Patent ID: 8706200

Claim:
A portable handheld vein enhancing device, for use in imaging one or more subcutaneous blood vessels of a target surface, said portable handheld vein enhancing device comprising: a laser configured to alternately emit a first wavelength of light and a second wavelength of light within a single beam, said second wavelength of light being a visible wavelength of light; one or more movable mirrors configured to receive said beam of light from said laser and to selectively move to cause said beam of light to be transmitted onto the target surface in a pattern; one or more photo detectors configured to detect said first wavelength of light after being reflected from the target surface as a contrasted image formed by differential amounts of absorption and reflection between the one or more subcutaneous blood vessels and the surrounding tissue therein; said one or more photo detectors further configured to output a signal representing said contrasted image; and wherein said laser is configured to be responsive to said signal outputted by said one or more photo detectors, and to project said contrasted image onto the target surface using said alternately emitted second wavelength of light, with a visually imperceptible offset between said emission of said first wavelength of light in said beam and said projection of said contrasted image using said second wavelength of light, to be in-focus on the target surface to overlay the one or more subcutaneous blood vessels therein, regardless of a distance of said device from the target surface.