Zoom Beam Expanders

  • Update:May 26, 2020
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Variable beam expanders are ideal for systems in which different magnifications and precise control of laser beam divergence are required. We offer Galilean type variable beam expanders with high LIDT AR coatings that minimize ghost reflections. Our v

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We offer 3 types of beam expanders: fixed beam expanders, zoom beam expanders and motorised beam expanders at various wavelengths of  213nm, 266nm, 343-355nm, 405nm, 633nm, 515-545nm, 808-980nm, 1030-1090nm, 155nm, 1850-1980nm, 10.6um. Other wavelengths and custom-designed beam expanders are available upon request. For more information, please feel free to contact us.

We may use the following abbreviations in the tables: WL=wavelength, MAG=magnification, CA=clear aperture, CA1=input clear aperture, CA2=output clear aperture, D1=input diameter, D2=output diameter, L1=total length of beam expander, M1=connection or mounting thread, D=diameter.

BEST-E and BEST-F Series 1064/532/355/213nm Zoom Beam Expanders

Part number

WL, nm

MAG, x

CA1,mm

CA2,mm

OD(D2),mm

L1,mm

Connection, mm

BEST-1064-1-2E

1064

1-2

20

20

42

114

M30x1+M43x0.5_Φ46

BEST-1064-2-4E

1064

2-4

15

33

48

97.5

Φ42

BEST-1064-2-8F

1064

2-8

12

32

42

153

Φ37.6

BEST-532-2-4E

532

2-4

15

33

46

97.5

M30x1+M43x0.5_Φ46

BEST-532-2-8F

532

2-8

12

32

42

169

Φ37.6

BEST-355-2-4E

532

2-4

15

33

46

97.5

M30x1+M43x0.5_Φ46

BEST-355-2-8F

355

2-8

12

32

42

164

Φ37.6

BEST-213-2-8F

213

2-8

12

32

42

164

Φ37.6

BEAL Series 355/532/1064nm Zoom Beam Expanders

BEAL Series Motorized Zoom Beam Expanders

BEAL is a zoom beam expander designed for automated applications. It combines multiple lenses to provide variable magnification and automated pergence adjustment from 1x to 6x. Driver and all the motors are integrated in the casing of the beam expander which makes it compact and convenient for usage. High pointing stability (<0.1 mrad) and fast magnification speed (1 sec from 1x to 6x) offers suitable performance for precision and high speed industrial applications.

Features

Standard specifications:

Wavelength

343-355nm, 515-532nm, 1020-1070nm

Magnification factor

1 - 6 continuous

Pointing stability

<0.1mrad

Magnification speed (1x to 6x)

<1 sec

Diffraction limited maximum input beam diameter

6mm

Total transmission

>98%

Lens material

UVFS

LIDT (coating)

>10J/cm2 @ 1064nm, 10ns, 10Hz

Dimensions (H x W x L)

62 x 62 x 161 mm

Control interface

RS232

Housing material

Black anodized aluminum

Collimator hole

Yes

BEAL Series Zoom Beam Expanders

Zoom beam expanders are ideal for systems in which different magnifications and precise control of laser beam pergence are required. We offer Galilean type zoom beam expanders with high LIDT AR coatings that minimize ghost reflections. Our zoom beam expanders allows to separately adjust magnification and pergence. Two main standard products change magnification in the range of 1x-4x and 2x-8x.

Features

Wavelength, nm

Expansion range

Max input beam diameter*, mm

Housing dimensions, mm

Product ID

343-355

1x-4x

1X

2X

3X

4X

4.0

5.5

3.0

3.0

Ø41 x 120

BEAL-1X-4X-0343-0355-B

2x-8x

2X

3X

4X

5X

6X

7X

8X

5.0

5.0

4.0

3.0

2.5

2.25

2.0

Ø41 x 145

BEAL-2X-8X-0343-0355-B

450 1x-4x

1X

2X

3X

4X

4.0

5.5

3.0

3.0

Ø41 x 120 BEAL-1X-4X-0450-B

515-532

1x-4x

1X

2X

3X

4X

4.5

6.5

4.0

3.5

Ø41 x 120

BEAL-1X-4X-0515-0532-B

2x-8x

2X

3X

4X

5X

6X

7X

8X

5.0

5.0

4.0

3.0

2.5

2.25

2.0

Ø41 x 147.5

BEAL-2X-8X-0515-0532-B

1030-1064

1x-4x

1X

2X

3X

4X

4.5

7.0

5.0

4.0

Ø41 x 120

BEAL-1X-4X-1030-1064-B

2x-8x

2X

3X

4X

5X

6X

7X

8X

5.0

5.0

5.0

4.0

3.0

2.5

2.5

Ø41 x 147.5

BEAL-2X-8X-1030-1064-B

* Max input beam diameter ensuring diffraction limited performance.

YAG Laser Zoom Beam Expanders (266nm, 355nm, 532nm, 1064nm)

1. STS Series YAG Laser Zoom Beam Expanders (266/355/532/1064nm)

Our zoom beam expanders (or called as variable beam expander) are highly corrected 4-lens element systems. The version with pergence adjustment is very user friendly, as the magnification setting and the pergence setting are independent from each other, i.e. the pergence remains unchanged while changing the expansion factor. In addition, the total length of the beam expanders remain constant during zooming and/or pergence setting. For remote controlled setting, we developed motorized versions of our zoom beam expanders. A motor adapter can be incorporated to drive the mechanics used for magnification setting.

Part  umber Λ [nm] magnification material clear-Ø [mm] max. exit-Ø [mm] max.outside
Ø [mm]
Length
[mm]
thread motor
STS-EZM5075/199 266 1.0 - 8.0 fs 10 30 58 162 C-mount zoom motorised
STS-EXZ5075/199 266 1.0 - 8.0 fs 10.5 31 58 162 C-mount not motorised
STS-EXZ3976/199 266 1.0 - 8.0 fs 9 30 160.0 x 70.5 200.4 --- zoom motorised
STS-EXZ5311/574 343 - 355 1.0 - 3.0 fs 10.5 20 47 85.2 M30x1 not motorised
STS-EZM5311/574 343 - 355 1.0 - 3.0 fs 10.5 20 47 85.2 M30x1 zoom motorised
STS-EZM5310/574 343 - 355 1.0 - 3.0 fs 10.5 20 47 105.8 C-mount zoom motorised
STS-EXZ5310/574 343 - 355 1.0 - 3.0 fs 10.5 20 47 85.2 C-mount not motorised
STS-EXZ5075/574 343 - 355 1.0 - 8.0 fs 10.5 31 58 162 C-mount not motorised
STS-EZM5075/574 343 - 355 1.0 - 8.0 fs 10 30 58 162 C-mount zoom motorised
STS-EXZ3976/574 343 - 355 1.0 - 8.0 fs 9 30 160.0 x 70.5 200.4 --- zoom motorised
STS-EXZ5310/075 355 1.0 - 3.0 fs 10.5 20 47 85.2 C-mount not motorised
STS-EZM5311/075 355 1.0 - 3.0 fs 10.5 20 47 85.2 M30x1 zoom motorised
STS-EZM5310/075 355 1.0 - 3.0 fs 10.5 20 47 105.8 C-mount zoom motorised
STS-EXZ5311/075 355 1.0 - 3.0 fs 10.5 20 47 85.2 M30x1 not motorised
STS-EZM5075/075 355 1.0 - 8.0 fs 10 30 58 162 C-mount zoom motorised
STS-EXZ5075/075 355 1.0 - 8.0 fs 10.5 31 58 162 C-mount not motorised
STS-EXZ3976/075 355 1.0 - 8.0 fs 9 30 160.0 x 70.5 200.4 --- zoom motorised
STS-EZM5311/292 515 - 545 1.0 - 3.0 fs 10.5 20 47 85.2 M30x1 zoom motorised
STS-EZM5310/292 515 - 545 1.0 - 3.0 fs 10.5 20 47 85.2 C-mount zoom motorised
STS-EXZ5310/292 515 - 545 1.0 - 3.0 fs 10.5 20 47 105.8 C-mount not motorised
STS-EXZ5311/292 515 - 545 1.0 - 3.0 fs 10.5 20 47 85.2 M30x1 not motorised
STS-EZM5076/292 515 - 545 1.0 - 8.0 fs 10 30 58 162 C-mount zoom motorised
STS-EXZ5076/292 515 - 545 1.0 - 8.0 fs 10 30 58 162 C-mount not motorised
STS-EXZ3976/292 515 - 545 1.0 - 8.0 fs 9 30 160.0 x 70.5 200.4 --- zoom motorised
STS-EXZ5312/292 515 - 545 1.2 - 3.0 fs 18.5 43 80 230.2 M30x1 not motorised
STS-EZM5310/328 1030 - 1090 1.0 - 3.0 fs 10.5 20 47 105.8 C-mount zoom motorised
STS-EXZ5310/328 1030 - 1090 1.0 - 3.0 fs 10.5 20 47 85.2 C-mount not motorised
STS-EZM5311/328 1030 - 1090 1.0 - 3.0 fs 10.5 20 47 85.2 M30x1 zoom motorised
STS-EXZ5311/328 1030 - 1090 1.0 - 3.0 fs 10.5 20 47 85.2 M30x1 not motorised
STS-EZM5076/328 1030 - 1090 1.0 - 8.0 fs 10 30 58 162 C-mount zoom motorised
STS-EXZ5076/328 1030 - 1090 1.0 - 8.0 fs 10 30 58 162.6 C-mount not motorised
STS-EXZ3976/328 1030 - 1090 1.0 - 8.0 fs 9 30 160.0 x 70.5 200.4 --- zoom motorised
STS-EXZ5312/328 1030 - 1090 1.2 - 3.0 fs 18.5 43 80 230.2 M30x1 not motorised
STS-EXZ5310/008 1550 1.0 - 3.0 fs 10.5 20 47 85.2 C-mount not motorised
STS-EXZ5311/008 1550 1.0 - 3.0 fs 10.5 20 47 85.2 M30x1 not motorised
STS-EXZ5310/159 1850 - 1980 1.0 - 3.0 fs 10.5 20 47 85.2 C-mount not motorised

2. BEST-W Series YAG Laser Zoom Beam Expanders (266/355/532/1064nm)

We are proud to present our new product. It is specially designed to cater for the various variable magnification of 2x up to 8x. It consists of adjustable pergence. These beam expanders are primarily intended for Nd:YAG, Green & UV lasers. They offer diffraction-limited performance at 1064nm wavelength.

Part No.

Magnification

Input CA (mm)

Output CA (mm)

Length (mm)

Remark

BEST-1064-1-3X-W

1x-3x

10

20

85.0

 

BEST-1064-1-3X-AW

1x-3x

20

38

118.0

 

BEST-1064-2-8X-W

2x-8x

10

30

142-149

 

BEST-1064-2-8X-QW

2x-8x

12

32

195

 

BEST-1064-2-8X-AW

2x-8x

13

60.67

162-169

 

BEST-800-2-8X-W

2x-8x

10

30

142-149

 

BEST-532-1-3X-W

1x-3x

10

20

85.0

 

BEST-532-2-8X-W

2x-8x

10

30

131.1

 

BEST-532-2-8X-A-W

2x-8x

11

60

190

 

BEST-355-1-8X-W

1x-8x

10

30

85-200

 

BEST-355-2-8X-W

2x-8x

10

30

142-149

 
BEST-355-1-8X-MOT-W 1X-8X 12 32 188 motorised

BEST-355-2-8X-A-W

2x-8x

11

60

183-192

 

BEST-266-1-8X-W

1x-8x

10

30

162-200

 

STS Series 1550nm Zoom Beam Expanders

The material is fused silica.

Model

MAG

CA1(mm)

CA2 (mm)

D2(mm)

L1(mm)

Thread

Motorised

STS-EXZ5310/008

1.0 - 3.0

10.5

20

47

85.2

C-mount

not motorised

STS-EXZ5311/008

1.0 - 3.0

10.5

20

47

85.2

M30x1

not motorised

STS Series 1850-1980nm Zoom Beam Expanders

The material is fused silica

Model

WL(nm)

MAG

CA1(mm)

CA2(mm)

D2(mm)

L1(mm)

Thread

Motorised

STS-EXZ5310/159

1850 - 1980

1.0 - 3.0

10.5

20

47

85.2

C-mount

not motorised

STS-EXZ5311/159

1850 - 1980

1.0 - 3.0

10.5

20

47

82.5

M30x1

not motorised

BEST-W Series 9.4um & 10.6um CO2 Laser Zoom Beam Expanders

Part No.

Magnification

Input CA (mm)

Output CA (mm)

Length (mm)

BEST-10.6-1-4X-W

1X-4X

18

48

135

BEST-10.6-2-6X-W

2X-6X

16

96

205.78-212.37

BEST-9.4-2-8X-W

2X-8X

10

36

168-172

BEST-10.6-2-8X-W

2X-8X

10

36

168-172

STJ Series Zoom Beam Expanders

(1)  STJ Series of Zoom Beam Expander 1x-8x High Power Systems

Entrance elements

Fused silica

Exit elements

Fused silica

Transmission

≥97%

Beam pointing stability

<0.3mrad

Mounting

55mm or mounting thread M30x1mm

Weight

0.54kg

Magnification

Expansion scale

Focusing scale

1x

10.3mm

0.0mm

8x

0.0mm

19.9mm

 

 

1030-1080nm

515-540nm

355nm

GDD 1):

339fs²

1580fs²

2810fs²

LIDT coating pulsed; CW 2):

5.0 J/cm² * (τ/[ns]) ^ 0.30;

5.0 MW/cm²

2.5 J/cm² * (τ/[ns]) ^ 0.30;

2.5 MW/cm²

1.0 J/cm² * (τ/[ns]) ^ 0.40;

1.0 MW/cm² 4)

LIDT system pulsed; CW 2):

0.35 J/cm² * (τ/[ns]) ^ 0.30;

0.35 MW/cm²

0.20 J/cm² * (τ/[ns]) ^ 0.30;

0.20 MW/cm²

0.10 J/cm² * (τ/[ns]) ^ 0.40;

0.10 MW/cm² 4)

 

 

Entrance pupil  Ø 3)

Model:

STJ-606997

STJ-627443

STJ-586117

Zoom factor

1030-1080nm

515-540nm

355nm

1x

9.0mm

9.0mm

9.0mm

2x

9.0mm

9.0mm

9.0mm

3x

9.0mm

9.0mm

9.0mm

4x

7.5mm

7.5mm

7.5mm

5x

6.0mm

6.0mm

6.0mm

6x

5.0mm

5.0mm

5.0mm

7x

4.5mm

4.5mm

4.5mm

8x

4.0mm

4.0mm

4.0mm

Group delay dispersion , 2) See technical note; 3) Recommended maximum diameter of entrance pupil; 4) For UV lasers, the LIDT values are valid for pulse durations > 10 ps. For shorter pulses please be advised to test.

Note: Fine adjustment of the zooming and focusing scale by the combination of mm scales and vernier scales.

(2)  STJ Series of Zoom Beam Expander 2x-10x Large Magnification Range

Entrance elements

Fused silica

Exit elements

Highly laser-resistant materials (532nm and 1030-1080nm) or fused silica (355 nm)

Transmission

≥96%

Mounting

Ø: 37.6 (0/-0.1) mm

Weight

0.23kg

Magnification

Expansion scale

Focusing scale

2x

0.0mm

0.0mm

10x

9.7mm

7.1mm

 

 

1030-1080nm

515-540nm

355nm

GDD 1):

288 fs²

1070 fs²

1640 fs²

LIDT coating pulsed; CW 2):

5.0 J/cm² * (τ/[ns]) ^ 0.30;

5.0 MW/cm²

2.5 J/cm² * (τ/[ns]) ^ 0.35;

2.5 MW/cm²

1.0 J/cm² * (τ/[ns]) ^ 0.40;

1.0 MW/cm² 4)

LIDT system pulsed; CW 2):

0.5 J/cm² * (τ/[ns]) ^ 0.30;

0.5 MW/cm²

0.25 J/cm² * (τ/[ns]) ^ 0.35;

0.25 MW/cm²

0.10 J/cm² * (τ/[ns]) ^ 0.40;

0.10 MW/cm² 4)

 

 

Entrance pupil  Ø 3)

Model:

STJ-017052-001-26

STJ-017052-201-26

STJ-017052-401-26

Zoom factor

1030-1080nm

515-540nm

355nm

2x

8.0mm

8.0mm

6.0mm

3x

8.0mm

7.0mm

6.0mm

4x

7.0mm

6.0mm

5.0mm

5x

6.0mm

5.0mm

4.5mm

6x

5.0mm

4.0mm

4.0mm

7x

4.0mm

4.0mm

3.5mm

8x

3.5mm

3.5mm

3.0mm

9x

3.2mm

3.2mm

2.7mm

10x

3.0mm

3.0mm

2.2mm

1) Group delay dispersion , 2) See technical note; 3) Recommended maximum diameter of entrance pupil; 4) For UV lasers, the LIDT values are valid for pulse durations > 10 ps. For shorter pulses please be advised to test.

Note: Fine adjustment of the zooming and focusing scale by the combination of mm scales and vernier scales.

(3)  STJ Series of Zoom Beam Expander 1x-4x Fused Silica Systems

Entrance elements

Fused silica

Exit elements

Fused silica

Transmission

≥97%

Mounting

D37.6mm or mounting thread 30x1mm

Weight

0.19kg

Magnification

Expansion scale

Focusing scale

1x

0.0mm

0.0mm

4x

7.4mm

13.3mm

 

 

1030-1080nm

515-540nm

355nm

GDD 1):

134fs²

547fs²

972fs²

LIDT coating pulsed; CW 2):

5.0 J/cm² * (τ/[ns]) ^ 0.30;

5.0 MW/cm²

2.5 J/cm² * (τ/[ns]) ^ 0.35;

2.5 MW/cm²

1.0 J/cm² * (τ/[ns]) ^ 0.40;

1.0 MW/cm² 4)

LIDT system pulsed; CW 2):

1.00 J/cm² * (τ/[ns]) ^ 0.30;

1.00 MW/cm²

0.50 J/cm² * (τ/[ns]) ^ 0.35;

0.50 MW/cm²

0.20 J/cm² * (τ/[ns]) ^ 0.40;

0.20 MW/cm² 4)

 

 

Entrance pupil  Ø 3)

Model:

STJ-017052-012-26

STJ-017052-202-26

STJ-017052-402-26

Zoom factor

1030-1080nm

515-540nm

355nm

1x

4.0mm

4.0mm

4.0mm

2x

4.0mm

4.0mm

4.0mm

3x

4.0mm

4.0mm

4.0mm

4x

4.0mm

4.0mm

4.0mm

Group delay dispersion , 2) See technical note; 3) Recommended maximum diameter of entrance pupil..

Note: Fine adjustment of the zooming and focusing scale by the combination of mm scales and vernier scales.

(4)  STJ Series of Zoom Beam Expander 1x-4x Steadfast Very Robust Fused Silica Systems

Entrance elements

Fused silica

Exit elements

Fused silica

Transmission

≥97%

Mounting

D45mm or mounting thread 30x1mm at both entrance and exit

Weight

0.37kg

Magnification

Expansion scale

Focusing scale

1x

14.8mm

0.0mm

4x

0.0mm

26.5mm

 

 

1030-1080nm

515-540nm

355nm

GDD 1):

134fs²

547fs²

972fs²

LIDT coating pulsed; CW 2):

5.0 J/cm² * (τ/[ns]) ^ 0.30;

5.0 MW/cm²

2.5 J/cm² * (τ/[ns]) ^ 0.35;

2.5 MW/cm²

1.0 J/cm² * (τ/[ns]) ^ 0.40;

1.0 MW/cm² 4)

LIDT system pulsed; CW 2):

1.00 J/cm² * (τ/[ns]) ^ 0.30;

1.00 MW/cm²

0.50 J/cm² * (τ/[ns]) ^ 0.35;

0.50 MW/cm²

0.20 J/cm² * (τ/[ns]) ^ 0.40;

0.20 MW/cm² 4)

 

 

Entrance pupil  Ø 3)

Model:

STJ-582823

STJ-593355

STJ-593354

Zoom factor

1030-1080nm

515-540nm

355nm

1x

4.0mm

4.0mm

4.0mm

2x

4.0mm

4.0mm

4.0mm

3x

4.0mm

4.0mm

4.0mm

4x

4.0mm

4.0mm

4.0mm

1) Group delay dispersion , 2) See technical note; 3) Recommended maximum diameter of entrance pupil.

Note: Fine adjustment of the zooming and focusing scale by the combination of mm scales and vernier scales.

 CO2 Laser Beam Expander, YAG Laser Beam ExpanderBeam Expander at Various WavelengthsBasics of Beam Expander

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