I would like to make an electronic “finger” so to speak that will be able to use two LED’s at the tip (one Red 660nm and one IR 940nm) this is to project IR and Red light signals that can be read by a standard off the shelf pulse oximeter.
For those that are not familiar with pulse oximetry here is a link with some information:
The problem is in normal pulse oximetry the Hemoglobin acts as filter that absorbs some of the incoming light. I need to make a circuit that simulates this filtration varying the light being sent out of the finger to the pulse oximeters light sensor.
I have attached a CRUDE drawing of what I am trying to accomplish.
Thanks in advance