INDUSTRY COMPONENT

Optical Filter

Optical filter selectively transmits specific wavelengths while blocking others in phototherapy devices.

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Component Specifications

Definition
An optical filter is a precision optical component designed to selectively transmit or block specific wavelengths of light in the visible and near-infrared spectrum. In portable home phototherapy devices, it precisely controls the spectral output to ensure therapeutic wavelengths (typically 400-500nm for neonatal jaundice treatment) are delivered while filtering out potentially harmful UV and infrared radiation. The filter maintains consistent optical performance across temperature variations and device orientations.
Working Principle
Operates through interference or absorption mechanisms. Interference filters use thin-film coatings to create constructive/destructive interference for specific wavelengths, while absorption filters utilize dyed glass or plastic materials that absorb unwanted wavelengths. The filter precisely separates therapeutic blue light (peak ~450nm) from other spectral components.
Materials
Optical glass substrate (BK7, fused silica) with dielectric thin-film coatings (TiO2, SiO2, MgF2) or colored optical polymers (PMMA, polycarbonate) with UV stabilizers. Coating thickness: 100-500nm per layer with 10-50 layers total.
Technical Parameters
  • Diameter 25.4±0.1mm
  • Thickness 2.0±0.2mm
  • Blocking Range <1% transmission at 300-400nm & 500-700nm
  • Surface Quality 60-40 scratch-dig
  • Bandwidth (FWHM) 30±5nm
  • Angular Tolerance ±2°
  • Center Wavelength 450±5nm
  • Peak Transmission >85%
  • Operating Temperature -10°C to +60°C
Standards
ISO 10110, ISO 14997, DIN 3140, DIN 58196

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Optical Filter.

optical filter phototherapy filter medical optical component wavelength filter blue light filter therapeutic light filter portable medical device component Optical Filter in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Portable Home Phototherapy Device

Consumer-grade light therapy device for home treatment of skin conditions

View Product Details

Receiver Sensor

Optoelectronic component that detects and converts laser light signals into electrical signals within a laser scanner system.

View Product Details

Light Sensor

A device that detects and measures light intensity or illuminance.

View Product Details

Engineering Analysis

Risks & Mitigation
  • Wavelength drift over time
  • Coating delamination
  • Surface contamination reducing transmission
  • Thermal damage from prolonged exposure
  • Mechanical cracking from improper handling
FMEA Triads
Trigger: Coating degradation from UV exposure
Failure: Reduced transmission efficiency below 70%
Mitigation: Implement UV-blocking pre-filters and scheduled replacement intervals (every 2 years or 2000 hours)
Trigger: Thermal expansion mismatch between layers
Failure: Wavelength shift exceeding ±10nm
Mitigation: Use materials with matched CTE and thermal cycling testing from -20°C to +80°C

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Wavelength: ±2nm, Transmission: ±3%, Dimensions: ±0.1mm
Test Method
Spectrophotometry (ISO 13695), Environmental testing (IEC 60601-1), Biocompatibility (ISO 10993)

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

Why is wavelength precision critical in phototherapy filters?

Therapeutic effectiveness depends on delivering specific wavelengths (450nm for bilirubin breakdown) while blocking harmful UV/IR radiation. Even 10nm deviation can reduce treatment efficacy by 30% or cause skin damage.

How do environmental factors affect filter performance?

Temperature changes cause wavelength shifts (~0.02nm/°C), humidity affects coating adhesion, and mechanical stress alters optical path. Medical-grade filters include compensation coatings and robust sealing.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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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Optical Entrance Slit Optical Filter Layer