Abstract: A quantum well based two-dimensional detector (1) for detecting infrared radiation which receives infrared radiation falling upon its detector surface (1a) at various angles of incidence. The detector comprises a grating arrangement for diffraction of the incident radiation. The arrangement is selected with a grating interval which varies or changes from the central part of the detector. out towards the outer parts of the detector. The variation or change in the grating interval is arranged to retain in the detection diffracted rays of the orders 1 and ?1 as active components over the whole detector surface by changing the angle values of the diffracted rays depending upon the angles of incidence of the radiation falling on various parts of the detector surface.

Abstract: In one embodiment, an antenna device includes a scanning reflector, a fixed feeder interacting with the reflector for emitting radar radiation and a detector for detecting reflector passage of at least two different predetermined scanning positions during scanning of the reflector. The antenna device also includes a timer used to determine passage times at the time of reflector passage of the scanning positions. The scanning position of the reflector is predicted at an arbitrary time on the basis of the passage times and a predetermined scanning motion of the reflector. In another embodiment, a method for determining an accurate scanning position for the scanning reflector of the antenna device is disclosed.

Abstract: The present invention relates to a method and an arrangement for launching counter-measures, such as flares and chaff. According to the invention, the counter-measures are launched in a direction obliquely forwards and upwards relative to the aircraft and a low dynamic pressure is created across the dispenser's launch openings. The arrangement comprises compartments for counter-measures which are provided with openings and are intended for launching the counter-measures in a direction obliquely forwards and upwards relative to the aircraft. The invention increases the possibilities of releasing a target and reduces the noise levels of the sounds which can occur in emptied compartments.

Abstract: An optomechanical deflector for a line display unit (3) comprises ocular and objective functions (1, 6, 6a) and also a component or components for sweep-generation (2) and image turning. Each respective sweep-generating component (2) can be positioned at a distance (B) upwards and/or to the side of one or both eye(s) (7). By means of one or more first mirror surfaces (2a), the sweep-generating component reflects incoming radiation (4) from the line display unit (3) to one or more second mirror surface(s) (5a), which form(s) part of the objective function, on a component arranged in a rotationally fixed manner. Each respective second mirror surface in turn reflects radiation (4b) towards a mirror surface (6a) or mirror surfaces forming part of the ocular function, which reproduce(s) the respective first mirror surface for the pupil(s) (7a) of the eye(s). In an alternative embodiment, the sweep-generating component and the rotationally fixed component have changed places.