proximity sensor 220 and the main electronics 260 may be seen in fig7 although the vein enhancer of the present invention may be configured to operate in a multitude of ways it includes at least one laser one photo diode and at least one mirror depending on the desired output and or operating costs additional components may be incorporated into the design of the present invention two embodiments that have been found useful in the vein enhancement art will now be discussed a discussion of alternative embodiments will follow both embodiments implement 2 photo diodes hereinafter pds and at least two lasers in addition depending on the desired result there can be a polarization film 270 as seen in fig8 placed on the pd thus further reducing specular reflection this works particularly well with embodiments of the present invention which include a 740 nm laser and a broad spectrum pd regarding the first embodiment it is necessary to co axially align the two lasers co axially aligning the two lasers can be achieved in a multitude of ways two methods that have proven to be effective include implementing either a dielectric mirror or a polarizer the first configuration includes a.