Galvanometer Mirror

Product Specifications

Technical details and manufacturing context for Galvanometer Mirror

Definition

A galvanometer mirror is a critical component within beam steering systems that enables precise, high-speed directional control of laser beams. It consists of a small, lightweight mirror mounted on a galvanometer motor assembly that can rotate the mirror along one or two axes with exceptional speed and accuracy. This allows for rapid scanning, positioning, and modulation of laser light in applications such as laser marking, material processing, 3D printing, and optical communications. The mirror is typically made from substrates like silicon, fused silica, or borosilicate glass, with reflective coatings optimized for specific wavelengths and power levels. Key parameters include mirror diameter (10–50 mm), thickness (1–5 mm), surface flatness (λ/10–λ/4 at 633 nm per ISO 10110), surface roughness (0.5–2 nm Ra per ISO 4287), and coating reflectivity (99.0–99.9%). Dynamic performance is characterized by scanning angle (±20° to ±40°), step response time (0.2–1.0 ms for a 1° step), and drift (≤15 µrad/°C). Operating temperature range is -10°C to 50°C, storage -20°C to 70°C, and relative humidity 10–90% non-condensing. Substrate materials include Si, Mo, and BK7, with dielectric or metal coatings. Weight ranges from 5 to 50 g. These specifications are typical ranges; actual values must be verified with the manufacturer for specific models and applications. The galvanometer mirror is a component, not a standalone system, and its performance depends on integration with a suitable driver and control electronics.

Working Principle

The galvanometer mirror operates by converting electrical signals into precise mechanical rotation. When current flows through the galvanometer's coil within a magnetic field, it generates torque that rotates the mirror assembly. The angle of rotation is proportional to the input current, allowing electronic control systems to precisely position the mirror and thus deflect the laser beam to specific coordinates with high repeatability and minimal settling time.

Common Materials

Silicon, Fused silica, Borosilicate glass

Technical Parameters

Parameter	Typical range	Notes & selection driver
Mirror Diameter	10–50 mm	Determines beam aperture and inertia
Mirror Thickness	1–5 mm	Affects stiffness and resonant frequency
Surface Flatness	λ/10–λ/4 at 633 nm	Critical for beam qualityISO 10110
Surface Roughness	0.5–2 nm Ra	Lower scatter for high-power lasersISO 4287
Coating Reflectivity	99.0–99.9 %	Depends on wavelength and angle
Scanning Angle	±20–±40 °	Limited by motor and driver
Step Response Time	0.2–1.0 ms	For 1° step, small-angle
Drift	≤15 µrad/°C	Thermal stability of position
Operating Temperature	-10–50 °C	Outside range affects performance
Storage Temperature	-20–70 °C	Non-condensing environment
Relative Humidity	10–90 % RH	Non-condensing
Substrate Material	Si, Mo, BK7	Silicon for high power, Mo for durability
Coating Type	Dielectric, Metal	Dielectric for high damage threshold
Weight	5–50 g	Affects dynamic performance

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Mirror substrate Part
Provides structural base for reflective coating

Material: Silicon or glass
Reflective coating Part
Enhances reflectivity at specific laser wavelengths

Material: Dielectric coating or metal film
Galvanometer motor
Converts electrical signals to precise rotational motion

Material: Copper windings, permanent magnets
Position sensor
Provides feedback on mirror angle for closed-loop control

Material: Capacitive or optical sensor elements

Application & selection

Application Fit & Sizing Matrix

Operational Limits

pressure:	Atmospheric pressure only (sealed optical assembly)
other spec:	Max angular velocity: 500-2000 rad/s (model dependent), Max mirror acceleration: 50,000-200,000 rad/s², Mirror aperture: 5-25 mm diameter
temperature:	-10°C to +50°C (operating), -20°C to +70°C (storage)

Media Compatibility

✓ Laser marking/engraving systems ✓ Medical laser scanning devices ✓ 3D printing/LIDAR scanning systems

Unsuitable: High-vibration industrial environments (e.g., heavy machinery adjacent)

Sizing Data Required

Required scanning angle (optical degrees)
Laser wavelength and beam diameter
Required positioning accuracy and repeatability

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause

Mirror surface degradation

Cause: Accumulation of dust, moisture, or chemical contaminants leading to reduced reflectivity and optical distortion, often due to inadequate sealing or environmental exposure.

Bearing or pivot mechanism wear

Cause: Mechanical fatigue or friction from continuous high-speed oscillation, exacerbated by lack of lubrication, misalignment, or particulate ingress into moving parts.

Maintenance Indicators

Erratic or unstable beam deflection during operation, indicating mechanical binding or electrical instability
Visible scratches, clouding, or discoloration on the mirror surface, suggesting contamination or physical damage

Engineering Tips

Implement regular cleaning with approved optical-grade solvents and lint-free wipes in a controlled environment to prevent surface contamination without damaging coatings
Establish a preventive maintenance schedule for lubrication of pivot points and inspection of alignment, using manufacturer-specified lubricants and torque settings to minimize wear

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards

ISO 10110-5:2015 (Optics and photonics - Preparation of drawings for optical elements and systems - Part 5: Surface form tolerances) ASTM E903-20 (Standard Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Spheres) CE marking for electromagnetic compatibility (EMC) under Directive 2014/30/EU

Quoted from the published standard.

Manufacturing Precision

Mirror flatness: λ/10 at 632.8 nm (HeNe laser wavelength)
Mounting bore concentricity: ±0.005 mm

Quality Inspection

Interferometric surface flatness test
Dynamic response and resonance frequency verification

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

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Manufacturing capability

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Inspection readiness

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Supplier transparency

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Manufacturers of Galvanometer Mirror

Manufacturer profiles associated with Galvanometer Mirror.

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Frequently Asked Questions

What is a galvanometer mirror used for?

It is used to rapidly and precisely steer laser beams in applications such as laser marking, material processing, 3D printing, and optical communications.

What materials are commonly used for galvanometer mirrors?

Common substrate materials include silicon, fused silica, borosilicate glass, and molybdenum. The choice depends on factors like thermal stability, weight, and durability.

What are typical specifications for surface flatness and roughness?

Surface flatness is typically λ/10 to λ/4 at 633 nm per ISO 10110, and surface roughness is 0.5 to 2 nm Ra per ISO 4287. These affect beam quality and scatter.

How do I choose the right galvanometer mirror for my system?

Consider mirror diameter, thickness, coating reflectivity, scanning angle, step response time, and operating environment. Always verify model-specific values with the manufacturer.

Related equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Beam Steering System

View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems

Downstream Applications

Specialized Tooling

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Galvanometer Mirror.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 12 October 2026

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