Device and method for demonstrating the visual impression for a wearer of glasses with polarized lenses.

Abstract

Device (100) for demonstrating the visual impression for a wearer (170) of spectacles (400) with polarizing lenses (410a, 410b) comprising: a) a memory (152) for providing a first image (114, 210, 310) with a motif and an associated first polarization direction; b) a memory (152) for providing a second image (116, 220, 320) with the same motif and an associated second polarization direction different from the first polarization direction; c) a display device (110) for displaying the first image (114, 210, 310) with light polarized in the first polarization direction and the second image (116, 220, 320) with light polarized in the second polarization direction in a superimposed, namely composite, representation (118, 230, 330), such that the motif of the first image (114, 210, 310) and the motif of the second image (116, 220, 320) coincide in form identically, where (cl) the first image (114, 210,310) is a photograph taken by a camera with a polarizing filter in front of it, having a first polarization axis, and the second image (116, 220, 320) is a photograph taken by a camera with a polarizing filter in front of it, having a second polarization axis different from the first polarization axis, or (c2) the first image (114, 210, 310) is a photograph taken by a camera with a polarizing filter in front of it, having a first polarization axis, and the second image (116, 220, 320) is a computer-generated modification of the first image (114, 210, 310), such that the second image (116, 220, 320) corresponds to a photograph taken by a camera with a polarizing filter in front of it, having a second polarization axis different from the first polarization axis.

Description

The invention relates to a device for demonstrating the visual impression for a wearer of glasses with polarizing lenses according to the preamble of claim 1 and a method for demonstrating the visual impression for a wearer of glasses with polarizing lenses according to the preamble of claim 7. Within the scope of the present invention, the term "spectacle lenses" refers to all types of optical corrective lenses, including lenses without optical correction, that are components of eyeglasses and through which the wearer looks when using the glasses as intended. Spectacle lenses are available in plastic and mineral glass. Polarization describes the direction of oscillation of an electromagnetic wave. Natural light is usually perceived as unpolarized, a superposition of different waves of electromagnetic radiation with varying planes and phases of oscillation. After reflection at an interface, the reflected light partially exhibits a polarization direction. A polarizing lens is defined in DIN EN ISO 13666 (1998) as a lens that exhibits varying light absorption depending on the polarization of the incident light. The orientation of the maximum transmission of the electric field vector of electromagnetic radiation through a polarizing lens is called the lens's polarization axis. The position of the polarization axis within the frame is specified in degrees (°), where 0° represents a horizontal orientation and 90° a vertical orientation. The transmission plane of a polarizing lens is defined as a plane intersecting the lens that contains the direction of propagation of the transmitted radiation and is parallel to the orientation of the maximum transmission of the electric field vector of the transmitted radiation.The polarization plane of a polarizing lens is normal to the transmission plane and is often indicated by markings on the lens. A setup for determining the polarization plane is shown, for example, in DIN EN ISO 8980-3:2004 or DIN EN 1836:2005+A1:2007 (D). There are spectacle lenses that permanently possess a preferably predetermined polarizing property, and those whose polarizing property can change. The latter category includes so-called photochromic lenses. Such lenses contain a photochromic material, for example, in the form of a coating or as an additive to the lens body. A photochromic material is one that reversibly changes its light transmission properties depending on the irradiance and wavelengths of the incident radiation. This change in light transmission properties can simply alter absorption or also produce a polarizing effect. Polarized glasses have two polarized lenses permanently integrated into a frame. This means that there is a mechanically secure connection between the frame and the lenses. Therefore, full-rim frames, rimless frames, and frames with a carrying rim can all be used to fix the lenses in place. Polarized lenses are primarily used in sunglasses. In such polarized lenses, which are designed to reduce glare from the sun, the transmission plane is usually oriented vertically and the polarization plane horizontally for the following reasons. As is well known, the Brewster angle is the angle to the normal of an interface at which incident light is reflected in such a way that only the components polarized parallel to the interface (i.e., perpendicular to the plane of incidence) are reflected (s-polarized). At a horizontal interface (such as a water surface), light reflected at this angle is therefore horizontally polarized. At other angles, deviating from the Brewster angle, the reflected light also has components polarized in the plane of incidence (p-polarized). In polarizing glasses, such as sunglasses with polarized lenses, the polarization axis is oriented vertically (90°) and the polarization plane is oriented horizontally (0°). Lenses with a vertical polarization axis or a horizontal polarization plane are therefore transparent to vertically polarized light.This greatly reduces reflections on horizontal surfaces (such as water surfaces) for the wearer of glasses. Polarizing glasses consist of two polarizing lenses which are permanently installed in a frame, whereby the two defined polarization planes of the two polarizing lenses may not differ from each other by more than 6° according to DIN EN 1836:2005+A1:2007. DIN EN 1836:2005+A1:2007 (D) further stipulates that the polarization plane of sunglasses may not deviate from the horizontal by more than + / -5°. This means that polarized lenses must be mounted in the frame in such a way that their polarization axis does not deviate from the vertical by more than + / -5°. Such sunglasses are described, for example, in US 747,235. The degree of polarization or polarization efficiency quantifies the quality of the polarization of a spectacle lens. The terms degree of polarization and polarization efficiency are often considered equivalent in the literature. Both are defined in DIN EN 1836 and DIN EN ISO 13666. The degree of polarization P is defined as P = (Imax - Imin) / (Imax + Imin), where Imax and Imin represent extreme values ​​of the light transmittance I. To determine the degree of polarization, one side of the polarizing spectacle lens is illuminated with 100% linearly polarized light at a defined polarization plane and intensity. On the opposite side of the polarizing spectacle lens, the intensity can be measured as a function of the lens's angle relative to the defined polarization plane.For a specific angle, the maximum value Imax of the light transmittance I will reach its maximum. This angle is designated by the polarization axis. At this angle, any plane parallel to the defined polarization plane of the incident light is a transmission plane of the polarizing lens. At a different angle, the minimum value Imin of the light transmittance I occurs. Imin typically occurs at an angle that deviates by 90° from the polarization axis. At this angle, any plane parallel to the defined polarization plane of the incident light is a polarization plane of the polarizing lens. The polarization ratio R = Imax / Imin can also be used to assess the quality of polarizing lenses. Polarized lenses must, according to DIN EN 1836:2005+A1:2007 (D) and DIN EN ISO 8980-3:2004, have a ratio between maximum and minimum light transmission greater than 8:1 or greater than 4:1, respectively. Polarized lenses thus achieve a polarization degree of 78% or 60%. High-quality lenses have a polarization degree of more than 99%. However, such metrics are difficult for eyeglass wearers to grasp. Without their own comparative data or experience, or without understanding the meaning of these metrics, it is generally almost impossible for eyeglass wearers to distinguish between high-quality and lower-quality lenses. To demonstrate the polarizing properties of, for example, sunglasses with polarized lenses, stickers or small emblems are often used today that reflect light with a defined polarization direction. The wearer can then view the stickers or emblems through the polarized lenses. When the stickers or emblems are rotated relative to the polarized lenses in a frame, a change in intensity is noticeable, which does not occur with non-polarized lenses. However, this provides no information about the quality of the polarized lenses in a frame, but only a simple distinction between polarized and non-polarized lenses in a given frame. Other demonstrators rely on superimposing a simulated reflection onto a test image using a semi-transparent film. When viewing the demonstrator through polarized glasses, the simulated reflection is significantly reduced in intensity, and the original image appears with increased contrast. However, no distinction in image quality is possible with these methods. Furthermore, this type of demonstrator only displays a single test image, which may not reflect the actual viewing conditions of the glasses wearer. Furthermore, vision testing devices are known from the prior art that display optotypes with polarized light of different polarization directions using optotype charts or displays. When used as intended, a test subject wears spectacles with two differently polarized lenses, the polarization axes of which are perpendicular to each other. This ensures that the test subject can perceive a displayed optotype, or parts thereof, with only one eye and other parts with only the other eye. Such a vision testing device is known, for example, from EP 0 512 443 A1. The device essentially consists of two polarizing films and two liquid crystal displays arranged alternately. This arrangement is capable of manipulating the light from a light source so that optotypes, or parts thereof, can be selectively viewed by only one eye or by both eyes. The light source first illuminates the first color-neutral, transparent polarizing film. The light passing through the first polarizing film penetrates the first, possibly colored, display and illuminates the second color-neutral polarizing film. The light passing through the second polarizing film penetrates the second display, after which the light exits the device. With such a vision testing device, figures and drawings can be displayed by activating the individual liquid crystal cells.If the displayed optotype is to be changed, a corresponding command is sent via a keyboard to a switching device, which controls the two driver circuits of the two displays in the desired manner. DE 42 357 53 A1 and the equally prior EP 0 595 023 A1 describe a vision testing device essentially consisting of at least one vector film with many individual polarization elements and at least one screen. The polarization elements are arranged in strips, with the polarization elements of each strip having the same polarization direction. The polarization elements in the adjacent strips have polarization axes perpendicular to each other. The publication explicitly notes that the liquid crystal displays typically consist of several hundred times several hundred LCD elements, so that no stripes are visible when the viewer is at a sufficiently large distance from the display. DE 199 47 775 A1 describes a test device similar to that described in EP 0 595 023 A1. Horizontal pairs of lines arranged one above the other are presented to the test subject's eyes, with the test device providing only one line for each eye. German patent DE 100 07 020 A1 relates to a near vision testing device for displaying optotype charts. Each optotype chart displays one or more optotypes for testing the user's visual acuity. An optotype chart presents a stereotype test that assesses the subject's spatial perception. Due to the horizontally offset, differently polarized triangles, these appear spatially displaced from a black point located in the center of the optotype chart, which is perceptible to both eyes. These vision testing devices are designed for glasses with polarized lenses whose polarization axes include a non-zero angle, usually 90°. While a visual acuity symbol currently displayed on the device's screen may produce a different visual impression for the wearer of glasses with polarized lenses and parallel polarization axes, depending on the quality of the polarization properties, the wearer generally cannot judge whether they are wearing high-quality or low-quality glasses based solely on the visual impression. US Patent 2006 / 0203338 A1 describes a stacked display for presenting three-dimensional images and videos. It generates two superimposed, polarized image patterns that differ in their polarization planes. When viewed simultaneously through glasses with polarized lenses whose polarization axes differ by 90°, the two image patterns create a three-dimensional visual impression. This three-dimensional visual impression can only be created if the two image patterns depict an object from different perspectives. Therefore, the two image patterns are not congruent. Consequently, the subjects of the two image patterns are not identical.When viewing the display with glasses featuring polarized lenses with parallel polarization axes, one either perceives only one of the two image patterns with one eye only, specifically when the polarization direction of the light from that image pattern coincides with the orientation of the lenses' polarization axis, or one perceives both image patterns simultaneously with both eyes, resulting in a blurred visual impression because the two images are neither identical nor superimposed. It is therefore impossible to make a statement about the quality of the polarized glasses. The object of the invention is to provide a device and a method for demonstrating the visual impression for a wearer of glasses with polarizing lenses, with which the quality and functionality of the polarizing glasses can be checked for both the buyer and the seller. This problem is solved by a device having the features of claim 1 and by a method having the features of claim 7. Advantageous embodiments and further developments of the invention are the subject of the dependent claims. The device according to the invention for demonstrating the visual impression for a wearer of glasses with polarizing lenses comprises a memory for providing a first image with a motif and an associated first polarization direction, a memory for providing a second image with a motif and an associated second polarization direction different from the first polarization direction, and a display device for displaying the first image with light polarized in the first polarization direction and the second image with light polarized in the second polarization direction in a superimposed representation. According to the invention, the two motifs of the first and second images are the same motif.Unlike the device described in US 2006 / 0203338 A1, the first and second images are displayed in such a way that the subject of the first image and the subject of the second image are identical in form. The two subjects of the first and second images are therefore identical in size and shape and are not offset in any way perceptible to the viewer, either laterally or in depth. The term "overlay" also means that the images are perceived simultaneously by the viewer, or in other words, that the viewer does not have the impression that they are being displayed sequentially. This means that each of the polarized image patterns is displayed at least ten times per second, and this display of individual images can certainly alternate, as long as the human eye is unable to perceive this. A viewer perceives two identical images with the naked eye as a single image. If the viewer wears polarizing glasses with two lenses of identical polarization axis as intended, they perceive the images only to the extent that they exhibit polarized components that coincide with the polarization axis of the lenses. Thus, by appropriately selecting the image and the polarization directions of the two images, it is possible to create a visual impression for the viewer of the display device that corresponds to what they would have if they were not seeing the image on the display device, but rather in its original form, for example, as an actual object or as a landscape, with and possibly without the use of polarizing glasses. It is hereby expressly clarified that the term "motif" is to be understood in the sense of image motif, namely as the essential content-related component of an image such as a photograph or a graphic. The emphasis is on a centrally depicted object (person, building, part of a landscape or situation). The effect of polarized sunglasses can be demonstrated particularly effectively to a viewer when presented with a scene corresponding to their natural environment. Such a scene could be, for example, an island rising from the sea under a clear sky and bright sunshine. A viewer will perceive strong reflections of sunlight on the water's surface with the naked eye. If the viewer wears polarized sunglasses, these reflections become invisible, and in sufficiently clear water, they can even see the bottom. The aim of the invention is, in particular, to artificially recreate this natural situation for the viewer on the display device. In principle, it would be possible to artificially generate the aforementioned motif and the two images with their corresponding different polarization directions, for example, in the form of a computer graphic. According to the invention, a visual impression that generally more closely resembles reality can be generated if the first image is a photograph taken with a camera equipped with a polarizing filter and a first polarization axis, and if the second image is also a photograph taken with a camera equipped with a polarizing filter and a second polarization axis that differs from the first. Of course, it is also possible if only one of the images is a corresponding photographic camera image and the other image is generated, for example, from a corresponding modification of the first image using a computer.To maintain the inventive identity of the motifs in both images, it is naturally advantageous in the first case if both photographs are taken with the same camera and if its settings remain unchanged. The shooting direction and distance to the object should also preferably be identical for both shots. It is also possible to present moving subjects, for example, in the form of a video with a continuous sequence of images of the type described above. Such a moving subject can be created, for example, by a moving camera. In particular, this allows a sequence of different viewing situations to be demonstrated sequentially. To achieve the required identity of the motifs in both image sequences according to the invention, it is advantageous if the two corresponding video recordings are made simultaneously by two video cameras, each equipped with polarizing filters and each with differently oriented polarization axes, and if their settings are identical. The recording direction and distance to the object are also preferably the same for both video recordings, which is achieved by mechanically connecting the two video cameras and rigidly aligning them with the same motif. An alternative to using two (video) cameras or one (video) camera with (continuously sequential) alternating (video) image recording using a polarizing filter with a first polarization axis orientation and a polarizing filter with a second polarization axis orientation that differs from the first, a single (video) camera can also be used with a polarizing filter in front of it that has locally differently oriented polarization axes. In other words, the polarizing filter has a polarization axis oriented in one direction at various points and a polarization axis oriented in a different direction at other points. These points with different polarization axis orientations can, for example, correspond to the light and dark squares of a chessboard (i.e.,bright field = filter effect with first polarization axis direction and dark field = filter effect with second polarization axis direction) or arranged alternately in stripes. To demonstrate the effect of polarizing glasses to a viewer, it would theoretically be possible to use the exact same image as the first and second images, since the brightness is reduced with polarizing glasses compared to viewing with the naked eye. However, the difference in visual perception with and without polarizing glasses can be shown particularly well if the first and second images differ in at least one optical property, especially in at least one of the optical properties from the group of contrast, brightness, saturation, and hue.Knowledge of the relevance of these properties is particularly helpful if at least one of the two images is not a direct photographic image, but was generated from a photographic image using technical aids such as special optical and / or computational filters, or if at least one of the two images was generated purely by means of computer-implemented aids. The difference in the optical properties of the images is particularly striking to the viewer when the images contain at least ten different brightness values ​​and / or ten different color values. The different optical properties of the displayed images manifest themselves specifically in the representation of reduced reflections, reduced refractions, darker blues, and the visibility of a rainbow in one of the two images. These different optical properties do not include the image composition or different views or perspectives of a three-dimensional object. There are various ways to display the two images on the display device. This depends on the type of display device used and / or the way the images are prepared for display. For example, some display devices have pixels arranged like the squares of a chessboard. Others have pixels arranged in strips. Some display devices have a fixed polarization axis for individual pixels, while others allow the polarization axis of all pixels to be adjusted as desired. Display devices with a fixed polarization axis for individual pixels can, for example, be used in...The display can be structured in a checkerboard pattern with light and dark squares, whereby the pixels corresponding to the light squares of the checkerboard have one polarization axis and the pixels corresponding to the dark squares have another polarization axis. With display devices that have a pixel-by-pixel adjustable polarization axis, it is then possible to operate them, using suitable software, in the manner of display devices with a fixed polarization axis, by always assigning the same polarization axis to predetermined pixels. Image points with a defined polarization axis are those image points which all produce at least 80%, preferably at least 90%, and more preferably at least 95% linearly polarized radiation, wherein the electric vector of the radiation of the image points is contained in a plane parallel to the polarization plane. Based on this understanding, the display device can be configured so that the first image displayed consists of pixels arranged in the manner of the squares of a single color in a chessboard pattern, and the second image displayed consists of pixels arranged in the manner of the squares of the other color in the chessboard pattern. This type of display is particularly suitable when the human eye does not perceive the individual pixels separately next to each other, as is the case with a computer or television screen. The display device can also be configured such that the first image consists of pixels arranged in the manner of all fields of a chessboard pattern, and that the second image consists of the same pixels, and that the respective displayed pixels contain the information of the corresponding pixel of the first image and the information of the corresponding pixel of the second image, wherein the polarization direction corresponds to the vector addition of the polarization direction vectors taking the intensity into account of the corresponding pixels of the first image and the second image. In principle, for the demonstration according to the invention, it is possible to display linearly polarized images superimposed on one another in any way, provided their polarization directions differ. The polarizing effect of polarizing lenses can be demonstrated particularly easily when the first polarization direction is perpendicular to the second polarization direction. Thus, by appropriately positioning the subject and knowing the orientation of the polarization axis of their polarizing glasses, it is possible to determine which of the two images they perceive and which they do not. It is fundamentally possible to design the display device in such a way that a viewer receives a three-dimensional visual impression. The display device must then have areas visible exclusively to the viewer's left eye and areas visible exclusively to the viewer's right eye. Each of these areas must be designed to display a first image with light polarized in the first polarization direction and a second image with light polarized in the second polarization direction in a superimposed representation, such that the motif of the first image and the motif of the second image coincide in form. The three-dimensional visual impression is created by the fact that the representation of the motif in the first area and the motif of the second area do not coincide in form. For this purpose, an optical assembly is arranged on the side of the display device that points towards the eyes of the subject in the optical beam path. This assembly separates the light supplied to the optical beam path by a first group of selected areas of the display device from the light supplied to the beam path by a second group of selected areas of the display device, in order to supply the light from the first group of selected areas of the display device to the left eye of the subject and to direct the light from the second group of selected areas of the display device to the right eye of the subject. The optical assembly for separating the light from the first and second groups of selected areas of the display device is to be designed with an aperture system acting as a parallax barrier. For this purpose, the aperture system can, for example, be designed as a mask with alternating transparent and opaque areas. The alternating transparent and opaque areas of the mask can have a checkerboard or striped shape. Advantageously, the checkerboard shape of the pixels and the checkerboard or striped shape of the mask are arranged or aligned parallel to each other. In the general section of the introductory description, it was pointed out that photochromic lenses also belong to the category of polarized lenses. To demonstrate the functionality of such lenses, the invention optionally provides a light source for activating the photochromic lenses. The inventive method for demonstrating the visual impression for a wearer of glasses with polarizing lenses comprises the following steps: a) providing a first image with a motif and an associated first polarization direction; b) providing a second image with the same motif and an associated second polarization direction different from the first polarization direction; c) displaying the first image with light polarized in the first polarization direction and the second image with light polarized in the second polarization direction in superimposed Representation such that the motif of the first image and the motif of the second image coincide in a formally identical manner. As already described above regarding the device according to the invention, the first image can be a photograph taken with a camera equipped with a polarizing filter and a first polarization axis. Alternatively or additionally, a second image can be taken with a camera equipped with a polarizing filter and a second polarization axis different from the first. These images can be stored, for example, together with information about the direction of the polarization axis of the filter used, as the respective associated polarization direction. However, the latter is not mandatory. The provided respective associated polarization direction can also be any other arbitrary polarization direction.To generate the most realistic display possible, the direction of the polarization axis and the polarization direction will coincide (the same orientation of the captured image and the displayed image is of course assumed). In the method according to the invention, it is advantageous if the first image and the second image differ in at least one optical property, in particular in at least one of the optical properties from the group consisting of contrast, brightness, saturation, and hue. The reasons for this have already been explained above in the description of the device according to the invention. On the one hand, it is possible that the first displayed image consists of the first pixels arranged in the manner of the squares of one of the colors of a chessboard pattern, and that the second displayed image consists of the second pixels arranged in the manner of the squares of the other color of the chessboard pattern. On the other hand, it is possible that the first image consists of pixels arranged in the manner of the squares of a chessboard pattern, and that the second image consists of the same pixels, and that the respective displayed pixels contain the information of the corresponding pixel of the first image and the information of the corresponding pixel of the second image, where the polarization direction corresponds to the vector addition of the intensity-dependent polarization direction vectors of the corresponding pixels of the first image and the second image. Since conventional sunglasses have polarized lenses whose polarization axis deviates from the vertical by no more than + / - 5°, it is advantageous for the first polarization direction to be horizontal and the second vertical. The polarization direction of one of the two images therefore corresponds to the direction of the polarization axis of the lenses, and the polarization direction of the other image is perpendicular to this polarization axis. Consequently, the wearer of polarized sunglasses perceives only one of the images, while without polarized sunglasses, they see both images superimposed. When viewing the image-generating device without polarized lenses, the superposition of all polarized images is visible, as the naked eye cannot distinguish light with different polarization directions. The method according to the invention may include the following further method step: d) Positioning a test subject to view the displayed images in superimposed representation optionally with the naked eye and / or through glasses with non-polarizing lenses and / or through glasses with polarizing lenses. This will demonstrate to the test subject the different visual impressions with the naked eye, through glasses with non-polarizing lenses and through glasses with polarizing lenses, and the test subject will recognize the advantages of polarizing lenses. In this context, the function and effect of photochromic lenses can also be explained to the test subject upon request. Therefore, it is planned to switch on a light source to activate the photochromic lenses if necessary. The light source can be, for example, a UV lamp. Using such a UV lamp, which is suitable for activating photochromic lenses, a pair of photochromic polarized glasses can be irradiated with ultraviolet light for 60 seconds. The irradiated photochromic polarized glasses will then exhibit polarizing properties. A test subject can then verify the quality of these glasses. In some cases, it may be useful for the lamp suitable for activation to remain lit at least from the moment a subject is positioned, so that the phototropic polarizing lenses are constantly activated. The invention is described in more detail below with reference to the drawings. Identical or functionally equivalent components are designated with identical reference numerals in the figures. Figure 1 shows an embodiment of a device according to the invention with a display for demonstrating the visual impression for a wearer of glasses with polarizing lenses: a) Structure of the device; b) Image superimposition with the device. Figure 2 shows a first variant for the arrangement of polarizing pixels in the display of the device according to Figure 1. Figure 3 shows a second variant for the arrangement of polarizing pixels in the display of the device according to Figure 1.4. A basic structure of polarizing lenses in a spectacle frame: a) spectacles with frame and lens horizontal; b) polarization effect of a polarizing lens in perspective view; c) polarizing lenses with different polarization axes; d) polarizing spectacles with vertically polarizing lenses. Fig. 5. A schematic flowchart of a method according to the invention for demonstrating the visual impression for a wearer of spectacles with polarizing lenses. Fig. 6. A schematic representation of the assessment of the quality of polarizing lenses with a device according to Fig. 1. Fig. 7. A selection of motifs for images to carry out the method according to Fig.5 a) Road traffic scene: Top image: Shot taken with a polarizing filter with a horizontal polarization axis. Bottom image: Shot taken with a polarizing filter with a vertical polarization axis. b) Beach scene: Top image: Shot taken with a polarizing filter with a horizontal polarization axis. Bottom image: Shot taken with a polarizing filter with a vertical polarization axis. Fig.8. A defect detection system based on a simple image pattern: a) two polarizing images and a superimposed image; b) visible image when viewing the superimposed image according to a) with a polarizing lens with a vertical polarization axis; c) visible image when viewing the superimposed image according to a) with a polarizing lens with a 45° inclined polarization axis; d) visible image when viewing the superimposed image according to a) with a polarizing lens with a horizontal polarization axis; e) visible image when viewing the superimposed image according to a) with a polarizing lens with a non-uniform polarization axis. Fig. 9 shows a variant for the arrangement of polarizing pixels and a parallax mask in the display of the device according to Fig. 1 for generating a three-dimensional visual impression. Fig. 10 shows the arrangement of polarizing pixels in the display of the device of the embodiment according to Fig.Fig. 11 shows the arrangement of transparent and non-transparent areas in the parallax mask of the embodiment according to Fig. 9. Fig. 1 a) shows the schematic setup of a device 100 according to the invention for testing the two polarizing lenses 410a, 410b of a pair of glasses 400. The device 100 comprises an image generation unit 102. The image generation unit 102 includes a display unit in the form of a display 110 with a plurality of pixels 112a, 112b, 112c, which are controlled via a driver group 120 and a computer unit 150 with memory 152. Furthermore, in the embodiment according to Fig. 1, a light source 140 is provided for activating photochromic lenses 410a, 410b. The schematic drawing in Fig. 1 further shows a subject 170 who views the display 110 of the image generation device 102 from a distance D. The distance D is in the range 30 cm < D < 7 m. The subject 170 wears glasses 400 with two polarizing lenses 410a, 410b on his nose 160. Polarizing lenses 410a, 410b are therefore located in a frame 402 in front of the eyes 161a and 161b of the subject 170. The Display 110, for example, is designed as a light-emitting diode matrix display (hereinafter referred to as LED matrix display) or as a liquid crystal matrix display (hereinafter referred to as LC matrix display). Each pixel 112a, 112b, 112c of the display 110 has a uniquely defined polarization plane. There are various ways to define the polarization plane of each pixel 112a, 112b, 112c. The polarization plane of pixels 112a, 112b, 112c can be defined in hardware, for example, by means of appropriate polarizing filters. Advantageously, groups of pixels 112a, 112c have the same defined polarization plane. In this case, the intensities of each individual pixel 112a, 112b, 112c are set via the driver group 120 and the computer unit 150. The polarization plane of pixels 111 can alternatively be defined by the driver group 120 and the processing unit 150. This is possible, for example, with so-called dual-stack LCDs. The intensities and polarization plane of each individual pixel 112a, 112b, 112c are then set via the driver group 120 and the processing unit 150. Some displays only offer a choice between discrete, fixed polarization planes. Other displays allow the polarization plane of pixels 112a, 112b, 112c to be changed within an angular range between 0° and 90°. Memory 152 stores two images, 114 and 116, depicting the same subject, 122. A polarization direction is stored for each image, 114 and 116, with the polarization direction of one image, 114, differing from that of the other, 116. Storing a polarization direction means storing retrievable information for displaying images 114 and 116 with linearly polarized light of a predefined polarization direction. This includes the case where the respective images 114 and 116 are output via the pixels of a display equipped with a filter whose polarization axis corresponds to the assigned polarization direction. According to the invention, the display 110 simultaneously overlays the two images 114, 116 as a display image 118 in such a way that the motif 122a of the first image 114 and the motif 122b of the second image 116 coincide in form identically to form the motif 122, as is shown schematically in simplified form in Fig. 1 b). A possible arrangement of the pixels for displaying the first image 210 and the pixels for displaying the second image 220 is shown in Fig. 2. The first image 210 consists of pixels 210a, 210b, 210c, 210d, 210e with a first defined polarization plane. This defined polarization plane can, for example, be at 90° to the horizontal, i.e., have a vertical orientation. It is also possible for the defined polarization plane to be at, for example, 45° to the horizontal. The second image 220 consists of pixels 220a, 220b, 220c, 220d, 220e with a second defined polarization plane. The first and second defined polarization planes can form an angle of 90°. It is possible for the second defined polarization plane to be at, for example, 0° to the horizontal, i.e., have a horizontal orientation. It is also possible that the second polarization plane is at an angle of, for example, 135° to the horizontal. Fig. 2 also shows an example of a superimposed polarized image 230, which consists of both the image 210 with pixels 210a, 210b, 210c, 210d, 210e with a first defined polarization plane and the image 220 with pixels 220a, 220b, 220c, 220d, 220e with a second defined polarization plane. Figure 3 shows a second variant for the arrangement of polarizing pixels. The first image 310 consists of pixels 310a, 310b, 310c, 310d, 310e, 310f, 310g, 310h, 310i, 310k with a first defined polarization direction and intensity. In this embodiment, this defined polarization direction is vertical. The second image 320 consists of pixels 320a, 320b, 320c, 320d, 320e, 320f, 320g, 320h, 320i, 320k with a second defined polarization direction and intensity. The first and second defined polarization directions form an angle of 90°. In both cases, other orientations are possible. The superposition of the two images 310 and 320 to form the displayed image 330 is achieved point by point by vector addition of the electric field vector, which takes into account the intensity (magnitude) and polarization direction of the light emanating from the respective image points 330a, 330b, 330c, 330d, 330e, 330f, 330g, 330h, 330i, 330k. Fig. 4 shows the construction of polarizing spectacle lenses 400. Polarizing spectacle lenses 410, 410a, 410b are fitted into a frame 400 (Fig. 4a) with a frame horizontal 401 (Fig. 4b), Fig. 4c). When unpolarized light 416 strikes a polarizing spectacle lens 410, as shown in Fig. 4b), only a portion 417 is transmitted, namely (apart from reflection and absorption losses) the portion of the electromagnetic radiation of the incident light 416 whose polarization direction 416a coincides with the polarization axis 411 of the spectacle lens 414. The polarization direction of the transmitted light 417 is indicated in the drawing by the reference numeral 417a. The part of the electromagnetic radiation of the incident light 416, whose polarization direction 416b does not coincide with the polarization axis 411 of the spectacle lens 414, is either reflected or absorbed. Furthermore, the transmission plane 414 and the polarization plane 413 are shown in Fig. 4b). The transmission plane 414 of the polarizing spectacle lens 410 is a plane that intersects the spectacle lens 410 and contains the propagation direction 418 of the transmitted radiation 417, and is parallel to the orientation 416a of the maximum transmission of the electric vector of the transmitted radiation. The transmission plane 414 can therefore include the polarization axis 411. The plane normal to the transmission plane 414 is called the polarization plane 413 and is indicated by markings 412 on the spectacle lens 410. Polarizing spectacle lenses 410, 410a, 410b are characterized by having a defined polarization axis 411, 411a, 411b, as is also illustrated graphically in Fig. 4c). By installing polarizing spectacle lenses 410a, 410b in a frame 400, the position of the polarization axes 411a, 411b and the polarization planes optionally marked by the markings 412a, 412b relative to the frame horizontal 401 is defined. In Fig. 4d), spectacle lenses in a frame 420 with defined polarization axes 411a, 411b of 90° each (vertical orientation) are shown. The polarization planes, optionally marked 412a and 412b, are horizontally aligned in the frame's coordinate system, i.e., parallel to the frame's horizontal axis 401. This alignment is desirable, for example, in sunglasses to minimize reflections from horizontal surfaces. Figure 5 schematically illustrates a method for demonstrating the visual impression to a wearer of glasses with polarizing lenses: The starting point is the search for a suitable image to illustrate the effect of polarizing glasses to the wearer (not shown in Figure 5, 502). Figure 7 shows a selection of images that the inventor considers particularly suitable because they simulate a visual impression under natural environmental conditions. On the left is an image of an object or landscape as perceived by the naked eye by the direct observer, and on the right is an image of the object or landscape as seen by the observer when wearing polarizing glasses as intended. In a first step (504), a photograph of a suitable subject is taken with a camera equipped with a polarizing filter, resulting in a first polarization axis. In the example shown, the polarization axis runs vertically. Saving the camera image is shown in step 506. In a further step (508), the same camera is used to take another photograph of the subject, this time with a polarizing filter but with a second polarization axis that differs from the first. In the example shown, the second polarization axis runs horizontally. Saving the second camera image is shown in step 508. In a subsequent step 512, the first image is provided together with its corresponding first polarization direction, and the second image is provided together with its corresponding second polarization direction. In step 514, the first image, with light polarized in the first polarization direction, and the second image, with light polarized in the second polarization direction, are displayed superimposed, so that the subject of the first image and the subject of the second image are identical in form. In the following step 516, a test subject 170, a potential wearer of polarized glasses, is shown the superimposed image. The wearer 170 is positioned so that he can view the superimposed images either with the naked eye 161a, 161b and / or through glasses with non-polarized lenses and / or through glasses 400 with polarized lenses 410a, 410b. Figure 6 shows this process schematically. Figure 6a shows the image-generating device 100 from Figure 1, which is viewed by the subject 170 at a distance D. No polarizing element, such as polarizing lenses in a frame, is positioned between the eyes 161a, 161b of the subject 160 and the image-generating device 100. An overlay of the images is perceived. With differently defined first and second polarization planes of image points 112a, 112b, 112c,..., without a polarizing element, such as polarizing spectacle lenses in the beam path, no intensity difference dependent on the polarization axis is perceived between the first polarized image and the second polarized image. If polarizing lenses are placed in a frame between the eyes 161a, 161b of the subject 170 and the image-generating device 100, a difference in image intensity will be perceived if the first and second polarization planes are defined differently. This difference in intensity can be used to compare different polarizing lenses in the same frame. In particular, it can be investigated whether the lenses in the frame exhibit polarizing properties. Fig. 4b) shows the case where the glasses 400, comprising the polarizing lenses 410a, 410b in the frame 402, are placed in close proximity to the subject 170. "In close proximity to the subject 170" means that the distance from the subject 170 to the polarizing lenses 410a, 410b is less than 30% of the distance D. In particular, the polarizing lenses 410a, 410b in the frame 402 can be worn by the subject 170 on the nose 160 as intended. Fig. 4c) shows the case where the polarizing glasses 400 are placed in close proximity to the imaging device 100. "In close proximity" means that the distance between the imaging device 100 and the polarizing lenses in a frame 320 is less than 30% of the distance D. In particular, the polarizing glasses 400 can be placed at a distance of 0 cm to 10 cm from the imaging device 100. Fig. 8a) shows a first polarized image 210 and a second polarized image 220, as well as the resulting superimposed polarized image 230. The first and second polarized images 210, 220 differ in their optical properties. In this embodiment, the first polarized image 210 consists of pixels (e.g., corresponding to pixels 210a, 210b, 210c, ... according to Fig. 2) with a first defined polarization plane, where the polarization plane is vertical. The second polarized image 220 consists of pixels (e.g., 220a, 220b, 220c, ...) with a second defined polarization plane, where the polarization plane is horizontal. The first image 210 is entirely in a first color, and the second image 220 is entirely in a second color. In this example, green is chosen as the first color, and red is chosen as the second color. If no polarizing element, such as polarizing spectacle lenses 410a, 410b in a frame 402, is positioned between the eyes 161a, 161b of the subject 160 and the image generating device 100, then the superimposed polarized image 230 is perceived. The superimposed polarized image 230 appears as yellow in this first embodiment. If polarized lenses 410a, 410b are located between the eyes 161a, 161b of the subject 160 and the display 110, which, as desired for sunglasses, have a defined polarization axis 411a, 411b of 90° for both polarized lenses 410a, 410b, or each have a horizontally oriented polarization plane parallel to a frame horizontal 401, which may be marked by markings 412, 412a, 412b, then at a high degree of polarization P only the first image 210 is displayed, since in this case the polarization plane of the image points 210a, 210b, 210c of the first image 210 is approximately parallel with the polarization axis 411a of the polarized lenses 410a, 410b. Thus, the transmission plane 414 coincides with the polarization plane of the image points 210a, 210b, 210c of the first image 210.The polarization plane of the image points 220a, 220b, 220c of the second image 220 forms an angle of 90° with the polarization axis 410a, 410b of the polarized spectacle lenses 410a, 410b, or coincides with the polarization plane, so that the second image 220 is perceived with very low intensity. In this first embodiment, it is irrelevant whether the polarizing spectacle lenses 410a, 410b in the frame 402 are placed in the vicinity of the subject 170 as shown in Fig. 6b) or in the vicinity of the image generation device 100 as shown in Fig. 6c). In another embodiment not shown graphically, two images with identical shapes and intensity distributions B1(x,y) and B2(x,y) are generated by the computer. Here, x and y are the index of the column and row, respectively, on the display. The function value B1 or B2 at such a point x,y indicates the brightness of a pixel, or, in the case of color display, the brightness of the respective colors red, green, and blue. Image B1 differs from image B2 only in its optical properties. In particular, image B1 exhibits reduced reflections, reduced glare, or similar characteristics. Mathematically, for every point x,y, B2(x,y) ≥ B1(x,y). If a first polarized image 210 is represented by the intensity distribution B1(x,y) and a second polarized image 220 by the intensity distribution B2(x,y)-B1(x,y), the resulting superimposed polarized image 230 is given by an intensity distribution B2(x,y). If no polarizing element, such as polarizing spectacle lenses 410a, 410b in a frame 402, is positioned between the eyes 161a, 161b of the subject 160 and the image generating device 100, then the superimposed polarized image 230, i.e. the intensity distribution B2(x,y), is perceived. If polarized lenses 410a, 410b are positioned between the eyes 161a, 161b of the subject 160 and the display 110, and these lenses, as desired for sunglasses, each have a defined polarization axis 411a, 411b of 90° or a horizontally oriented polarization plane parallel to a frame horizontal 401, which may be marked by markings 412, 412a, 412b, then at a high degree of polarization P only the first image 210, i.e., the intensity distribution B1(x,y), is displayed, since in this case the polarization plane of the image points 210a, 210b, 210c of the first image 210 is approximately parallel to the polarization axis 411a of the polarized lenses 410a, 410b. This means that the transmission plane 414 coincides with the polarization plane of the image points 210a, 210b, 210c of the first image 210.The polarization plane of the image points 220a, 220b, 220c of the second image 220 forms an angle of 90° with the polarization axis 410a, 410b of the polarized spectacle lenses 410a, 410b, or coincides with the polarization plane, so that the second image 220 is perceived with very low intensity. With polarized lenses 410a, 410b in a frame 402 with a polarization axis 411a, 411b defined for both polarized lenses 410a, 410b that differs from 90°, or with a low degree of polarization P, or with other quality defects, such as an uneven distribution of the degree of polarization across the surface of the lenses 410a, 410b, the wearer 170 sees a superposition of the first and second images 210, 220, as shown in Fig. 8c). This allows for a direct comparison between different qualities of polarized lenses 410a, 410b. If the polarization axis 411a, 411b of the polarizing lenses 410a, 410b deviates completely from 90° or if the polarization plane deviates completely from the frame horizontal 401, it is possible that the second image 220 is perceived with higher intensity than the first image 210. This case is shown in Fig. 8d). Fig. 8e) shows an example of a realistic case of the visual impression with low-quality polarizing lenses 410a, 410b, as known from many experiments. The visual impression through the polarizing lens 410 with a polarization axis 411a is shown. In the center of the polarizing lens 410, the first polarizing image pattern 210 is still predominantly displayed. In this example, only the color green is visible in the center. At the edge of the polarizing lens 410, an overlay of the first and second images 210, 220 is already visible. The color impression is already yellow. In addition, inhomogeneities of the polarizing lens 410 can be seen, which appear as zones with a low degree of polarization 800a, 800b, 800c, 800d. It is therefore possible with the present invention to make various defects in polarizing spectacle lenses 410a, 410b visible. Fig. 9, in conjunction with Figs. 10 and 11, shows a device 100 with which a three-dimensional visual impression can be generated for a viewer 170. Fig. 9 is a partial section of the arrangement shown in Fig. 1, comprising the device 100 according to the invention and the subject 170 along line II in Fig. 1. The display 110 shown in Fig. 9 comprises an arrangement 1230 of a plurality of pixels 210a, 210b, 210c, ...1210a, 1210b, 1210c, ..., 220a, 220b, 220c, ...1220a, 1220b, 1220c, ..., which are arranged in a checkerboard pattern, as shown in partial top view in Fig. 10. The image points 210a, 210b, 210c, 210d, 210m, 210n, ... as well as 220a, 220b, 220c, 220d, 220m, 220n ... are intended for exclusive viewing by the left eye 161a, the image points 1210a, 1210b, 1210c, 1210d, 1210m, 1210n, ... as well as 1220a, 1220b, 1220c, 1220d, 1220m, 1220n ... are intended for exclusive viewing by the right eye 161b. Light 25a, 25b, exiting the display 110 through pixels 210a, 210b, 210c, ...1210a, 1210b, 1210c in the direction of the viewer 170, exhibits linear polarization with a vertical polarization direction. Light 25a, 25b, exiting the display 110 through pixels 220a, 220b, 220c, ...1220a, 1220b, 1220c, ...The image exiting the display 110 in the direction of the viewer 170 exhibits a linear polarization with a horizontal polarization direction. This results in a superimposed image 230, 1230 for each eye 161a, 161b with horizontally and vertically polarized pixels 210a, 210b, 210c, ...1210a, 1210b, 1210c, ..., 220a, 220b, 220c, ...1220a, 1220b, 1220c, ...as already described in detail above for Fig. 2. In the present embodiment, the display 110 is equipped with a parallax mask 37 forming an aperture system. The mask 37 of the aperture system 36 is arranged on a transparent support element 38. Fig. 11 shows a top view of a section of this mask 37 for the aperture system. Mask 37 has offset regions 90a, 90b, 90c, ..., which are opaque to the light 25a, 25b of the pixels 210a, 210b, 210c, ..., 1210a, 1210b, 1210c, ..., 220a, 220b, 220c, ..., 1220a, 1220b, 1220c, ... of the display 110. Regions 92a, 92b, 92c, ... of mask 37 are complementary to regions 90a, 90b, 90c, .... Regions 92a, 92b, 92c, ... are transparent to the light 25a, 25b of the display 110. The areas 90a, 90b, 90c, ... on the one hand, and the areas 92a, 92b, 92c, ... , 94b, 94c, ... on the other hand, each have a rectangular shape similar to the pixels 210a, 210b, 210c, ... 1210a, 1210b, 1210c, ..., 220a, 220b, 220c, ... 1220a, 1220b, 1220c, ... . The areas 90a, 90b, 90c, ... and 92a, 92b, 92c are arranged in consecutive rows 94. In adjacent rows 94a, 94b; 94b, 94c are the areas 92a, 92b, 92c, ... which are translucent to light and are positioned offset from the areas 90a, 90b, 90c, ... which are opaque to light 25a, 25b. The width BMuder of the areas 92a, 92b, 92c, ... which are opaque to light 25a, 25b, is greater than the width BMdder of the areas that are translucent to light 25a, 25b. The following is preferred: The mask 37, with its rectangular areas 90a, 90b, 90c; 92a, 92b, 92c, which are transparent and opaque to the light from the display 110, separates the light 25a, 25b for the left and right eyes 161a, 161b of the subject 170 in the light transmission plane 41. The light transmission plane 41 of the mask 37 is freely movable within the display 110. For this purpose, the display 110 includes an adjustment mechanism (not shown) for the aperture system. The adjustment mechanism allows the aperture system to be moved horizontally and in the horizontal direction perpendicular to the direction of the double arrow 43, as indicated by the double arrow 43 in Fig. 9. For adjustment, the adjustment device contains a piezoelectric drive which can be controlled by the computer 150 via a driver assembly depending on an angular position α of the eyes 161a, 161b of the subject 170 captured by a camera not shown, from the display 110.The adjustment device makes it possible to vary the distance z of the plane 42 of the display 110 from the light transmission plane 41 of the aperture 37 in the range 8 mm ≤ z ≤ 15 mm. Based on the center 27 of the pupillary distance PD, detected by the computer 150 and the camera (not shown), the adjustment device sets and tracks the aperture system so that the line 29 through points 27 and the vertical line 31 behind the aperture 37 on the plane 42 of the display 110 intersects the boundary of two adjacent display zones 210a / 220a, 1210a / 1220a, 210b / 1210b ... The position of display zones 210a / 220a, 210b / 1210b ... and display zones 1210a / 1220a, 1210b / 1220b,... of display 110 is adjusted to the relocation of mask 37.For adjusting the aperture system, the computer determines from the angle γ at which the camera detects the center 27 of the pupil distance PD with respect to the surface normal 29 in the center 31 of the mask 37, a favorable horizontal displacement V of the mask 37 parallel to the direction 39, i.e. perpendicular to the drawing plane and parallel to the light transmission plane 41. The favorable shift of mask 37 therefore satisfies the following relationship: Here, S is the location of the center of the perpendicular projection of the pupillary distance PD in the plane 41 of the mask 37 from the surface normal 29 on the vertical line 29. g is the distance of the subject 170 from the light transmission plane 41 of the aperture system. Reference symbol list α Viewing angle β Angle B1 Intensity distribution B2 Intensity distribution D Distance of subject from display BMd Width of the transparent areas of the mask BMu Width of the opaque areas of the mask g Distance of subject from the plane of light transmission γ Angle PD Pupillary distance S Position V Displacement x Direction, Index y Direction, Index z Direction, Distance 25a Light for the right eye 25b Light for the left eye 27 Point 29 Line 31 Point 37 Mask 38 Support element 41 Plane of light transmission 42 Plane 43 Double arrow 90a Opaque area 90b Opaque area 90c Opaque area ... 92a Transparent area 92b Transparent area 92c Transparent area ... 100 Device 102 Image generating device 110 Display 112a Pixel 112b Pixel 112c Pixel 114 First image 116 Second image 118 Display image 120 Driver group 122a Subject of the first image 122b Subject of the second image 122 Subject 140 Light source for activating phototropicSpectacle lenses 150 Computing unit, computer 152 Memory 160 Nose 161a Right eye 161b Left eye 170 Subject 210 First polarized image 210a Image point with a first defined polarization axis 210b Image point with a first defined polarization axis 210c Image point with a first defined polarization axis 220 Second polarized image 220a Image point with a second defined polarization axis 220b Image point with a second defined polarization axis 220c Image point with a second defined polarization axis 230 Superimposed polarized image 310 First polarized image 310a Image point with a first defined polarization axis 310b Image point with a first defined polarization axis 310c Image point with a first defined polarization axis ... 320 Second polarized image 320a Image point with a second defined polarization axis 320b Pixel with a second defined polarization axis 320c Pixel with asecond defined polarization axis ... 330 superimposed polarized image 330a pixel with polarization axis determined by vector addition 330b pixel with polarization axis determined by vector addition 330c pixel with polarization axis determined by vector addition ... 400 spectacles 402 frame 404 frame horizontal 410 polarizing lens 410a polarizing lens for the right eye 410b polarizing lens for the left eye 411 polarization axis 411a polarization axis 411b polarization axis 412 markings 412a markings 412b markings 413 plane of polarization 414 plane of transmission 416 light incident on lens 416a polarization direction 416b polarization direction 417 lens transmitting light 417a polarization direction 418 direction of propagation 420 polarizing Spectacle lenses in a frame 502 Process step 504 Process step 506 Process step 508 Process step 510 Process step 512Process step 514 Process step 516 Process step 518 Process step 800a Low polarization zone 800b Low polarization zone 800c Low polarization zone 800d Low polarization zone 1210 First polarized image for the right eye 1210a Image point with a first defined polarization axis 1210b Image point with a first defined polarization axis 1210c Image point with a first defined polarization axis ... 1220 Second polarized image for the left eye 1220a Image point with a second defined polarization axis 1220b Image point with a second defined polarization axis 1220c Image point with a second defined polarization axis ... 1230 Superimposed polarized image

Claims

Device (100) for demonstrating the visual impression for a wearer (170) of spectacles (400) with polarizing lenses (410a, 410b) comprising: a) a memory (152) for providing a first image (114, 210, 310) with a motif and an associated first polarization direction; b) a memory (152) for providing a second image (116, 220, 320) with the same motif and an associated second polarization direction different from the first polarization direction; c) a display device (110) for displaying the first image (114, 210, 310) with light polarized in the first polarization direction and the second image (116, 220, 320) with light polarized in the second polarization direction in a superimposed, namely composite, representation (118, 230, 330), such that the motif of the first image (114, 210, 310) and the motif of the second image (116, 220, 320) coincide in form identically, where (cl) the first image (114, 210,310) is a photograph taken by a camera with a polarizing filter in front of it, having a first polarization axis, and the second image (116, 220, 320) is a photograph taken by a camera with a polarizing filter in front of it, having a second polarization axis different from the first polarization axis, or (c2) the first image (114, 210, 310) is a photograph taken by a camera with a polarizing filter in front of it, having a first polarization axis, and the second image (116, 220, 320) is a computer-generated modification of the first image (114, 210, 310), such that the second image (116, 220, 320) corresponds to a photograph taken by a camera with a polarizing filter in front of it, having a second polarization axis different from the first polarization axis. Device (100) according to one of the preceding claims, characterized in that the first image (114, 210, 310) and the second image (116, 220, 320) differ in at least one optical property, in particular in at least one of the optical properties from the group consisting of contrast, brightness, saturation and hue. Device (100) according to one of the preceding claims, characterized in that the displayed first image (114, 210) consists of first image points (112a, 112c, 210a, 210b, 210c, 210d, 210e) arranged in the manner of the squares of one of the colors of a chessboard pattern and that the displayed second image (116, 220) consists of second image points (112b, 220a, 220b, 220c, 220d, 220e) arranged in the manner of the squares of the other color of the chessboard pattern. Device (100) according to one of claims 1 or 2, characterized in that the first image (114, 310) consists of image points (112a, 112b, 112c, 310a, 310b, 310c, ...) arranged in the manner of the squares of a chessboard pattern, and that the second image (116, 320) consists of the same image points (112a, 112b, 112c, 320a, 320b, 320c, ...), and that the respective displayed image points (330a, 330b, 330c, ...) contain the information of the corresponding image point (310a, 310b, 310c, ...) of the first image (114, 310) and the information of the corresponding image point (320a, 320b, 320c, ...) of the second image (116, 320). second image (116, 320) contains the polarization direction of the vector addition of the polarization direction vectors taking into account the intensity of the corresponding image points (310a, 310b, 310c,..., 320a, 320b, 320c,..) of the first image (114, 310) and the second image (116, 320). Device (100) according to one of the preceding claims, characterized in that an optical assembly (37) is arranged which separates the light (25a) supplied to the optical beam path by a first group of predetermined areas (210a, 210b, 210c, 210d, 210m, 210n, ... as well as 220a, 220b, 220c, 220d, 220m, 220n) of the display device (110) from the light (25b) which is supplied to the beam path by a second group of predetermined areas (1210a, 1210b, 1210c, 1210d, 1210m, 1210n, ... 1220a, 1220b, 1220c, 1220d, 1220m, 1220n ...) of the display device (110) is supplied to supply the light (25a) from the first group of selected areas (210a, 210b, 210c, 210d, 210m, 210n, ... ,220a, 220b, 220c, 220d, 220m, 220n) of the display device (110) to the left eye (161a) of the wearer (170) and to direct the light (25b) from the second group of selected areas of the display device (110) to the right eye (161b) of the wearer (170). Device (100) according to one of the preceding claims, characterized in that a light source (140) is provided for activating photochromic spectacle lenses (410a, 410b). Method for demonstrating the visual impression for a wearer (170) of spectacles (400) with polarizing lenses (410a, 410b), comprising the steps: a) providing (512) a first image (114, 210, 310) with a motif and an associated first polarization direction; b) providing (512) a second image (116, 220, 320) with the same motif and an associated second polarization direction different from the first polarization direction; c) displaying (514) the first image (114, 210, 310) with light polarized in the first polarization direction and the second image (116, 220, 310) with light polarized in the second polarization direction in a superimposed, namely composite, representation (118, 230, 330), such that the motif of the first image (114, 210, 310) and the motif of the second image (116, 220, 310) coincide in form identically, where (c1) is the first image (114, 210,310) a photographic image from a camera with a polarizing filter in front of it, with a first polarization axis, is used, and / or that as the second image (116, 220, 320) a photographic image from a camera with a polarizing filter in front of it, with a second polarization axis different from the first polarization axis, is used, or (c2) as the first image (114, 210, 310) a photographic image from a camera with a polarizing filter in front of it, with a first polarization axis, is used, and as the second image (116, 220, 320) a computer-generated modification of the first image (114, 210, 310) is used, such that the second image (116, 220, 320) corresponds to a photographic image from a camera with a polarizing filter in front of it, with a second polarization axis different from the first polarization axis. Method according to claim 7, characterized in that the first image (114, 210, 310) and the second image (116, 220, 320) differ in at least one optical property, in particular in at least one of the optical properties from the group consisting of contrast, brightness, saturation and hue. Method according to one of claims 7 or 8, characterized in that the displayed first image (114, 210) consists of first image points (112a, 112c, 210a, 210b, 210c,...) arranged in the manner of the squares of one of the colors of a chessboard pattern and that the displayed second image (116, 220) consists of second image points (112b, 220a, 220b, 220c,...) arranged in the manner of the squares of the other color of the chessboard pattern. A method according to any one of claims 7 to 9, characterized in that the first image (114, 310) consists of image points (112a, 112b, 112c, 310a, 310b, 310c,...) arranged in the manner of the squares of a chessboard pattern, and that the second image (116, 320) consists of the same image points (112a, 112b, 112c, 320a, 320b, 320c, ...), and that the respective displayed image points (112a, 112b, 112c, 330a, 330b, 330c,...) contain the information of the corresponding image point (112a, 112b, 112c, 310a, 310b, 310c,...) of the first image (114, 310) and contains the information of the corresponding image point (112a, 112b, 112c, 320a, 320b, 320c, ...) of the second image (116, 320), where the polarization direction corresponds to the vector addition of the polarization direction vectors taking into account the intensity of the corresponding image points (112a, 112b, 112c, 310a, 310b, 310c,..., 320a, 320b, 320c, ...) of the first image (114, 310) and the second image (116, 320). Method according to one of claims 7 to 10, characterized in that the first polarization direction is horizontal and the second polarization direction is vertically aligned. Method according to one of claims 7 to 11, characterized by the step: d) Positioning (516) the carrier (170) to view the displayed images (114, 210, 310, 116, 220, 320) in superimposed representation (118, 230, 330) optionally with the naked eye (161a, 161b) and / or through spectacles with non-polarizing lenses and / or through the spectacles (400) with the polarizing lenses (410a, 410b). Method according to claim 12, characterized in that the polarizing spectacle lenses are photochromic spectacle lenses (410a, 410b) and that a light source (140) activating the photochromic spectacle lenses (410a, 410b) is switched on.

Images