Abstract: A method for applying a rupture element to a housing part of a battery cell, more particularly to a housing part provided for sealing a battery cell, includes the following steps: providing the housing part, wherein the housing part has an inner side facing the interior of the battery cell and an outer side facing the exterior of the battery cell. A hole is provided in the housing part, through which in the event of a malfunction, in which pressure in the battery cell reaches an inadmissably high level, pressure can escape into the surrounding area. A plate-shaped rupture element is provided, which is at least slightly larger than the hole. The plate-shaped rupture element is applied to the hole from the outer side such that it fully covers the hole and an edge region of the plate-shaped rupture element is joined all around to an edge region of the housing part, which extends around the hole, such that the plate-shaped rupture element fluidically seals the hole.

Abstract: A method for applying a rupture element to a housing part of a battery cell, more particularly to a housing part provided for sealing a battery cell, includes the following steps: providing the housing part, wherein the housing part has an inner side facing the interior of the battery cell and an outer side facing the exterior of the battery cell. A hole is provided in the housing part, through which in the event of a malfunction, in which pressure in the battery cell reaches an inadmissably high level, pressure can escape into the surrounding area. A plate-shaped rupture element is provided, which is at least slightly larger than the hole. The plate-shaped rupture element is applied to the hole from the outer side such that it fully covers the hole and an edge region of the plate-shaped rupture element is joined all around to an edge region of the housing part, which extends around the hole, such that the plate-shaped rupture element fluidically seals the hole.

Abstract: An astrometry system comprises an astrometry first telescope having first and second sightlines respectively corresponding to first and second fields of view and a first star detector system in a first focal plane. A first optical system combines first and second light beams from stars in the first and second fields of view and substantially parallel to the first and second sightlines and delivers them to the first star detector system. A second telescope has a third sightline substantially parallel to one of the first and second sightlines. There is a second star detector in at least one second focal plane. A second optical system collects a third light beam from the stars substantially parallel to the third sightline and delivers it to the second star detector. A processor determines the source field of view of each star detected as a function of whether it is detected either by only the first detector or conjointly by the first and second detectors.

Abstract: An astrometry system comprises an astrometry first telescope having first and second sightlines respectively corresponding to first and second fields of view and a first star detector system in a first focal plane. A first optical system combines first and second light beams from stars in the first and second fields of view and substantially parallel to the first and second sightlines and delivers them to the first star detector system. A second telescope has a third sightline substantially parallel to one of the first and second sightlines. There is a second star detector in at least one second focal plane. A second optical system collects a third light beam from the stars substantially parallel to the third sightline and delivers it to the second star detector. A processor determines the source field of view of each star detected as a function of whether it is detected either by only the first detector or conjointly by the first and second detectors.

Abstract: Light source for an optical detector of the position of a body, the latter being measured by the relative position(s) of spots of light projected by the source on a linear detection element. Said source is in the form of a flat luminous geometric figure comprising a curve (23,23',24,24') symmetrical about an axis (22). Said curve is symmetrical about an other axis (21) and has at least a first thickness (e.sub.1) on one side of a first (21) of the two axes, and at least a second thickness (e.sub.2) on the other side of said axis. Application to an optical device for measuring the angular position of a body.