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Beam Expander

Laser components & accessories

Beam Expander

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. The variable rate laser beam expander is mainly composed of multiple sets of ultraviolet fused silica (UVFS) lenses, which are integrated in a mechani

FeaturesApplications
Low power loss Good output collimation Able to withstand laser power of more than 1000 W Adjustable divergence angle of 18 to 32 mrad with the variable beam expandersPrecision laser machining: capable to provide a high power density focal spot. Laser range finder: capable to provide a highly collimated beam. Combining with a spatial filter, able to modify laser power distribution.
Specifications Part No.Expansion ratioDimensions (mm)
For model III & FFor model FN
BE-2x2XØ25*50.5
BE-3x3XØ42*84.8Ø42*87.8
BE-4x4x
BE-5x5X
BE-8x8xØ56*147.8Ø56*150.8
BE-10x10X
BE-15x15xØ56*192.8Ø56*195.8
BES-01BES-02
Dimensions: 75 (L) Ø50 (W) Ø101 (H) mm 3Dimensions: 75 (L) Ø50 (W) Ø119 (H) mm 3
Part No.Expansion ratioDimensions (mm)
BEW-2x2XØ29*51
BEW-3x3XØ42*87.8
BEW-5x5XØ45*123.8
BEW-10x10XØ84*209
Working wavelength355nm/532nm/1064 nmRate of adjustment2X-10X
element materialUv fused quartzTransmittanceØ96%
Surface finish40/20Incident light aperture9.3 mm
WeightØ0.25 kgOutgoing light aperture33.0 mm
Locking methodM3 rubber head screwDiffraction limit: The maximum diameter of the incident beam2.2-6.0 mm @355nm Ø 3.0-8.0 mm @532nm Ø 3.0-8.0 mm @1064nm
Length of mechanical parts (2X)155.1 mm @355nm Ø 156.2 mm @532nm Ø 158.6 mm @1064nmMechanical part length (10X)150.5 mm @355nm Ø 150.1 mm @532nm Ø 153.5 mm @1064nm
Membrane layer damage threshold2.5 J/cm²;1.0MW/cm² @355nm Ø 5.0 J/cm²;2.5MW/cm² @532nm Ø 10 J/cm²;5MW/cm² @1064nmSystem damage threshold0.25 J/cm²;0.1MW/cm² @355nm Ø 0.5 J/cm²;0.25MW/cm² @532nm Ø 1.0 J/cm²;0.5MW/cm² @1064nm

Application context

Why this design is used

Application fit depends on the ordered configuration; catalog values are separated from fields that still require confirmation.

Laboratory optical integration

Beam Expander: The component is selected by matching its interfaces and error contribution to the complete instrument budget.

Research instrument development

Beam Expander: A documented configuration prevents optical, mechanical and control assumptions from becoming integration failures.

Engineering reference

Specify Beam Expander from the interfaces inward

Beam Expander is a configurable configurable scientific component in the Laser components and accessories family. The final part number should be released only after the optical, mechanical, electrical and environmental fields below are matched to the intended instrument.

This component must be qualified inside the complete optical, mechanical and electrical chain. Interfaces, performance limits and environmental conditions are coupled; a model name alone is not sufficient to release an instrument design.

Selection guidance describes the engineering fields that must be checked. It does not assign an option-dependent value that is absent from the catalog record.

Configuration fields to confirm

Primary function
State the required optical or mechanical result and the measurement tolerance.
Operating range
Define wavelength, motion, frequency or other applicable working range.
Performance budget
Set allowable loss, noise, drift, error and safety margin.
Physical interface
Confirm dimensions, aperture, connector, thread, hole pattern and datum surfaces.
Control interface
Specify supply, command, feedback, trigger and communications requirements.
Environment
State temperature, vacuum, humidity, contamination and duty-cycle conditions.

Qualification sequence

  1. 1Define the measurement objective and the performance limit that Beam Expander must satisfy.
  2. 2Freeze wavelength, mechanical, fiber and electrical interfaces before selecting option codes.
  3. 3Check loss, noise, heat, motion or vibration contributions in the complete system budget.
  4. 4Confirm the final drawing, pinout, environmental suffix and acceptance test with the quotation.

Technical FAQ

Configuration questions for Beam Expander

What must be specified before ordering Beam Expander?

Confirm primary function, operating range, performance budget, physical interface, control interface, and environment. These fields are coupled, so the final part number should be checked against the complete instrument rather than selected from the model name alone.

How should Beam Expander be integrated into the system?

This component must be qualified inside the complete optical, mechanical and electrical chain. Interfaces, performance limits and environmental conditions are coupled; a model name alone is not sufficient to release an instrument design. Freeze the optical, mechanical and electrical interfaces before releasing the surrounding assembly.

Which documentation should be approved for Beam Expander?

Approve the configuration-specific specification, mechanical drawing, connector or pinout definition, environmental suffix and acceptance-test limits supplied with the quotation. Any field absent from the local record remains a confirmation item, not an assumed capability.