| Beam
Expander |
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Beam Expander |
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A
beam expander is any optical system designed to
increase the diameter of a laser beam. In most
cases, the term is taken to mean a telescope
designed to take a small-diameter collimated
beam input beam and produce a larger diameter
collimated output beam, thus reducing the
divergence of the beam. The beam expander
consists of a negative input lens and a positive
objective. The expansion factor is the ratio of
the focal length of the two lenses. |
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Features
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Applications
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Precision
laser machining: capable to provide a high power
density focal spot.
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Laser
range finder: capable to provide a highly
collimated beam.
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Combining
with a spatial filter, able to modify laser
power distribution.
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■ BE Series Beam
Expander for Beam Size of
≤2mm Diameter |
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Note:
These series beam expander are offered for UV,
visible and infrared lasers respectively. Please
let me know which wavelength you want before
order. |
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■
Variable rate laser Beam
Expander |
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The
variable rate laser beam expander is mainly
composed of multiple sets of ultraviolet fused
silica (UVFS) lenses, which are integrated in a
mechanical housing in a Galilean structure. The
diameter of the laser beam can be continuously
adjusted from 2 times to 10 times. Optimized
design for the diffraction limits of single
wavelengths 355nm, 532nm, and 1064nm
respectively, with no internal focus and a
locking structure, it is widely used in optical
research, high-power laser processing and other
fields. |
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Features
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Ultraviolet fused silica
material, with optimized
diffraction limit design
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Galilean structure, no
internal focus
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It can achieve beam
expansion adjustment
from 2X to 10X, and the
divergence Angle
adjustment accuracy is
high
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Specifications |
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Working
wavelength |
355nm/532nm/1064 nm |
Rate of
adjustment |
2X-10X |
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element
material |
Uv fused
quartz |
Transmittance |
≥96% |
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Surface
finish |
40/20 |
Incident
light
aperture |
9.3 mm |
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Weight |
～0.25 kg |
Outgoing
light
aperture |
33.0 mm |
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Locking
method |
M3
rubber
head
screw |
Diffraction
limit:
The
maximum
diameter
of the
incident
beam |
2.2-6.0
mm
@355nm
3.0-8.0 mm @532nm
3.0-8.0 mm @1064nm |
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Length
of
mechanical
parts
(2X) |
155.1 mm
@355nm
156.2 mm @532nm
158.6 mm
@1064nm |
Mechanical
part
length
(10X) |
150.5 mm
@355nm
150.1 mm @532nm
153.5
mm
@1064nm |
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Membrane
layer
damage
threshold |
2.5 J/cm²;1.0MW/cm² @355nm
5.0
J/cm²;2.5MW/cm² @532nm
10 J/cm²;5MW/cm² @1064nm |
System
damage
threshold |
0.25
J/cm²;0.1MW/cm²
@355nm
0.5
J/cm²;0.25MW/cm²
@532nm
1.0
J/cm²;0.5MW/cm²
@1064nm |
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BE Series Beam
Expander Holder
