Optical module for a light-emitting system for a motor vehicle

Abstract

The invention relates to an optical module (1) for a light-emitting system (10) for a motor vehicle, comprising: at least one light source (2); a one-piece primary optical system (4) comprising at least one primary optical member (5), said primary optical member being arranged to form a primary image from said light source; a mask (7) placed downstream of said primary optical member and having at least one opaque zone (71) and a window (72) formed in the opaque zone, said window being arranged facing said primary optical member so as to form a secondary image from the primary image, a segment (54) of the one-piece primary optical system extending through said window; and a projecting optical system (8) arranged to project, onto the ground, the secondary image formed by the mask.

Description

Optical module of a lighting system of a motor vehicle

[0001] The invention relates to the field of lighting systems for motor vehicles. More specifically, the invention relates to an optical module for a lighting system of a motor vehicle.

[0002] In the field of automotive lighting and light signaling, it is known to perform, in addition to conventional functions, functions of projecting logos or light patterns onto the ground, in the field close to the vehicle. This type of function can, for example, intervene in the context of driving assistance, for example by producing a road marking to materialize a traffic lane. This type of function can also intervene in support of a conventional signaling function, in order to warn another road user of a change of trajectory.

[0003] In order to project the luminous pattern or logo onto the ground, a known solution consists of introducing dark areas into a pixelated light beam emitted by a lighting system of the motor vehicle, the driver or road user thus visualizing the pattern or logo by contrast between dark areas and illuminated areas. However, this solution requires the light beam to have a particularly high resolution and therefore requires a particularly high number of light sources, which makes the lighting system expensive and complex.

[0004] Another known solution consists of collecting light emitted by several light sources, via light guides, then projecting images of the output faces of these light guides onto the ground, via an optical projection system. While this solution is satisfactory from an efficiency and simplicity point of view, it does not, however, allow complex patterns to be formed on the ground without increasing the number of light sources and light guides. Furthermore, the sharpness of the patterns that are projected onto the ground may be reduced, due to the complexity of producing the light guides by injection of plastic material and the presence of an optical output member to which all the light guides are connected in order to allow their integration into an optical module and the thickness of which may thus impact the optical performance of this optical module.

[0005] Another known solution consists of adding to the previous solution an opaque mask provided with windows or transparent zones, making it possible to form, from the images formed by the guides, new images, which are projected by an optical projection system. This solution, however, requires the use of an additional optical part, and therefore increases the dimensions, cost and complexity of producing the optical module. In addition, although the light guides make it possible to obtain light beams with a reduced aperture, this aperture remains wider than the dimensions of the windows or transparent zones of the mask, so that a significant part of the light emitted by the light sources is intercepted by the mask, which significantly reduces the efficiency of the module.And it is not possible to reduce the dimensions of the light guides, in particular to adapt to a short focal length and / or a high resolution, due to the complexity of producing these light guides when manufacturing by material injection is desired. Finally, in the case where the mask is made of glass, Fresnel reflections can occur between the mask and the output of the light guides, or even between the mask and an optical system provided downstream of the mask, which further reduces the efficiency of the module.

[0006] There is therefore a need for a compact optical module, capable of effectively projecting a luminous pattern or logo onto the ground, which makes it possible to create a complex pattern from a single light source, such as for example a pattern comprising details within this pattern or a pattern composed of several separate sub-patterns, and / or which makes it possible to improve the sharpness of the pattern projected onto the ground.

[0007] The present invention is placed in this context and aims to meet these needs.

[0008] For these purposes, the subject of the invention is an optical module of a lighting system of a motor vehicle, comprising: at least one light source; a single-piece primary optical system comprising at least one primary optical member, said primary optical member being arranged to form a primary image from said light source; a mask arranged downstream of said primary optical member and having at least one opaque zone and a window formed in the opaque zone, said window being arranged opposite said primary optical member to form a secondary image from the primary image, a portion of the single-piece primary optical system extending through the window; a projection optical system arranged to project onto the ground the secondary image formed by the mask.

[0009] In the invention, the light rays emitted by the light source are deflected by the primary optical member to form a primary image. This may be a virtual image or a real image, which may substantially correspond to an enlargement of the image of the emission surface of the light source or, on the contrary, be a distorted image of this emission surface. It will be noted that the majority of the light rays emitted by the light source, or even almost all of them, can thus be collected by the primary optical member to form the primary image. It is also understood that, because a part of the primary optical system passes through the mask, the mask can be positioned as close as possible to the area of ​​the primary optical member at which this primary image is formed. This improves the efficiency and compactness of the optical module.The light rays can thus pass through the window of the mask, so that the primary image is transformed by the mask into a secondary image. The window can thus delimit an outline or a pattern in the primary image to form the secondary image. This secondary image, or a combination of the primary image and the secondary image, can thus be projected onto the ground by the optical projection system. The fact that it is the secondary image which is projected by the optical projection system makes it possible in particular to obtain a pattern on the ground whose outlines have satisfactory sharpness, independently of the manufacturing quality of the primary optical member.

[0010] In the present invention, the light pattern formed by the projection of the secondary image on the ground by the optical projection system can form a logo, a pictogram, a geometric pattern or a set of several logos, pictograms or geometric patterns as well as their combination, such as for example a pictogram associated with one or more geometric patterns.

[0011] In the invention, the term opaque zone means an area capable of intercepting a ray of light and completely preventing the transmission of this ray of light through the mask. The mask may advantageously be formed by a thin plate made of an opaque material and provided with slots or cutouts allowing the window(s) to be made.

[0012] Advantageously, the or each window is arranged opposite the primary optical member to delimit, partially or totally, an outline of the primary image and / or to delimit a pattern within the primary image, for example by delimiting an outline of said pattern by means of an opaque zone partially or totally surrounding a window or by delimiting said pattern negatively by means of an opaque zone arranged within a window. In other words, the delimited outline of the primary image and / or the delimited pattern within the primary image thus defines the secondary image.

[0013] In one embodiment of the invention, the primary optical system may be produced by overmolding at least one material onto the mask. In other words, when overmolding the primary optical system, material penetrates into the or each window of the mask. In this case, it is ensured that the mask can be placed as close as possible to the area of ​​the primary optical member at which the primary image is formed, the secondary image thus forming at the level of the primary image. The primary optical system may be produced by overmolding the same polymer or several polymers of the same index. By "same polymer" is meant that the primary optical members and the output optical member are made of materials at least derived from the same base polymer, for example polycarbonate (or PC) or PMMA or silicone. However, these materials may have different fillers.

[0014] Advantageously, the optical projection system has a focal surface passing substantially through the mask or located substantially between the primary optical member and the mask. For example, said focal surface may be a plane or a curved surface located substantially at a downstream wall of the mask. In the case where the secondary image is completely delimited by the mask, it will thus be possible to provide an optical projection system focused on the mask so that this secondary image is projected onto the ground with clear edges. In the case where the secondary image is delimited by the mask and by the primary optical member, it will thus be possible to provide an optical projection system focused at the junction between the primary optical member and the mask so that this optical projection system projects onto the ground a combination of the primary image and the secondary image, this combination having clear edges.

[0015] Preferably, the projection optical system and the mask are arranged so that the secondary image projected onto the ground by the projection optical system is entirely delimited by substantially sharp edges.

[0016] In the invention, the term "substantially clear edge of an image projected on the ground" means that the variation in illumination on the ground, caused by this projection, between two points located on either side of this edge in a direction substantially perpendicular to the edge and separated by at least 1 cm has a slope, in particular at at least one point, greater than or equal to 10 lux / cm.

[0017] In an exemplary embodiment of the invention, the optical projection system is arranged to project the secondary images onto the ground in a field close to the vehicle. Near field is understood to mean a projection distance of less than 10 meters, in particular less than 5 meters and / or an overall projection direction forming an angle of at least 5° below the horizontal, in particular at least 10° below the horizontal. These images can thus participate in the realization of a function of indicating a trajectory taken by the vehicle, and in particular of the direction indicator type or of the reversing light type.

[0018] It may be provided that the optical module comprises a single primary optical element.

[0019] In an alternative embodiment of the invention, the optical module comprises a plurality of selectively controllable light sources. Where appropriate, the single-piece primary optical system comprises a plurality of primary optical members, each primary optical member is arranged to form a primary image from one of said light sources, and the mask comprises a plurality of windows each arranged opposite one of the primary optical members to form a secondary image from the primary image formed by this primary optical member; a portion of the single-piece primary optical system extending through each of the windows.

[0020] Advantageously, the primary optical members are arranged in a matrix manner. In other words, the primary optical members are arranged adjacent to each other, to form rows and columns, in particular so that the input and output faces are organized in a matrix manner while being spaced from each other by a constant pitch.

[0021] In one embodiment of the invention, the primary optical system comprises an output optical member, said primary optical member comprising a light entry face opposite which said light source is arranged and a junction face connecting the primary optical member to said portion extending through said window, said portion being connected to the output optical member. In other words, said portion forms a connecting portion between the primary optical member and the output optical member.

[0022] It is understood that, in this embodiment, the primary optical system is a single-piece part overmolded onto the mask, which extends between the junction face of the primary optical member and the output optical member, being attached to the junction face of the primary optical member and to an upstream face of the output optical member. This improves the efficiency and opacity of the optical module.

[0023] In particular, it may be provided that the optical output member defines a receptacle, in said upstream face, within which the mask extends.

[0024] Advantageously, the optical output member has an output face that is substantially in the shape of a smooth dome. For example, the optical output member may be a portion of a truncated ball or, alternatively, a portion of a truncated cylinder. This characteristic makes it possible to provide the optical output member with a function for correcting geometric aberrations introduced by the optical projection system during the projection onto the ground of said images of the junction faces.

[0025] Where appropriate, it may be provided that the junction face of the primary optical member, or even of each primary optical member, and an upstream face of the mask extend substantially in the same plane.

[0026] In one embodiment of the invention, said primary optical member comprises a primary light guide, the input face of said light guide being connected to the junction face of said light guide by an envelope such that each point of the contour of the input face is connected to a point of the contour of the junction face by a straight line.

[0027] According to this feature, the light emitted by a light source through the input face of a primary light guide can propagate in this primary light guide by total internal reflection on the walls of the light guide until it reaches the junction face. The fact that the envelope is a developable surface makes it possible to form, at the junction face, a pattern entirely delimited by substantially sharp edges, which pattern forms the primary image and can then be transformed by the mask.

[0028] For example, the input face of the or each primary light guide may be substantially rectangular, and the junction face of the or each primary light guide may have a shape substantially different from that of the input face of said primary light guide, and in particular from those of the output faces of the other primary light guides. Alternatively, for example in the case of a matrix arrangement, the input faces of the primary light guides may all be identical and the output faces of the primary light guides may all be identical.

[0029] Preferably, the optical projection system has a focal surface passing substantially through the junction face of said primary optical member with the portion.

[0030] According to an exemplary embodiment of the invention, the primary optical system comprises a plurality of primary optical members connected to the output optical member by connecting portions, such that the junction faces of at least two adjacent primary optical members, as well as the connecting portions connected to these junction faces, are spaced from one another.

[0031] According to an exemplary embodiment of the invention, the optical module comprises at least two light sources each arranged opposite an input face of one of the primary optical members specific to it. It may be provided that the number of light sources is less than the number of primary optical members, one or more primary optical members then being devoid of a light source. Alternatively, it may be provided that at least one light source is arranged opposite the input face of each primary optical member. It should be noted that this characteristic thus makes it possible to define a standard primary optical element, usable regardless of the overall pattern that one wishes to project onto the ground, and that only the number of sources and the profile and the number of zones of the mask are then defined as a function of this overall pattern. At least one of the patterns of this overall pattern will then be defined by the mask.

[0032] Where appropriate, the mask comprises a plurality of windows, each crossed by one of the connecting portions, the mask extending between the junction faces and the optical output member.

[0033] In another embodiment of the invention, the primary optical system may be devoid of an output optical member provided downstream of the mask. In this case, the primary optical system will comprise only one or more primary optical members arranged upstream of the mask, a portion of the primary optical system extending from each primary optical member through a window of the mask to define a light output face of the primary optical system.

[0034] Preferably, the light source or each selectively controllable light source comprises a light-emitting semiconductor chip, in particular a light-emitting diode. Still preferably, each selectively controllable light source is capable of emitting white light. Alternatively, each selectively controllable light source is capable of emitting amber light. As a further alternative, each selectively controllable light source is capable of emitting light whose color is controllable.

[0035] Advantageously, the optical projection system comprises at least one lens and / or one reflector and / or a combination of at least one lens and at least one reflector.

[0036] Preferably, the optical projection system may comprise a single projection lens whose focal surface passes substantially through the mask. Alternatively, the optical projection system may comprise a substantially flat mirror arranged to form virtual images of said secondary image on one side of this substantially flat mirror and a projection lens located on the other side of this substantially flat mirror and whose focal surface passes substantially through these virtual images. This type of optical projection system makes it possible to significantly reduce the size of the optical module.

[0037] The invention also relates to a lighting system for a motor vehicle, comprising an optical module according to the invention.

[0038] Advantageously, the lighting system may comprise a unit for controlling the light sources of said optical module.

[0039] For example, said lighting system may comprise a lighting device of the rear light type of a motor vehicle, and / or a front headlight of a motor vehicle, and / or a lighting device arranged in a bumper of a motor vehicle and / or in a rearview mirror of a motor vehicle, the optical module being arranged in this lighting device.

[0040] Advantageously, the control unit is capable of selectively controlling each of the light sources of said optical module according to an instruction received from a computer of the motor vehicle.

[0041] For example, the control unit may be arranged, as a function of a first instruction received from a computer of the motor vehicle, to control the emission of light by a first group of light sources of the optical module and, as a function of a second instruction received from a computer of the motor vehicle, to control the emission of light by a second group of light sources of the optical module, the second group comprising at least one light source not belonging to the first group.

[0042] According to one example, the lighting system may comprise an additional optical module comprising at least one additional light source and capable of emitting a signaling light beam, in particular a regulatory one, and the control unit may be arranged, according to an instruction received from a computer of the motor vehicle, to synchronously control said additional light source of the additional optical module and said light sources of the optical module.

[0043] The present invention is now described using examples which are purely illustrative and in no way limitative of the scope of the invention, and from the appended drawings, drawings in which the various figures represent:

[0044] represents, schematically and partially, a sectional view of an optical module according to an embodiment of the invention;

[0045] represents, schematically and partially, a perspective view of a mask of the module of the;

[0046] represents, schematically and partially, a perspective view of the primary optical element of the module of the; and

[0047] represents, schematically and partially, a lighting system of a motor vehicle according to an embodiment of the invention and incorporating the optical module of the.

[0048] In the following description, elements which are identical, by structure or by function, appearing in different figures retain, unless otherwise specified, the same references.

[0049] An optical module 1 of a lighting system of a motor vehicle according to a first embodiment of the invention is shown.

[0050] The optical module 1 comprises a plurality of light-emitting diodes 2 mounted on the same printed circuit board 3. In the example described, the optical module 1 comprises three LEDs 2, each of which can be controlled independently of the others to emit yellow or amber light.

[0051] The optical module 1 comprises a primary optical system 4, formed in a single-piece optical part 4 arranged downstream of the light-emitting diodes 2. This primary optical system 4 will be described in connection with and which show this part 4 in a rear perspective view.

[0052] The primary optical system 4 comprises a plurality of primary optical members 5 and an output optical member 6 to which these primary optical members 5 are connected. In the example described, the primary optical element 4 comprises nine primary optical members 5, each produced in the form of a light guide. The primary optical members 5 are arranged in a matrix manner, being distributed over three rows and three columns.

[0053] The optical module comprises a mask 7 arranged within the single-piece part 4, downstream of the primary optical members 5. In the example described, the mask 7 is formed by a plate 71 made of an opaque material, in which holes have been made, each defining a window 72 of predetermined shape. This mask has been shown in perspective in. It will be noted that the profiles of each window 72 may be distinct from each other.

[0054] The primary optical system 4 is a single piece, the light guides 5 and the output optical member 6 being made of the same material, namely polycarbonate or PC or silicone. In the example described, the primary optical system 4 was produced by overmolding this material onto the mask 7. During the overmolding, material thus penetrated the windows 72 of the mask 7 to define portions 54 each connecting one of the light guides 5 to the output optical member 6.In other words, the refractive indices of the light guides 5, the portions 54 and the output optical member 6 are identical, and there are no diopters at the junctions of these different parts of the primary optical system 4, so that the light passing through the primary optical system 4 from the light guides 5 to the output optical member 6 does not undergo any deviation, in particular no reflection at these junctions, which makes it possible to increase the efficiency of the optical module by 10%.

[0055] Each light guide 5 comprises an entry face 51, opposite which one of the LEDs 2 is arranged, the light capable of being emitted by this LED 2 thus penetrating into the light guide 5 via this entry face 51.

[0056] Each light guide 5 is connected to one of the portions 54 by a junction face 52, opposite the entry face 51, and located at an upstream wall of the mask 7. More precisely, the primary optical system 4 has been overmolded on the mask 7 so that the junction faces 52 and the upstream wall of the mask 7 extend in the same plane.

[0057] For each light guide 5, the input face 51 is connected to the junction face 52 by an envelope 53. This envelope 53 is a developable surface, such that each point of the contour of the input face 51 is connected, via the envelope 53, to a point of the contour of the junction face 52 by a straight line. The light capable of being emitted by the LED 2 located opposite the input face 51 is thus coupled to the light guide 5, when it enters this light guide 5 via this input face 51, and propagates by successive total internal reflections against the envelope 53 until reaching the junction face 52, via which it is decoupled from the light guide 5 and enters the portion 54 then into the output optical member 6. The junction face 52 thus forms a fictitious output face of the light guide 5.

[0058] The junction face 52 of a light guide 5 thus defines, thanks to its contour, a pattern whose shape is predetermined and specific to this light guide 5. The shape of the input face 51 and the envelope 53 of each light guide 5 thus makes it possible to exploit all the light emitted by an LED 2 through the input face 51 to obtain at the junction face 52 a pattern entirely delimited by substantially sharp edges. Similarly, the shape of the input face 51 and the envelope 53 make it possible to obtain a homogeneous light distribution inside this pattern, at the junction face 52.

[0059] In other words, each light guide 5 is arranged to form an image, called a primary image, from the light source 2 arranged opposite its input face 51, at its junction face 52, and therefore at the upstream face of the mask 7. The edges of each primary image are defined by the edges of each junction face 52. Furthermore, the light guides 5 are arranged so that two adjacent junction faces 52 are spaced apart.

[0060] It will be noted that in the example of 1a, the input faces 51 are all similar, as are the junction faces 52. In other words, the primary image obtained at the junction face 52 of a light guide 5 is identical for all the light guides 5, regardless of their positions in the matrix. It is thus possible to obtain, at the mask 7, a matrix of primary images identical to each other. Only the presence or absence of an LED opposite the input faces 51 and / or the activation or deactivation of the LEDs provided opposite the input faces 51 define this matrix of primary images. Thus, in the example of 1a, only seven LEDs have been provided. In other words, two light guides 5 are devoid of a light source at their input face 51.

[0061] Other shapes than those described could be conceived, and in particular shapes of a semicircle, a diamond or a deformed rectangle, without departing from the scope of the present invention. Similarly, it could be conceived that all the shapes of the input faces are distinct from one another or that the dimensions of only a part or of all the input faces are distinct from one another or that the orientations of only a part or of all the input faces are distinct from one another, without departing from the scope of the present invention. Similarly, the junction faces of the light guides can be distinct from one another.

[0062] Each window 72 of the mask 7 extends opposite a junction face 52 of a light guide 5 opposite which a light source has been arranged. In other words, each window 72 makes it possible to redefine a contour in the primary image formed at the junction face 52 opposite which it is arranged, to thus form a secondary image. The periphery of each window 72 therefore defines the contour of each secondary image. It will be noted that for the two light guides 5 without a light source, only an opaque zone extends opposite their junction faces 52.

[0063] In the example described, the optical output member 6 has an output face that is substantially in the shape of a smooth dome.

[0064] The optical module 1 comprises an optical projection system 8. In the example of 1a, the optical projection system 8 is a projection lens 8 having a focal plane 81 passing substantially through the upstream face of the mask 7.

[0065] This projection lens 8 is thus arranged to project onto the ground, in a near field, the secondary images formed by the mask 7. The patterns projected onto the ground then have contours defined by the periphery of the windows 72 which are thus entirely delimited by sharp edges in the images projected onto the ground, after inversion by the projection lens 8.

[0066] Describes a lighting system 10 of a motor vehicle according to an exemplary embodiment of the invention.

[0067] The lighting system 10 comprises a front projector 11. The optical module 1 is arranged in the front projector 11.

[0068] The lighting system 10 comprises a control unit (not shown) receiving instructions from a computer of the motor vehicle for carrying out lighting functions, and controlling the LEDs 2 of the optical module 1 according to these instructions.

[0069] Upon receipt of an instruction to transmit a function of the scrolling direction indicator type, for example generated by the computer when the motor vehicle changes lane, the control unit cyclically switches on the LEDs 2. For example, during a cycle, the control unit activates the LED 2 at the bottom right, the optical module 1 thus projecting onto the ground, in the near field of the vehicle, the image 10a formed by the mask 7 from the junction face 52 of the corresponding light guide 5. The control unit then activates the LEDs 2 of the diagonal, the optical module 1 thus projecting onto the ground, in the near field of the vehicle, the image 10b formed by the mask 7 from the junction faces 52 of the corresponding light guides 5, the previous LED 2 remaining activated.The control unit then activates the remaining LEDs 2, the optical module 1 thus projecting onto the ground, in the near field of the vehicle, the image 10c formed by the mask 7 from the junction faces 52 of the corresponding light guides 5, the previous LEDs 2 remaining activated. Finally, the control unit deactivates all the LEDs 2.

[0070] It is thus understood that the optical module 1 thus performs a direction indicator function, which can in particular complement a scrolling direction indicator function performed by a rear light of the vehicle. The images 10a, 10b and 10c being projected onto the ground, in the near field of the vehicle, they are thus likely to be easily perceived by a road user traveling alongside the motor vehicle. In particular, the sub-patterns produced by the windows 72 of the mask 7 from the images of the junction faces 52 of the light guides 5 can be distinguished on the image.

[0071] It will be noted that to form other patterns, of different shapes and / or composed of a different number of sub-patterns, the primary optical system 4 can remain identical, and that it is appropriate to modify the arrangement and / or the number of LEDs and / or to modify the shape and / or the number of zones 73 capable of letting light pass.

[0072] The foregoing description clearly explains how the invention makes it possible to achieve the objectives it has set itself, namely to propose a compact and efficient optical module making it possible to produce a complex pattern from a single light source, such as for example a pattern comprising details within this pattern itself or a pattern composed of several disjoint sub-patterns, and / or which makes it possible to improve the sharpness of the pattern projected on the ground, this optical module combining a primary optical system capable of forming primary images from light sources and a mask capable of modifying these primary images to form secondary images.

[0073] In any event, the invention cannot be limited to the embodiments specifically described in this document, and extends in particular to any equivalent means and to any technically effective combination of these means. In particular, it may be possible to envisage using other types of light sources than those described. Other shapes for the junction faces or for the windows of the mask may also be envisaged. It may also be possible to provide a primary optical system comprising a single primary optical member. It may also be possible to envisage other types of primary optical members than a light guide, and in particular collimators, lenses or microlenses, reflectors or combinations of different types of primary optical members. Other embodiments of the mask may also be envisaged.It will also be possible to envisage other lighting functions than those described, and in particular other functions for indicating a change in the trajectory of a motor vehicle, such as a reversing indicator or a lane change indicator, driving assistance functions or even communication functions between vehicles, or even functions for signaling a manual or autonomous driving mode.

Claims

Optical module (1) of a lighting system (10) of a motor vehicle, comprising: at least one light source (2); a single-piece primary optical system (4) comprising at least one primary optical member (5), said primary optical member being arranged to form a primary image from said light source; a mask (7) arranged downstream of said primary optical member and having at least one opaque zone (71) and a window (72) formed in the opaque zone, said window being arranged opposite said primary optical member to form a secondary image from the primary image, a portion (54) of the single-piece primary optical system extending through said window; a projection optical system (8) arranged to project onto the ground the secondary image formed by the mask. Optical module (1) according to the preceding claim, characterized in that the primary optical system (4) is produced by overmolding at least one material onto the mask (7). Optical module (1) according to one of the preceding claims, in which the optical projection system (8) has a focal surface (81) passing substantially through the mask (7) or situated substantially between the primary optical member (5) and the mask. Optical module (1) according to one of the preceding claims, characterized in that it comprises a plurality of selectively controllable light sources (2), in that the single-piece primary optical system (4) comprises a plurality of primary optical members (5), in which each primary optical member is arranged to form a primary image from one of said light sources, and in which the mask (7) comprises a plurality of windows (72) each arranged opposite one of the primary optical members to form a secondary image from the primary image formed by this primary optical member; a portion (54) of the single-piece primary optical system extending through each of the windows. Optical module (1) according to the preceding claim, in which the primary optical members (5) are arranged in a matrix manner. Optical module (1) according to one of the preceding claims, characterized in that the primary optical system (4) comprises an output optical member (6), said primary optical member comprising a light entry face (51) opposite which said light source is arranged and a junction face (52) connecting the primary optical member to said portion (54) extending through said window (72), said portion being connected to the output optical member. Optical module (1) according to the preceding claim, characterized in that the junction face (52) of the primary optical member (5) and an upstream face of the mask (7) extend substantially in the same plane. Optical module (1) according to one of claims 6 or 7, wherein said primary optical member (5) comprises a primary light guide, the input face (51) of said light guide being connected to the junction face (52) of said light guide by an envelope (53) such that each point of the contour of the input face is connected to a point of the contour of the junction face by a straight line. Optical module (1) according to one of claims 6 to 8, in which the optical projection system (8) has a focal surface (81) passing substantially through the junction face (52) of said primary optical member (5) with the portion (54). Lighting system (10, 100) of a motor vehicle, comprising an optical module (1, 20) according to one of the preceding claims.

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