FR3111437A1 - Zipper optical system - Google Patents

Abstract

Slide optical system The invention relates to an optical system (100) comprising a plurality of optical sensors (111) and a plurality of objectives (121), each objective (121a) of the plurality of objectives (121) being intended to be arranged on the optical path (111b) of an optical sensor (111a) of the plurality of optical sensors (111), the optical system being characterized in that:• the plurality of optical sensors (111) is carried by an optical unit (110) ;• the plurality of lenses (121) is carried by a lens holder (120); and in that it comprises at least one slide configured to guide the lens holder (120) in translation relative to the optical block (110), so as to allow the assembly of the lens holder with the optical block. Figure for abstract: Fig.1

Description

Slide optical system

The present invention relates to the field of optical devices. It finds a particularly advantageous application in the field of optical devices comprising a plurality of optical sensors.

STATE OF THE ART

There are many optical systems comprising a plurality of optical sensors. It is common that some of these optical sensors have a different lens than other sensors.

In the military field, it is also known to use infrared imaging systems combined with imaging systems in the visible spectrum.

These various solutions make it possible to collect several optical information from the same scene but are limited to certain optical properties by their configuration.

Indeed, if a user wishes to modify the optical properties of such a device, he must disassemble one sensor after another to modify the optical characteristics, such as changing a filter or replacing a lens.

A non-limiting object of the present invention is therefore to propose a solution to these various problems.

The other objects, features and advantages of the present invention will become apparent from a review of the following description and the accompanying drawings. It is understood that other benefits may be incorporated.

SUMMARY

1. la pluralité de capteurs optiques est portée par un bloc optique ;
2. la pluralité d’objectifs est portée par un porte objectifs ;

et en ce qu’il comporte au moins une glissière configurée pour guider en translation le porte objectifs relativement au bloc optique, de sorte à permettre le montage du porte objectifs avec le bloc optique.A first aspect relates to an optical system comprising a plurality of optical sensors and a plurality of lenses, each lens of the plurality of lenses being intended to be placed on the optical path of an optical sensor of the plurality of optical sensors, the optical system being characterized in that:

1. the plurality of optical sensors is carried by an optical unit;
2. the plurality of lenses is carried by a lens holder;

and in that it comprises at least one slide configured to guide the lens holder in translation relative to the optical block, so as to allow the mounting of the lens holder with the optical block.

This makes it possible to easily position a plurality of objectives at the same time relative to a plurality of optical sensors. This saves a lot of time.

In addition, this makes it easy and quick to replace one or more lenses at the same time.

The orientation of the lenses relative to the optical sensors is also ensured each time the lens holder is mounted and removed from the optical unit.

It is thus possible to have a plurality of lens gates, each having its specificities and thus makes it possible to quickly and easily replace one set of lenses with another.

1. Translation du porte objectifs le long de la glissière relativement au bloc optique ;
2. Disposition du porte objectifs relativement au bloc optique de sorte que tous les objectifs de la pluralité d’objectifs soient disposés sur le trajet optique d’un capteur optique de la pluralité de capteurs optiques.

Another aspect relates to a method for mounting at least one lens holder on an optical unit of an optical system, the method comprising the following steps:

1. Translation of the lens holder along the slide relative to the optical unit;
2. Arrangement of the lens holder relative to the optical block so that all the lenses of the plurality of lenses are arranged on the optical path of an optical sensor of the plurality of optical sensors.

1. Translation du porte objectifs le long de la glissière relativement au bloc optique ;
2. Retrait du porte objectifs du bloc optique de sorte qu’aucun objectif de la pluralité d’objectifs ne soit disposé sur le trajet optique d’un capteur optique de la pluralité de capteurs optiques.

Another aspect also relates to a method for dismantling at least one lens holder mounted on an optical unit of an optical system, the method comprising at least the following steps:

1. Translation of the lens holder along the slide relative to the optical unit;
2. Removing the lens holder from the optical unit so that no lens of the plurality of lenses is placed in the optical path of an optical sensor of the plurality of optical sensors.

BRIEF DESCRIPTION OF FIGURES

The aims, objects, as well as the characteristics and advantages of the invention will emerge better from the detailed description of an embodiment of the latter which is illustrated by the following accompanying drawings in which:

Figure 1 shows an isometric view of an optical system according to one embodiment of the present invention.

FIG. 2 represents an isometric view of the optical system illustrated in FIG. 1 according to a different viewing angle.

FIG. 3 represents an isometric view of a lens holder secured to an optical block according to an embodiment of the present invention.

FIG. 4 represents the assembly of a lens holder with an optical unit according to an embodiment of the present invention.

FIG. 5 represents the assembly of a lens holder with an optical unit according to FIG. 4 and according to a different angle of view.

FIG. 6 represents a lens holder seen from below according to an embodiment of the present invention.

FIG. 7 represents a lens holder seen from behind according to an embodiment of the present invention.

FIG. 8 represents a view according to section AA of a lens holder according to one embodiment of the present invention.

FIG. 9 represents a view according to section BB of a lens holder according to an embodiment of the present invention

FIG. 10 represents a view according to section CC of a lens holder according to an embodiment of the present invention.

FIG. 11 represents a view according to section DD of a lens holder according to an embodiment of the present invention.

FIG. 12 represents a rear view of a lens holder comprising a plurality of lenses, the lens holder being mounted on an optical unit according to an embodiment of the present invention.

The drawings are given by way of examples and do not limit the invention. They constitute schematic representations of principle intended to facilitate understanding of the invention and are not necessarily scaled to practical applications. In particular the dimensions are not representative of reality.

DETAILED DESCRIPTION

Before starting a detailed review of embodiments of the invention, optional characteristics are set out below which may possibly be used in combination or alternatively:

According to one example, the slide comprises at least one groove and at least one rectilinear guide element, the groove and the rectilinear guide element being intended to cooperate with each other, the groove being carried, at least partially, by one of at least the optical unit and the lens holder, and the rectilinear guide element being carried, at least partially, by the other of at least the optical unit and the lens holder.

This makes it very easy to position the lens holder by simple translation along the groove relative to the optical block.

According to one example, the groove comprises a chamfer at one of its ends, the chamfer being configured to accommodate the rectilinear guide element when it is introduced into the groove.

This makes it possible to position the lens holder more quickly and to accompany it in the translation position.

According to one example, the system comprises a first centering pin and a first centering hole, the first centering pin being configured to cooperate with the first centering hole so as to ensure the reproducible positioning of the lens holder relative to the optical unit when the lens holder is mounted with the optical unit, the first centering pin being carried, at least partially, by one of at least the optical unit and the lens holder, the first centering hole being carried, at least partially, by the other among at least the optical unit and the lens holder.

This makes it possible to position the lens holder reliably and reproducibly with respect to the optical unit, and therefore with respect to the optical sensors.

Thus, at each assembly, the lens holder is correctly positioned relative to the plurality of optical sensors.

According to one example, the first centering peg is a peg with a spherical bearing.

According to one example, the system comprises a second centering pin and a second centering hole, the second centering pin being configured to cooperate with the second centering hole so as to ensure the reproducible positioning of the lens holder relative to the optical unit when the lens holder is mounted with the optical unit, the second centering pin being carried, at least partially, by one of at least the optical unit and the lens holder, the second centering hole being carried, at least partially, by the other among at least the optical unit and the lens holder.

This makes it possible to reinforce the reliability of the positioning of the lens holder with respect to the optical block, and therefore with respect to the optical sensors.

Thus, at each assembly, the lens holder is correctly positioned relative to the plurality of optical sensors.

According to one example, the second centering peg is a peg with a spherical bearing.

According to one example, the first centering hole has a spatial extension in a direction of extension greater than the spatial extension of the second centering hole in this same direction of extension.

This makes it possible to accommodate, in a particular direction, the thermal expansions that the lens holder may undergo relative to the optical unit.

According to one example, the first centering hole is an oblong hole and the second centering hole is a round hole.

This makes it possible to accommodate, in a particular direction, the thermal expansions or the manufacturing tolerances that the lens holder may undergo relative to the optical block.

According to one example, the main direction of extension of the oblong hole is orthogonal to the direction of extension in thickness of the lens holder, this direction of extension in thickness being taken along an axis orthogonal to an optical plane defined by at least one lens of the plurality of objectives.

This makes it possible to accommodate the thermal expansion of the lens holder relative to the optical unit.

According to one example, the lens holder comprises a device for holding in position at least one lens of the plurality of lenses relative to the optical path of an optical sensor of the plurality of optical sensors.

This allows fine adjustment of the main extension plane of the lens relative to the direction of the light path of the optical sensor.

This adjusts the orthogonality of the optical plane of the lens relative to the optical path of the optical sensor.

This adjusts the spatial orientation of the lens relative to the optical path of the optical sensor.

This aligns, and preferably makes collinear, the optical path of the lens and the optical path of the optical sensor.

According to one example, the optical block comprises at least one device for adjusting the position of at least one optical sensor of the plurality of optical sensors relative to the optical path of a lens of the plurality of lenses.

This allows fine adjustment of the main extension plane of the optical sensor relative to the direction of the optical path of the lens.

This adjusts the orthogonality of the optical plane of the optical sensor relative to the optical path of the lens.

This adjusts the spatial orientation of the optical sensor relative to the optical path of the lens.

This aligns, and preferably makes collinear, the optical sensor optical path and the lens optical path.

According to one example, the lens holder comprises at least one gripping element configured to allow handling of the lens holder in the slide by a user.

This allows simple, reliable and reproducible handling of the objective carrier.

According to one example, the at least one gripping element is removable relative to the lens holder.

This reduces the bulk and increases the compactness of the optical system.

According to one example, each objective of the plurality of objectives comprises at least one of: an optical lens, an optical filter, an optical mask. Preferably, each lens of the plurality of lenses includes one or more optical lenses and one or more optical filters. Advantageously, the optical lens or lenses allow transmission in the infrared, with an optical field for example of 12° to 60° generally, and having a large aperture to maximize the optical flow entering the system. Cleverly, the optical filter(s) each make it possible to transmit the radiation in the infrared, and preferably in a different spectral range for each filter.

This makes it possible to modify the optical rays in the direction of an optical sensor.

According to one example, the lens holder is manually removable from the optical unit.

This allows rapid replacement, assembly and disassembly of the lens holder relative to the optical block.

According to one example, the system comprises a first retaining screw intended to secure at least part of the lens holder with the optical block, the first retaining screw extending along an axis orthogonal to an optical plane defined by at least one lens of the plurality of objectives.

This makes it possible to secure the lens holder with the optical unit.

According to one example, the system comprises a second retaining screw intended to at least partially secure the lens holder with the optical unit, the second retaining screw extending along an axis orthogonal to an optical plane defined by at least one lens of the plurality of objectives.

This makes it possible to secure the lens holder with the optical unit.

According to one example, the method comprises, after the step of arranging the lens holder, a step of adjusting the position of at least one lens of the plurality of lenses relative to the optical path of an optical sensor of the plurality of optical sensors.

According to one example, the method comprises, after the step of arranging the lens holder, a step of adjusting the position of at least one optical sensor of the plurality of optical sensors relative to the optical path of a lens of the plurality of 'goals.

According to one example, the lens holder comprises at least one removable gripping element configured to allow handling of the lens holder in the slide by a user, the method comprises, after the step of arranging the lens holder, at least one dismantling step of the first gripping element.

The present invention relates to an optical system comprising a plurality of optical sensors and a plurality of lenses. Each objective of this plurality of objectives is intended to be placed on the optical path of an optical sensor of the plurality of optical sensors. The expression “optical system” does not mean that the system is systematically only optical in nature. Indeed, it also typically includes at least electronic elements.

By optical path of an optical sensor is meant the optical path followed by one or more optical rays from outside the optical system to the optical sensor considered. In the same way, the optical path of a lens is understood to mean the optical path followed by one or more optical rays from the outside of the optical system towards the lens in question.

Advantageously, the plurality of optical sensors is carried by an optical block.

Advantageously, the plurality of lenses is carried by a lens holder configured to be alternately mounted and dismounted on the optical block. Thus, when the lens holder is mounted on the optical unit, each lens intercepts the optical path of at least one optical sensor, and when one or more lenses need to be changed or repaired, the lens holder is removed from the optical unit.

Cleverly, the present invention allows easy and quick replacement of lenses.

Preferably, and to facilitate assembly and disassembly of the lens holder, the optical system comprises at least one slide configured to guide the lens holder in translation relative to the optical block.

According to one embodiment, this slide described below comprises at least one groove, preferably a first groove and a second groove, and at least one rectilinear guide element, preferably a first rectilinear guide element and a second straight guidance.

Each groove is advantageously configured to cooperate with a rectilinear guide element, and vice versa.

According to various embodiments, it is possible that at least one groove is carried by the lens holder and that in this case at least one rectilinear guide element is carried by the optical block, or vice versa.

According to a preferred embodiment, the lens holder comprises a first rectilinear guide element and a second rectilinear guide element, and the optical unit comprises a first groove and a second groove. The first rectilinear guide element is configured to cooperate with the first groove and the second rectilinear element is configured to cooperate with the second groove.

We will now describe the present invention according to one embodiment through Figures 1 to 13.

Figures 1 and 2 illustrate an optical system 100 according to one embodiment of the present invention. It will be noted in particular in these two figures that the optical unit 110 comprises the plurality of optical sensors 111. In these two figures, it will be noted that the lens holder 120 comprises the plurality of lenses 121. In these two figures, the lens holder 120 is in the configuration mounted on the optical block 110.

According to a non-limiting embodiment, each lens 121a is intended to be placed in front of an optical sensor 111a when the lens holder 120 is mounted on the optical unit 110. This allows each lens 121a to be able to influence, according to its optical properties, the optical rays reaching the optical sensor 111a in front of which it is arranged.

By objective 121a is understood any element or optical transmission device able to influence a physical parameter of the optical rays passing through it, for example an objective can comprise an optical lens, a diopter, a filter or even a mask or even a baffle.

In FIGS. 1 and 2, it will also be noted that according to an advantageous embodiment, the optical sensors 111a can comprise one or more adjustment devices 112 configured to adjust the positioning of the optical sensor 111a relative to the optical unit 110 and/or to the lens holder 120, for example to position the optical receiving surface of the optical sensor 111a along a plane orthogonal to the optical path 121b of a lens 121a.

According to one possibility, the adjustment devices 112 allow adjustment in position according to at least one of the following degrees of freedom: translation in the direction of the slide, translation in a direction orthogonal to the slide, inclination of the optical axis of the sensor relative to the plane defined by the two previous directions.

In Figure 3, the plurality of optical sensors 111 has been removed in order to more clearly illustrate the cooperation between the lens holder 120 and at least part of the optical block 110.

In Figures 1, 2 and 3, there is a first gripping element 251 and a second gripping element 252. Indeed, in a particularly advantageous manner, the lens holder 120 comprises at least one gripping element (251, 252), and preferably a first 251 and a second 252 gripping element. These gripping elements 251 and 252 are configured to allow the assembly and disassembly of the lens holder 120 with the optical block 110.

Advantageously, these two gripping elements 251 and 252 are configured to be gripped by a user so as to disassemble the lens holder 120 from the optical block 110 by causing the lens holder 120 to translate along the slide 200 using these two gripping elements. 251 and 252 to pull the lens holder 110 out of its housing.

Advantageously, these two gripping elements 251 and 252 are configured to be gripped by a user so as to mount the lens holder 120 on the optical unit 110 by causing the lens holder 120 to translate along the slide 200 using these two grip 251 and 252 to push the lens holder 120.

According to one embodiment, and as illustrated in the figures, the first gripping element 251 and the second gripping element 252 are arranged on the same face of the lens holder 120.

Preferably, the first gripping element 251 and the second gripping element 252 are arranged substantially at opposite ends of the same face of the lens holder 120.

Advantageously, and in order to facilitate the assembly and disassembly of the lens holder 120 on the optical unit 110, the first gripping element is aligned with a first slide 200, preferably with a first rectilinear guide element 221.

Advantageously, and still in order to facilitate the assembly and disassembly of the lens holder 120 on the optical block 110, the second gripping element is aligned with a second slide 200, preferably with a first rectilinear guide element 222.

According to a preferred embodiment, and in order to increase the compactness of the optical system according to the present invention, the first 251 and the second 252 gripping element are removable. This reduces the size of the 120 lens holder.

Advantageously, the first 251 and second 252 gripping elements can be screwed and unscrewed from the lens holder 120.

By non-limiting example, when a user wishes to mount the lens holder 120 on the optical block 110, the latter holds the lens holder 120 via the first 251 and second 252 gripping elements, then aligns the first guide element rectilinear 221 with the first groove 211, and the second rectilinear element 222 with the second groove 221. Then, the user slides the lens holder 120 in the first and the second slide 200 until the plurality of lenses 121 are positioned in front of the plurality of optical sensors 111, preferably until reaching the end of the travel of the first and second slides 200. The first 251 and second 252 gripping elements thus allow the correct alignment of the lens holder 120 with respect to the slides 200. first 251 and second 252 gripping elements also make it possible not to touch the lenses 121a when handling the lens holder 120, and thus preserves r their cleanliness and integrity. Once the lens holder 120 is mounted on the optical block 110, the user disassembles, preferably unscrews, the first gripping element 251 and the second gripping element 252.

Similarly, when the user wishes to disassemble the lens holder 120 from the optical unit 110, he mounts, preferably he screws, first the first gripping element 251, then the second gripping element 252. Then, he uses them to pull the lens holder 120 along the slides 200 until releasing the rectilinear guide elements 221 and 22 from the grooves 211 and 212.

Figures 4 and 5 illustrate for example the mounting of the lens holder 120 on the optical block 110 as previously described.

In these figures, it will be noted that the lens holder 120 comprises the first rectilinear guide element 221 and the second rectilinear guide element 222 and that the optical unit 110 comprises the first groove 211 and the second groove 212.

The first groove 211 is configured to cooperate with the first rectilinear guide element 221 and the second groove 212 is configured to cooperate with the second rectilinear guide element 222.

According to one embodiment, the first groove 211 and the second groove 212 each comprise a chamfer 223 configured to allow the insertion and guidance of the lens holder 120. This simplifies, facilitates and saves time when mounting the lens holder. 120.

In these figures, the optical paths 121b of two objectives 121a of the plurality of objectives 121 are represented.

Note also the presence of a first centering pin 231 which will be described through Figures 8 and 9. Preferably, this centering pin 231 can be arranged at the end of the slide 200 run so that the door objectives 120 come to position above.

According to one embodiment, the optical system 100 comprises a first centering pin 231 and a second centering pin 232, each configured to cooperate respectively with a first centering hole 241 and a second centering hole 242.

Thus, a centering pin 231, 232 and a centering hole 241, 242 collaborate with each other in order to allow the centering of the lens holder 120 relative to the optical block 110. Preferably, and advantageously, the first centering hole 241 and the second centering hole 242 are carried by the lens holder 120.

Advantageously, the centering pins 231, 232 can have a spherical shape. This facilitates the assembly operation. Indeed, thus, it is not necessary to be perfectly in line with the slide 200 when positioning the lens holder 120 in the slide 200. This facilitates the step of mounting the lens holder 120 on the optical unit 110.

Finally, in Figure 5 in particular, note the bearing faces 113 which advantageously serve as a reference for the parallelism of the lens holder 120 when the latter is placed on the optical block 110, preferably in the slider 200.

According to one embodiment, when inserting the lens holder 120 into the slider 200, a non-zero angle is allowed between the plane defined by the support surfaces 113 and the plane defined by the front face of the lens holder 120. According to a non-limiting example, this non-zero angle can preferably be between 0.1 and 1 degree, preferably between 0.2 and 0.5 degree and advantageously equal to 0.3 degree.

In this same figure, the longitudinal axis 101 and the transverse axis 102 of the optical system 100 will also be noted.

According to one embodiment, the second centering pin 232 serves as a reference point along the longitudinal axis 101 when positioning the lens holder 120 on the optical unit 110, preferably in the slider 200.

According to another embodiment, the first centering pin 231 and the second centering pin 232 serve as reference points along the longitudinal axis 101 when positioning the lens holder 120 on the optical unit 110, preferably in the slider 200 .

According to one embodiment, the first centering pin 231 and the second centering pin 232 serve as reference points along the transverse axis 102 when positioning the lens holder 120 on the optical unit 110, preferably in the slider 200.

According to another embodiment, the first centering pin 231 serves as a reference point along the transverse axis 102 when positioning the lens holder 120 on the optical block 110, preferably in the slider 200.

Figure 6 corresponds to a bottom view of the lens holder 120. Note the presence of the first centering hole 241 and the second centering hole 242.

According to one embodiment, and in a clever way, the first centering hole 241 is an oblong hole while the second centering hole 242 is a round hole.

Advantageously, the cooperation of the second centering pin 232 and the second centering hole 242 makes it possible to define a reference frame during the assembly of the lens holder 120. This makes it possible to improve the reproducibility and the reliability of the positioning of the lenses 121a relative to the sensors lenses 111a at each assembly.

According to one embodiment, the oblong hole 241 has a main direction of extension 241a orthogonal to the direction of extension in thickness 120c of the lens holder 120, as illustrated in FIG. 6.

Preferably, the main direction of extension 241a of the oblong hole 241 is parallel to the direction of extension in width 120a of the lens holder 120.

This makes it possible in a clever way to compensate for possible thermal expansions that may occur and which would cause mechanical stresses between the lens holder 120 and the optical unit 110.

According to one embodiment, the materials chosen for the design and production of the lens holder 120 and of the optical unit 110 make it possible to compensate for possible thermal expansions. Advantageously, the lens holder 120 and the optical unit 110 each comprise the same material or materials, preferably aluminum.

This also makes it possible to have a construction tolerancing allowing possible manufacturing defects to be taken into account.

Finally, the main extension direction 241a of the oblong hole preferably makes it possible to ensure parallelism between the lens holder 120 and the optical block 110, that is to say between the lens holder 120 and the plurality of optical sensors 111 .

It will be noted that according to a preferred embodiment, the first centering pin 231 and the second centering pin 232 cooperate with the bearing surfaces 113 in order to ensure parallelism along a plane between the lens holder 120 and the optical unit 110 , that is to say between the lens holder 120 and the plurality of optical sensors 111.

Thus, the first centering pin 231 is configured to cooperate with the oblong hole 241. It will be noted that the first centering pin 231 has a shape whose lateral extension dimension is less than the main extension dimension 241a of the hole oblong 241, so as to allow play and slight mobility of the oblong hole 241 around the first centering pin 231 in the main extension direction 241a of the oblong hole 241.

It will be noted that this centering device comprising a pin/hole pair is advantageous because it makes it possible to guarantee, at least in part, the alignment of the lens holder 120 relative to the optical block 110 and therefore to the plurality of optical sensors 111. This allows therefore to ensure, in part at least, the proper alignment of each objective 121a with respect to at least one optical sensor 111a. This centering thus allows that at each assembly, the objectives 121a are arranged in a reproducible manner with respect to the optical sensors 111a.

Indeed, one of the many advantages brought by the present invention is its robustness concerning the reproducibility of the relative positioning of the objectives 121a with respect to their respective optical sensor 111a.

In FIG. 7, one will notice two housings 191 and 192 for the screws for securing the lens holder 120 with the optical block 100. This makes it possible to reinforce the solidity of the optical system.

Figures 8, 9 and 10 are views according to different sections of the embodiment of the present invention illustrated in Figure 3.

We find in particular the first gripping element 251 and the second gripping element 252, each mounted on the lens holder 120, preferably by screwing.

We also note the two centering devices, indeed we find the first centering pin 231 engaged in the first centering hole 241, which is preferably oblong, and the second centering pin 232 engaged in the second centering hole 242.

Note the clearance at the level of the centering device comprising the first pin 231 and the first centering hole 241. This clearance, as indicated previously, can make it possible to take into account possible thermal expansions of the lens holder 120 and/or of the optical unit 110.

Figure 11 illustrates a view in section D-D of an optical system 100 according to one embodiment of the present invention. In this figure, the optical path 111b of the optical sensors 111a can be seen.

In a particularly advantageous manner, and as described in figure 12, each lens 121a has a device for maintaining position 122.

In particular, this position holding device 122 is used to hold the lens 121a in such a way that the focal distance between the optical sensor 111a and the lens 121a in question is respected and does not become disturbed over time.

It will be noted that the position adjustment device 112 makes it possible to adjust the position of an optical sensor 111a relative to at least one objective 121a considered. This position adjustment device 112 makes it possible to adjust the position of an optical sensor 111a according to the optical path 121b of the lens 121a. This makes it possible to adjust, for example, the orientation of the main extension plane of an optical sensor 111a with respect to the optical path 121b of a lens 121a considered. Preferably, the position adjustment device 112 makes it possible to ensure at least one of the following adjustments for each optical sensor 111a: the position in the direction of the slide, the position in a direction perpendicular to the slide, a inclination of the optical axis relative to the plane of translation of the lens holder 120.

The present invention thus allows the reliable and reproducible positioning of a plurality of objectives 121 relative to a plurality of optical sensors 111 in a single assembly.

The invention is not limited to the embodiments described above and extends to all the embodiments covered by the claims.

List of references
100. Optical system
101. Longitudinal axis
102. Cross axis
110. Optical block
111. Plurality of optical sensors
111a. Optical sensor
111b. Optical path of an optical sensor
112. Device for adjusting an optical sensor
113. Support face
120. Lens holder
120a. Direction of extension in height of the objective holder
120b. Direction of extension in width of the objective holder
120c. Direction of extension in thickness of the objective holder
121. Plurality of objectives
121a. Objective
121b. Optical path of a lens
122. Lens adjustment device
131. Housing of the first retaining screw
132. Housing of the second retaining screw
200. Slide
211. First Groove
212. Second Groove
221. First straight guide element
222. Second straight guide element
231. First centering pin
232. Second centering pin
241. First centering hole
241a. Slotted hole main expansion direction
242. Second centering hole
251. First gripping element
252. Second gripping element

Claims (16)

Optical system (100) comprising a plurality of optical sensors (111) and a plurality of objectives (121), each objective (121a) of the plurality of objectives (121) being intended to be placed on the optical path (111b) an optical sensor (111a) of the plurality of optical sensors (111), the optical system being characterized in that:

• the plurality of optical sensors (111) is carried by an optical block (110);
• the plurality of lenses (121) is carried by a lens holder (120);

and in that it comprises at least one slide (200) configured to guide the lens holder (120) in translation relative to the optical unit (110), so as to allow the mounting of the lens holder with the optical unit. System (100) according to the preceding claim, in which the slideway (200) comprises at least one groove (211, 212) and at least one rectilinear guide element (221, 222), the groove (211, 212) and the rectilinear guide (221, 222) being intended to cooperate with each other, the groove (211, 212) being carried, at least partially, by one of at least the optical unit (110) and the holder objectives (120), and the rectilinear guide element (221, 222) being carried, at least partially, by the other of at least the optical block (110) and the objective holder (120). System (100) according to any one of the preceding claims comprising a first centering pin (231) and a first centering hole (241), the first centering pin (231) being configured to cooperate with the first centering hole ( 241) so as to ensure the reproducible positioning of the lens holder (120) relative to the optical unit (110) when the lens holder (120) is mounted with the optical unit (110), the first centering pin (231) being carried, at least partially, by one of at least the optical unit (110) and the lens holder (120), the first centering hole (241) being carried, at least partially, by the other of at least the optical unit (110) and the lens holder (120). System (100) according to the preceding claim comprising a second centering pin (232) and a second centering hole (242), the second centering pin (232) being configured to cooperate with the second centering hole (242) so to ensure the reproducible positioning of the lens holder (120) relative to the optical unit (110) when the lens holder (120) is mounted with the optical unit (110), the second centering pin (232) being carried, at least partially, by one of at least the optical unit (110) and the lens holder (120), the second centering hole (242) being carried, at least partially, by the other of at least the optical unit (110) and the lens holder (120). System (100) according to the two preceding claims in combination, wherein the first centering hole (241) is an elongated hole and the second centering hole (242) is a round hole. System (100) according to the preceding claim, in which the main direction of extension (241a) of the oblong hole is orthogonal to the direction of extension in thickness (120c) of the lens holder (110), this direction of extension in thickness ( 120c) being taken along an axis orthogonal to an optical plane defined by at least one lens (121a) of the plurality of lenses (121). System (100) according to any one of the preceding claims, in which the lens holder (120) comprises a device for holding in position (122) at least one lens (121a) of the plurality of lenses (121) relative to the optical path (111b) of an optical sensor (111a) of the plurality of optical sensors (111). System (100) according to any one of the preceding claims, in which the optical block (110) comprises at least one device for adjusting the position (112) of at least one optical sensor (111a) of the plurality of optical sensors ( 111) relative to the optical path (121b) of one of the plurality of lenses (121). System (100) according to any one of the preceding claims, in which the lens holder (120) comprises at least one gripping element (251) configured to allow handling of the lens holder (120) in the slide (200) by a user . System (100) according to the preceding claim, in which at least one gripping element (251) is removable relative to the lens holder (120). A system (100) according to any preceding claim wherein each lens (121a) of the plurality of lenses (121) includes at least one of: an optical lens, an optical filter, an optical shield, a baffle. Method for mounting at least one lens holder (120) on an optical unit (110) of an optical system (100) according to any one of the preceding claims, the method comprising the following steps:

• Translation of the lens holder (120) along the slide (200) relative to the optical unit (110);
• Arrangement of the lens holder (120) relative to the optical block (110) so that all the lenses (121a) of the plurality of lenses (121) are arranged on the optical path (111b) of an optical sensor (111a) of the plurality of optical sensors (111).

Method according to the preceding claim comprising, after the step of arranging the lens holder (120), a step of adjusting the position of at least one lens (121a) of the plurality of lenses (121) relative to the optical path ( 111b) of an optical sensor (111a) of the plurality of optical sensors (111). Method according to any one of the two preceding claims, in which the lens holder (120) comprises at least one removable gripping element (251) configured to allow handling of the lens holder (120) in the slide (200) by a user, the method comprising, after the step of arranging the lens holder (120), at least one step of dismantling the first gripping element (251). Method for dismantling at least one lens holder (120) mounted on an optical unit (110) of an optical system (100) according to any one of claims 1 to 12, the method comprising at least the following steps:

• Translation of the lens holder (120) along the slide (200) relative to the optical unit (110);
• Removing the lens holder (120) from the optical block (110) so that no lens (121a) of the plurality of lenses (121) is placed on the optical path (111b) of an optical sensor (111a) of the plurality of optical sensors (111).

Method according to the preceding claim, in which the lens holder (120) comprises at least one removable gripping element (251) configured to allow handling of the lens holder (120) in the slide (200) by a user, the method comprising, before the step of translating the lens holder (120), at least one step of mounting the first gripping element (251) on the lens holder (120).