WO2018234508A1

WO2018234508A1 - Optical recording system

Info

Publication number: WO2018234508A1
Application number: PCT/EP2018/066673
Authority: WO
Inventors: Jens Becker
Original assignee: Cruse Spezialmaschinen GmbH
Priority date: 2017-06-23
Filing date: 2018-06-21
Publication date: 2018-12-27
Also published as: DE102017113960A1

Abstract

The invention relates to an optical recording system (1) for capturing a three-dimensional surface structure of an object, the optical recording system (1) having a recording head (4) and an object support element (2), the recording head (4) being spaced from the object support element (2), a sensor element (6) for capturing optical information being arranged in or on the recording head (4), and the optical recording system (1) being designed such that an observation angle at which the optical recording system (1) captures the object is adjustable. According to the invention, a mirror element (9) is situated in or on the recording head (4) to reflect an image of the object towards the sensor element (6), wherein the sensor element (6) is arranged such that it can capture an image of the object reflected by the mirror element (9).

Description

Cruse Spezialmaschinen GmbH

Optical recording system

The invention relates to an optical recording system for detecting a three-dimensional surface structure of an object, wherein the optical recording system a

Receiving head and a slide member, wherein the receiving head is spaced from the slide member disposed, wherein in or on the receiving head a

Sensor element for detecting optical information

is arranged, and wherein the optical pickup system is formed so that an observation angle at which the optical pickup system detects the object is adjustable.

From the prior art optical recording systems for detecting a three-dimensional surface structure are known, which has a bearing surface for positioning and

Deploy objects. The recording systems are suitable to an object of different

Viewing angles using a recording head. However, a relatively large ceiling height is required to accommodate these recording systems, as a

Image path between the object to be detected and the

Sensor element is comparatively long. The invention is therefore based on the object to provide a particularly compact stationary recording system. The object is achieved by the optical recording system described above, wherein in or on the recording head, a mirror element for reflecting an image of the object in the direction of the sensor element is arranged, wherein the sensor element is arranged so that it is one of the

Mirror element can capture reflected image of the object.

The optical recording system can thus be dimensioned much more compact. In particular, an excessive height of the recording system can be avoided. According to the invention, the slide element can be a table, a holding plate or a comparable element which preferably has a flat surface. The sensor element may be

act according to the invention to a camera, in particular a line scan camera. By adjusting the observation angle, the object can be detected from different angles. The image taken by the sensor element changes depending on the observation angle. The recording of multiple images from different angles is necessary so that a three-dimensional representation of the object to be detected can be calculated from a plurality of individual images.

The sensor element and / or other components of the

optical recording system can be integrated into the recording head. It is alternatively possible that the

Sensor element and / or other components of the optical pickup system are arranged on an outer side of the recording head. The recording head according to the invention over a support element to be connected to the O jektträgerelement.

The mirror element reflects an image of the object in the direction of the sensor element. The mirror element allows an extremely compact design of the recording head. The height of previously known optical recording systems depends, among other things, on which sensor element and which objective are used. In addition, the height of the

Dimensions of the object to be detected. In some cases, optical pick-up systems may have a large height because a comparatively long image path between the object and the sensor element is necessary to fully detect the object. According to the invention, the overall height of the optical recording device is characterized

reduces the fact that the mirror element laterally deflects light rays.

Preferably, the sensor element and the mirror element are arranged in a common plane, wherein the common plane is aligned parallel to a plane defined by a surface of the slide element. As a result, in particular a particularly compact design of the recording head is made possible.

It is preferred if the sensor element is rotatable

is formed so that the observation angle at which the optical pickup system detects the object is adjustable. By a rotation of the sensor element it becomes

achieved that the object is under another

Observation angle can be detected, because of the object outgoing light rays hit after the rotation in one deviating angle to the sensor element. It is

According to the invention possible that the sensor element can be pivoted manually. It is particularly preferred if the optical pickup system is a drive element for

having automatic pivoting of the sensor element.

According to the invention, it is possible that the optical

Recording system has a control system that a

Control of the drive element allowed to the

Automated sensor element to pivot. The

Control system can be a computer unit and optional

additionally an input unit for inputting

Include information in the computer unit.

In addition, according to the invention, the control system can do so

be set up so that a calculation of

Three-dimensional surface structure of the object from several frames is possible.

If the sensor element is pivoted, then the object can be detected from different observation angles. For this purpose, object on the slide element does not necessarily have to be moved to another position. It turned out that alone by a

Swiveling the sensor element captures the object from different observation angles

three-dimensional rendering of the object is possible. However, it is optionally possible that a position of the object relative to the pickup head is changed when the sensor element is pivoted.

It is according to the invention also possible that in addition, the mirror element is designed to be pivotable. This provides an additional possibility for setting the observation angle. It can do that

Mirror element having a drive element, so that the mirror element does not have to be pivoted by hand.

It is preferred if the sensor element is displaceable transversely to an image path, so that the observation angle at which the optical recording system detects the object is adjustable. In the present case, an image path is to be understood as meaning a section of the optical recording system which is defined by the course of light rays emanating from the object to be detected and meeting the sensor element at the end of its course. If the sensor element is displaced transversely to the image path, it changes

Observation angle under which the object is detected. It is particularly preferred if in the image path at least one lens is arranged, which is designed so that it breaks out of the object light beams so that a comparatively large change in the observation angle even with a small change of a

Displacement position of the sensor element is transverse to the image path. If the sensor element only has to be slightly displaced to change the viewing angle, then only a short time is required for the sensor element

Displacement route are provided. Consequently, the recording head can be made compact, although the

Sensor element is arranged displaceably in the receiving head. As with the pivoting of the sensor element applies even with the displacement of the sensor element that a change in the position of the object relative to the recording head is not necessary to the object under different Capture observation angles and three-dimensional

to be able to reconstruct.

Preferably, the optical pickup system comprises a lens which is arranged in an image path between the sensor element and the mirror element. The at least one lens forms an objective or a part of an objective of the optical recording system. By means of the objective, a focus adjustment, an enlargement and / or other reproduction characteristics of an image of the object can be changed. According to the invention, two or more lenses may be arranged in the image path between the sensor element and the mirror element.

Preferably, the optical pickup system comprises at least one lens arranged in an image path between the

Mirror element and the slide element is arranged. The at least one lens may be stand alone or in

Combined with the at least one lens, which is arranged in the image path between the sensor element and the mirror element, form an objective of the optical pickup system.

It is advantageous if the at least one lens is displaceable along a portion of the image path and / or is pivotable out of the image path. By a

Shifting the lens can be different optical

Adjusted parameters of the lens. Some parameters of the lens can only be changed by using a different lens. For this purpose, the at least one lens can be arranged pivotably in the image path. It is possible, for example, a first lens from the image path to pivot out and pivot a second lens into the image path so that the second lens is used instead of the first lens.

It is particularly advantageous if the optical

Recording system has a drive system for shifting and / or pivoting of the at least one lens. The drive system can according to the invention at least one

Have electric motor. According to the invention that

previously described control system used to drive the drive system.

According to a preferred embodiment of the invention, the sensor element is arranged in the receiving head, wherein the receiving head is sealed dust-tight. The sensor element is thus protected from dust and other harmful

Protected against environmental influences. Moreover, according to the invention, further components of the optical recording system can be contained in the recording head, for example the

at least one lens located in the image path between the

Sensor element and the mirror element is arranged. The receiving head may have an opening flap that can be opened to the sensor element and

optionally further arranged in the receiving head components of the optical recording system

Maintenance purposes to make accessible from the outside.

It is possible according to the invention that the optical

Recording system has an infrared filter in an image path between the sensor element and the

Slide element is arranged. The image path between the sensor element and the slide element comprises both the image path between the sensor element and the

Mirror element as well as the image path between the

Mirror element and the O jektträgerelement. The

Infrared filter allows to filter infrared light, whereby disturbing influences by infrared light on the sensor element can be avoided.

Preferably, the optical pickup system has a

Polarizer on, in a picture path between the

Sensor element and the slide element is arranged. For example, this allows specific filtering of light that has been reflected by reflecting surfaces.

Unwanted reflection effects can thus be avoided or at least mitigated.

It is preferred if the polarizing filter is rotatable, is displaceable along a portion of the image path and / or can be pivoted out of the image path. By a

Displacement and / or rotation of the pole filter, its operation can be changed. By pivoting the pole filter out of the image path, the polarizing filter in the optical recording system is deactivated. The optical

Recording system according to the invention at least one

Have drive element for displacement, rotation and / or pivoting of the pole filter. The control system described above can be used to control the

at least one drive element of the pole filter can be used.

Preferably, the optical pickup system is so

formed such that the slide member and the

Recording head are displaced relative to each other. By the Displacement allows different portions of the object to be detected to be located on the slide member. In particular, for detecting a three-dimensional surface structure, it may be advantageous if not only the observation angle, but also the position of the recording head is changed relative to the object.

According to a particularly advantageous embodiment of the invention, the slide element is displaceable in a direction parallel to a surface of the slide element or the slide element has a

Conveying mechanism for relocating the object on the

Slide object so that the object on the

Recording head can be passed. The recording head according to the invention may be stationary or immovable. According to the invention it is possible, for example, that the receiving head is held by a support member which is not displaceably seated on a substrate or is firmly connected to an immovable portion of the optical pickup device.

The object may, according to a possible embodiment of the invention, be moved beneath the receiving head by displacing the slide member.

According to the invention, the slide element can be moved laterally or moved in some other way. The displacement can be effected by means of a drive element. The drive element of the slide element can be controlled by the control system described above. Alternatively, the object may be moved along the pickup head by moving the object on the pickup head O jektträgerelement is displaced by means of a conveying mechanism. According to the invention, the conveying mechanism may be a roller system, an assembly line or another conveying mechanism.

According to a further embodiment of the invention, the receiving head is displaceable in a direction parallel to the surface of the slide element, so that the

Recording head can be passed to the object. The slide element is stationary or immovable. It may be at the

Slide element, for example, act on a fixed and not displaceable on a table table. According to the invention, the receiving head can be fastened to a displaceable support element. The

Slide element according to the invention a

Have drive element which is adapted to displace the support element together with the receiving element. Alternatively, the receiving head may be attached to a support rail, wherein the receiving head along the

Retaining rail is displaced. The recording head can be equipped with a drive element which serves to displace the recording head along the retaining rail. The control system described above can be used according to the invention, to those by the

Drive element to cause supported displacement of the recording head.

The recording system preferably has an illumination system that is stationary on the optical recording system

is arranged. The lighting system includes

According to the invention at least one light emitter. If the Recording head is stationarily arranged on the optical pickup system, then the lighting system

preferably also stationary at the optical

Recording system arranged. An area under the

Recording head is thus always uniformly illuminated. On the other hand, if the pickup head is displaceably arranged on the pickup system, then the lighting system is preferably fixedly connected to the pickup head and / or to the support element to which the pickup head is attached. The lighting system is thus always moved with the recording head when it is displaced so that below the movable recording head always a uniform

Illumination exists. It is advantageous if the recording head is displaceable in a direction perpendicular to the surface of the slide element, so that a distance between the object and the recording head is variable. This can be used for setting various optical parameters, for example for setting a subject width, wherein the

Object distance is defined as a distance between the object and a lens of the optical pickup system. The optical recording system according to the invention a

Have drive element to the recording head to

relocate. According to the invention, the foregoing

described control system for controlling the

Drive element of the recording head to be formed.

According to a particularly advantageous embodiment of the invention, it can be provided that the sensor element can be displaced in the direction of an image path in or on the image path

Recording head is arranged so that a distance between the sensor element and the mirror element is changeable. As a result, different optical parameters can be set, for example an image width of the optical recording system, the image width being a distance between a lens and the sensor element

is defined. The optical recording system can

According to the invention, a drive element to displace the sensor element within the receiving head. According to the invention, the above-described

Be formed control system for driving the drive element of the sensor element.

Preferably, the optical recording system has at least one pivotable light emitter, wherein the optical recording system has a control system and wherein the control system is adapted to a

Verschwenkungsstellung of the light emitter depending on the observation angle at which the object is detected to adjust. This will allow the object to be placed under which

Observation angle the object is detected to illuminate differently. For example, a

Verschwenkungsstellung one or more light emitters are changed when the sensor element is pivoted or displaced. It has been found that in this case images of the object can be detected, from which a particularly realistic three-dimensional image of the object can be calculated. It is particularly preferred if the light emitters are always aligned in such a way that light rays impinging on the object impinge on the object at the angle of observation. Further advantageous embodiments of the invention are illustrated in the drawings. Showing:

Fig. 1 is a schematic representation of an optical

Recording system in a front view,

Fig. 2 is a schematic representation of the optical

Recording system of Figure 1 in a front view with a changed orientation of the sensor element.

Fig. 3 is a schematic representation of the optical

1 and 2 in a front view with a changed position of the sensor element and FIG. 4 is a schematic representation of an alternative embodiment of the optical according to the invention

Recording system in a side view.

Fig. 1 shows a schematic representation of an optical pickup system 1 in a front view. The optical

Recording system 1 has a slide element 2 which is connected to a support element 3. The support element 3 is connected to a receiving head 4. One on the

Object carrier element 2 located object can by means of a conveying mechanism, not shown along a

Surface 5 of the slide element 2 are moved. The object can thus be guided past the recording head 4 so that different sections of the object can be detected by a sensor element 6 arranged in the recording head 4. The recording head 4 is shown in a sectional view, so that in it arranged sensor element 6 is visible. In which

Sensor element 6 is a line scan camera.

The slide element 2 has an illumination system with two light emitters 7. The light emitters 7 can be the object arranged on the object carrier element 2

illuminate. The light beam 8 runs along a

Image path between the object and the sensor element 6. The path of a light beam 8 from the direction of

Slide member 2 to the sensor element 6 is

exemplified. The light beam 8 enters the pickup head 4 through a transparent portion of the pickup head 4 and is reflected by a mirror element 9 at an angle of 45 degrees toward the sensor element 6, so that the light beam 8 from the

Sensor element 6 can be detected.

The receiving head 4 is displaceably mounted on the support member 3, so that the receiving head 4 can be displaced in a direction perpendicular to the surface 5 of the slide member 2. In the recording head 4, a lens 10 is arranged. An object width of the taking optical system 1 is determined by a distance between the object and the lens 10. The object width can be changed by the receiving head 4 in a direction perpendicular to the surface 5 of the

Slide element 2 is displaced. In that

Receiving head 4 is further a rail member 11

arranged, which is connected to the sensor element 6.

Fig. 2 shows a schematic representation of the optical pickup system 1 of FIG. 1 in a front view with a changed orientation of the sensor element 6. It can be seen that due to the changed orientation of the sensor element 6, a on the slide element 2

arranged object under a different one

Observation angle can be detected. Since the light beam 8 does not pass through the lens 10 in the center, it is refracted by it.

FIG. 3 shows a schematic representation of the optical pickup system 1 according to FIGS. 1 and 2 in a front view with a changed position of the sensor element 6. The sensor element 6 is arranged so as to be displaceable on the rail element 11 within the pickup head 4. The

Rail element 11 allows a displacement of the

Sensor element 6 transverse to the image path. The light beam 8 does not pass through the lens 10 in the center and is therefore broken by it. This can be a on the

Object carrier element 2 arranged object can be detected at a different observation angle.

Fig. 4 shows a schematic representation of a

alternative embodiment of the invention

optical recording system 1 in a side view. In this embodiment of the optical pickup system 1, a support member 3 carries a pickup head 4 which is disposed above a slide member 2. In that

Receiving head 4, a sensor element 6 is arranged, which is displaceable along a rail member 11. Further, in the receiving head 4 is a pivotable

Mirror element 9 and a lens 10 is arranged. To the

Support element 3, a radiator support member 12 is attached, which has a plurality of light emitters 7. One of one on the Slide 2 located, not shown object

Outgoing light beam 8 runs at the

Radiator support element 12 in the direction of the

Recording head 4. The light emitters 7 illuminate one

Surface 5 of the slide member 2 and move with the support member 3 with, when the support member 3 is displaced relative to the slide member 2.

E N G L I S H E S T E

I. Optical recording system

2. O jektträgerelement

3rd support element

4. Recording head

5. Surface

6. Sensor element

7. Light emitter

8. Beam of light

9. mirror element

10. Lens

II. Rail element

12. radiator support element

Claims

P A T E N T A N S P R E C H E

1. Optical recording system (1) for detecting a

Three-dimensional surface structure of an object, wherein the optical pickup system a

Recording head (4) and a slide member (2), wherein the receiving head (4) spaced from the slide member (2) is arranged, wherein in or on the receiving head (4) a sensor element (6) for

Optical information recording is arranged, and wherein the optical pickup system (1) is formed so that an observation angle at which the optical pickup system (1) detects the object is adjustable, characterized in that in or on the recording head (4) a Mirror element (9) for reflecting an image of the object in the direction of the sensor element (6) is arranged, wherein the

Sensor element (6) is arranged so that it can detect an image of the object reflected by the mirror element (9).

2. Optical recording system (1) according to claim 1, characterized in that the sensor element (6) and the mirror element (9) in a common plane

are arranged, wherein the common plane is aligned parallel to a plane through a

Surface (5) of the slide element (2) is defined.

3. Optical recording system (1) according to one of

preceding claims, characterized in that the sensor element (6) is rotatable, so that the observation angle at which the optical

Recording system (1) detects the object is adjustable.

Optical recording system (1) according to one of

preceding claims, characterized in that the sensor element (6) is displaceable transversely to an image path, so that the observation angle at which the optical pickup system (1) detects the object,

is adjustable.

Optical recording system (1) according to one of

preceding claims, characterized in that the optical pickup system (1) at least one

Lens (10) which is arranged in an image path between the sensor element (6) and the mirror element (9).

Optical recording system (1) according to one of

Lens (10) which is arranged in an image path between the mirror element (9) and the slide member (2).

Optical recording system (1) according to one of claims 5 or 6, characterized in that the at least one lens (10) along a portion of the image path is displaceable and / or out of the image path

is pivotable.

8. Optical recording system (1) according to claim 7, characterized in that the optical recording system (1) has a drive element for displacement and / or for

Has pivoting of at least one lens (10).

9. Optical recording system (1) according to one of

preceding claims, characterized in that the sensor element (6) in the receiving head (4)

is arranged, wherein the receiving head (4) is sealed dust-tight.

10. Optical recording system (1) according to one of

preceding claims, characterized in that the optical pickup system (1) comprises an infrared filter arranged in an image path between the

Sensor element (6) and the slide element (2) is arranged.

11. Optical recording system (1) according to one of

preceding claims, characterized in that the optical pickup system (1) a polarizing filter

which is in a picture path between the

Sensor element (6) and the slide element (2) is arranged.

12. Optical recording system (1) according to claim 11, characterized in that the polarizing filter is rotatable, is displaceable along a portion of the image path and / or can be pivoted out of the image path.

13. Optical recording system (1) according to one of

preceding claims, characterized in that the optical recording system (1) is designed so that the slide element (2) and the

Recording head (4) are displaceable relative to each other.

An optical pickup system (1) according to claim 13, characterized in that the slide member (2) is displaceable in a direction parallel to a surface (5) of the slide member (2), or wherein the slide member (2) has a conveyor mechanism for displacing the object on the slide Object carrier element (2), so that the object can be guided past the receiving head (4).

An optical pickup system (1) according to claim 13, characterized in that the pickup head (4) is arranged in a direction parallel to a surface (5) of the

Slide element (2) is displaced, so that the receiving head (4) can be moved past the object.

Optical recording system (1) according to one of

preceding claims, characterized in that the receiving head (4) perpendicular to the surface (5) of the slide member (2) is movable, so that a distance between the object and the receiving head (4) is variable.

Optical recording system (1) according to one of

preceding claims, characterized in that the sensor element (6) arranged displaceable in the direction of an image path in or on the receiving head (4) is, so that a distance between the sensor element (6) and the mirror element (9) is variable.

Optical recording system (1) according to one of

previous claims, characterized in that the optical recording system (1) at least one pivotable light emitter (7), wherein the optical recording system (1) comprises a control system and wherein the control system is adapted to a Verschwenkungsstellung the light emitter (7) in

Dependence on the observation angle under which the object is detected to adjust.