Lock-In Amplifiers are key devices in numerous instruments used in the optical sciences and in optical equipment in industry. In many experimental configurations, they represent the means to reliably detect and record very small signals that are superimposed by noise. The SENSIPLUS device integrates a frequency programmable Lock-In Amplifier and it can directly drive LEDs up to 20mA and perform synchronous demodulation of the 1st, 2nd and 3rd harmonics.

SENSIPLUS can be applied in several optical spectroscopy applications, including absorption spectroscopy, fluorescence spectroscopy, and phosphorescence spectroscopy; optical interferometry. Other applications that can be addressed are magneto-optical, electro-mechanical, and electro-optical measurements; infrared thermography; laser wavelength stabilization; and advanced microscopy.

The device in the illustration in development at Sensichips is a miniature spectrophotometer for absorption and fluorescent spectroscopy using commercial LEDs. LEDs are used both as emitters and wavelength selective detectors for cost reduction and miniaturization.

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