The ability to continuously adjust spot size is the critical factor in controlling the depth of laser penetration during tattoo removal. By allowing the practitioner to maximize the beam diameter for a specific energy setting, this feature minimizes light scattering and ensures energy reaches pigments located deep within the dermis.
Core Takeaway The diameter of the laser beam is the primary lever for controlling how deep energy penetrates the skin. Continuous adjustment allows for the largest possible spot size at a specific energy density (fluence), optimizing both the depth of pigment removal and the efficiency of clearance.
The Physics of Penetration Depth
Combatting Light Scattering
When a laser beam enters the skin, the tissue naturally scatters the light.
A larger spot size diameter significantly reduces this scattering effect.
By maintaining a tighter column of light, a larger spot size ensures the energy remains focused as it travels through the skin layers.
Targeting the Deep Dermis
Tattoo ink is often embedded deep within the dermis.
If the spot size is too small, scattering disperses the energy before it can reach these deeper layers.
A maximized spot size allows the laser energy to bypass superficial scattering and deliver the necessary impact to the deepest pigments.
The Advantage of Continuous Adjustment
Precision Beyond Fixed Settings
Many laser systems offer fixed spot sizes (e.g., 3mm, 4mm, 5mm).
Continuous adjustment allows for granular precision (e.g., 3.8mm or 4.2mm).
This capability is vital because spot size and energy density (fluence) are inversely related.
Matching Size to Fluence
To break down tattoo ink, you need a specific amount of fluence.
Continuous adjustment enables the practitioner to dial in the largest possible spot size that the laser system can support at that specific fluence.
This optimizes the treatment by ensuring you are always operating at maximum penetration depth for the required power level.
Enhancing Clearance Efficiency
The primary reference notes that this functionality directly optimizes clearance efficiency.
By penetrating deeper and covering the maximum effective area, fewer passes or sessions may be required to clear deep pigment.
Understanding the Operational Trade-offs
The Fluence Limit
While a larger spot size is always desirable for depth, it requires significant raw power from the laser system.
As you increase the spot size, the energy density (fluence) spreads out and decreases.
Balancing Power and Size
There is a physical limit to how wide you can set the beam while still maintaining enough energy to shatter the ink.
If the spot size is increased too much without a corresponding increase in system power, the fluence may drop below the therapeutic threshold, rendering the shot ineffective.
Optimizing Your Treatment Strategy
To achieve the best clinical outcomes, you must balance the need for depth with the need for energy density.
- If your primary focus is Deep Pigment: Prioritize the largest spot size possible, even if it requires a slight reduction in fluence, to minimize scattering.
- If your primary focus is Stubborn, Dense Ink: You may need to prioritize higher fluence to break the pigment, which might necessitate a slightly smaller spot size.
Ultimately, the goal is to find the largest diameter that still delivers the energy required to shatter the ink.
Summary Table:
| Feature | Impact on Treatment | Clinical Benefit |
|---|---|---|
| Large Spot Size | Reduces light scattering in tissue | Better penetration to deep dermis |
| Small Spot Size | Higher fluence concentration | Effective for stubborn, dense ink |
| Continuous Adjustment | Granular precision (e.g., 3.8mm) | Optimal balance of power and depth |
| High Fluence | Intense energy delivery | Efficient shattering of ink pigments |
Elevate Your Clinic’s Results with BELIS Advanced Laser Technology
Precision is the key to superior patient outcomes. BELIS specializes in professional-grade medical aesthetic equipment designed exclusively for clinics and premium salons. Our advanced laser systems, including Nd:YAG and Pico lasers, feature continuously adjustable spot sizes to ensure you achieve the perfect balance of penetration depth and energy density for every tattoo removal session.
Beyond tattoo removal, our comprehensive portfolio includes:
- Advanced Lasers: Diode Hair Removal, CO2 Fractional, and Microneedle RF.
- Body Sculpting: EMSlim, Cryolipolysis, and RF Cavitation.
- Specialized Care: Hydrafacial systems, skin testers, and hair growth machines.
Ready to upgrade your practice with industry-leading technology?
Contact BELIS Today to Request a Quote
References
- Eric F. Bernstein, Jennifer M. Civiok. A continuously variable beam‐diameter, high‐fluence, Q‐switched Nd:YAG laser for tattoo removal: Comparison of the maximum beam diameter to a standard 4‐mm‐diameter treatment beam. DOI: 10.1002/lsm.22203
This article is also based on technical information from Belislaser Knowledge Base .
Related Products
- Clinic Use IPL and SHR Hair Removal Machine with Nd Yag Laser Tattoo Removal
- Pico Laser Tattoo Removal Machine Picosure Picosecond Laser Machine
- Pico Picosecond Laser Machine for Tattoo Removal Picosure Pico Laser
- Diode Tri Laser Hair Removal Machine for Clinic Use
- Fractional CO2 Laser Machine for Skin Treatment
People Also Ask
- How much do IPL treatments cost? A Guide to Investing in Clear, Smooth Skin
- What are the negative effects of IPL? Understanding Risks for Safe Treatment
- Can you see results after 1 IPL? What to Expect from Your First Treatment
- What is intense pulsed light good for? A Versatile Solution for Sun Spots, Redness, and Hair
- Can you use a hair removal device on private parts? A Safe Zone Guide for Intimate Areas
