Beam Expanders

A beam expander is an optical device composed of a lens assembly. It adjusts the diameter and divergence angle of the incident laser beam to achieve collimated beam expansion or contraction. Based on the optical path design, it can be categorized into two types: Galilean (without an internal focus) and Keplerian (with an internal focus).

 

1. What are the Core Parameters of Beam Expanders?

Beam Expansion Ratio: Adjustable from 2× to 20×, with a common industrial range of 3× to 10×.

Clear Aperture: Φ5mm-Φ50mm (compatible with lasers of varying power).

Wavelength Compatibility:

Ultraviolet (193-355nm)

Visible light (400-700nm)

Infrared (780-1550nm)

 

Wavefront Distortion: <λ/4 @ 633nm (high-precision model)

 

2. What are the Typical Application Scenarios of Beam Expanders?

Application Areas	Functional Requirements	Selection Key Points
Laser Processing	Focused Spot Size Control	Damage Threshold >5J/cm²
Optical Measurement	Reduced Beam Divergence	Achromatic Design
Medical Aesthetics	Uniform Energy Distribution	Compact Structure
Space Communications	Long-Distance Transmission Optimization	Temperature Stability ±0.01%/°C

 

3. What are the Technology Trends of Beam Expanders?

Active Adjustment: Piezoelectric Ceramic-Driven Real-Time Zoom System

Ultra-Wideband Design: 400-1100nm Continuous Spectrum Adaptation

Integrated Solution: Intelligent Feedback Model with Integrated PSD Sensor

New Material: Calcium Fluoride (CaF₂) Lens Improves UV Performance