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GCO-310201 F-theta Lenses

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GCO-310201 F-theta Lenses

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476.9
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$
476.9
GCO-310201 F-theta Lenses
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GCO-31 F-theta Lenses

  

F-theta Lenses are plane field objectives, which are commonly used in combination with XY galvanometer scanner. Contrary to a normal lens which focuses a input collimated beam on a spherical image plane, a F-theta lens focuses on a flat image surface. At the same time, it maintains almost constant spot size over the entire field when the input beam scans with input angle θ. The position of the spot on the image plane is directly proportional to the scan angle, i.e. F-theta condition:

Daheng F-theta lens series (GCO-31) fulfils the F-theta condition better than 0.1%.

APPLICATION


For laser material processing, F-theta lenses guarantee the best processing result over the entire scan field. These lenses contribute to production lines, especially for sophisticated applications. The wide range of applications includes:

◆  Drilling and fine cutting of metals and ceramics

◆  Plastic welding

◆  Marking

◆  Cleaning for treatment or restoration

 

KEY PARAMETERS


◆  The overall scan angle,θmax, refers to the maximum diagonal scan angle.

◆  The entrance beam diameter, φbeam(1/e2), is the beam diameter where the optical intensity is 13.5% of the peak intensity of the laser beam.

◆  Factor of apodisation (FAP)is the ratio of the beam diameter, φbeam, and the entrance pupil,φaper , of the F-theta lens. FAP is used for calculation of the minimal possible focus spot size.

ΦaperΦbeam

FAP

2

1.27

1.5

1.41

1.25

1.56

1

1.83

0.9

1.99

0.75

2.32

0.5

2.44

◆  Diffraction value M2 refers to the ability of focusing laser light, defined by ISO11146 standards. It is the ratio of the divergence angle of a laser beam to the divergence angle of an ideal Gaussian beam. A Gaussian beam would provide the smallest possible focus spot size, which M2 value is 1. This value is also used for calculation of the minimal possible focus spot size.

◆  Spot size Φspot (1/e2) is the minimal possible focused spot size calculated as the wavelength of the laser multiplied with the focal length of F-theta lens, the FAP and the diffraction value M2, divided by the beam diameter Φbeam. 

 

 


 

GCO-31 F-theta Lenses

Part No.

EFL

Wavelength

Scan

Angle θ

Scan Area

(mm*mm)

Max. Input

Beam Diameter

Ø beam (mm)

      

EFL (mm)

WD (mm)

Spot Size

Ø spotμm

Outer

Diameter

Length

(mm)

Screw

GCO-310101

100

355nm

±25°

61.5*61.5

6

127.1

115.7

11

90

51

M85X1

GCO-310102

160

355nm

±25°

98.7*98.7

6

205

186.3

18

90

51

M85X1

GCO-310103

254

355nm

±25°

156.7*156.7

10

346.4

298.8

17

120

65.9

M85X1

GCO-310201

100

532nm

±25°

61.5*61.5

12

109.7

100.2

8

90

52.0

M85X1

GCO-310202

160

532nm

±25°

98.7*98.7

12

188.3

178.8

13

90

50.2

M85X1

GCO-310203

254

532nm

±25°

156.7*156.7

16

324.2

293.2

16

120

69.5

M85X1

GCO-310301

100

1064nm  

±25°

61.5*61.5

12

108.6

99.1

16

90

52.0

M85X1

GCO-310302

160

1064nm

±25°

98.7*98.7

12

188.2

178.7

26

90

50.2

M85X1

GCO-310303

254

1064nm

±25°

156.7*156.7

16

342.2

293.2

31

120

69.5

M85X1 

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