Arrangement and system for evaluating an optical object and lighting device for illuminating an optical object

Abstract

Lighting device (3) for the ring-like illumination of an optical object, in particular an optical lens, in particular a spectacle lens (2), wherein the lighting device has a printed circuit board (3.1) on which a plurality of LEDs (3.2) are arranged, wherein the lighting device, in particular the LEDs, is or are designed to emit a, in particular continuous, light spectrum with a color rendering index of greater than or equal to 95, in particular greater than or equal to 98.

Description

The present invention relates to an arrangement and a system for evaluating an optical object and to a lighting device for illuminating an optical object, in particular for the arrangement and the system.It is an object of the present invention to provide an arrangement(s), preferably improved arrangement(s), for evaluating an optical object or a lighting device for illuminating an optical object.This object is achieved in particular by a lighting device having the features of claim 1 or an arrangement having the features of claim 7 or a system having the features of claim 13. The dependent claims relate to advantageous refinements.According to a (first) aspect of the present invention, a lighting device which is provided or configured for, respectively, ring-like, in particular ring-shaped, illumination of an optical object, in one embodiment an optical lens, in one development a spectacle lens, is preferably used for checking the optical object, in one embodiment for checking a reflection or reflection characteristic and / or a transmission or transmission characteristic of the optical object, has a printed circuit board.In one embodiment, the printed circuit board is integral or has a plurality of segments, preferably circular or circular ring segments. A single-piece printed circuit board advantageously has high stability; a printed circuit board constructed from a plurality of segments can advantageously be produced and / or repaired.In one embodiment, the lighting device is configured in an annular manner, in particular in an annular manner. Additionally or alternatively, in one embodiment, the printed circuit board is configured in an annular manner, in particular in an annular manner. Additionally or alternatively, in one embodiment, the printed circuit board is arranged within the lighting device and / or in a ring-like manner, in particular in a ring-like manner. As a result, in each case, in particular in combination of two or more of these features, a compact and / or stable lighting device and / or a ring-like, in particular ring-shaped, illumination can be realized in a simple and / or reliable manner.In the present case, a ring-like or ring-shaped illumination is understood in particular to mean an illumination of an (upper) surface of the optical object in such a way that as a result a circular ring-like or ring-shaped light trace or light trace is projected or illuminated onto this (r) surface, wherein this light trace or light trace or light trace is at least partially reflected or visible or reflected on this surface and / or this (upper) surface of the optical object is at least partially transmitted or see through or penetrates. This is particularly advantageous in particular for testing optical lenses, in particular spectacle lens lenses, in particular for testing a reflection characteristic or a reflection behavior and / or a transmission characteristic or a transmission behavior.According to one embodiment of the present invention, a plurality, in one development a plurality, of light-emitting diodes (LEDs) is arranged on, preferably on, the printed circuit board.In one embodiment, the LEDs are arranged within the lighting device and / or in a ring-like manner, in particular in a ring-like manner. As a result, a compact and / or stable lighting device and / or a ring-like, in particular ring-shaped, illumination can be realized in an advantageous manner and / or in a simple and / or reliable manner.According to one embodiment of the present invention, the lighting device emits / emits, in one embodiment, the LEDs emit / are configured or / are configured for this purpose, preferably at least in the visible range, continuous or quasicontinuous and / or, at least substantially, complete light spectrum at a high color rendering index which is greater than or equal to 95, preferably greater than or equal to 98.As a result, illumination, which is particularly advantageous in particular for checking the optical object, can be realized.The color rendering index is in one embodiment the CRI ("Colour Rendering Index") or the color rendering index R a or R e, in one embodiment based on the first eight, 12 or 14 test colors according to DIN and / or according to CIE 13.2 and / or DIN 6169 and / or European Regulation 1194 / 2012.In one embodiment, two or more, preferably all, LEDs have the same light intensity. Additionally or alternatively, in an embodiment, the LEDs are arranged on, in particular on, the circuit board which is ring-like or ring-shaped in an embodiment in such a way that, in an embodiment along the circuit board and / or LEDs, a uniform light intensity can be generated or is generated. This allows illumination to be realized, which is advantageous in particular for checking the optical object.In one embodiment, a diffuser is arranged in each case in front of one or more, preferably in front of all, LEDs, which diffuses the light emitted by the respective LED or is configured for this purpose, in particular in order advantageously to achieve uniform illumination. Preferably, a satined optical element, particularly preferably an element made of satined plastic or mineral glass, in particular an element made of opaque white glass (commonly also referred to as milk glass), can be used for this purpose. Additionally or alternatively, in an embodiment, a diffuser is arranged on one side of the lighting device, in particular on one side of a housing of the lighting device, in the light outlet direction, which diffuses the light emitted by the LEDs or is configured for this purpose, in particular in order to advantageously achieve uniform lighting, wherein again preferably a satined optical element, particularly preferably an element made of satined plastic or mineral glass, in particular an element made of opaque white glass, can be used for this purpose. By means of such a diffuser, which preferably extends over the entire extent of the housing side in the light outlet direction of the lighting device, uniform lighting can be achieved in a particularly simple and cost-effective manner, in particular in comparison with the provision of individual diffusers in front of the respective LEDs.In one embodiment, at least one reflector is arranged on, preferably within, the lighting device, said reflector concentrating the light emitted by the LEDs in an emission direction or being configured or used for this purpose. This allows illumination to be realized, which is advantageous in particular for checking the optical object.In one embodiment, one or more, preferably all, of the LEDs are (in each case) sun-fast and / or single-chip LEDs and / or (in each case) have only one diode. This allows illumination to be realized, which is advantageous in particular for checking the optical object.In one embodiment, the light intensity and / or the light color can be regulated, the lighting device preferably has a regulating device for regulating the light intensity and / or light color of the lighting device, in one embodiment of the LEDs. This allows illumination to be realized, which is advantageous in particular for checking the optical object.By means of a lighting device according to the invention, in particular the use of LEDs with the stated color rendering index or sunfast and / or single-chip LEDs, it is advantageously possible to reduce, preferably avoid, undesirable interference and / or strong spectral peaks and / or to improve or enable, preferably, colorfast evaluation of spectacle lens lenses, in particular reflection color and / or the transmission behavior of, in particular coated, spectacle lens lenses or spectacle lens lens coatings. In this case, in particular in contrast to a flat or rod-shaped light source, the ring shape can enable a better or targeted distinction between front-surface and rear-surface reflections and / or improve an evaluation of a transmission behavior. Accordingly, in a development, the checking of the optical object, for which the lighting device is provided or set up or is used in an embodiment, is based on a reflection, in particular a different reflection, on a front surface and a rear surface of the optical object. The LEDs preferably form a ring with an, in particular average, maximum or minimum, diameter which is at least 1 cm, preferably at least 2 cm, and / or at most 15 cm, in particular at most 10 cm-such diameters are particularly advantageous in particular for the evaluation of spectacle lens lenses.According to a (second) aspect of the present invention, an arrangement which is set up or used for evaluating an optical object held at least temporarily on or by a holding device, in particular an optical lens, in particular a spectacle lens, in an embodiment for evaluating a reflection or reflection characteristic and / or a transmission or transmission characteristic of the optical object, has a monitor, the holding device for the optical object and a control device which can be connected (signal-wise) to the monitor, is connected in an embodiment, wherein the control device has a database or is connected to a database, wherein one or more virtual reference representations of the object to be evaluated are stored in the database (to which the control device is connected or which the control device (itself) has), wherein the one or more virtual reference representation(s) of the object to be evaluated is displayed on the monitor or the arrangement, in particular the monitor and the control device, are configured or used, wherein in one embodiment the evaluation of the optical object is carried out by comparing the optical object held on or by a holding device with the virtual reference representation(s) or the arrangement is configured or used for this purpose.In the control of reflex colors and colored glasses of spectacle lens lenses, real sample glasses are used as comparison object according to in-house practice. A spectacle lens to be checked is compared with such a real pattern under defined illumination. The sample glasses are expensive to produce, deviate slightly from one another again and again and also change over time. By using, in addition to or instead of real sample lenses, a preferably calibrated monitor or screen on which one or more desired and / or limit configurations of the spectacle lens to be controlled, in an embodiment of a reflection color or transmission color, is or are displayed, in an embodiment patterns which are advantageously easy to produce and / or multiply and / or are color-stable over a long period of time can be provided for (control). By storing the corresponding patterns or images or desired and / or boundary configurations in a, preferably central, database, it can advantageously be ensured that, preferably independently of location, the same representation of the sample glass is always used. In particular, the color stability can be ensured by periodic calibration of the screens.In one embodiment, the arrangement has a lighting device for, preferably ring-like, in particular ring-shaped, illumination of the optical object. In one embodiment, the lighting device is arranged in such a way that it illuminates the optical object in the viewing direction of the monitor or in the viewing direction of a viewer (also) viewing the monitor or from the front, or is configured to evaluate a reflection or reflection characteristic in particular. In another embodiment, the lighting device is arranged in such a way that it illuminates the optical object counter to a viewing direction on the monitor or counter to a viewing direction of a viewer looking on the monitor or from behind, or is configured to evaluate a transmission or transmission characteristic in particular.The two aforementioned aspects of an arrangement and a lighting device can be combined with one another in a particularly advantageous manner or the arrangement can have a lighting device according to the first aspect described above.In one embodiment, at least, in one development exactly, two virtual reference representations of the object to be evaluated are displayed, which in one embodiment represent a measure of a deviation to be tolerated, or the arrangement, in particular the monitor and the control device, is / are configured for this purpose.In one embodiment, the optical object to be evaluated is a spectacle lens, wherein preferably its visual appearance is to be evaluated or is / is the system set up or used for this purpose. In a development of this embodiment, the lighting device is arranged above the holding device and / or the spectacle lens held on or by the holding device and / or illuminates the spectacle lens, preferably from above, or the arrangement, in particular the lighting device and / or holding device, is / are configured for this purpose, preferably for evaluating a reflection characteristic. In a development, the lighting device is arranged below and / or viewed in the viewing direction of the monitor behind the holding device and / or the spectacle lens held on or by the holding device and illuminates the spectacle lens from below or behind or the arrangement, in particular the lighting device and / or holding device, is / are configured for this purpose, preferably for evaluating a transmission characteristic.Additionally or alternatively, in a further development of the embodiment, the at least or exactly two virtual reference representations are a first and second boundary pattern, which specify the space for tolerable color deviations for the spectacle lens to be evaluated.In one embodiment, the monitor is a calibrated monitor.In one embodiment, an object or the object to be evaluated is held on or by the holding device tilted at an angle to the main emission direction of the lighting device or the arrangement is configured for this purpose or is used for this purpose, wherein the angle is preferably different from zero and an integer multiple of 180° and is particularly preferably at least 1°, in particular at least 5°, in one embodiment at least 10°, and / or at most 85°, in particular at most 80°, in one embodiment at most 65°.By one or more of the aforementioned features, in particular in combination of two or more of the features, (in each case) a particularly advantageous evaluation of spectacle lens lenses can be made possible.According to a (third) aspect of the present invention, a system for evaluating an optical object, in an embodiment of an optical lens, in a development of a spectacle lens, has an arrangement for evaluating the optical object held at least temporarily on or by a holding device, which arrangement has the holding device for the optical object and a control device which has a database or is connected to a database, wherein one or more virtual reference representations of the object to be evaluated are stored in the database (to which the control device is connected or which (in turn) has the control device), wherein in an embodiment the evaluation of the optical object is carried out by comparing the optical object held on or by a holding device with the virtual reference representation(s) or the arrangement is set up or used for this purpose. In one embodiment, the arrangement is an arrangement according to the second aspect of the present invention described above.According to one embodiment of the present invention, the system has a lighting device which illuminates the optical object held on or by the holding device of the arrangement, preferably in the manner of a ring, in particular in the form of a ring, at least temporarily, preferably a lighting device according to the first aspect described above or the lighting device of an arrangement according to the second aspect described above.According to one embodiment of the present invention, the system has the optical object to be evaluated, in particular the optical lens, preferably spectacle lens.Additionally or alternatively, the system according to an embodiment of the present invention comprises one or more camera(s), preferably one or more calibrated camera(s).In a development of this embodiment, one or more images of the object to be evaluated, preferably held on or by the holding device and / or illuminated by means of the lighting device, preferably in the manner of a ring, are recorded with the aid of the camera(s) and the evaluation is carried out as a comparison between the recorded image and the virtual reference representation(s) or the system is set up for this purpose or is used for this purpose.In one embodiment of this refinement, the comparison between the recorded image of the object to be evaluated and the virtual reference representation(s) is carried out in a computer-implemented and automatic manner or is carried out in a computer-implemented and automatic manner by the control device, or the system, in particular the control device, is / are set up for this purpose. In one embodiment, the control device has at least one computer with a computing unit, and can in particular consist thereof.In a development of this embodiment, the automatic evaluation is carried out in a computer-implemented manner by a comparison at the pixel level of the recorded image and reference representation(s), in particular taking into account a predefined, tolerable color deviation, or, preferably optionally, on the basis of a stored acceptance model, wherein this acceptance model has preferably been generated (has been) by means of suitable training, test and validation data.In addition or as an alternative to the above-explained camera-, in particular computer-aided-design, the system according to the third aspect and / or the arrangement according to the second aspect additionally has, in one design, a loading and / or unloading device, by means of which an object to be evaluated is automatically loaded into the (evaluation) system or the (holding device of the) arrangement and / or, preferably after the evaluation has been completed, is automatically (again) unloaded or is set up or used for this purpose.By one or more of the aforementioned features, in particular in combination of two or more of the features, (in each case) a particularly advantageous evaluation of optical objects, in particular of optical lenses, very particularly of spectacle lens lenses, can be made possible.Instead of the aforementioned camera- or computer-supported embodiment, the evaluation can also be carried out at least partially manually with the aid of an arrangement and / or lighting device or a system described here, in that the optical object, which is optionally loaded manually or automatically into the holding device, is preferably held on or by the holding device, illuminated with the lighting device, preferably in the manner of a ring, and evaluation personnel compare the object illuminated in this manner with the virtual reference representation(s) displayed on the monitor and are evaluated on the basis thereof, or the system is submitted or used for this purpose.An evaluation in the sense of the present invention can be, in particular, a preferably manual or automated control (of the optical object).In one embodiment, a database mentioned here is a central or global database and / or a database spatially spaced apart from a control device mentioned here, for example stored on its own server or in a cloud, and (signal) connected to the control device mentioned here, preferably to a plurality of control devices described here, by cable or wirelessly, for example via the Internet or the like.Further advantages and features are evident from the dependent claims and the exemplary embodiments. This is partially schematic: FIG. 1 : shows a system with an arrangement for evaluating an optical object and a lighting device for illuminating the object according to one embodiment of the present invention; and FIG. 2 : shows a system with an arrangement for evaluating an optical object and a lighting device for illuminating the object according to a further embodiment of the present invention.FIG. 1 shows a system with an arrangement for evaluating an optical object according to an embodiment of the present invention.The system or arrangement thereof has a holding device 1 on which a spectacle lens 2 is or can be held.The system or arrangement thereof has a lighting device 3 for illuminating the lens 2 according to one embodiment of the present invention.The lighting device 3 shown partially in section in FIG. 1 has a printed circuit board 3.1, a plurality of annularly arranged sun-light-fast single-chip LEDs 3.2 having a color rendering index of at least 95, a reflector 3.3 and a diffuser 3.4. In a modification, the reflector and / or the diffuser can be omitted.The spectacle lens 2 held on or by the holding device 1 can be illuminated annularly by the lighting device 3.The system has a control device 4 with a database 7. In a modification, the control device can also be connected (signal) at least temporarily to the database, which is indicated in FIG. 1 by a database 7'. Virtual reference representations of spectacle lens are stored in the database 7 or 7'.In one variant, the system has a camera 5, with which an image of the spectacle lens 2 to be evaluated, which is held on or by the holding device 1, is recorded, so that the control device 4 (configured for this purpose) can perform a comparison between this recorded image and one of the virtual reference representations in a computer-implemented and automatic manner.In one variant, the system has a monitor 6, on which one or more of the virtual reference representations of the spectacle lens 2 to be evaluated, held on or by the holding device 1, preferably a first and second boundary pattern, which specify the space for tolerable color deviations for the spectacle lens to be evaluated, are (can) displayed, so that an evaluation staff (in FIG. 1 instead of the camera 5 can think of or indicated by a dashed eye) can evaluate these boundary patterns by optically comparing these boundary patterns with the real spectacle lens 2.The exemplary embodiment is particularly suitable for evaluating a reflection characteristic of an optical object, in particular of a spectacle lens.In order to evaluate a transmission characteristic of an optical object, in particular of a spectacle lens, in an advantageous modification the lighting device 3 or another lighting device can be arranged under or in the viewing direction of the monitor 6 or in the viewing direction of the observer or of the camera 5 behind the holding device 1 or the optical object or spectacle lens 2 held therein. In this way, for example, dyeings can be evaluated particularly advantageously. This can advantageously likewise take place with a virtual reference representation as a single image or target pattern or with two virtual reference representations as boundary patterns.This is illustrated by way of example in FIG. 2, wherein features corresponding to FIG. 1 are identified by the same reference numerals and reference is made to the above description in this respect.In the present disclosure, "an X has" generally does not imply a exhaustive enumeration, but is a short form of "has at least one X" and also includes "has two or more X" and "has Y other than X". Although exemplary embodiments have been explained in the preceding description, it should be noted that a multiplicity of modifications are possible. Thus, in particular in the exemplary embodiment, a plurality of aspects of the present invention have been explained in combination with one another and on the basis of the particularly preferred application with spectacle lens lenses, wherein only one aspect or a part of the aspects can also be realized in combination with one another and / or the invention can also be used with or for other optical object(s)(s). It should also be noted that the exemplary embodiments are merely examples that are not intended to limit the scope, applications, and configuration in any way. Rather, the foregoing description provides those skilled in the art with a guide to the implementation of at least one exemplary embodiment, wherein various changes, in particular with regard to the function and arrangement of the described constituent parts, can be made without departing from the scope of protection as evident from the claims and combinations of features equivalent thereto.List of reference characters1 Holding device 2 Spectacle lens 3 Lighting device 3.1 Printed circuit board 3.2 LED 3.3 Reflector 3.4 Diffuser 4 Control device 5 Camera 6 Monitor 7; 7' Database

Claims

Lighting device (3) for ring-like illumination of an optical object, in particular an optical lens, in particular a spectacle lens (2), wherein the lighting device comprises a printed circuit board (3.1) on which a plurality of LEDs (3.2) is arranged, wherein the lighting device, in particular the LEDs, is or are configured to emit an, in particular continuous, light spectrum at a color rendering index of greater than or equal to 95, in particular greater than or equal to 98.The lighting device according to claim 1, wherein the lighting device and / or the circuit board is configured ring-like and / or the circuit board is arranged within the lighting device and / or ring-like and / or the LEDs are arranged within the lighting device and / or ring-like.Lighting device according to one of the preceding claims, wherein the light intensity of at least two, in particular all, LEDs is the same and / or the LEDs are arranged on the printed circuit board in such a way that a uniform light intensity can be generated.Lighting device according to one of the preceding claims, wherein at least one reflector (3.3) for concentrating light emitted by the LEDs in an emission direction is arranged on the lighting device and / or a diffuser (3.4) is arranged in front of at least one of the LEDs.Lighting device according to one of the preceding claims, wherein at least one of the LEDs is a sun-light-fast LED and / or a single-chip LED and / or comprises only one diode.Lighting device according to one of the preceding claims, wherein the light intensity and / or the light colour can be regulated.Arrangement for evaluating an optical object held at least temporarily on a holding device (1), in particular an optical lens, in particular a spectacle lens (2), wherein the arrangement has a monitor (6), the holding device and a control device (4) which is connectable, in particular connected, to the monitor, the control device has one or connected to a database (7; 7'), wherein at least one virtual reference representation of the object to be evaluated is stored in the database, wherein the arrangement is configured to display the virtual reference representation of the object to be evaluated on the monitor.Arrangement according to claim 7, wherein the arrangement has a lighting device (3) for, in particular ring-like, illumination of the optical object, in particular a lighting device according to one of claims 1 - 6.Arrangement according to claim 7 or 8, which is configured to display at least, in particular exactly, two virtual reference representations of the object to be evaluated.Arrangement according to one of Claims 7 to 9, wherein the optical object to be evaluated is a spectacle lens (2), wherein the lighting device is configured to illuminate the spectacle lens, wherein the two virtual reference representations are a first and second boundary pattern which prescribe the space for tolerable colour deviations for the spectacle lens to be evaluated.Arrangement according to any of claims 7 to 10, wherein the monitor (6) is a calibrated monitor.Arrangement according to one of Claims 7 to 11, wherein the holding device is configured to hold the object to be evaluated held on the holding device in a tilted manner at an angle to the main emission direction of the lighting device.System for evaluating an optical object, in particular an optical lens, in particular a spectacle lens (2), the system having an arrangement, in particular according to one of Claims 7 to 12, for evaluating the optical object held at least temporarily on a holding device (1), the arrangement having the holding device and a control device (4), the control device having one or connected to a database (7; 7'), at least one virtual reference representation of the object to be evaluated being stored in the database, the system having a lighting device (3) for, in particular ring-like, lighting of the optical object, in particular a lighting device according to one of Claims 1 - 6, the system having the optical object and / or at least one camera (5).The system according to claim 13, wherein the system comprises the at least one camera (5) and is configured to capture at least one image of the object to be evaluated using the camera and to perform the evaluation as a comparison between the captured image and the virtual reference representation.The system according to claim 14, wherein the control device is configured to perform the comparison between the recorded image of the object to be evaluated and the virtual reference representation in a computer-implemented and automatic manner.The system according to claim 15, wherein the system is configured such that the automatic evaluation is carried out in a computer-implemented manner by a comparison at the image point level of recorded image and reference representation, in particular taking into account a predetermined, tolerable color deviation, or on the basis of a stored acceptance model, wherein this acceptance model is preferably generated by means of suitable training, test and validation data.The system according to any one of claims 13 to 16, wherein the system additionally comprises a loading and / or unloading device for automatically loading an object to be evaluated into the evaluation system and / or automatically unloading, in particular after evaluation has been carried out.

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