摘要:
The present invention relates to a method of and a system for detecting errors in harmonizing an optical instrument (1) with a reference direction (V—V). According to the invention, the reference direction (V—V) is materialized by a reference light beam (17) and the latter is directed onto an optoelectronic detector (3) disposed in the focal plane (2) via an invariant system (10) and an a focal system (6).
摘要:
Optical sensors, more particularly infrared sensors, use an array of MEM micromirrors to chop a light beam impinging on an array of sensors of an imaging device to minimize the influence of thermal noise. The array of micromirrors preferably switches the beam impinging on the array of sensors between an image to be analyzed and an image of a reference black body at a clearly defined temperature. These sensors are not cooled and require no cryogenic devices.
摘要:
An imaging system comprises an active display and a flexible eyecup made of a light-proof material, arranged around the active display and intended to eliminate the leakages of light between the active display and an observer. The imaging system comprises: pumping means capable of creating an air pressure difference between the inside and the outside of the eyecup, means for switching on the active display when a threshold pressure difference, called switching-on pressure Pa, is reached between the inside and the outside of the eyecup.
摘要:
An imaging system comprises an active display and a flexible eyecup made of a light-proof material, arranged around the active display and intended to eliminate the leakages of light between the active display and an observer. The imaging system comprises: pumping means capable of creating an air pressure difference between the inside and the outside of the eyecup, means for switching on the active display when a threshold pressure difference, called switching-on pressure Pa, is reached between the inside and the outside of the eyecup.
摘要:
Optical surface reflector, for a spacecraft such as a geostationary satellite.The exterior surface (10) of the reflector comprises a plurality of facets (14) inclined to each other and to the interior surface (12) of the reflector. The facets (14) advantageously form a pyramid with a square base in which the angle at the apex is equal to 90°. However, other arrangements are possible without departing from the scope of the invention. The invention increases radiative capacity without significantly increasing mass and overall size.
摘要:
Optical surface reflector, for a spacecraft such as a geostationary satellite. The exterior surface (10) of the reflector comprises a plurality of facets (14) inclined to each other and to the interior surface (12) of the reflector. The facets (14) advantageously form a pyramid with a square base in which the angle at the apex is equal to 90°. However, other arrangements are possible without departing from the scope of the invention. The invention increases radiative capacity without significantly increasing mass and overall size.