# How a Rectangular Laser Fiber Improves Skin Treatments

> A laser skin treatment tool that uses a special rectangular fiber optic cable to deliver uniform, square-shaped beams from two different laser types at once.

- **Patent:** US 12167890
- **Original title:** Laser device for dermocosmetic treatments and tracing kit
- **Owner:** BIOS Srl
- **Granted:** 2024
- **Status:** Active
- **Times cited:** 0
- **Field:** consumer_electronics, mechanical

## What it does

This patent describes a handpiece for skin treatments that uses a single rectangular-shaped optical fiber to channel light from two different laser sources. By using a rectangular core rather than a traditional circular one, the device creates uniform, sharp-edged rectangular light patterns on the skin. The system includes an illuminator to help the operator see the treatment area and sensors that track the handpiece's position. This ensures the lasers only fire when the device is correctly aligned with the target area, preventing overlap or missed spots.

## What it does NOT cover

- Does not cover circular or non-rectangular laser beam profiles.
- Does not cover systems that lack a secondary illuminator for pre-treatment visualization.
- Does not cover laser systems that use a single wavelength source.
- Does not cover non-contact laser systems that lack position-sensing synchronization.

## The clever bit

The use of a single-core rectangular optical fiber to homogenize and shape the output of two distinct laser wavelengths (like Nd:YAG and Alexandrite) simultaneously, ensuring uniform intensity across the entire rectangular footprint.

## Real-world examples

1. Dermatological laser hair removal systems
2. Skin resurfacing devices
3. Pigmented lesion removal tools

## Why it matters

In dermatology, overlapping laser pulses can cause burns or uneven results, while gaps lead to ineffective treatment. By forcing the laser light into a precise rectangular shape, this invention allows practitioners to 'tile' the treatment area like a grid, which is significantly more efficient and safer than trying to overlap circular beams.

## Frequently asked questions

### What does How a Rectangular Laser Fiber Improves Skin Treatments cover?

A laser skin treatment tool that uses a special rectangular fiber optic cable to deliver uniform, square-shaped beams from two different laser types at once.

### Who owns patent US 12167890?

BIOS Srl owns this patent, granted in 2024.

### When does this patent expire?

This patent is expected to expire on December 17, 2044, when the invention enters the public domain.

### What problem does this patent solve?

In dermatology, overlapping laser pulses can cause burns or uneven results, while gaps lead to ineffective treatment. By forcing the laser light into a precise rectangular shape, this invention allows practitioners to 'tile' the treatment area like a grid, which is significantly more efficient and safer than trying to overlap circular beams.

### What does this patent NOT cover?

Does not cover circular or non-rectangular laser beam profiles.

**Full plain-English explainer:** https://patentbrief.org/patent/us/12167890/cargo-dragon

**Original patent:** https://patents.google.com/patent/US12167890

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_Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._