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F-Theta Lenses
F-Theta Lenses
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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

 

 

Telecentric F-Theta Lenses

Non-telecentric F-Theta Lenses

Advantage

• The shape of the central spot is 

consistent with that of the edge spot

• Small distortion of the spot

• Lower cost

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

F-Theta Lenses Model Number:FT-a-b-c 

Wavelength

(a)

Focal Distance

(b)

Scan Field

(c)

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)

...

  

 

Typical Specifications

Material

Max Input Beam

Scan Field

Wd

M1/M2

UVFS

6 mm

63x63 mm2

151.5 mm

13/35.5

UVFS

7 mm

99x99 mm2

194.43 mm

13/23

UVFS

10 mm

158x158 mm2

319.7 mm

13/28

 

 

Housing dimensions(mm):

63

 

107

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