DE102011106688B4 - Visualization device and method for visualizing a spatially resolved measurement result - Google Patents

Abstract

Visualization device (1) with a measuring device (2) which has an IR detector (3) and a measuring beam path (4) and which is used to create a spatially resolving measurement result from along the measuring beam path (4) in a non-visible spectral range of an object ( 5) detected measuring radiation is set up, and with a projector (7) projecting in the visible spectral range, with a beam deflector (9) being arranged in the measuring beam path (4) and / or in the projection beam path (8), through which the projection beam path (8) between the The beam deflector (9) and the object (5) are brought to coincide with the measuring beam path (4), characterized in that the beam deflector (9) is designed as a dichroic mirror, that the visualization device (1) has a data processing unit (6) which is set up to derive an image from the spatially resolving measurement result which visualizes the recorded measurement result in two dimensions, w whether the projector (7) is set up to project the derived image in the visible spectral range along a projection beam path (8) onto the object (5).

Description

The invention relates to a visualization device with a measuring device which has a detector and a measuring beam path and which is set up to create a spatially resolving measurement result from measuring radiation detected by an object along the measuring beam path in a non-visible spectral range, and with a projector projecting in the visible spectral range, wherein the projector is set up to project an image derived from the measurement result in the visible spectral range along a projection beam path onto the object.

The invention also relates to a method for visualizing a spatially resolved measurement result, wherein measurement radiation from an object is captured along a measurement beam path in a non-visible spectral range and a spatially resolving measurement result is created from the captured measurement radiation, an image in a visible spectral range being derived from the measurement result and wherein the image is projected onto the object along a projection beam path.

Such a visualization device and such a method can be used to make the acquired spatially resolving measurement results directly visible on the examined object.

With such combined measuring devices and projectors, there is generally the problem that due to parallax, i.e. a distance between the optical axes of the respective devices, the projected image is not made to coincide with the original, i.e. the object, for all imaging distances between the projector and the object . The user can avoid this, for example, by always maintaining a fixed predetermined distance to the object during the measurement and projection, for which the projected image is brought into congruence with the object. However, this is impractical for many applications.

From the DE 10 2005 019 143 A1 a visualization device according to the preamble of claim 1 is known, in which a rotatable mirror can be moved back and forth between two positions, in the first position of the rotatable mirror the light reflected from an operating area is passed on in the direction of an image acquisition system and in the second position of the rotatable mirror, a signal generated by a projection system is projected into the operating area.

From the DE 10 2010 009 476 A1 A method and a device are known for the visualization of spatially resolved measurement results of properties not directly visible to the human eye, in which a property initially measured in a solid angle range by a measuring device from a distance is converted into a false color image by automated processing, which is sent to a display unit is transmitted and projected into a further solid angle range.

From the US 2009/0289950 A1 a projector, an image projection method and a head-up display device are known in which a light deflector deflects a light beam in a scanning direction and a direction perpendicular to the scanning direction.

WO 2009/031 094 A1 shows a projector for projecting a video image, for example a television or computer, with eye detection in order to protect people walking through the image. For this purpose, the projector has an IR laser whose beam is inserted into the projection beam via a dichroic mirror. The IR laser light reflected from the object reaches an IR detector via this dichroic mirror. The projection is then dimmed or omitted at the point of the eyes.

The US 2009/0 147 224 A1 describes a projection device similar to the aforementioned document, in which, however, not only eyes, but entire people are recognized and omitted in the projection image.

The invention is based on the object of simplifying the handling of a visualization device.

In order to achieve this object, the features of claim 1 are provided according to the invention in a visualization device of the type mentioned at the beginning. In particular, it is therefore proposed that a beam deflector is arranged in the measuring beam path and / or in the projection beam path, by means of which the projection beam path between the beam deflector and the object is made to coincide with the measuring beam path. The advantage here is that no parallax can occur between the beam paths of the measuring device and the projector, so that the projected image can easily be brought to coincide with the object for almost any imaging distances.

In this context, a spatially resolved measurement is generally understood to be a measurement method which produces a two-dimensional pictorial arrangement of measurement values as the measurement result. Measurement radiation is preferably detected in a spectral range of the electromagnetic spectrum. The spatial resolution can be achieved in that the from different solid angle ranges on the Detector incident measurement radiation is measured separately.

The optical beam deflector according to the invention has the effect that the projection beam path behind the beam deflector, i.e. between the beam deflector and the object, is brought into congruence with the measuring beam path in front of the beam deflector, i.e. also between the beam deflector and the object. The beam deflector acts in a similar way to a beam splitter, with the only difference that in the case of the beam deflector, the direction of propagation of the projection rays of the projection beam path is oriented opposite to the direction of propagation of the measurement radiation along the measurement beam path, while in the known beam splitters the divided beam paths are traversed in the same direction.

According to the invention, the beam deflector is designed as a dichroic mirror. A dichroic mirror is understood here to be a mirror which is at least predominantly transparent to electromagnetic radiation in one spectral range and at least predominantly reflective for electromagnetic radiation in a further spectral range. The advantage here is that the measurement beam path can be easily combined with the projection beam path between the beam deflector and the object, for example by making the beam deflector completely or predominantly reflective in the visible spectral range and completely or predominantly transparent in the non-visible spectral range. This can be achieved, for example, by choosing a special material or by using a dichroic grid with a corresponding grid spacing.

According to the invention, the visualization device has a data processing unit, which is set up to derive an image from the spatially resolving measurement result, which visualizes the recorded measurement result in two dimensions, the projector being set up to project the derived image in the visible spectral range along a projection beam path onto the object.

According to the invention, the detector is designed as an IR detector. Thermal images can thus be recorded in a simple manner and displayed on the examined object. This has the advantage that heat sources or other conspicuous temperature distributions on the object can be recognized and made visible directly from a distance.

For particularly precise projection of the image, it can be provided that the projector is designed as a laser projector for colored or monochrome laser light. The advantage here is that the projected image remains sharp over long distances without the projection beam path having to be optically tracked.

In one embodiment of the invention it can be provided that an optical element is arranged in the measuring beam path between the beam deflector and the detector, with which an opening angle and / or a focus of the measuring beam path can be set. The advantage here is that an examined area on the object to be examined can be selected with the optical element or that the resolution of the spatially resolving measurement result can be changed by focusing, that is, focusing, with the optical element.

Alternatively or additionally, it can be provided that an optical element is arranged in the projection beam path between the beam deflector and the projector, with which an opening angle and / or a focus of the projection beam path can be set. Thus, by means of the optical element, the image size can be matched to the object size or the projected image can be focused.

The optical element is preferably arranged between the beam deflector and the projector.

In one embodiment of the invention, it can be provided that an optical element which acts optically in the visible and in the non-visible spectral range is arranged in the projection beam path, with which an opening angle and / or a focus of the projection beam path and an opening angle and / or a focus of the Measuring beam path are adjustable. The optical element is preferably set up in such a way that the opening angles and / or foci can be set together. This has the advantage that the selection of the measurement area on the examined object and / or the focusing of the measurement radiation can be carried out in a simple manner by appropriate adjustment of the projector. The optical element is preferably arranged between the beam deflector and the object. The advantage here is that the optical element is arranged in the area in which the measuring beam path and the projection beam path spatially coincide.

In order to be as independent as possible of the prevailing ambient conditions such as lighting conditions and the like when creating the spatially resolving measurement result, one embodiment of the invention can provide that a radiation source for irradiating and / or illuminating the object with radiation for creating the spatially resolving Measurement result is trained and set up. For example, the radiation source can be set up to generate the radiation subsequently measured in the non-visible spectral range. The radiation source can be integrated into the measuring device or formed separately from the measuring device.

In order to achieve the object, the features of claim 7 are provided according to the invention in a method of the type mentioned at the beginning. In particular, it is therefore proposed that measurement radiation from an object be captured along a measurement beam path in a non-visible spectral range and a spatially resolving measurement result generated from the captured measurement radiation, the measurement beam path and / or the projection beam path being deflected in this way with a beam deflector designed as a dichroic mirror / that the projection beam path is brought into congruence with the measuring beam path between the beam deflector and the object, and an image in a visible spectral range is derived from the measurement result and the image is projected onto the object along a projection beam path. The advantage here is that it is automatically ensured that the projected image is made to coincide with the examined object, i.e. that the individual components of the spatially resolved measurement result or the image derived therefrom are projected onto those parts of the examined object from which the associated measurement radiation ran out of. The user can thus easily assign the measurement results obtained to the respective parts of the examined object, which considerably simplifies the handling of a visualization device and the implementation of a method of the type mentioned at the beginning.

It can be provided that the projection beam path and the measuring beam path are operated simultaneously. The advantage here is that there is no need to interrupt the measurement during projection.

It can also be provided that the projection beam path and the measuring beam path are operated alternately. The advantage here is that a beam combination of the projection beam path and the measuring beam path can be implemented at least in the vicinity of the object to be examined with switchable beam deflectors.

It can be provided that the image is projected in a brightness-coded manner. The advantage here is that the visualized measurement result is not falsified by a colored background. Another advantage is that monochrome light can be used for projection. For example, green or red laser light has proven to be particularly favorable.

It can also be provided that the image is projected color-coded. The advantage here is that a higher information density is available compared to a projection that is merely brightness-coded.

In one embodiment of the invention it can be provided that the image is projected with a laser projector. The advantage here is that a divergence in the projection beam path can largely be avoided, so that the projected image automatically remains sharp even when the projection distance changes.

To match the projected image to the examined object, it can be provided that an opening angle and / or a focus of the projection beam path and an opening angle and / or a focus of the measuring beam path are set jointly or separately from one another. The setting is preferably carried out by optical elements arranged in the beam paths, for example diaphragms, lenses, mirrors, grids, beam shapers and / or similar elements that act optically in the respective spectral range.

In one embodiment of the invention, it can be provided that the object is irradiated or transilluminated with a radiation source in order to produce the spatially resolving measurement result. In this case, it can be provided that the or one measuring radiation reflected or transmitted by the object is recorded, for which the spatially resolving measurement result, which visualizes the recorded measurement result in two dimensions, is created. The object is preferably irradiated in that non-visible spectral range for which the spatially resolving measurement result is created. The advantage here is that the measurement radiation is available regardless of the prevailing or prevailing environmental conditions.

The invention will now be described in more detail with reference to exemplary embodiments, but is not limited to these exemplary embodiments. Further exemplary embodiments result from the combination of individual or multiple features of the patent claims with one another and / or with individual or multiple features of the exemplary embodiments.

• 1 eine erfindungsgemäße Visualisierseinrichtung in stark vereinfachter dreidimensionaler Schrägansicht,
• 2 eine stark vereinfachte Darstellung des Messstrahlengangs und des Projektionsstrahlengangs bei einer erfindungsgemäßen Visualisierungseinrichtung,
• 3 in einer Prinzipdarstellung die Anordnung eines optischen Elements zur gemeinsamen Einstellung des Öffnungswinkels und/oder des Fokus von Messstrahlengang und Projektionsstrahlengang,
• 4 die Anordnung von optischen Elementen zur separaten Einstellung von Öffnungswinkel und Fokus des Messstrahlengangs einerseits und des Projektionsstrahlengangs andererseits,
• 5 den Projektionsstrahlengang bei einem weiteren erfindungsgemäßen Strahlumlenker in stark vereinfachter Prinzipdarstellung und
• 6 den Messstrahlengang bei einem erfindungsgemäßen Strahlumlenker gemäß 5.

It shows:

• 1 a visualization device according to the invention in a greatly simplified three-dimensional oblique view,
• 2 a greatly simplified representation of the measuring beam path and the Projection beam path in a visualization device according to the invention,
• 3 in a schematic diagram of the arrangement of an optical element for the common setting of the opening angle and / or the focus of the measuring beam path and projection beam path,
• 4th the arrangement of optical elements for the separate setting of the opening angle and focus of the measuring beam path on the one hand and the projection beam path on the other hand,
• 5 the projection beam path in a further beam deflector according to the invention in a greatly simplified schematic diagram and
• 6th the measuring beam path according to a beam deflector according to the invention 5 .

1 shows in a greatly simplified schematic diagram to explain the invention a visualization device designated as a whole by 1.

The visualization device 1 has a measuring device not shown in detail in a manner known per se 2 which one in 2 visible detector 3 having.

On the measuring device 2 is a measuring beam path 4th designed and set up in such a way that one of an object to be examined 5 outgoing measuring radiation along the measuring beam path 4th detected and on the detector 3 is directed.

The measurement radiation can be natural or from the object 5 self-generated radiation from the object 5 be broadcast.

Alternatively, the measuring radiation can also come from other objects or from the measuring device 2 even sent out and at the object 3 reflected or transmitted radiation. For this purpose, a radiation source (not shown) can be present with which the object 5 is irradiated or transilluminated before or during the creation of the spatially resolving measurement result, so that the object 5 is excited to emit the measurement radiation.

This measuring radiation is at the detector 3 detected as a function of the angle, and the output signals of the detector 3 are converted into a spatially resolving measurement result in a manner known per se.

In the exemplary embodiment, the detector is 3 designed as an IR detector, and the detected measurement radiation is an IR radiation in the non-visible spectral range.

The detector 3 can for example be implemented in FPA technology or in scanner technology.

In the visualization device 1 is a data processing unit 6th arranged, which is not shown further to simplify the illustration.

The data processing unit 6th is set up by suitable programming so that an image is derived from the spatially resolving measurement result, which visualizes the recorded measurement result in two dimensions.

For example, this can be done by displaying the measurement result in a false color.

The visualization device 1 also has a projector 7th to project this image onto the object 5 on.

This is done on the projector 7th a projection beam path 8th formed, along which that in the data processing unit 6th generated image of the examined object 5 is thrown.

Around the projected image with the object 5 at least in a wide range of values independent of the spatial distance between the visualization device 1 and the object 5 to coincide, it is proposed according to the invention, the measuring beam path 4th and the projection beam path 8th at least near the object 5 to bring them to congruence in such a way that corresponding solid angle areas of the beam paths 4th , 8th lie on top of each other.

This is according to the invention by an in 2 visible beam deflector 9 achieved, which in the embodiment according to 2 in the measuring beam path 4th and in the projection beam path 8th is arranged.

The beam deflector 9 is designed as a dichroic mirror, which is essentially or completely transparent in the non-visible spectral range of the measurement radiation and in the visible spectral range of the projector 7th generated light is reflective.

For example, the beam deflector 9 also be designed as a dichroic grating.

In the embodiment shown, the beam deflector 9 the projection beam path 8th deflected in such a way that the measuring beam path 4th and the projection beam path 8th between the beam deflector 9 and the object 5 are brought to congruence.

In further exemplary embodiments, the reverse case is implemented in which the measuring beam path 4th deflected and the projection beam path 8th is left unchanged.

In the 2 shown equality of the opening angle of the measuring beam path 4th and the projection beam path 8th serves only to explain the inventive principle. Of course, the opening angle of the measuring beam path can also be used 4th larger than the opening angle of the projection beam path 8th be selected if, for example, only part of the captured measurement radiation is processed further to generate the image to be projected. The opening angle of the projection beam path 8th is then preferably completely in the opening angle of the measuring beam path 4th contain.

3 and 4th show two possibilities, such as the opening angle and / or the focus of the beam paths, in greatly simplified schematic representations 4th , 8th on each other and / or on the distance of the object to be examined 5 can be matched.

This is according to 3 in the measuring beam path 4th and in the projection beam path 8th between the beam deflector 9 and the object 5 an optical element 10 arranged, which acts optically both in the non-visible spectral range and in the visible spectral range in such a way that the respective opening angle and / or the respective focus of the measuring beam path 4th or the projection beam path 8th is changeable.

The optical element 10 includes, depending on the respective requirements, lens arrangements and / or diaphragm arrangements and / or mirror arrangements and / or optical grating arrangements.

The optical element 10 can be set manually, but can also be used with a distance measuring device to measure the distance to the object 5 be coupled in order to be able to automatically adjust the focus and / or opening angle.

With the arrangement according to 4th are two separate optical elements 11 , 12 intended.

Here is the optical element 11 in the measuring beam path behind the beam deflector 9 , i.e. between the beam deflector 9 and detector 3 , arranged. The optical element 11 acts in the non-visible spectral range of the detector 3 optically such that the opening angle and / or the focus of the measuring beam path 4th by adjusting the optical element 11 is changeable.

The optical element 12 is, however, in the projection beam path 8th arranged. The optical element 12 works optically in the visible spectral range in such a way that the opening angle and / or the focus of the projection beam path 8th by adjusting the optical element 12 is changeable.

For coordination between the measuring beam path 4th and projection beam path 8th a synchronization device, not shown, is provided with which the setting of the optical element 11 with the setting of the optical element 12 is coupled.

5 and 6th show a further embodiment of a beam deflector according to the invention 9 with a visualization device 1 according to 1 .

In this embodiment, the beam deflector is 9 designed as a switchable mirror.

5 shows the switching state in which the projection beam path 8th to operate on the object 5 is diverted.

6th however, shows the switching state of the beam deflector 9 , in which the measuring beam path 4th for capturing the measuring beams in the detector 3 is operated. The beam deflector is in this switching state 9 designed to be permeable.

Because the beam deflector 9 in its switching state according to 6th that from the projector 7th Let emitted light pass through and not onto the object 5 would deflect, the projector will 7th preferably operated only when the beam deflector 9 in the switching state according to 5 is. Alternatively, if the projector is in continuous operation 7th a light source behind the beam deflector 9 be arranged.

The detector 3 and the projector 7th are therefore synchronous with the switching of the beam deflector in the exemplary embodiment 9 operated alternately, i.e. read out or loaded with projection data.

A common optical element 10 serves analogously to the situation in 3 for the common setting of the aperture angle and focus for both beam paths 4th , 8th .

Alternatively, an arrangement according to FIG 4th with separate optical elements 11 , 12 in the embodiment according to 5 and 6th predictable.

At the projector 7th In the exemplary embodiments presented, it is a laser projector which generates a pixelated image in a brightness-coded manner with red laser light.

With the visualization device 1 and more precisely with the detector 3 is therefore along the measuring beam path 4th Measurement radiation in a non-visible spectral range from the object 5 detected.

This acquired measuring radiation is converted into a data processing unit 6th a spatially resolving measurement result is created.

This measurement result is also in the data processing unit 6th converted into an image which shows the required information of the spatially resolving measurement result in a visible spectral range.

The image thus calculated is sent to the projector 7th fed, which it along the projection beam path 8th on the object 5 projected.

To get into the visualization device 1 incoming measuring beam path 4th with the one from the visualization device 1 exiting projection beam path 8th The projection beam path is to be brought into correspondence or congruence in such a way that solid angle regions corresponding to one another in terms of content overlap 8th and / or in further exemplary embodiments the measuring beam path 4th with a beam deflector 9 diverted.

The visualization device 1 further has at least one actuating element 13 with which the measurement on the detector 3 and / or the projection by the projector 7th can be triggered and / or with which the optical elements 10 , 11 , 12 are adjustable.

With the visualization device 1 is suggested in the measuring beam path 4th of a detector 3 and / or in the projection beam path 8th a projector 7th Beam deflector 9 to be arranged in such a way that one with the projector 7th projected image resulting from one with the detector 3 recorded spatially resolving measurement result of an object 5 is derived on this object 5 is thrown back and brought into congruence with this.

Claims (9)

Visualization device (1) with a measuring device (2) which has an IR detector (3) and a measuring beam path (4) and which is used to create a spatially resolving measurement result from along the measuring beam path (4) in a non-visible spectral range of an object ( 5) detected measuring radiation is set up, and with a projector (7) projecting in the visible spectral range, with a beam deflector (9) being arranged in the measuring beam path (4) and / or in the projection beam path (8), through which the projection beam path (8) between the The beam deflector (9) and the object (5) are brought to coincide with the measuring beam path (4), characterized in that the beam deflector (9) is designed as a dichroic mirror, that the visualization device (1) has a data processing unit (6) which is set up to derive an image from the spatially resolving measurement result which visualizes the recorded measurement result in two dimensions, wherein the projector (7) is set up to project the derived image in the visible spectral range along a projection beam path (8) onto the object (5). Visualization device (1) Claim 1 , characterized in that the projector (7) is designed as a laser projector for colored or monochrome, in particular red, laser light. Visualization device (1) according to one of the Claims 1 or 2 , characterized in that an optical element (10, 11, 12) is arranged in the measuring beam path (4), with which an opening angle and / or a focus of the measuring beam path (4) can be set, and / or that in the projection beam path (8) , an optical element (10, 11, 12) is arranged with which an opening angle and / or a focus of the projection beam path (8) can be set. Visualization device (1) according to one of the Claims 1 to 3 , characterized in that in the projection beam path (8), an optical element (10) which acts optically in the visible and in the non-visible spectral range is arranged, with which an opening angle and / or a focus of the projection beam path (8) and an opening angle and / or a focus of the measuring beam path (4) can be set, and / or that a radiation source for irradiating and / or transilluminating the object (5) with radiation in the non-visible spectral range is designed and set up to produce the spatially resolving measurement result. Visualization device (1) Claim 3 or 4th , characterized in that the optical element (10, 11, 12) is arranged between the beam deflector (9) and the detector (9). Method for the visualization of a spatially resolved measurement result, wherein measurement radiation from an object (5) is detected along a measurement beam path (4) in a non-visible spectral range and a spatially resolved measurement result is created from the detected measurement radiation, the measurement beam path (4) and / or the projection beam path (8) is deflected with a beam deflector (9) designed as a dichroic mirror / that the projection beam path (8) is made to coincide with the measuring beam path (4) between the beam deflector (9) and the object (5), characterized in that an image in a visible spectral range is derived from the measurement result and the image is along a projection beam path (8) is projected onto the object (5). Procedure according to Claim 6 , characterized in that the projection beam path (8) and the measuring beam path (4) are operated simultaneously or that the projection beam path (8) and the measuring beam path (4) are operated alternately. Procedure according to Claim 6 or 7th , characterized in that the image is brightness-coded and / or color-coded projected and / or that the image is projected with a laser projector (7). Method according to one of the Claims 6 to 8th , characterized in that an opening angle and / or a focus of the projection beam path (8) and an opening angle and / or a focus of the measuring beam path (4) are set jointly or separately from one another and / or that the object (5) is used to create the spatially resolving measurement result is irradiated or transilluminated with a radiation source and that a measurement radiation reflected or transmitted by the object (5) is recorded, for which the spatially resolving measurement result, which visualizes the recorded measurement result in two dimensions, is created.

Images