Industry-Verified Manufacturing Data (2026)

Light Source

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Light Source used in the Computer, Electronic and Optical Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Light Source is characterized by the integration of LED Chip and Lens. In industrial production environments, manufacturers listed on CNFX commonly emphasize LED semiconductor material construction to support stable, high-cycle operation across diverse manufacturing scenarios.

The illumination component within a barcode/QR scanner that emits light onto the code for optical detection.

Product Specifications

Technical details and manufacturing context for Light Source

Definition
A light source is a critical component in barcode and QR code scanners that provides the necessary illumination to make the code's pattern visible to the scanner's optical sensor. It ensures consistent lighting conditions for accurate reading across various surfaces and environmental conditions.
Working Principle
The light source emits electromagnetic radiation (typically in the visible or infrared spectrum) that reflects off the barcode/QR code surface. The contrasting light and dark areas of the code create a pattern of reflected light that is captured by the scanner's sensor for decoding.
Common Materials
LED semiconductor material
Technical Parameters
  • Wavelength of emitted light, typically 630-680nm for red LED barcode scanners (nm) Per Request
Components / BOM
  • LED Chip
    Generates light through electroluminescence
    Material: Gallium arsenide phosphide (GaAsP) or similar semiconductor
  • Lens
    Focuses and directs the emitted light
    Material: Optical-grade plastic or glass
  • Heat Sink
    Dissipates heat generated by the LED
    Material: Aluminum or copper
Engineering Reasoning
1.8-3.3 VDC, 15-30 mA, 620-680 nm wavelength
LED junction temperature exceeding 125°C, forward current exceeding 40 mA, reverse voltage exceeding 5 V
Design Rationale: Thermal runaway due to positive temperature coefficient of forward voltage, quantum efficiency degradation at high temperatures, electromigration in semiconductor junctions
Risk Mitigation (FMEA)
Trigger Transient voltage spike exceeding 5 V reverse bias
Mode: Catastrophic LED junction breakdown with permanent open circuit
Strategy: Schottky diode reverse polarity protection with 3.6 V clamping voltage
Trigger Continuous operation at 85°C ambient temperature with inadequate heatsinking
Mode: Progressive luminous flux decay below 70% of initial output at 25°C
Strategy: Copper-core PCB with 2.5 W/m·K thermal conductivity and forced air cooling at 0.5 m/s minimum

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Light Source.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric (non-pressurized)
other spec: Wavelength: 650-670nm (visible red), Power: 5-20mW, Beam divergence: 15-30 degrees
temperature: -10°C to 50°C
Media Compatibility
✓ Indoor office environments ✓ Retail checkout stations ✓ Warehouse scanning stations
Unsuitable: Outdoor direct sunlight or high UV environments
Sizing Data Required
  • Required scanning distance (working range)
  • Target barcode/QR code size and resolution
  • Ambient light conditions in application environment

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Thermal Degradation
Cause: Excessive heat buildup from poor thermal management or overdriving the light source beyond its rated specifications, leading to accelerated phosphor decay, LED chip failure, or filament burnout in incandescent/halogen types.
Electrical Overstress
Cause: Voltage spikes, current surges, or improper power supply regulation causing semiconductor junction damage in LEDs, arc tube failure in HID lamps, or filament rupture in traditional bulbs.
Maintenance Indicators
  • Flickering or intermittent operation indicating unstable electrical connections or driver/ballast failure
  • Unusual audible buzzing or humming from the fixture, suggesting transformer/ballast issues or loose components
Engineering Tips
  • Implement proper thermal management with heatsinks, ventilation, or active cooling to maintain operating temperatures within manufacturer specifications
  • Use surge protection devices and regulated power supplies to prevent electrical overstress, and ensure all electrical connections are secure and corrosion-free

Compliance & Manufacturing Standards

Reference Standards
ISO 8995-1:2021 (Lighting of work places - Part 1: Indoor) ANSI C78.377-2017 (Specifications for the Chromaticity of Solid State Lighting Products) DIN EN 60598-1:2021 (Luminaires - Part 1: General requirements and tests)
Manufacturing Precision
  • Color Temperature: +/- 200K
  • Luminous Flux: +/- 10% of rated output
Quality Inspection
  • Photometric Testing (Goniophotometer)
  • Electrical Safety Testing (Dielectric Strength)

Factories Producing Light Source

Verified manufacturers with capability to produce this product in China

✓ 96% Supplier Capability Match Found

S Sourcing Manager from Australia Jan 16, 2026
★★★★★
"Standard OEM quality for Computer, Electronic and Optical Product Manufacturing applications. The Light Source arrived with full certification."
Technical Specifications Verified
P Procurement Specialist from Singapore Jan 13, 2026
★★★★☆
"Great transparency on the Light Source components. Essential for our Computer, Electronic and Optical Product Manufacturing supply chain. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Germany Jan 10, 2026
★★★★★
"The Light Source we sourced perfectly fits our Computer, Electronic and Optical Product Manufacturing production line requirements."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

7 sourcing managers are analyzing this specification now. Last inquiry for Light Source from India (1h ago).

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Frequently Asked Questions

What is the primary function of this light source in barcode scanners?

It emits focused light onto barcode or QR codes to enable optical sensors to accurately detect and decode the patterns for data capture in industrial and electronic applications.

Why is a heat sink included in the BOM for this LED light source?

The heat sink manages thermal output from the LED chip, preventing overheating that could reduce light output, degrade materials, or shorten the component's lifespan in continuous-use industrial environments.

How does the lens component improve scanner performance?

The lens focuses and directs the LED light precisely onto the code surface, enhancing illumination consistency and optical detection accuracy for reliable scanning across various distances and angles.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

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