Commissariat a L'energie Atomique

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Patrick Agnese

Olivier Savry

Patrice Rey

Francedillaois Marion

Jean-Michel Sajer

The invention relates to a bolometric detector comprising a receiving antenna () for collecting electromagnetic waves and a resistive load for converting the power of electromagnetic waves into heating power. The resistive load is the load resistor of the antenna. The invention is more particularly applied to the detection of objects in 'all-weather' conditions (rain, fog, smoke, etc).

Bolometric detector with an antenna

Bolometric detection device with antenna and optimized cavity for millimetric or sub-millimetric electromagnetic waves, and manufacturing process for this device. This device, preferably made from a double type substrate, is applicable particularly in astrophysics and comprises at least one bolometer comprising an antenna (), a resistive load (), a thermometric element () and a resonant cavity (), surrounded by a material with optical index n. The thickness of the cavity is less than &#x3bb;/(4n), where &#x3bb; is the average wavelength of the waves to be detected.

Bolometric detection device with antenna and optimized cavity for millimetric or sub-millimetric electromagnetic waves, and manufacturing process for this device

The bolometric detector comprises at least one receiver antenna designed to collect electromagnetic waves. The antenna is extended by a resistive load converting the power from the electromagnetic waves into calorific power. Said resistive load is in contact with a thermometric element detecting the temperature rise relating to the calorific power generated. A switch arranged between the antenna and the resistive load enables the current flow between the antenna and the resistive load to be modulated by means of control means. The switch can for example be a micro-device with a bimetal effect thermal actuator.

Bolometric detector with antenna comprising a switch and imagery device comprising same

A photodetection device including at least one element incorporating a radiation absorption layer and an unabsorbed radiation reflection layer. The absorbing layer creates a first phase shift of the reflected radiation compared with the incident radiation. According to the invention, between the absorbing layer and the reflecting layer a layer is provided creating a second phase shift, which compensates the first phase shift for obtaining a substantially flat spectral response of the device.

Photodetection device, process for the production of this device and

A bolometric detection device for millimeter or sub-millimeter waves and a method for manufacturing this device. According to the invention, at least one bolometer (8) is formed on a support (6) which is transparent to the waves to be detected, each bolometer including a reflecting resonant cavity (10), a grid (12) thermally insulated from the support and positioned above the cavity, regular conductor patterns (14) which are formed on the grid and whose electrical impedance is matched to that of the void, and a thermometer (16) integral with the grid.

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Grenoble, France

Patrick Agnese