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F-Theta Lenses
- F-theta lenses are often used in laser marking, laser engraving and laser cutting systems where constant scan rate and linear displacement are required.
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Product description：
F-theta lenses are often used in laser marking, laser engraving and laser cutting systems where constant scan rate and linear displacement are required. F-theta lenses are designed with a barrel distortion, and resulting a displacement that is linear with scanning angle.
CASTECH provides telecentric and non-telecentric F-theta lenses with low distortion. We adopt quality materials, proprietary polishing and coating techniques, and standard interface thread to ensure high laser damage threshold and compatibility of our products.
Applications：
● Laser industrial processing
● Laser sensing system
● Ultrafast laser system
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Telecentric F-Theta Lenses |
Non-telecentric F-Theta Lenses |
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Advantage |
• The shape of the central spot is consistent with that of the edge spot • Small distortion of the spot |
• Lower cost |
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Disadvantage |
• Larger size • High cost |
• The magnification may varies with relative position •Large difference in spot size between center and edge |
Schematic diagram of F-theta lens
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F-Theta Lenses Model Number：FT-a-b-c |
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Wavelength (a) |
Focal Distance (b) |
Scan Field (c) |
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355 nm ... |
109 (109.4 mm) 160 (160 mm) 174 (174.1 mm) 225 (255 mm) ... |
63 (63×63 mm) 99 (99×99 mm) 107 (107×107 mm) 158 (158×158 mm) ... |
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Typical Specifications |
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Material |
Max Input Beam |
Scan Field |
Wd |
M1/M2 |
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UVFS |
6 mm |
63x63 mm2 |
151.5 mm |
13/35.5 |
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UVFS |
7 mm |
99x99 mm2 |
194.43 mm |
13/23 |
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UVFS |
10 mm |
158x158 mm2 |
319.7 mm |
13/28 |
Housing dimensions(mm)：
63
107
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F-Theta Lenses.pdf
Size:2021-11-26 16:11:02
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