Device for implementation of a temperature reference in a camera for detecting infrared radiation, and a camera comprising said device
OwnerSilvano Pieri, Monica Olivieriinventors
Life of this patent
Estimating the term…
Abstract
In an infrared-radiation detecting camera the following are provided: an optical path with at least one collimator (5) and one scanning mirror (7); infrared-radiation detecting means (11); and at least one temperature reference with a radiating surface (31A) at a controlled temperature. The temperature reference comprises a reflecting prism (17) which receives a radiation emitted by the radiating surface and reflects it in the optical path towards the detecting means (11).
Claims23
A device for implementing a temperature reference in an infrared-radiation detecting camera comprising a radiating surface (31A) which is kept at a controlled temperature, characterized by a prism (17) which receives a radiation from said radiating surface and reflects it according to a direction that is inclined with respect to said radiating surface towards a detecting optical path.
The device according to one or more of the foregoing claims, characterized in that said radiating surface is set, with respect to the reflecting surface of the prism on which the last reflection of the radiation coming from said radiating surface takes place, fully on the side of exit of the radiation from the prism.
The device according to one or more of the foregoing claims, characterized in that said prism (17) has a first entrance face (17A) through which the radiation coming from said radiating surface (31A) enters;
- a second face (17B) forming, with said first face, an angle of aperture whereby the radiation refracted by the first face (17A) is reflected by the internal surface of the second face (17B) towards the third face (17C) of said prism, said third face (17C) forming, with the second face (17B), an angle such that the radiation reflected by the internal surface of the second face (17B) towards the third face (17C) is reflected by the internal surface of the latter towards the second face at an angle such that said radiation is refracted by the second face (17B) and comes out of the prism.
The device according to one or more of the foregoing claims, characterized in that the direction of exit of the radiation reflected by said prism is approximately orthogonal to the direction of the radiation entering said prism.
The device according to one or more of the foregoing claims, characterized in that said radiating surface (31A) is housed in a container (15) integral with said prism, with an exit window (37) for said radiation emitted by the radiating surface, said window being closed by one face of said prism.
An infrared-radiation detecting camera, comprising:
- an optical path with at least one collimator (5) and one scanning mirror (7);
- infrared-radiation detecting means (11);
- and
- at least one temperature reference with a radiating surface (31A) at a controlled temperature;
- characterized in that said temperature reference comprises a reflecting prism (17) which receives a radiation emitted from said radiating surface and reflects it in the optical path towards said detecting means (11).
Dependencies are inferred from the claim text.