Product Overview

🧠 About This Product

678nm is recognized as a golden wavelength for red light scalp photobiomodulation, positioned at the core of the optimal 650-680nm therapeutic window. This precise wavelength maximizes hair follicle activation and scalp microcirculation support, making it the preferred choice for professional photobiomodulation applications.

Our 678nm VCSEL (Vertical-Cavity Surface-Emitting Laser) Laser Diode in compact 2835 SMD package delivers precise wavelength control, concentrated 22° beam output, and easy integration. The ready-to-use 2835 SMD package supports direct PCB mounting and automated assembly, ideal for scalp wellness caps, handheld scalp devices, and clinical photobiomodulation systems. We provide flexible custom solutions to meet your needs from prototyping to mass production.

💡 Application Scenarios

• Scalp Wellness & Hair Follicle Support
  Activates hair follicles and improves scalp microcirculation. Suitable for red light scalp wellness caps, laser scalp care combs, and scalp photobiomodulation devices. Learn more →
• Scalp Health Management
  Professional scalp health monitoring and care equipment. Suitable for dermatology clinics and hair care centers requiring consistent output.
• Professional Photobiomodulation
  Clinical-grade photobiomodulation systems for professional use. Ideal for wellness clinics and medical aesthetics institutions.
• Home Scalp Care Devices
  Integrates into home scalp wellness devices, handheld scalp massagers, and wearable hair & scalp care equipment for convenient therapy.
• Additional Applications
  Compact 2835 SMD design suitable for space-constrained applications requiring reliable laser output.

Technical Specifications

📊 Technical Parameters

🌟 Product Advantages

• Golden Wavelength for Scalp Photobiomodulation
  678nm is positioned at the core of the optimal 650-680nm therapeutic window, maximizing hair follicle activation and scalp microcirculation support.
• Precise Wavelength Control
  Default ±10nm binning range, optional ±5nm or ±2nm precision customization. Improves photobiomodulation consistency and is suitable for scalp wellness and hair care applications requiring high standards.
• High-Efficiency Output
  Wall-plug efficiency of 15-20%, significantly higher than traditional LEDs (10-15%), delivering same brightness with lower power consumption.
• Symmetrical Far-Field Pattern
  Symmetrical far-field (typically donut-shaped), which may simplify optical design depending on application. Ideal for precision scalp wellness and hair care devices.
• Ready-to-Use 2835 SMD Package
  Standard 2835 SMD packaging enables direct PCB mounting and automated assembly. Significantly reduces integration time and manufacturing costs compared to bare die solutions.
• Concentrated Beam
  22° divergence angle provides concentrated output for precision scalp photobiomodulation applications. Significantly improves energy utilization efficiency.
• Low Threshold Drive
  2.6mA threshold current, compatible with battery-powered and low-power systems. Ideal choice for portable scalp care devices.
• Professional-Grade Quality Control
  Complies with RoHS / REACH / HF environmental standards, suitable for scalp wellness devices, hair care equipment, and professional photobiomodulation systems. Can support medical device certification processes with required quality/consistency/compliance documentation (subject to project requirements).
• Compact Design
  Small die size (8mil × 8mil) in compact 2835 SMD package facilitates integration into space-constrained applications and portable devices.

📦 Package Information

2835 SMD Package - Compact footprint (2.8mm × 3.5mm) with excellent thermal management and ease of integration. Ideal for scalp wellness caps, handheld scalp care devices, and general-purpose photobiomodulation applications.

💡 Need custom package sizes or specifications?
We provide flexible custom solutions including alternative package sizes and array configurations. Visit our Custom & ODM Services page to discuss your specific requirements.

Product Comparison

🔬 Why Choose 678nm VCSEL Over 660nm LED?

Technology Comparison Table

💡 Tip: Swipe left/right on mobile devices to view complete table

Core Advantage Interpretation

• Golden Wavelength Precision
  678nm is the optimal wavelength for red light scalp photobiomodulation, positioned at the core of the 650-680nm therapeutic window for maximum effectiveness. 660nm LED sits at the lower end of this spectrum.
• Superior Beam Quality
  22° divergence angle, concentrated output for precision scalp wellness applications, significantly improved energy utilization efficiency.
• Deeper Effective Illumination
  Under the same power density and optical design, VCSEL's narrow divergence and more concentrated energy distribution typically deliver better illumination utilization efficiency and consistency (specific effects depend on system design).
• Higher Efficiency
  15-20% higher conversion efficiency than LEDs (10-15%), suitable for battery-powered scalp care devices.
• More Precise Wavelength
  ±10nm tolerance (optional ±5nm / ±2nm), far superior to LED's ±20-30nm, ensuring consistent photobiomodulation results at the golden wavelength.
• Easy Integration
  Standard 2835 SMD packaging enables direct PCB mounting and automated assembly, reducing manufacturing complexity and costs.

Frequently Asked Questions

❓ FAQ