Abstract: This optical detector unit is a hybrid unit operating in a given wavelength range and includes, superposed, a first optical detector comprising detecting elements formed in a semiconductor structure, each detecting element being intended for converting a flux of incident photons into an electrical signal; and a first read out circuit, for reading the electrical signal from each detecting element. The optical detector unit furthermore has an imaging system with a second optical detector intended for increasing the operating wavelength range of the optical detector unit and a second read out circuit for reading the electrical signals from the detecting elements of the second optical detector. The first and second read out circuit are integrated together, so as to form a common read out circuit.

Abstract: An optronic porthole comprises a substrate with two faces. It comprises on one of the faces of the substrate or on both faces, a stack of several hetero-structures, each hetero-structure being composed of at least two semi-conducting layers SC1, SC2, the layer SC1 being doped, the layer SC2 itself comprising a two-dimensional electron gas layer formed at the interface with the layer SC1. It furthermore comprises an electrode in contact with all the electron gas layers, a bi-periodic metallic grid buried in the stack, in contact with the electrode. The substrate and the layers are transparent in the 0.4 ?m-5 ?m band.

Abstract: This optical detector unit is a hybrid unit operating in a given wavelength range and includes, superposed, a first optical detector comprising detecting elements formed in a semiconductor structure, each detecting element being intended for converting a flux of incident photons into an electrical signal; and a first read out circuit, for reading the electrical signal from each detecting element. The optical detector unit furthermore has an imaging system with a second optical detector intended for increasing the operating wavelength range of the optical detector unit and a second read out circuit for reading the electrical signals from the detecting elements of the second optical detector. The first and second read out circuit are integrated together, so as to form a common read out circuit.

Abstract: An optronic porthole comprises a substrate with two faces. It comprises on one of the faces of the substrate or on both faces, a stack of several hetero-structures, each hetero-structure being composed of at least two semi-conducting layers SC1, SC2, the layer SC1 being doped, the layer SC2 itself comprising a two-dimensional electron gas layer formed at the interface with the layer SC1. It furthermore comprises an electrode in contact with all the electron gas layers, a bi-periodic metallic grid buried in the stack, in contact with the electrode. The substrate and the layers are transparent in the 0.4 ?m-5 ?m band.

Abstract: An imagery system for a biochip (10) which comprises an approximately plane support, and a plurality of spots on an upper face (11), on which biochemical elements (12) are arranged, comprises a source (20) of a light beam to illuminate said upper face of the biochip and a device (30) for detecting radiation emitted by said upper face. The source and/or the detection device have good selectivity at at least one wavelength of interest (?i) within an ultraviolet radiation band. The biochip support has a reflectivity or transmission coefficient at said wavelength of interest for which the lower limit is of the order of 10 percent.