Editorial Technical Reference

Light Source / Magnetic Field Generator

This page explains how Light Source / Magnetic Field Generator is classified within Computer, Electronic and Optical Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A dual-function component in encoders that provides either optical illumination for optical encoders or generates magnetic fields for magnetic encoders.

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Light Source / Magnetic Field Generator

Definition
This component serves as the signal generation source within encoder systems. In optical encoders, it functions as a light source (typically LED or laser) that illuminates the code disc. In magnetic encoders, it generates a magnetic field that interacts with magnetic patterns on the encoder wheel. The specific function depends on the encoder type, but both serve to create detectable signals for position or speed measurement. The component is designed for integration into encoder assemblies and is available in configurations suitable for various industrial applications. It is characterized by its output wavelength, optical output power, magnetic flux density, supply voltage, supply current, operating temperature, storage temperature, relative humidity, ingress protection, material, weight, and dimensions. These parameters are provided as reference ranges and must be verified for the specific model and application. The component is intended for use in computer, electronic, and optical product manufacturing, specifically as a part of encoder systems. It is not a standalone product but a component that requires proper integration and calibration. The housing is typically made of aluminum alloy, and the component may include semiconductor materials, ferromagnetic materials, copper windings, and optical glass or plastic. The operating principle varies depending on the encoder type: for optical encoders, it emits light through semiconductor junctions or stimulated emission; for magnetic encoders, it uses permanent magnets or electromagnetic coils to generate stable magnetic fields. The generated light or magnetic field interacts with encoder patterns to create modulated signals detected by sensors. This component is essential for the functionality of both optical and magnetic encoders, enabling precise position and speed measurement in industrial automation, robotics, and other applications. It is important to note that the component's performance and compatibility must be confirmed with the legal manufacturer or supplier for each specific use case.
Working Principle
For optical function: Emits coherent or incoherent light through semiconductor junctions (LEDs) or stimulated emission (lasers). For magnetic function: Uses permanent magnets or electromagnetic coils to generate stable magnetic fields. The generated light or magnetic field interacts with encoder patterns to create modulated signals detected by sensors.
Common Materials
Semiconductor materials (GaAs, GaN), Ferromagnetic materials, Copper windings, Optical glass/plastic
Technical Parameters
ParameterTypical rangeNotes & selection driver
Output Wavelength630–680 nmVisible red light for optical encoders
Optical Output Power1–5 mWHigher power for longer distance or higher resolution
Magnetic Flux Density20–80 mTTypical range for magnetic encoders
Supply Voltage5 ±10% V DCCommon for encoder electronics
Supply Current10–50 mADepends on output power and type
Operating Temperature-40–85 °CIndustrial grade
Storage Temperature-40–100 °CNon-operating
Relative Humidity5–95 %Non-condensing
Ingress ProtectionIP40–IP67Higher for harsh environmentsIEC 60529
MaterialAluminum alloyHousing material
Weight5–20 gLightweight for compact designs
DimensionsØ8–Ø20 mmDiameter range

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
  • Emitter Chip Part
    Generates light through semiconductor junctions
    Material: GaAs/GaN semiconductor
  • Magnetic Core Part
    Concentrates and directs magnetic flux
    Material: Ferrite or rare-earth magnet
  • Lens/Optical Window Part
    Focuses or collimates emitted light
    Material: Optical glass or plastic
  • Field Coil Optional
    Generates the magnetic field electrically, where a permanent magnet is not suitable.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Light Source / Magnetic Field Generator.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 1 atm (non-pressurized)
other spec: Max magnetic field strength: 100 mT, Optical wavelength: 650-850 nm
temperature: -40°C to +85°C
Media Compatibility
✓ Clean air environments ✓ Non-corrosive industrial gases ✓ Dry inert atmospheres
Unsuitable: High moisture or condensing environments
Sizing Data Required
  • Encoder resolution requirement
  • Operating distance from sensing element
  • Required signal frequency/update rate

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Magnetic field degradation
Cause: Coil insulation breakdown due to thermal cycling or moisture ingress, leading to reduced magnetic flux density and unstable field generation
Light source intensity decay
Cause: Electrode erosion or phosphor degradation in discharge lamps, or LED junction overheating, resulting in diminished luminous output and spectral shift
Maintenance Indicators
  • Audible arcing or buzzing from the magnetic coil housing, indicating insulation failure or loose connections
  • Visible flickering, color temperature shift, or dark spots in the emitted light pattern, signaling imminent source failure
Engineering Tips
  • Implement active cooling with temperature monitoring for both magnetic coils and light sources to prevent thermal degradation
  • Use vibration-isolated mounting and surge protection to minimize mechanical stress and electrical transients on sensitive components

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 12100:2010 - Safety of machinery IEC 61010-1:2010 - Safety requirements for electrical equipment CE Marking - EU conformity for health, safety, and environmental protection

Quoted from the published standard.

Manufacturing Precision
  • Magnetic field strength: +/-5% of nominal value
  • Light output intensity: +/-10% of specified lumens
Quality Inspection
  • Electromagnetic compatibility (EMC) testing
  • Photometric performance verification

Manufacturers of Light Source / Magnetic Field Generator

Manufacturer profiles associated with Light Source / Magnetic Field Generator.

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Technical documentation
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Manufacturing capability
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Inspection readiness
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Frequently Asked Questions

What is the primary function of this component?

It generates either light for optical encoders or a magnetic field for magnetic encoders, enabling position or speed measurement.

What are the typical output parameters?

For optical encoders, output wavelength is 630–680 nm and optical output power is 1–5 mW. For magnetic encoders, magnetic flux density is 20–80 mT. Supply voltage is 5 V DC ±10% and supply current is 10–50 mA.

What environmental conditions can it withstand?

Operating temperature range is -40 to 85 °C, storage temperature -40 to 100 °C, relative humidity 5–95% non-condensing, and ingress protection IP40–IP67 per IEC 60529.

How should I verify compatibility for my application?

Confirm model-specific values such as dimensions, weight, and electrical characteristics with the legal manufacturer or supplier, as the listed ranges are reference only.

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.
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