# 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: - [How Light-Activated Polymers Deliver Skin Care Ingredients](https://patentbrief.org/patent/us/12178901/dragon-xl) — A chemical structure that holds onto skin-care ingredients like fragrances or cooling agents and releases them only when triggered by specific light conditions. - [A Sealed, Stamped Metal Assembly for Guiding Light in Fiber Optics](https://patentbrief.org/patent/us/10761280/hermetic-optical-subassembly) — This patent describes a tiny, sealed optical assembly that uses precisely shaped metal parts and mirrors to guide light signals between a fiber optic cable and an electronic light-emitting or light-sensing device without needing lenses between the main mirrors. - [Using Different Light Colors to Detect Touches on Screens](https://patentbrief.org/patent/us/20110234542/methods-and-systems-utilizing-multiple-wavelengths-for-position-detection) — This 2011 patent describes a system that uses two different colors of light to accurately detect where an object, like a finger, touches a screen or surface. - [How to Take 3D Pictures Inside Human Tissue Using Near-Infrared Light](https://patentbrief.org/patent/us/RE38800/digital-video-recorder-dvr) — A system that uses flexible fiber optic cables to map the inside of complex body parts by shining light through them and measuring how it scatters. - [How Laser Printers Use Rotating Mirrors to Write Information](https://patentbrief.org/patent/us/3867571/laser-printer-starkweather) — A 1972 Xerox patent describing how to use a spinning mirror to scan a laser beam across a page, adjusting the speed of the data to keep the image sharp.