Abstract:
There is disclosed a multi-point optical waveguide sensor device and a method for generating a plurality of fluorescence signal with distinct emission wavelengths. The device includes a plurality of sensor modules with fluorescence material wherein each of the plurality of sensor modules is connected to an optical waveguide, an optical filter each connected to the sensor modules and configured for specific wavelength emission signals to pass; each of the specific wavelength emission signals are distinct from each other and each of the specific wavelength emission signals are generated by applying a specific level of electrical energy to the filter, and an optical detector configured for receiving and detecting the fluorescence signal with distinct emission wavelengths, characterized by; the electrical energy applied to the optical filter is adjusted to affect wavelength tunability of each of the specific wavelength emission signals ensuring there is no overlapping of the specific wavelength emission signals.
Abstract:
The present invention relates to an improved humidity sensor (100) with nanoporous polyimide membrane as the sensing element more particularly, to a humidity sensor and method of fabricating the humidity sensor (100) with polyimide membrane to improve sensor's response to changes in environmental humidity. One of the advantages of the present invention is that it enhances moisture absorption and desorption from the polyimide membrane to improve device response to changes in environmental humidity. Another advantage of the system and method of the present invention is that the formation of nanopores is independent of lithographic resolution. In addition, diameter of the pores can be accurately controlled as they are directly dependent on the diameter of the grown silicon nanowires which in turns is dependent on the thickness of the metal catalyst used.
Abstract:
The present invention provides a quasi-distributed optical fiber sensor for measuring a chemical component. The sensor adapted at least a linear launching optical fiber (31) at center, and a probe optical fiber (32) enclosing the linear launching optical fiber (31). The probe optical fiber contains a plurality of sensor elements (33, 34, 35), each contains a chemical component sensitive nano-material, which is formed by etching the cladding first and then coating with the chemical component sensitive nano-material.
Abstract:
The present invention relates to the field of medical devices, and in particular, measuring physiological parameters of blood based on photon density to sense concentration of partial pressure oxygen in arterial blood. One of the advantages of the present invention is that the system having an optical molecular sensitive oxygen sensor and combination with fiber optics and planar waveguide platforms have made dramatic progress in the appearance, sensitivity, selectivity, response time through direct and indirect measurement detection technique using chemical indicator. Furthermore, the system of the present invention is avoided from various types of noise and interference which creates inaccuracies. For example, electrical noise, physiological noise, and other interference can contribute to inaccurate blood flow characteristic estimates.