Method and apparatus for formation of a fictitious target in a training unit for aiming at targets

Claim 1

A training unit for aiming at targets and having an orientable line of sight, comprising means for forming the image of a fictitious target in the field of view of said unit, wherein said image-forming means comprises a screen for visual display of luminous images, means for generating target signals in order to produce target signals defining successive images of a fictitious non-pointlike target as a function of the shape and continuous relative displacement of said target at least in distance from the unit and/or in angular position with respect to the line of sight, means for causing the displacement of a luminous point on the screen by means of said signals in order to display each of the images thus defined on said screen, and means for projecting the images thus formed in the field of view of the unit, the speed of displacement of the luminous point being sufficient to ensure persistence of perception of said point throughout the time required for forming an image, said means for generating target signals comprising a computer for producing said successive images in the form of a series of linear segments and for delivering in respect of each segment three values corresponding respectively to the time derivatives of two rectangular coordinates defining the position of the luminous point and to the time of displacement of the said luminous point at a predetermined speed for describing said segment.

Claim 8

A method of formation of a fictitious target in a training unit for aiming at targets and providing an orientable line of sight, comprising producing target signals defining successive images of a fictitious non-pointlike target as a function of the shape and continuous relative displacement of said target at least in distance from the training unit and/or in angular position with respect to the line of sight; forming each successive target image thus defined by means of a luminous point displaced on a screen under the control of said target signals; and projecting the successive images thus formed in the field of view of said unit, the speed of displacement of the luminous point being sufficiently high to ensure persistence of perception of said point throughout the time required for formation of an image; each target image being defined in said target signals by a plurality of linear segments and wherein displacement of the luminous point is controlled as a function of said target signals along a linear path comprising at least the linear segments with a continuous light intensity along said segments, at least some of the linear segments being rectilinear segments, and wherein for each rectilinear segment, the target signals contain items of information in which the length of the segment is represented by the time of displacement of the luminous point at a predetermined speed for describing the segment and in which the angular slope of the segment is represented by the time derivatives of two rectangular coordinates which define the position of said luminous point.

Claim 9

A method of formation of a fictitious target in a training unit for aiming at targets and providing an orientable line of sight, comprising producing target signals defining successive images of a fictitious non-pointlike target as a function of the shape and continuous relative displacement of said target at least in distance from the training unit and/or in angular position with respect to the line of sight; forming each successive target image thus defined by means of a luminous point displaced on a screen under the control of said target signals; and projecting the successive images thus formed in the field of view of said unit, the speed of displacement of the luminous point being sufficiently high to ensure persistence of perception of said point throughout the time required for formation of an image; each target image being defined in said target signals by a plurality of linear segments and wherein displacement of the luminous point is controlled as a function of said target signals along a linear path comprising at least the linear segments with a continuous light intensity along said segments, at least some of the linear segments being rectilinear segments, and wherein for each rectilinear segment, the target signals contain items of information in which the length of the segment is represented by the time of displacement of the luminous point at a predetermined speed for describing the segment and in which the angular slope of the segment is represented by the time derivatives of two rectangular coordinates which define the position of said luminous point.