LighTouch Medical uses tissue modulated, near infrared Raman spectroscopy to measure blood glucose in human fingetips in vivo noninvasively. Using this proprietary and completely painless technique, LighTouch is able to measure blood glucose concentrations with accuracy and precision equal to standard fingerstick tests in the entire relevant range of blood glucose levels including below 100 mg/dl. The proposed effort pertains to the development of an external calibrator accessory. Will allow measurement of blood glucose without removing blood