---
title: "Light Source"
industry: "Computer, Electronic and Optical Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:LIGHT_SOURCE"
  data_integrity_hash: "dcde62e68db942f07e3148906feac24e"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:LIGHT_SOURCE"
  data_source_uri: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/light-source.md"
  official_resource_url: "https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/light-source"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "1.8-3.3 VDC, 15-30 mA, 620-680 nm wavelength"
    unit: "nm"
engineering_limits:
  max_safe_operating_point:
    value: 125
    unit: "°C"
    consequence: "Thermal runaway due to positive temperature coefficient of forward voltage, quantum efficiency degradation at high temperatures, electromigration in semiconductor junctions"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Transient voltage spike exceeding 5 V reverse bias"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Schottky diode reverse polarity protection with 3.6 V clamping voltage"
  - node_2:
      trigger: "Continuous operation at 85°C ambient temperature with inadequate heatsinking"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Copper-core PCB with 2.5 W/m·K thermal conductivity and forced air cooling at 0.5 m/s minimum"
bom_nodes:
  led-chip:
    type: "component"
    urn: "URN:CNFX:ME:LED_CHIP"
    interface_type: "physical-logic-coupled"
  lens:
    type: "component"
    urn: "URN:CNFX:ME:LENS"
    interface_type: "physical-logic-coupled"
  heat-sink:
    type: "component"
    urn: "URN:CNFX:ME:HEAT_SINK"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 8995-1:2021 (LIGHTING OF WORK PLACES - PART 1: INDOOR)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI C78.377-2017 (SPECIFICATIONS FOR THE CHROMATICITY OF SOLID STATE LIGHTING PRODUCTS)"
    scope: "Verified Engineering Specification"
  - standard: "DIN EN 60598-1:2021 (LUMINAIRES - PART 1: GENERAL REQUIREMENTS AND TESTS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/light-source.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "4291b4978d9773a94e1ba987815beaea181babb2e59359cc1f922523f26d5581"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Light Source

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

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **1.8-3.3 VDC, 15-30 mA, 620-680 nm wavelength**. Failure boundary: **LED junction temperature exceeding 125°C, forward current exceeding 40 mA, reverse voltage exceeding 5 V**, Mechanism: **Thermal runaway due to positive temperature coefficient of forward voltage, quantum efficiency degradation at high temperatures, electromigration in semiconductor junctions**.

### 2.1 Analytical Physics Model
Governed by the **Rayleigh Resolution Criterion**:

> **Primary Equation**: $d = \frac{0.61 \lambda}{NA}$  
> **Engineering Impact**: Defines the theoretical limit of machine vision systems.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| \lambda | Wavelength | Engineering Constant |
| NA | Numerical Aperture | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Transient voltage spike exceeding 5 V reverse bias | 8 | Catastrophic LED junction breakdown with permanent open circuit | Schottky diode reverse polarity protection with 3.6 V clamping voltage |
| Continuous operation at 85°C ambient temperature with inadequate heatsinking | 8 | Progressive luminous flux decay below 70% of initial output at 25°C | Copper-core PCB with 2.5 W/m·K thermal conductivity and forced air cooling at 0.5 m/s minimum |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | nm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Power Supply Unit**, **Optical Lens Assembly Station**, **Thermal Management System**  
**Downstream Applications**: Handheld Barcode Scanners, Fixed-Mount QR Code Readers, Mobile Computer Scanning Modules  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What is the primary function of this light source in barcode scanners?
**A**: 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.

### Q: Why is a heat sink included in the BOM for this LED light source?
**A**: 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.

### Q: How does the lens component improve scanner performance?
**A**: 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.

## 6. Manufacturing Compliance
- 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)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Light Source](https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/light-source)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: LIGHT_SOURCE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 2626d4f4
