Illumination Source: Power Output 5-50 mW

Component Specifications

Definition

An illumination source in barcode readers is a critical optical component that emits controlled light onto barcode surfaces to create contrast between bars and spaces. It ensures consistent reflectance patterns that the reader's sensor can detect and decode into digital data. These sources are engineered for specific wavelengths, intensity stability, and durability in industrial environments.

Working Principle

The illumination source operates by emitting light (typically LED-based) at specific wavelengths (commonly 660nm red or 850nm infrared) onto barcode surfaces. The light reflects differently from dark bars (absorbing light) and light spaces (reflecting light), creating a contrast pattern. This reflected light is captured by the reader's sensor and converted into electrical signals for decoding. Advanced systems may use multiple wavelengths or structured lighting patterns to handle challenging surfaces.

Materials

LED chips (GaAs, GaAlAs, or InGaN semiconductors), aluminum or copper heat sinks, polycarbonate or glass lenses, epoxy encapsulation, gold bonding wires, ceramic substrates, and stainless steel housings.

Technical Parameters

Parameter	Typical range	Notes & selection driver
IP Rating	IP54 or higher
Beam Angle	15-60 degrees
Wavelength	660nm (red) or 850nm (IR)
Power Output	5-50 mW
Life Expectancy	50,000-100,000 hours
Operating Voltage	3.3V or 5V DC
Luminous Intensity	100-5000 mcd
Current Consumption	20-150 mA
Operating Temperature	-20°C to +70°C

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

Standards

ISO/IEC 15416, ISO/IEC 15426-1, DIN 66399

Parent Products

This component is used in the following industrial products

Barcode Reader

An optical scanning device that reads printed barcodes and converts them into digital data for identification and tracking purposes.

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Engineering Analysis

Risks & Mitigation

LED degradation over time
Heat buildup affecting performance
Inconsistent illumination causing read errors
Wavelength mismatch with barcode material
Environmental contamination on lens surface

FMEA Triads

Trigger: Thermal stress from continuous operation
Failure: LED output degradation or complete failure
Mitigation: Implement proper heat sinking, use thermal management circuits, and follow duty cycle recommendations

Trigger: Voltage spikes or electrical overstress
Failure: Premature LED burnout or circuit damage
Mitigation: Include surge protection, voltage regulation, and current limiting in driver circuits

Trigger: Contamination accumulation on optical surfaces
Failure: Reduced light output and scanning reliability
Mitigation: Use sealed housings, implement regular cleaning protocols, and select appropriate IP ratings

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±5% wavelength stability, ±10% intensity variation across operating temperature range

Test Method

ISO/IEC 15426-1 for verification performance, ANSI/UL 60950-1 for electrical safety, IEC 62471 for photobiological safety

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Illumination Source

Manufacturer profiles associated with Illumination Source.

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Frequently Asked Questions

Why do barcode readers need specific illumination sources?

Barcode readers require specific illumination sources to provide consistent, wavelength-optimized light that creates maximum contrast between barcode elements. Different materials and printing methods reflect light differently, so specialized sources ensure reliable scanning across various conditions.

What is the difference between red and infrared illumination sources?

Red illumination (660nm) works best with traditional printed barcodes on paper or labels, while infrared (850nm) is better for reading barcodes through protective coatings, on dark surfaces, or in environments with ambient red light interference. Some readers use both wavelengths for maximum versatility.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

Illumination Source