
| #63-310 | 14.00 | 13.56 | 13.13 | 12.69 | 12.25 | 11.38 | 10.51 | |
| #63-311 | 14.00 | 13.56 | 13.13 | 12.69 | 12.25 | 11.38 | 10.51 | |
| #59-959 | 10.00 | 9.56 | 9.13 | 8.69 | 8.25 | 7.38 | 6.51 | |
| #59-960 | 10.00 | 9.56 | 9.13 | 8.69 | 8.25 | 7.38 | 6.51 | |
| #59-961 | 10.00 | 9.56 | 9.13 | 8.69 | 8.25 | 7.38 | 6.51 | |
| #59-962 | 10.00 | 9.56 | 9.13 | 8.69 | 8.25 | 7.38 | 6.51 | |
| #59-956 | 14.00 | 13.56 | 13.13 | 12.69 | 12.25 | 11.38 | 10.51 | |
| #59-957 | 14.00 | 13.56 | 13.13 | 12.69 | 12.25 | 11.38 | 10.51 | |
| #59-958 | 14.00 | 13.56 | 13.13 | 12.69 | 12.25 | 11.38 | 10.51 | |
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