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Beam
Expanders
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(Reference: Basics of Beam Expander) |
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The most common type of beam expander is
derived from the Galilean telescope which usually has one negative input
lens and one positive output lens. The input lens presents a virtual
beam focus at the output. For low expansion ratios (1.3-20 times) the
Galilean telescope is most often employed due to its simplicity, small
package size and low cost. |
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* Material: BK7 fine
annealed
* Diameter: -0.1mm
* Thickness: ±0.1mm
* Flatness: l/4
* Surface Quality: 60-40 scratch-dig
* Coating: HR dielectric coatings
R > 99%
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1. BEST Series CO2
Laser Beam Expanders (10.6um) |
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1) BEST Series CO2 Laser
Beam Expanders |
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The spacing between the two
lenses inside the beam expander is fixed. |
|
Model |
Type |
Expansion
ratio (times) |
L (mm) |
D
(mm) |
Input clear
aperture (mm) |
Output clear
aperture ( mm ) |
Connection
(mm) |
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BEST-10.6-1.5 |
A |
1.5 |
27 |
20 |
7 |
10.5 |
f20 |
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BEST-10.6-1.5M |
A |
1.5 |
27 |
25 |
7 |
10.5 |
f25,
M22x0.75 |
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BEST-10.6-02M |
A |
2 |
39 |
25 |
7 |
14 |
f25,
M22x0.75 |
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BEST-10.6-2.5 |
A |
2.5 |
53 |
25 |
6.5 |
16.3 |
f25 |
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BEST-10.6-03 |
A |
3 |
67 |
25 |
5.5 |
16.5 |
f25 |
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BEST-10.6-03M |
A |
3 |
67 |
25 |
5.5 |
16.5 |
f25,
M22x0.75 |
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BEST-10.6-04 |
A |
4 |
93 |
31 |
5.5 |
22 |
f31 |
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BEST-10.6-04M |
A |
4 |
93 |
31 |
5.5 |
22 |
f31,
M22x0.75 |
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BEST-10.6-4.5 |
A |
4.5 |
106 |
33 |
5.5 |
25 |
f33 |
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BEST-10.6-05 |
A |
5 |
120 |
33 |
5 |
25 |
f33 |
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BEST-10.6-05M |
A |
5 |
120 |
33 |
5 |
25 |
f33,
M22x0.75 |
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BEST-10.6-5.5 |
A |
5.5 |
136 |
38 |
5 |
27.5 |
f38 |
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BEST-10.6-06 |
A |
6 |
147 |
40 |
5 |
30 |
f40 |
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BEST-10.6-07 |
A |
7 |
175 |
46 |
5 |
35 |
f46 |
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BEST-10.6-08 |
A |
8 |
206 |
50 |
5 |
40 |
f50 |
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2) BEST-xxxx-yyT Series Adjustable Beam
Expanders
These
beam expanders are
designed specially for large divergent laser beam.
Changing
the distance between two lenses inside the beam expander can
decrease the beam divergence to obtain better collimation of the
laser beam. If they are used for large-divergence laser beam,
you may turn the inner body to increase the spacing of two lenses
and then to obtain better collimation laser beam. |
Model |
Type |
Expansion
ratio (times) |
L（mm） |
D（mm） |
L2（mm） |
Input clear
aperture (mm) |
Output clear
aperture
( mm ) |
Connection(mm) |
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BEST-10.6-1.5T |
B |
1.5 |
27 |
20 |
17 |
7 |
10.5 |
f20 |
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BEST-10.6-02T |
B |
2 |
39.5 |
26 |
33 |
7 |
14 |
f26 |
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BEST-10.6-2.5T |
B |
2.5 |
53 |
26 |
45 |
6.5 |
16.3 |
f26 |
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BEST-10.6-03T |
B |
3 |
67 |
26 |
54 |
5.5 |
16.5 |
f26 |
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BEST-10.6-3.5T |
B |
3.5 |
80 |
30 |
66 |
5.5 |
19.3 |
f30 |
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BEST-10.6-04T |
B |
4 |
93.5 |
33 |
78 |
5.5 |
22 |
f33 |
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BEST-10.6-4.5T |
B |
4.5 |
106 |
34 |
84 |
5.5 |
25 |
f34 |
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BEST-10.6-05T |
B |
5 |
120 |
35 |
88 |
5 |
25 |
f35 |
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BEST-10.6-5.5T |
B |
5.5 |
136 |
38 |
98 |
5 |
27.5 |
f38 |
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BEST-10.6-06T |
B |
6 |
146.5 |
40 |
108 |
5 |
30 |
f40 |
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BEST-10.6-07T |
B |
7 |
175 |
46 |
135 |
5 |
35 |
f46 |
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BEST-10.6-08T |
B |
8 |
205 |
50 |
150 |
5 |
40 |
f50 |
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2. BEST Series Nd:YAG
Laser Beam Expanders (1064nm and 532nm) |
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Model
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Wave
length(nm)
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Expansion
ratio (times)
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Input
clear aperture (mm)
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Output
clear aperture (mm)
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Out
diameter
(mm)
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length
(mm)
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connection
(mm)
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BEST-1064-2.5
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1064
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2.5
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15
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28
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36
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60
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f36
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BEST-1064-3
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1064
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3
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15
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32
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42
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77
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f32
or f32
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BEST-1064-3-2
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1064
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