# 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 --- _Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._ ## Related patents Semantically similar inventions in the PatentBrief corpus: - [Device for Treating Soft Tissue on Face or Chin with RF and Electricity](https://patentbrief.org/patent/us/12734353/systems-and-methods-for-treatment-of-a-patient-including-rf-and-electrical) — This patent describes a device that attaches to a patient's face or chin to treat soft tissue by heating it with radiofrequency energy and causing muscles to contract with electric current. - [A Medical Device for Puncturing Tissue with an Energy-Delivering Tip](https://patentbrief.org/patent/us/12733955/methods-and-devices-for-puncturing-tissue) — This patent describes a medical device designed to puncture tissue using an energy-delivering tip, featuring a specific shape with curved and straight sections and a constant diameter layer for precise control. - [Routing Light Between Fiber Cores Using Special Reflectors](https://patentbrief.org/patent/us/11646794/fiber-optic-connectors-and-connectorized-fiber-optic-cables-that-include-integra) — This patent describes a fiber optic connector that uses tiny, specially designed reflectors called holographic Bragg gratings to precisely guide light signals from one optical fiber to multiple other fibers, even separating different colors (wavelengths) of light. - [How a Wearable Device Measures Heart Rate and Blood Flow with Lasers](https://patentbrief.org/patent/us/12733827/optical-sensor-module) — This patent describes a wearable device that uses a single laser and two different optical sensors—an image sensor and a photodiode—to measure both blood flow patterns (SPG) and blood volume changes (PPG) from biological tissue. - [How to Connect Wires and Light Signals Through a Protective Cloth](https://patentbrief.org/patent/us/12734006/connection-systems-and-methods-for-establishing-optical-and-electrical) — This patent describes a system to make both electrical and optical connections by pushing a plug into a socket, with a protective cloth or 'drape' placed in between, where a sharp part on the plug pokes through the drape.