What is the difference between red light and near-infrared light (근적외선)?

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What is the difference between red light and near-infrared light (근적외선)?

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The main differences between red light and near infrared light (근적외선) are their wavelength, penetration depth, and bio-effects. Below is a detailed comparison and guide on how to choose the right wavelength for your needs:

  1. Wavelength and penetration depth
    Parameters Red light Near infrared light (근적외선)
    Wavelength range 600–700 nm (예를 들어. 660 nm) 700–1100 nm (예를 들어. 850 nm)
    Penetration depth 1–5 mm (skin layer) 5–10 cm (근육, bones, 관절)
    Primary targets Skin, superficial tissues Deep tissues, organs, brain
    Importance:

Red light is very beneficial for skin health (collagen production, wound healing).

NIR light reaches muscles, tendons, and joints, providing better pain relief and improved recovery.

  1. Bio-effects
    빨간불 (예를 들어. 660nm)
    Boosts collagen and elastin production → anti-aging, reduces acne/scars.

Reduce surface inflammation (예를 들어. sunburn, eczema).

Stimulate hair follicles (for hair growth devices).

Near infrared light (예를 들어. 850nm)
Accelerate muscle repair → post-exercise recovery, relieve delayed onset muscle soreness (DOMS).

Reduce deep inflammation (예를 들어. arthritis, tendinitis).

Enhance brain function (emerging research in neuroprotection).

  1. How to choose the right wavelength?
    For skin and beauty
    Best: 660nm red light (예를 들어. for wrinkles, 좌창, rosacea).

장치:

Merican Red Light Therapy Panel M1

Pain and muscle recovery
Best: 850nm near infrared (or 660nm + 850nm dual wavelength).

장치:

Merican Red Light Therapy Panel M2

Joints and deep tissue
Best: 810nm or 850nm near infrared (can penetrate bones/tendons).

Example: Merican Red Light Therapy Bed M4N

Overall Health
Best: Red + NIR combination (예를 들어. 660nm + 850nm).

Example: Merican Red Light Therapy Bed M-MB

  1. Key Considerations
    Dual wavelength devices (예를 들어. 660nm + 850nm) provide the broadest benefits.

Power density (≥50–100 mW/cm²) is more important than wavelength alone.

Avoid cheap devices with unproven wavelengths (ineffective or unsafe).

  1. Safety Tips
    Eyes: NIR light penetrates eyelids → wear goggles for prolonged exposure.

Contraindications: Avoid if pregnant or with active cancer (consult your doctor).

Final Tip: If unsure, choose a red/NIR combination device (예를 들어. 메리칸). Start with 10–15 minutes, 3–5 times per week and adjust based on results.

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