A laser slit beam workstation evaluates wrinkles by projecting a beam of light onto a skin replica and analyzing how that light deforms. A CCD camera captures these deformations as optical section images to map the surface topography. Through 3D reconstruction, the system converts these images into precise calculations of wrinkle volume and depth, providing an objective measurement of photoaging.
By transforming the physical distortion of a laser beam into 3D data, this system replaces subjective visual estimation with quantitative physical indicators of skin damage.
The Mechanics of Data Capture
Projection and Deformation
The process begins by projecting a laser slit beam onto the surface of a skin replica.
As the light hits the texture of the replica, the beam physically deforms, following the contours of the wrinkles.
Optical Sectioning
A CCD camera captures these deformations in real-time.
The camera records the distorted beam as a series of "optical section images," effectively slicing the topography of the skin replica into visual data points.
Calculating Quantitative Indicators
Three-Dimensional Reconstruction
The system does not simply analyze 2D photographs; it performs a 3D reconstruction using the optical sections.
This creates a digital topographical map of the skin's surface, allowing for volumetric analysis rather than just surface area measurement.
Key Metrics for Assessment
Once the 3D model is generated, the workstation calculates specific morphological parameters.
It specifically quantifies the volume and average depth of primary wrinkles.
These metrics serve as objective physical indicators, allowing researchers to accurately grade the degree of photoaging.
Understanding the Operational Context
Reliance on Replicas
The system is designed to analyze skin replicas (impressions of the skin), not living skin directly.
This means the accuracy of the evaluation is partly dependent on the fidelity of the replica itself.
Focus on Primary Structures
The workstation is optimized to measure primary wrinkles.
It focuses on significant morphological changes—volume and depth—rather than just superficial surface roughness.
Making the Right Choice for Your Goal
To maximize the value of this technology, align its capabilities with your specific analysis needs:
- If your primary focus is objective benchmarking: Rely on the volume and average depth metrics to track changes over time, rather than visual grading.
- If your primary focus is photoaging research: Use the 3D reconstruction capabilities to obtain physical indicators that correlate directly with the degree of sun damage.
This workstation turns the abstract concept of "aging" into measurable, physical data points.
Summary Table:
| Feature | Description |
|---|---|
| Core Technology | Laser slit beam projection & CCD camera capture |
| Analysis Material | High-fidelity skin replicas (impressions) |
| Measurement Method | 3D topographical reconstruction from optical sections |
| Key Quantifiers | Wrinkle volume and average depth |
| Primary Application | Objective assessment of photoaging and skin damage |
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References
- Shingo Sakai, Masayuki Matsumoto. Relationship between dermal birefringence and the skin surface roughness of photoaged human skin. DOI: 10.1117/1.3207142
This article is also based on technical information from Belislaser Knowledge Base .
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