A diffractive lens assembly acts as a precision optical splitter. Instead of delivering raw laser energy in a single, broad blast, this component utilizes approximately 1,000 diffractive elements to redistribute a single beam into a large, uniform array of micro-spots. This creates distinct zones of high energy for treatment and low energy for safety, fundamentally changing how the laser interacts with tissue.
The core value of diffractive optics is the ability to decouple treatment depth from surface damage. By focusing energy solely into high-temperature peak zones, the system treats deep tissue while preserving the surrounding area to ensure rapid healing.
The Mechanics of Fractional Energy Delivery
From One Beam to Many
The primary function of the diffractive lens is scattering and redistribution. The assembly takes a singular laser beam and processes it through a complex array of diffractive elements.
This splits the light into a massive grid of micro-spots. This transforms a "flood" of light into a precise "shower" of targeted energy.
Achieving Uniformity
Uniformity is critical for predictable results. The diffractive assembly ensures that the redistributed micro-spots cover a large area evenly.
This prevents the formation of accidental "hot spots" that could cause burns, or weak spots that would result in ineffective treatment.
Optimizing Tissue Interaction
High-Temperature Peak Zones
The optical processing focuses the laser's power into specific peak zones. In these microscopic areas, the temperature rises significantly to achieve the necessary therapeutic effect.
This allows the laser to penetrate to the required treatment depth. The energy is not wasted on the surface but is driven deep where it is needed most.
Low-Temperature Safety Zones
The true innovation lies in what the laser doesn't touch. The lens assembly ensures that the areas immediately surrounding the peak zones remain as low-temperature zones.
By maintaining these cool, untreated bridges of tissue, the system minimizes excessive tissue damage. This preservation of healthy tissue is the mechanism that allows for faster recovery despite the depth of the treatment.
Understanding the Trade-offs
Precision vs. Coverage Complexity
While diffractive lenses offer superior control, they rely on the intricate balance of nearly 1,000 optical elements. The system must maintain perfect alignment to ensure the micro-spots remain uniform.
Depth vs. Surface Area
The system is designed to prioritize depth in specific spots over total surface ablation. If the goal is to remove the entire top layer of tissue uniformly, a fractional diffractive approach creates islands of treatment rather than a continuous field.
Making the Right Choice for Your Goal
When evaluating laser systems, understanding the role of the diffractive lens helps clarify the clinical outcome.
- If your primary focus is aggressive deep-tissue remodeling: Prioritize systems where the diffractive lens creates high-intensity peak zones to maximize penetration depth.
- If your primary focus is rapid patient recovery: Rely on the lens's ability to maintain low-temperature zones, which minimizes collateral damage and speeds up healing.
The diffractive lens assembly transforms a laser from a blunt instrument into a precision tool, balancing deep efficacy with surface safety.
Summary Table:
| Feature | Function & Impact |
|---|---|
| Optical Mechanism | Uses ~1,000 diffractive elements to split a single beam into a grid of micro-spots. |
| Energy Distribution | Creates high-temperature 'peak zones' for treatment and low-temperature 'safety zones' for healing. |
| Depth vs. Safety | Decouples treatment depth from surface damage, allowing for deep remodeling. |
| Clinical Benefit | Minimizes collateral tissue damage, leading to significantly faster patient recovery times. |
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References
- А. А. Кубанова, Natalia Mikhailova. Skin rejuvenation with the use of fractional photothermolysis(MultiPlex technology) in a combination with the CAP system. DOI: 10.25208/vdv998
This article is also based on technical information from Belislaser Knowledge Base .
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