Scanned Laser Vein Contrast Enhancer with Scanning Correlated to Target Distance

An imaging device, for use in imaging subcutaneous veins beneath a target, said imaging device comprising:

• a first laser, said first laser configured to emit a beam of light comprising a selective wavelength;
• a scanner configured to scan said light from said first laser onto the target in a pattern;
• one or more photo detectors, said one or more photo detectors being responsive to said selective wavelength of light, and being configured to receive said selective wavelength of light after being reflected from the target, said reflected selective wavelength of light creating a contrasted image formed by differential amounts of absorption and reflection of said scanned selective wavelength of light by blood in the subcutaneous veins and surrounding tissue;
• wherein said selective wavelength of light emitted by said first laser is amplitude modulated;
• a filter circuit, said filter circuit configured to differentiate and filter said reflection from the target of said amplitude modulated selective wavelength of light of said contrasted image, from other non-modulated light at said selective wavelength detected by said one or more photodetectors;
• said filter circuit configured to output said filtered contrasted image;
• a second laser, said second laser configured to emit a beam of visible light, said second laser being further configured to receive and use said filtered contrasted image, with said scanner, to project said filtered contrasted image onto the target using said visible wavelength of light.

An imaging device, for use in imaging subcutaneous veins beneath a target, said imaging device comprising:

• a first laser, said first laser configured to emit a beam of light comprising a selective wavelength;
• a second laser, said second laser configured to emit a beam of visible light;
• wherein said selective wavelength of light emitted by said first laser is frequency modulated at a first frequency;
• wherein said visible wavelength of light emitted by said second laser is frequency modulated at a second frequency;
• a scanner configured to scan said light from said first and second lasers onto the target in a pattern;
• wherein said selective wavelength of light is reflected from the target as a contrasted image formed by differential amounts of absorption and reflection of said scanned selective wavelength of light by blood in the subcutaneous veins and surrounding tissue;
• one or more photo detectors, said one or more photo detectors configured to detect light;
• a band pass circuit, said band pass circuit configured to differentiate and filter said frequency modulated light at a first frequency, being a contrasted vein image, from other received light modulated at other frequencies;
• said band pass filter circuit configured to output said filtered contrasted image;
• wherein said second laser is further configured to receive and use said filtered contrasted image, with said scanner, to project said filtered contrasted image onto the target using said visible wavelength of light.

An imaging device, for use in imaging subcutaneous veins beneath a target, said imaging device comprising:

• a first laser, said first laser configured to emit a beam of light comprising a selective wavelength;
• a second laser, said second laser configured to emit a beam of visible light;
• a scanner configured to repeatedly scan said light from said first and second lasers onto the target in a pattern;
• a photo detector, said photo detector being responsive to said selective wavelength of light, and being configured to receive said selective wavelength of light after being reflected from the target, said reflected selective wavelength of light creating a contrasted image formed by differential amounts of absorption and reflection of said scanned selective wavelength of light by blood in the subcutaneous veins and surrounding tissue;
• said photo detector configured to output a representation of said contrasted image for each said scan by said scanner;
• a memory, said memory configured to receive and store a sequential plurality of each said representation of said contrasted image output by said photo detector;
• a microprocessor, said microprocessor configured to receive said sequential plurality of contrasted images from said memory, and to produce an averaged image with greater resolution;
• wherein said second laser is further configured to receive and use said averaged image, with said scanner, to project said averaged image onto the target using said visible light.