Device for detecting and illuminating the vasculature using an FPGA
First Claim
Patent Images
1. A laser-based vasculature illumination system comprising:
- a first laser configured to output a beam of light at an infrared wavelength configured to image subcutaneous veins;
a second laser configured to output a beam of light at a red wavelength, to be co-axially aligned with said beam of infrared light;
an x-direction mirror configured to reflect said coaxial beam of light, and to be pivotable about a first axis, in a first direction and in a second direction;
an x-direction mirror driver configured to drive said x-direction mirror to oscillate about said first axis, to cyclically reflect said coaxial beam of light in a line, in both said first and second directions;
a y-direction mirror configured to reflect said line of light received from said x-direction mirror, and to be pivotable about a second axis, in a third direction and a fourth direction;
a y-direction mirror driver configured to drive said y-direction mirror to oscillate about said second axis;
a field programmable gate array (FPGA) configured to control said x-direction mirror driver and said y-direction mirror driver to control said oscillations about said first and second axes to form a raster pattern of said red and infrared wavelengths of light;
a feedback means configured to detect a position of said x-direction mirror and said y-direction mirror, and to signal said positions to said FPGA;
a photodiode configured to receive a vasculature image formed from said infrared light of said raster pattern, said photodiode further configured to convert said vasculature image into an analog signal;
wherein said second laser driver is further configured to receive said analog signal, and to drive said red laser to project said vasculature image using said analog signal;
a line correlator configured to measure a shift in convergence between said line of light in said first direction and said second direction, for each said oscillation of said X-direction mirror;
a mirror convergence control configured to receive said measured shift in convergence from said line correlator, and to adjust said control of said first mirror driver by said FPGA, for said line in said first direction to converge with said line in said second direction.
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Abstract
A laser based vascular illumination system utilizing a FPGA for detecting vascular positions, processing an image of such vasculature positions, and projecting the image thereof onto the body of a patient.
177 Citations
20 Claims
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1. A laser-based vasculature illumination system comprising:
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a first laser configured to output a beam of light at an infrared wavelength configured to image subcutaneous veins; a second laser configured to output a beam of light at a red wavelength, to be co-axially aligned with said beam of infrared light; an x-direction mirror configured to reflect said coaxial beam of light, and to be pivotable about a first axis, in a first direction and in a second direction; an x-direction mirror driver configured to drive said x-direction mirror to oscillate about said first axis, to cyclically reflect said coaxial beam of light in a line, in both said first and second directions; a y-direction mirror configured to reflect said line of light received from said x-direction mirror, and to be pivotable about a second axis, in a third direction and a fourth direction; a y-direction mirror driver configured to drive said y-direction mirror to oscillate about said second axis; a field programmable gate array (FPGA) configured to control said x-direction mirror driver and said y-direction mirror driver to control said oscillations about said first and second axes to form a raster pattern of said red and infrared wavelengths of light; a feedback means configured to detect a position of said x-direction mirror and said y-direction mirror, and to signal said positions to said FPGA; a photodiode configured to receive a vasculature image formed from said infrared light of said raster pattern, said photodiode further configured to convert said vasculature image into an analog signal; wherein said second laser driver is further configured to receive said analog signal, and to drive said red laser to project said vasculature image using said analog signal; a line correlator configured to measure a shift in convergence between said line of light in said first direction and said second direction, for each said oscillation of said X-direction mirror; a mirror convergence control configured to receive said measured shift in convergence from said line correlator, and to adjust said control of said first mirror driver by said FPGA, for said line in said first direction to converge with said line in said second direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A laser-based vasculature illumination system comprising:
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a first laser configured to output a beam of light at an infrared wavelength configured to image subcutaneous veins; a second laser configured to output a beam of light at a red wavelength; means for scanning said infrared wavelength beam of light and said red wavelength beam of light, in a first and a second direction, for forming respective lines in said first and second directions, and for scanning said lines in a third direction and a fourth direction; a field programmable gate array (FPGA) configured to control said means for scanning to control said scanning in said first and second directions, and said scanning in said third and fourth directions, to form a raster pattern; a photodiode configured to receive a vasculature image formed from said infrared wavelength beam of light of said raster pattern, said photodiode further configured to convert said vasculature image into an analog signal; wherein said means for scanning is further configured to receive said analog signal, and to scan said vasculature image onto the patient using said red wavelength to overlay the vasculature; a line correlator configured to measure a shift in convergence between said respective lines in said first and second directions; a mirror convergence control configured to receive said measured shift in convergence from said line correlator, and to adjust said control of said means for scanning by said FPGA, for said line in said first direction to converge with said line in said second direction. - View Dependent Claims (18, 19, 20)
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Specification