Devices and methods for radiation-based dermatological treatments

摘要

A hand-held device for providing laser-based dermatological treatments includes a laser beam source supported in a device body, an automated scanning system, and control electronics. The automated scanning system is configured to receive an input beam generated by the laser beam source and scan the input beam to provide a series of output beams for delivery to the skin via an application end of the device to form a pattern of treatment spots on the skin. The application end is configured for movement across the skin during a treatment session. The control electronics control the laser beam source and/or the automated scanning system to deliver the scanned output beams to the skin at a radiation intensity sufficient to provide an effective dermatological treatment, and wherein the scanned output beams delivered from the application end of the device meet the Class 1M or better eye safety classification per the IEC 60825-1.

主权项

1. A self-contained, hand-held device for providing laser-based dermatological treatments, the device comprising:
a device body configured to be handheld by a user; a laser beam source supported in the device body and configured to generate non-collimated laser radiation at a wavelength in the range of 1400-1500 nm or 1800-2600 nm; an automated scanning system configured to receive the non-collimated laser radiation; wherein along an optical path extending fully from an emitting surface of the laser beam source to the automated scanning system the device either includes no optics or only optics that deliver the laser radiation to the automated scanning system as a non-collimated input beam, wherein the automated scanning system is configured to scan the received non-collimated input beam to provide a series of automatically scanned output beams for delivery to the skin to form a pattern of treatment spots on the skin to provide a fractional treatment to the skin, wherein each treatment spot is defined by a contiguous area on the skin surface receiving at least 1/e2 times the maximum intensity of a respective output beam delivered to the skin, which maximum intensity is sufficient to cause a lesion in the skin; the automated scanning system comprising a single rotating optical element having a plurality of sectors, each configured to influence a focus of the received non-collimated input beam to define a non-collimated output beam that is convergent along a first axis by a first degree of convergence and convergent along a second, orthogonal axis by a second degree of convergence greater than the first degree of convergence; an application end arranged for delivery of the automatically scanned output beams to the skin, and configured to be manually moved across the skin during a treatment session; and electronics configured to control at least one of the laser beam source and the automated scanning system to deliver the automatically scanned output beams to the skin at a delivered fluence at the skin of at least 1 J/cm2; wherein a focus of each output beam delivered to the skin, along at least one of the first and second orthogonal axes, is defined by the single rotating optical element such that between the single rotating optical element and the skin, the device includes only an open air interface, a window, or other structure that does not deflect or influence the angular distribution profile of each output beam along the at least one of the first and second orthogonal axes; and wherein the automatically scanned output beams delivered from the application end of the device meet the Class 1M or better eye safety classification per the IEC 60825-1.