Classifications

• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
  • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
  • G02B26/10—Scanning systems
  • G02B26/101—Scanning systems with both horizontal and vertical deflecting means, e.g. raster or XY scanners

Definitions

• the present invention relates to a reflective system for a deflection device of a light beam, a single or multiple deflection device comprising such a reflective system, a marking installation comprising such a deflection device.
• a deflection device consisting of a galvanometric head.
• a galvanometric head comprises a motor and a mirror mounted on the motor shaft.
• a source of illumination for example a laser beam generator, illuminates the mirror, and depending on the position of the mirror, the reflected light beam will illuminate a particular location of a target.
• the mirror is free to position itself over a wide angular range, whereas when a rapid change of position of the mirror is envisaged to illuminate another part of the target, it is necessary to print important angular accelerations and decelerations at the same time. mirror.
• Such a deflection device thus functions in transient regime, which is a handicap in the case where it is necessary to quickly change the point of impact of the reflected beam.
• An object of the present invention is to provide a deflection device which does not have the drawbacks of the prior art and which in particular makes it possible to rapidly modify the position of the point of impact of the reflected beam.
• a reflective system comprising:
• a base intended to be mounted mobile in rotation around an axis of rotation
• At least two reflecting elements fixed on said base each extending over an angular sector and taking the form of a cone portion whose axis coincides with said axis of rotation, and among the plurality of reflecting elements at minus two have different half-angles at the top.
• the reflecting system further comprises at least one non-reflecting element extending over one of the angular sectors.
• the reflecting system further comprises a shaping optics arranged downstream of the reflecting elements and intended to correct the aberrations of light beams resulting from a reflection on said reflecting elements.
• the shaping optics consists, for each half-angle at the apex, of an optical component dedicated to correcting the aberrations of the light beam reflected by each reflecting element having said half-angle at the apex.
• the invention also proposes a simple deflection device comprising a reflecting system according to one of the preceding variant claims, a motor on the shaft of which said reflecting system is fixed and comprising means for detecting the angular position of said shaft, a source lighting apparatus providing a light beam for successively illuminating the reflecting elements, and a control unit for collecting the data of the angular position detecting means and controlling the switching on and off of the incident light beam as a function of those data.
• the invention also proposes a multiple deflection device comprising: a first reflecting system according to one of the preceding variants,
• a first motor on whose shaft is fixed said first reflecting system and comprising means for detecting the angular position of said shaft
• a second motor on the shaft of which said second reflecting system is fixed and comprising means for detecting the angular position of said shaft
• a light source delivering a light beam intended to illuminate successively the reflective elements of said first reflecting system
• control unit intended to collect the data of each angular position detecting means and to control the ignition and extinction of the incident light beam according to these data
• the second reflecting system being arranged in such a way that the light beams reflected by the first reflecting system are reflected successively on the reflecting elements of said second reflecting system.
• the multiple deflection device further comprises, between the first reflecting system and the second reflecting system, a conjugation optical system for positioning the point of intersection of the light beams reflected by the first reflecting system on the axis of rotation. said second reflective system.
• the optical conjugation system comprises means for transforming the plane containing the light beams reflected by the first reflecting system into another plane containing conjugated light beams, said other plane being perpendicular to the center plane of the reflecting element of the second system reflecting on which they are intended to reflect and containing said point of intersection.
• said reflecting system rotating at the speed v r successively presents two identical series of reflecting elements.
• the invention also proposes a multiple deflection device comprising:
• a first motor on the shaft of which said reflective system is fixed and comprising means for detecting the angular position of said shaft
• a galvanometric head having a mirror and a motor on the shaft of which said mirror is fixed, means for detecting the angular position of said shaft,
• a light source delivering a light beam intended to illuminate the mirror of the galvanometric head
• a control unit intended to collect the data of the angular position detection means of the reflecting system and of the angular position detection means of the galvanometric head and to control the ignition and the extinction of the incident light beam according to these data
• the reflecting system being arranged so that the light beam reflected by the galvanometric head is reflected successively on the reflecting elements of said reflecting system.
• the invention also proposes a multiple deflection device comprising:
• a first motor on the shaft of which said reflective system is fixed and comprising means for detecting the angular position of said shaft
• a galvanometric head having a mirror and a motor on the shaft of which said mirror is fixed, means for detecting the angular position of said shaft,
• a light source delivering a light beam intended to illuminate successively on the reflecting elements of said reflecting system
• control unit intended to collect the data of the angular position detection means of the reflecting system and of the angular position detection means of the galvanometric head and to control the ignition and the extinction of the incident light beam according to these data
• the mirror of the galvanometric head being arranged in such a way that the light beam reflected by the reflecting system is reflected in said mirror.
• the invention also proposes an object marking installation comprising:
• a focusing means for focusing the light beams coming out of the deflection device towards the object to be marked
• a scrolling device comprising a position detection means and intended to scroll the objects to be marked in front of the focusing means
• the marking installation further comprises an additional scanning device, such as a galvanometric head or a polygonal scanner, disposed downstream of the deflection device, and downstream or upstream of the focusing means.
• an additional scanning device such as a galvanometric head or a polygonal scanner
• FIG. 1 shows a reflective system according to the invention
• FIG. 2a shows a section of the reflecting system of FIG. 1 according to a first variant
• FIG. 2b shows a section of the reflecting system of FIG. 1 according to a second variant
• FIG. 3 shows a multiple deflection device according to the invention
• FIG. 4 shows a side view of the multiple deflection device of FIG. 3
• FIG. 5 shows a top view of the multiple deflection device of FIG.
• Figs. 6a-c show an example of scanning a matrix of points by a multiple deflection device
• FIG. 7 shows a line of a matrix obtained with a multiple deflection device according to another embodiment of the invention.
• Figs. 8 to 10 show object marking installations using a deflection device according to the invention
• FIG. 11 shows a light beam shaping optics
• FIG. 12 shows the shaping optics of FIG. 11 seen in the direction of the arrow XII of FIG. 11
• FIG. 13 shows a multiple deflection device according to another embodiment of the invention.
• FIG. 14 shows a multiple deflection device according to another embodiment of the invention.
• Fig. 1 shows a reflective system 100 for a simple deflection device.
• the simple deflection device further comprises a motor on the shaft of which is fixed the reflecting system 100 which comprises a base 101 here taking the form of a disk 101 pierced at its center with a bore 102 to fix it the tree of the motor.
• the disk 101 is thus intended to be rotatably mounted about the axis of rotation D of the engine.
• At least two reflecting elements 104 On the edge of the disk 101 are fixed at least two reflecting elements 104, each extending over an angular sector. Of the angular sectors, some or all may be equal or they may all be different.
• the simple defiexion device further comprises a light source such as a laser beam generator delivering an incident light beam whose radius is very small compared to the dimensions of the angular sectors to limit the overlap of said light beam on two reflecting elements. 104.
• a light source such as a laser beam generator delivering an incident light beam whose radius is very small compared to the dimensions of the angular sectors to limit the overlap of said light beam on two reflecting elements.
• the light beam will successively illuminate the reflecting elements 104.
• the motor preferably a DC motor, comprises means for detecting the angular position of its shaft, such as for example an encoder. Knowing the position of the motor shaft makes it possible to know the position of the reflecting system 100 and the reflecting element 104 which is illuminated.
• Each reflective element 104 takes the form of a cone portion whose axis coincides with the axis of rotation D of the disc 101 and therefore the axis of rotation of the motor and of the reflecting system 100. Thus, the reflecting surface of each reflecting element 104 remains unchanged by rotation about the axis D of the disk 101.
• FIG. 2a and FIG. 2b show sections through a plane containing the axis D of the reflecting system 100.
• Each reflecting element 104 is defined by its half-angle at the vertex which is here represented by " ⁇ ".
• At least two have different half-angles at the apex ⁇ .
• a reflective element 104 is replaced by a non-reflective element. That is, the reflective system 100 then comprises at least two reflective elements 104 and at least one non-reflective element.
• the reflective element 104 has a convex reflection surface
• the reflective element 104 has a concave reflection surface
• the reflective system 100 may comprise only convex reflection surfaces, only concave reflecting surfaces, or a mixture of both.
• the arrow 202 in the solid line corresponds to the reflection direction of the reflecting element 104 having a half-angle at the apex ⁇
• the two arrows 202 in dashed lines correspond to reflection directions of reflecting elements 104 having half-angles at the top ⁇ 'and ⁇ "different from ⁇ .
• the deflection device thus obtained makes it possible to obtain deflections of the incident light beam 200 at discrete angles, that is to say that the transition from one reflection angle to another is discontinuous.
• the different light beams 202 which are thus reflected by the different reflecting elements 104 belong to the same plane P which contains the axis D and the incident light beam 200, here the plane of the sheet.
• the angular position of the reflecting system 100 thus determines the amplitude of the deflection of the incident light beam 200.
• this marking may be used in the context of laser marking of high-speed points on an object.
• the device of the state of the art Unlike the device of the state of the art, it is no longer necessary to accelerate or slow down the engine, and it operates in steady state, and just turn on or off the incident light beam 200 for example via a flux modulator, depending on the position of the reflecting system 100 to illuminate a particular point of the target.
• the position of the reflecting system 100 is given by the means for detecting the angular position of the defiexion device.
• the defiexion device comprises a control unit intended to collect the data of the detection means and to control the ignition and extinction of the incident light beam according to these data and according to the point to be projected.
• the duration of switching from one reflection direction to another is independent of the amplitude of the angular deviation to be produced.
• the duration of the transition from one reflecting element 104 to another, when the reflecting system 100 is rotating is independent of the half-angles at the apex ⁇ of the two corresponding cones.
• This duration is related to the rotational speed of the reflecting system 100, the number of reflective elements 104, their respective angular width, the diameter of the incident light beam 200 and the distance between the point of impact of this incident light beam. 200 on the reflective element 104 and the top of the cone. It is immaterial, from a temporal point of view, to deflect the incident light beam 200 by 1 ° or 20 °.
• shaping optics can be put in place to correct these aberrations.
• Fig. 11 shows the reflecting system 100 having a shaping optics 1100 which is disposed downstream of the reflecting elements 104, and more particularly downstream of the reflection point of the incident beam 200 on the reflecting elements 104.
• Fig. 12 shows the shaping optics 1100 seen according to the arrow XII.
• the shaping optics 1 100 comprises for each half-angle at the apex, an optical component 1 102 dedicated to correcting the aberrations of the light beam reflected by each reflecting element 104 having said half-angle at Mountain peak.
• each optical component 1102 takes the form of a cylindrical or acylindrical lens of small width, having distinct optical characteristics, but it is possible to use other types of surfaces. .
• Fig. 3 shows a multiple deflection device 300 according to the invention which makes it possible to project a matrix of points 302 in a plane 304. For example, in the When marking an object, it may be necessary to mark only certain points 302 of the matrix, and to modify, for each object, the points 302 to be marked.
• FIG. 4 shows a side view of the multiple defiexion device 300 and FIG. 5 shows a top view of the multiple defiexion device 300.
• two reflecting systems 100a and 100b as described above is particularly suitable for such an application, that is to say for switching at high frequency and at certain angles.
• the multiple defiexion device 300 comprises:
• a first motor on the shaft of which the first reflecting system 100a is fixed and comprising means for detecting the angular position of the shaft
• a second motor on the shaft of which the second reflecting system 100b is fixed and comprising means for detecting the angular position of the shaft
• a light source delivering a light beam for successively illuminating the reflecting elements 104a of the first reflecting system 100a due to the rotation of the latter;
• control unit intended to collect the data of each angular position detecting means and to control the ignition and extinction of the incident light beam according to these data
• the second reflecting system 100b being arranged in such a way that the light beams reflected by the first reflecting system 100a are reflected successively on the reflecting elements 104b of the second reflecting system 100b.
• the incident light beam intersecting the axis of rotation of the first reflecting system 100a is reflected on a particular reflecting element 104a of the first reflecting system 100a, and the half-angle at the top of this particular reflecting element 104a, the light beam and reflected reflection at a particular point of a particular reflective element 104b of the second reflective system 100b, and the half-angle at the apex of this reflective element 104b, the light beam thus reflected and exiting 306 illuminates a particular point 302 of the plane 304
• the position of the point 302 thus marked depends on the half-angle at the top 9a of the first reflective system 100a and the top half-angle 9b of the second reflective system 100b.
• the two reflecting systems 100a and 100b can be dedicated to the same marking direction or they can be dedicated to two directions of reflection. different markings.
• the multiple deflection device 300 further comprises, between the first reflecting system 100a and the second reflecting system 100b, a conjugation optical system 350.
• the general function of the optical conjugation system 350 is to conjugate the common origin of the light beams reflected by the first reflecting system 100a, i.e. the point of reflection on the first reflecting system 100a, with a point on the axis of rotation of the second reflecting system 100b.
• the point corresponding to the intersection of the light beams from the optical conjugation system 350 (308, 308a and 308b, see Fig. 5) belongs to the axis of rotation of the second reflecting system 100b.
• the two reflecting systems 100a and 100b are arranged to perform deflections in two orthogonal planes in order to scan the matrix of points 302 in both directions.
• the first reflecting system 100a makes it possible to obtain a variation of the deviations in a first direction, here the horizontal direction H, and the second reflecting system 100b makes it possible to obtain a variation of the deviations in a second direction, here the vertical direction V.
• the optical conjugation system 350 changes the orientation of the light beams from the first reflecting system 100a before they reflect on the second reflecting system 100b.
• the light beam is reflected at a particular angle.
• the light beams reflected by different reflecting elements 104a will propagate at different angles.
• the plane P is here substantially the center plane of the reflecting element 104a of the first reflecting system 100a.
• the light beams thus conjugated After passing through the optical conjugation system 350, the light beams thus conjugated have an orientation that is such that they are distributed in a plane perpendicular to the center plane of the reflective element 104b of the second reflecting system 100b on which they are reflected.
• the optical conjugation system 350 thus comprises the means for transforming the plane P containing the light beams reflected by the first reflecting system 100a into another plane P '(FIG 4) containing the conjugated light beams, said other plane P' being perpendicular at the center plane of the reflective element 104b of the second reflecting system 100b on which they are provided to reflect and containing the point of intersection. This constitutes a particular function of the optical conjugation system 350 in this particular embodiment.
• references 308, 308a and 308b represent three conjugated light beams, i.e. outgoing from the optical conjugation system 350, each corresponding to a particular reflective element 104a of the first reflecting system 100a.
• the conjugated light beams 308 are thus all in the plane P 'and they have an angular distribution in this plane P' which causes a deflection in the horizontal direction of the target.
• each conjugated light beam 308, 308a, 308b targets a particular column of the dot matrix 302.
• the conjugated light beam 308, 308a, 308b is reflected on the reflective element 104b of the second reflecting system 100b which is selected, causing a deflection similar to that generated by the first reflecting system 100a, i.e. say a vertical deviation, which can target a particular line of the particular column targeted, and therefore the point 302 corresponding to that row and column.
• the lighting and extinction of the incident light beam is effected via an ignition and extinguishing device that the multiple deflection device 300 comprises for this purpose.
• an ignition and extinguishing device may be for example a flux modulator.
• Ignition and extinction of the incident light beam can illuminate all points 302 or only some of them.
• the multiple deflection device 300 of Figs. 3 to 5 makes it possible to generate a matrix of points 302 of dimensions K ⁇ L, where K corresponds to the number of reflecting elements 104a of the first reflecting system 100a and where L corresponds to the number of reflecting elements 104b of the second reflecting system 100b.
• the optical conjugation system 350 comprises a first plane mirror 352, a second mirror 354 and a focusing lens 356.
• the optical conjugation system 350 keeps the two reflecting systems 100a and 100b in the same plane and with parallel axes of rotation which facilitates the construction of the multiple defiexion device 300.
• the focusing lens 356 makes it possible to focus the conjugate beams 308, 308a and 308b, which are derived therefrom, so that the point corresponding to the intersection of these conjugated light beams 308, 308a and 308b belongs to the axis of rotation of the second reflective system 100b.
• the two planar mirrors 352 and 354 make it possible to bring the light beams above the second reflecting system 100b and thus to bring the point of intersection above the second reflecting system 100b.
• the height at which the point of intersection is located is small as long as the conjugated light beams 308, 308a and 308b are reflected on the second reflecting system 100b.
• the first mirror 352 is perpendicular to the plane P and has an inclination angle for directing the reflected light beams to a first direction which is here upward.
• the second mirror 354 has an orientation such that the reflected light beams from the first mirror 352 are directed to the focusing lens 356.
• the two mirrors 352 and 354 thus realize a folding and a rotation of the light beams, that is to say that they make it possible to carry out the particular function described above.
• the discs of the reflective systems 100a and 100b would then not be in the same plane. Indeed, the second reflecting system 100b would be placed in a position such that the deviations due to the first reflecting system 100a are in the plane P 'defined above with respect to the second reflecting system 100b.
• shaping optics 358 and 360 in accordance with those described above may be implemented downstream of the reflection points on the reflecting elements 104a and 104b of the reflectors.
• the second reflecting system 100b has L reflective elements 104b, all having the same angular width, with L different half-angles at the top 9b, it has the fastest rotation speed and it controls the defiexion vertical.
• the first reflecting system 100a has K reflective elements 104a, all having the same angular width, with K half-angles at the apex 9a different and it controls the horizontal defiexion.
• v r be the speed of rotation of the refitting system 104b fast and vi the speed of rotation of the reflective system 104a slow.
• the relation (1) corresponds to the fact that, when the fast reflective system 104b describes a lathe, the slow refitting system 104a rotates at an angle equal to the angular width of one of its reflecting elements 104a. Because of rotational invariance, the reflection angle does not vary in the horizontal direction associated with the slow indexing system 104a. In the plane of the array, the outgoing light beam 306 thus traverses all the points 302 of a particular column of the array.
• the outgoing light beam 310 traverses all the columns of the matrix, and therefore the entire matrix.
• the operation is analogous if the horizontal deflection is associated with the reflexing system 104b fast, and the vertical deflection at the refitting system 104a slow.
• a fast reflective system revolution 104b makes it possible to traverse a line of the matrix
• a latent reflexing system revolution 104a makes it possible to traverse the total matrix, but this time line by line.
• the retrieving system 100b fast presents successively two identical series of reflective elements 104b, each series comprising the same series of half-angles at the vertex 9b.
• the rapid reflexing system 100b can have 2L reflective elements 104b, divided into two identical series of L reflective elements 104b at half-angles at the vertex 9b distinct.
• the projection frequency of the matrix is doubled.
• a revolution of the 100b fast reflective system corresponds to the scrolling of two reflective elements 100a of the refieking system 100a slow, so the course of two rows or two columns of the matrix, according to the convention chosen.
• Fig. 6b shows a first refieking system 600a having four reflecting elements 1-4 all having a different apex half-angle ⁇ 1- ⁇ 4 which satisfies the relationship: ⁇ 1> ⁇ 2> ⁇ 3> ⁇ 4.
• the first refieking system 600a controls the horizontal deflection.
• the first reflective system 600a is the slow reflective system.
• Fig. 6c shows a second reflecting system 600b having four reflecting elements 1-4 all having a different half-angle at the vertex ⁇ - ⁇ '4 which satisfies the relation: ⁇ > ⁇ '2> ⁇ '3> ⁇ '4.
• the second reflective system 600b controls the vertical defiexion.
• the second reflective system 600b is the fast reflective system.
• Fig. 6a shows the scanning direction of the matrix 600c when the reflecting systems 600a and 600b are implemented in a multiple defiexion device as shown in FIG. 3.
• the relationships between the half-angles at the apex ⁇ 1- ⁇ 4 of the first reflecting system 600a determine the direction of the horizontal path
• the relations between the half-angles ⁇ - ⁇ '4 of the second reflecting system 600b determine the direction of the vertical path.
• the marking of the matrix 600c begins when the incident light beam is reflected successively on the reflecting element 1 of the first reflecting system 600a and on the reflecting element 1 of the second reflecting system 600b.
• the point (1; 1) of the matrix 600c is thus marked, if the incident beam is on.
• the point (1; 1) corresponds to the point of the first line and first column of the matrix 600c.
• the second reflecting element 2 of the second reflecting system 600b becomes active and the incident light beam is then reflected successively on the reflecting element 1 of the first reflecting system 600a and on the reflecting element 2 the second reflective system 600b.
• the point (2; 1) of the matrix 600c is thus marked, if the incident beam is on.
• the scanning is continued in the same way on the column 1 of the matrix 600c.
• the light beam has in fact traveled the angular sector corresponding to the reflecting element 1 of the first reflecting system 600a.
• Fig. 7 shows a line 700 of a matrix which has been obtained with a multiple deflection device according to another embodiment of the invention, wherein the two reflecting systems are dedicated to the same marking direction.
• the multiple deflection device comprises two reflecting systems for the or each direction supporting the large dimension.
• the multiple deflection device comprises two reflective systems for achieving horizontal deflection.
• a possible optical conjugation system can be set up between the two reflecting systems, but this optical conjugation system is intended to achieve the general function described above, but in this particular embodiment, the optical conjugation system performs another particular function which consists only in a folding of the light beams and this folding is no longer combined with a rotation.
• the optical conjugation system keeps the light beams in a plane similar to the plane P but for the second reflecting system, that is to say containing the axis of rotation of said second reflecting system.
• each reflective system has four reflective elements.
• the reflective elements of each reflective system have different half-angles at the apex.
• the first point of the line 700 is derived from the reflection of the incident beam on the first element of the slow reflective system and the first element of the fast reflective system.
• the second point of the line 700 is derived from the reflection of the incident beam on the second element of the slow reflective system and the first element of the fast reflective system.
• Fig. 8 shows a marking facility 800 for marking objects
• the 800 marking facility includes:
• focusing means 810 for focusing the outgoing light beams of the deflection device 808 towards the object 802 to be marked
• a scrolling device 812 comprising a position detection means and intended to scroll the objects 802 to be marked in front of the focusing means 810, and
• control unit intended to control the switching on and off of the incident light beam as a function of the position data collected from the angular position detection means of the deflection device 808 and of the position data collected from the detection means position of the scrolling device 812.
• the deflection device 808 includes a light source and an ignition and extinguishing device for turning on or off the incident light beam.
• the scroll device 812 is for example of the conveyor belt type, and is intended to scroll the objects 802 to be marked in front of the focusing means 810 so that it is marked by the outgoing and focused light beams.
• the deflection device 808 may be simple as described on the basis of FIG. 1 or multiple as those described on the basis of Figs. 3 to 7.
• the position detection means of the scrolling device 812 makes it possible to know which object 802 is on said scrolling device 812 and where it is with respect to the focusing means 810.
• the control unit then controls the ignition and extinguishing device according to the position data collected from the angular position detecting means of the deflection device 808 and the position data collected from the position detecting means of the deflection device 808.
• scroll device 812 for controlling the ignition and extinction of the incident light beam depending on the position of the or each reflecting system, because the corresponding point of the matrix must be marked or not and because of the presence of the object 802 to be marked in front of the focusing means 810.
• the focusing means 810 is for example an f-theta lens, designed to focus in a plane over the entire amplitude of the useful field. It is arranged to focus the beams on the surface of the objects 802 that scroll.
• the marking installation 800 makes it possible to modify, for each object 802, the points to be marked in the matrix.
• the maximum rotational speed of the fast reflective system is limited by the illumination time necessary to mark a point on the target object 802.
• the characteristics (wavelength, pulsed or continuous emission regime, power, modulation, etc.) of the light source, and in particular of the laser source, are chosen as a function of the material constituting the object 802. to score.
• the presence of the angular position detecting means makes it possible to control the speed of rotation and the position of the corresponding reflecting system, via a servo-control loop, to synchronize the different dynamic components, namely the reflective system or systems, with each other.
• other optomechanical scanning components such as galvanometric heads or polygonal scanners, the lighting source, the possible shutter of the laser beam.
• FIG. 9 and FIG. 10 show marking facilities 900 and 1000 for which the speed of the scrolling device 812 is too great and the time required for marking is too long.
• an additional scanning device 902, 1002 such as for example a galvanometric head or a polygonal scanner can be set upstream of the deflection device 808, and downstream (FIG 9) or upstream (FIG. 10) of the focusing means 810.
• the additional scanning device 902, 1002 will compensate for the continuous movement of the object during marking by moving the point of impact of the outgoing light beams simultaneously with the movement of the object. 802, so that the points are not deformed.
• Fig. 13 shows a multiple deflection device 1300 according to another embodiment of the invention for projecting a matrix of points.
• the multiple deflection device 1300 comprises:
• a first motor on the shaft of which said reflective system 1302 is fixed and comprising means for detecting the angular position of said shaft
• a galvanometric head 1304 presenting a mirror 1308 and a motor on the shaft of which said mirror 1308 is fixed, a means for detecting the angular position of said shaft,
• a light source delivering a light beam intended to illuminate the mirror 1308 of the galvanometer head 1304, and
• control unit intended to collect the data of the angular position detecting means of the reflective system 1302 and of the angular position detecting means of the galvanometric head 1304 and to control the switching on and off of the incident light beam according to of these data.
• the reflective system 1302 is arranged in such a way that the incident light beam reflected by the galvanometer head 1304 is reflected successively on the reflective elements of said reflecting system 1302.
• the incident light beam comes from a light source.
• the motor shaft of the galvanometer head 1304 coincides with the axis of rotation of the reflecting system 1302.
• the incident beam is reflected at different locations of the reflective element of the reflective system 1302, thereby generating a scan in one direction of the array.
• the other scanning direction is achieved by the reflective elements of the reflective system 1302.
• the light beam thus reflected can be intercepted by a shaping optics 1306.
• Fig. 14 shows a multiple deflection device 1400 according to another embodiment of the invention for projecting a matrix of points.
• the multiple deflection device 1400 comprises:
• a reflective system 1402 as described above, a first motor on the shaft of which said reflective system 1402 is fixed and comprising means for detecting the angular position of said shaft,
• a galvanometer head 1404 presenting a mirror 1408 and a motor on the shaft of which said mirror 1408 is fixed, a means for detecting the angular position of said shaft,
• a light source delivering a light beam intended to illuminate successively on the reflective elements of said reflecting system 1402,
• control unit intended to collect the data of the angular position detecting means of the reflecting system 1402 and of the angular position detecting means of the galvanometer head 1404 and to control the switching on and off of the incident light beam according to of these data.
• the mirror 1408 of the galvanometer head 1304 is arranged in such a way that the incident light beam reflected by the reflecting system 1302 is reflected in said mirror 1408.
• the incident light beam comes from a light source.
• the incident beam is reflected at different locations of the mirror 1408 of the galvanometer head 1404, thereby generating a scan in one direction of the array.
• the other scanning direction is achieved by the position of the mirror 1408.
• the reflected light beam can be intercepted by a shaping optics 1406.
• the scanning of a matrix consists, for example, in stopping the mirror 1308, 1408 of the galvanometric head 1304, 1404 in a particular position corresponding to a particular direction, for example to a particular column of the matrix, and then in scrolling through the reflective elements.
• the reflective system 1302, 1402 controlling the switching on or off of the incident light beam to traverse the points of said particular direction, for example the points of the particular column, and then to rotate the mirror 1308, 1408 of the head galvanometric 1304, 1404 in another particular position to point to another particular direction.
• this marking may consist of a local deformation of the object, a perforation of this object if the power of the light beam is sufficient or in one spot welding.
• a single or multiple deflection device can also be implemented in the field of biotechnology.
• the deflection device is adapted to the illumination of targets arranged in a matrix, for example for a fluorescence scanner using fluorescent markers, a LIBS scanner, etc. where the high-speed targeting of the targets makes it possible to improve the speed of the fluorescence analysis treatments and to obtain a better signal-to-noise ratio of the fluorescence signal coming from the target.
• the single or multiple deflection device can also be used in laser radars or matrix illuminators.
• the lighting and extinction of the incident light beam can be achieved by switching on and off the light source or by placing a shutter.
• the ignition and extinction device 906 may be integrated with the light source, for example in the case of a self-modulating laser source at a suitable frequency.

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• 2010
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