DE102011106688A1 - Visualization device for visualizing spatially resolved measurement result, comprises projector that projects image derived from measurement result in visible spectrum along projection beam path to object - Google Patents

Abstract

The device (1) has a measuring instrument (2) comprising measurement beam path (4) for creation a spatially resolving measurement result along measurement beam path in non-visible spectral range of an object (5). A beam deflector (9) is arranged in measurement beam path and/or in projection beam path (8), through which projection beam path between beam deflector and object is made ??to coincide with measuring beam path. The projector (7) is provided for projection of image derived from measurement result in visible spectrum along a projection beam path to the object. An independent claim is included for a method for visualizing spatially resolved measurement result.

Description

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

The invention further relates to a method for visualizing a spatially resolved measurement result, wherein measuring radiation is detected by an object along a measuring beam path in a non-visible spectral range and a spatially resolving measurement result is produced from the detected measuring radiation, wherein an image in the visible spectral range is 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 visualize the acquired spatially resolving measurement results directly on the examined object.

In such combined measuring devices and projectors there is generally the problem that due to a parallax, ie a distance of the optical axes of the respective devices from each other, the projected image is not brought to all imaging distances between the projector and object with the original, so the object , For example, the user can avoid this by always maintaining a fixed distance to the object during measurement and projection for which the projected image is aligned with the object. However, this is impractical for many applications.

The invention has for its object to simplify the handling of a visualization device.

To achieve this object, a visualization device of the type mentioned is provided according to the invention that in the measurement beam path and / or in the projection beam path, a beam deflector is arranged, through which the projection beam path between the beam deflector and the object with the measurement beam path is brought to coincide. The advantage here is that between the beam paths of the measuring device and the projector no parallax can occur, so that in a simple way the projected image with the object for almost any imaging distances can be brought to cover.

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

The optical beam deflector according to the invention causes the projection beam path behind the beam deflector, ie between the beam deflector and the object, to coincide with the measuring beam path in front of the beam deflector, ie likewise between the beam deflector and the object. The beam deflector acts in this case similar to a beam splitter, with the only difference that in the beam deflector, the propagation direction of the projection beams of the projection beam is opposite to the direction of propagation of the measuring radiation aligned along the measuring beam path, while in the known beam splitters, the split beam paths are traversed in the same direction.

For example, it can be provided that the beam deflector is designed as a dichroic mirror. In this case, a dichroic mirror is understood as meaning a mirror which is at least predominantly transparent to electromagnetic radiation in one spectral range and at least predominantly reflective to electromagnetic radiation in a further spectral range. The advantage here is that in a simple way a combination of the measuring beam path with the projection beam path between the beam deflector and object is possible, for example, the beam deflector in the visible spectral range is completely or predominantly reflective and formed completely or predominantly transparent in the non-visible spectral range. This can be achieved for example by special choice of material or by using a dichroic grating with a corresponding grid spacing.

In one embodiment of the invention can be provided that the beam deflector is designed as electrically or mechanically switchable mirror. The advantage here is that a complex selection of materials to achieve the desired optical properties is dispensable. Preferably, the mirror is designed to be reflective both in the non-visible spectral range and in the visible spectral range. By the Switchability, the measurement beam path and projection beam path can be operated alternately, so that a different beam guidance for measurement beam path and projection beam path is easy to implement.

For example, it can be provided that the detector is designed as an IR detector. Thus, thermal images can be detected in a simple manner and displayed on the examined object. This has the advantage that heat sources or other conspicuous temperature distributions are made visible and visible on the object directly from a distance.

For particularly accurate projection of the image 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 must be tracked optically.

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

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

Preferably, the optical element is disposed between the beam deflector and the projector.

In one embodiment of the invention it can be provided that in the visible and in the non-visible spectral region optically acting optical element is arranged in the projection beam, with which an opening angle and / or focus of the projection beam and an opening angle and / or a focus of Measuring beam path are adjustable. Preferably, the optical element is arranged so that the opening angle and / or foci are adjustable together. This has the advantage that the selection of the measuring range on the object under examination and / or the focusing of the measuring radiation can be effected in a simple manner by appropriate adjustment of the projector. Preferably, the optical element is arranged between the beam deflector and the object. The advantage here is that the optical element is arranged in the region in which the measuring beam path and the projection beam path coincide spatially.

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

To solve the problem is provided according to the invention in a method of the type mentioned that the beam path and / or the projection beam path is / are deflected with a beam deflector so that the projection beam is brought to coincide with the measuring beam path between the beam deflector and the object. The advantage here is that it is automatically ensured that the projected image with the examined object is made to coincide, so that the individual components of the spatially resolved measurement result or the image derived therefrom are projected onto those parts of the examined object, of which the corresponding measurement radiation ran out of. Thus, the user can 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 in the introduction.

It can be provided that the projection beam path and the measurement beam path are operated simultaneously. The advantage here is that no interruption of the measurement during the projection is necessary.

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

It can be provided that the image is projected brightness-coded. The advantage here is that the visualized measurement result is not falsified by a colored background. Another advantage is that monochromatic 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 color-coded projected. The advantage here is that a higher information density compared to a merely brightness-coded projection is available.

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

In order to tune the projected image to the examined object, it may be provided that an aperture angle and / or a focus of the projection beam path and an aperture angle and / or a focus of the measurement beam path are set together or separately from one another. The adjustment preferably takes place by optical elements arranged in the beam paths, for example diaphragms, lenses, mirrors, gratings, beam shaper and / or the like elements which act optically in the respective spectral range.

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

The invention will now be described in more detail with reference to embodiments, but is not limited to these embodiments. Further embodiments result from combining one or more features of the claims with each other and / or with one or more features of the embodiments.

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 representation of the arrangement of an optical element for the common adjustment of the opening angle and / or the focus of the measuring beam path and the projection beam path,

4 the arrangement of optical elements for separate adjustment 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 in a further inventive beam deflector in a greatly simplified schematic representation and

6 the measuring beam path in a beam deflector according to the invention according to 5 ,

1 shows in a greatly simplified schematic representation to illustrate the invention as a whole with 1 designated visualization device.

The visualization device 1 has in a conventional manner a not shown in detail measuring device 2 which has a in 2 apparent detector 3 having.

On the meter 2 is a measuring beam path 4 designed and arranged such that one of an object to be examined 5 outgoing measuring radiation along the measuring beam path 4 captured and on the detector 3 is directed.

The measuring 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 self-sent and on the object 3 be reflected or transmitted radiation. For this purpose, a radiation source, not shown, may be present, with which the object 5 is irradiated or illuminated before or during the preparation of the spatially resolved measurement result, so that the object 5 is excited to the radiation of the measuring radiation.

This measuring radiation is at the detector 3 detected angle dependent, and the output signals of the detector 3 are converted in a conventional manner into a spatially resolving measurement result.

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

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

In the visualization device 1 is a data processing unit 6 arranged, which is not shown for simplicity of illustration.

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

For example, this can be done by a false color representation of the measurement result.

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

This is on the projector 7 a projection beam path 8th along which that in the data processing unit 6 generated image on 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 bring to coincidence, the invention proposes the measurement beam path 4 and the projection beam path 8th at least near the object 5 to bring such coincidence that corresponding solid angle ranges of the beam paths 4 . 8th superimposed.

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

The beam deflector 9 is here designed as a dichroic mirror, which in the non-visible spectral range of the measuring radiation is substantially or completely permeable and in the visible spectral range of the projector 7 formed light is reflective.

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

In the embodiment shown is by the beam deflector 9 the projection beam path 8th redirected so that the measuring beam 4 and the projection beam path 8th between the beam deflector 9 and the object 5 are brought to cover.

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

In the 2 shown equality of the opening angle of the measuring beam path 4 and the projection beam path 8th only serves to explain the inventive principle. Of course, also the opening angle of the measuring beam path 4 greater than the opening angle of the projection beam path 8th be selected, for example, if only part of the detected measurement radiation is further processed to produce 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 4 contain.

3 and 4 show in simplified schematic representations two options, such as the opening angle and / or the foci of the beam paths 4 . 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 4 and in the projection beam path 8th between the beam deflectors 9 and the object 5 an optical element 10 arranged, which optically acts both in the non-visible spectral range as well as in the visible spectral range such that the respective opening angle and / or the respective focus of the measuring beam path 4 or the projection beam path 8th is changeable.

The optical element 10 For this purpose, depending on the respective requirements, lens arrangements and / or diaphragm arrangements and / or mirror arrangements and / or optical grid arrangements.

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

In the arrangement according to 4 are two separate optical elements 11 . 12 intended.

Here is the optical element 11 in the measuring beam path behind the beam deflector 9 , so between beam deflector 9 and detector 3 arranged. The optical element 11 acts here 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 4 by adjusting the optical element 11 is changeable.

The optical element 12 is in contrast in the projection beam path 8th arranged. The optical element 12 acts optically in the visible spectral range such that the aperture angle and / or the focus of the projection beam path 8th by adjusting the optical element 12 is changeable.

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

5 and 6 show a further inventive embodiment of a beam deflector 9 at a visualization device 1 according to 1 ,

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

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

6 on the other hand shows the switching state of the beam deflector 9 , in which the measuring beam path 4 for detecting the measuring beams in the detector 3 is operated. In this switching state is the beam deflector 9 permeable.

Because the beam deflector 9 in its switching state according to 6 that from the projector 7 let emitted light and not on the object 5 will redirect the projector 7 preferably only operated when the beam deflector 9 in the switching state according to 5 is. Alternatively, during a continuous operation of the projector 7 a light source behind the beam deflector 9 be arranged.

The detector 3 and the projector 7 Therefore, in the embodiment, synchronous with the switching of the beam deflector 9 alternately operated, that is read out or loaded with projection data.

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

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

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

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

From this detected measurement radiation is in a data processing unit 6 created a spatially resolving measurement result.

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

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

To the in the visualization device 1 incoming measuring beam path 4 with the from the visualization device 1 emerging projection beam path 8th to bring such coincidence or coincidence that cover each other in terms of content corresponding solid angle ranges, the projection beam path 8th and / or in further embodiments of the measuring beam path 4 with a beam deflector 9 diverted.

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

At the visualization device 1 is proposed in the measuring beam path 4 a detector 3 and / or in the projection beam path 8th of a projector 7 beam deflector 9 arrange such that one with the projector 7 projected image, which is one with the detector 3 recorded spatially resolving measurement result of an object 5 is derived on this object 5 thrown back and brought to coincide with this.

Claims (10)

Visualization device ( 1 ) with a measuring device ( 2 ), which is a detector ( 3 ) and a measuring beam path ( 4 ) and which for creating a spatially resolving measurement result from along of 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 projecting in the visible spectral range ( 7 ), where the projector ( 7 ) for projecting an image derived from the measurement result in the visible spectral range along a projection beam path ( 8th ) on the object ( 5 ), characterized in that in the measuring beam path ( 4 ) and / or in the projection beam path ( 8th ) a beam deflector ( 9 ) is arranged, through which the projection beam path ( 8th ) between the beam deflector ( 9 ) and the object ( 5 ) with the measuring beam path ( 4 ) is brought to coincidence. Visualization device ( 1 ) according to claim 1, characterized in that the beam deflector ( 9 ) is designed as a dichroic mirror and / or that the beam deflector ( 9 ) is designed as an electrically or mechanically switchable mirror. Visualization device ( 1 ) according to claim 1 or 2, characterized in that the detector ( 3 ) is designed as an IR detector. Visualization device ( 1 ) according to one of claims 1 to 3, 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 claims 1 to 4, characterized in that in the measuring beam path ( 4 ), preferably between the beam deflector ( 9 ) and the detector ( 9 ), an optical element ( 10 . 11 . 12 ) is arranged, with which an opening angle and / or a focus of the measuring beam path ( 4 ) is adjustable, and / or that in the projection beam path ( 8th ), preferably between the beam deflector ( 9 ) and the projector ( 8th ), an optical element ( 10 . 11 . 12 ) is arranged, with which an opening angle and / or a focus of the projection beam path ( 8th ) is adjustable. Visualization device ( 1 ) according to one of claims 1 to 5, characterized in that in the projection beam path ( 8th ), preferably between the beam deflector ( 9 ) and the object ( 5 ), an optically active optical element in the visible and in the non-visible spectral region ( 10 ) is arranged, with which an opening angle and / or a focus of the projection beam path ( 8th ) and an opening angle and / or a focus of the measuring beam path ( 4 ) are preferably adjustable together, and / or that preferably in the measuring device ( 2 ) integrated radiation source for irradiation and / or fluoroscopy of the object ( 5 ) is designed and set up with radiation in the preferably non-visible spectral range for generating the spatially resolving measurement result. Method for visualizing a spatially resolved measurement result, wherein along a measuring beam path ( 4 ) in a non-visible spectral range measuring radiation from an object ( 5 ) and a spatially resolving measurement result is produced from the acquired measurement radiation, an image in the visible spectral range being derived from the measurement result, and the image being measured along a projection beam path (FIG. 8th ) on the object ( 5 ) is projected, characterized in that the measuring beam path ( 4 ) and / or the projection beam path ( 8th ) with a beam deflector ( 9 ) is deflected in such a way that the projection beam path ( 8th ) with the measuring beam path ( 4 ) between the beam deflector ( 9 ) and the object ( 5 ) is brought to coincidence. Method according to claim 7, characterized in that the projection beam path ( 8th ) and the measuring beam path ( 4 ) or that the projection beam path ( 8th ) and the measuring beam path ( 4 ) are operated alternately. A method according to claim 7 or 8, characterized in that the image is brightness-coded and / or color-coded projected and / or that the image with a laser projector ( 7 ) is projected. Method according to one of claims 7 to 9, characterized in that an opening angle and / or a focus of the projection beam path ( 8th ) and an opening angle and / or a focus of the measuring beam path ( 4 ) are set together or separately from one another and / or that the object (to be produced in order to produce the spatially resolving measurement result ( 5 ) is irradiated or irradiated with a radiation source, preferably in the non-visible spectral range, and that one of the object ( 5 ) reflected or transmitted measuring radiation is detected, to which the spatially resolving measurement result is created.

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