Critical angle sensor

Details Critical angle sensor Critical angle sensor

1997-10-01

2000-08-01

Rosenberger, Richard A.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

G01N 2141

Patent

active

060974796

ABSTRACT:
Disclosed is an integrated miniaturized biochemical sensor (50) which can be used to make critical angle measurements resulting from the differences in refractive index between the sensor's housing (55) and a given sample (40). In one embodiment, the sensor includes a device platform (111) over which an encapsulating and light transmissive housing (115) is formed to enclose the various sensor components including a light source (105), and a photodetector (107), a signal processing unit (95) and a temperature sensor (95). In another embodiment the housing (115) has a reflective mirrored surface (119) which focuses the light (117) from the light source (105) onto a sensing surface (121) which is in interact with the sample (40) of interest. Light incident from the sensing surface (121) is directed at the photodetector (107,159) which may be an array or single cell. A temperature sensor (95) may also be included and coupled to the platform (111).

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Melendez, Jose, et al., "A Commercial Solution for Surface Plasmon Sensing", Sixth International Meeting on Chemical Sensors, Gaithersburg, MD, USA, Jul. 22-25 1996; Sensors and Actuators B (Chemical), vol. B35, No. 1-3, ISSN 0925-4005, Elsevier, Switzerland, Sep., 1996, pp. 212-216.

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