Glasses, stereo glasses, projection system and stereo projection system

Abstract

The invention relates to a pair of glasses 10, or stereoscopic glasses 10, for a stereo projection system operating using 3D wavelength multiplexing (WMT) technology. The stereoscopic glasses 10 comprise a first lens 1a with a first interference filter and a second lens 1b with a second interference filter. The interference filters each have spectral transmission bands BL, BR, GL, GR, RL, RR and stopbands, wherein the spectral stopbands of one interference filter comprise the transmission bands BL, BR, GL, GR, RL, RR of the other interference filter in the visible frequency range. The lenses 1a, 1b, designed as interference filters, are provided with at least three transmission bands BL, BR, GL, GR, RL, RR with an average bandwidth of less than or equal to 25 nm, wherein at least one transmission band is arranged in each of the primary colors red, green, and blue.The lenses 1a and 1b are designed as mineral interference filters, specifically with a mineral glass base, and are curved with a radius of curvature of approximately 100 mm. This minimizes distortion in harmonious color perception and contrast.

Description

TECHNICAL FIELD

[0001] The invention relates to glasses, in particular stereo glasses for a stereo projection system operating by means of 3D wavelength division multiplexing technology (WMT), as well as a corresponding projection system or stereo projection system. STATE OF THE ART

[0002] Various types of glasses, particularly stereo glasses, are known from the state of the art and are used to create a spatial depth effect in the human brain when viewing 3D films or 3D images.

[0003] To achieve this, two images are required, one for the left and one for the right eye, captured from two different perspectives. These partial perspective images must be perceived simultaneously but separately by each eye to generate a spatial impression in the brain. To achieve separate perception for each eye, appropriate filters are used so that each eye is presented with only the stereoscopic partial perspective image intended for that eye.

[0004] For this purpose, there are various types of stereo glasses equipped with appropriate filters. For example, stereo glasses for anaglyph-separated imaging contain a red filter for the left eye and a green filter for the right eye. Other filter colors include, for example, a red filter for the right eye and a cyan filter for the left eye (Deep Vision System), a blue filter for the right eye and a yellow / orange filter for the left eye (ColorCode 3-D), a green filter for the left eye and a magenta filter for the right eye, etc.

[0005] A nearly color-neutral stereo projection system is provided by the use of interference filter glasses, in which the primary colors of the images for the left and right eye are reduced to different, non-overlapping wavelength ranges.

[0006] For this purpose, a technology using interference filter glasses for generating and reproducing optically three-dimensional, stereoscopic images is known in the prior art. This technology is referred to as wavelength division multiplexing (WMT). Variants of this wavelength division multiplexing (WMT) technology are described, for example, in the following patents: DE 198 08 264 A1; DE 199 24 167 B4; DE 100 05 335 C2; DE 100 57 102 B4; DE 102 49 815 B4; DE 103 59 788 B4; EP 2 399 165 A1; DE 10 2006 054 713 B4.

[0007] For example, DE 10 2006 054 713 B4 discloses a method for generating an optically three-dimensional image reproduction that offers good color reproduction and reliable perspective partial image separation. Color filters for the two perspective partial images to be formed are configured such that the number of transmission bands is reduced compared to the known prior art. The number of transmission bands is less than 5, and these 5 or fewer transmission bands do not overlap mutually. At least one of the transmission bands is arranged in the range of two color perceptions of blue (B), green (G), or red (R). The other transmission bands are arranged in the frequency spectrum such that they are arranged in the range of a single color perception, i.e., blue, green, or red.These transmission bands for color perception preferably exhibit a bandwidth in the range of approximately 30 nm or significantly less, which allows for reliable demarcation and arrangement within a color perception range and ensures reliable demarcation or separation from the other transmission bands. Furthermore, the transmission bands are arranged such that they are sufficiently spaced from one another. The above-specified arrangement produces a particularly natural color perception.

[0008] The wavelength division multiplex technology described above for color-true, three-dimensional reproduction and perception using corresponding stereo projection systems and stereo glasses is often used in amusement parks, cinemas, museums and many other facilities, whereby the same image content is transmitted to all users or wearers of the stereo glasses.

[0009] The disadvantage here is that although these glasses have a considerable contrast, an increased contrast reproduction is desirable. DESCRIPTION OF THE INVENTION

[0010] The invention is based on the object of providing glasses, in particular stereo glasses, for a stereo projection system operating by means of 3D wavelength division multiplex technology (WMT) as well as a corresponding stereo projection system, which enables the user or wearer to have a very high-contrast representation of the environment, which may contain reproduced image information.

[0011] The object is achieved according to the invention with a pair of glasses having the features specified in claim 1, with a projection system having the features specified in claim 12, and with a stereo projection system having the features specified in claim 13.

[0012] Advantageous embodiments of the invention are the subject of the subclaims.

[0013] The spectacles according to the invention are provided with a first spectacle lens with a first interference filter and a second spectacle lens with a second interference filter, wherein the interference filters each exhibit spectral transmission and stop bands. The spectacle lenses designed as interference filters are provided with at least three transmission bands with an average bandwidth of less than or equal to 25 nm, wherein at least one transmission band is arranged in the primary colors red, green, and blue.

[0014] These extremely narrow transmission bands are accompanied by correspondingly large, broad stopbands, resulting in extensive frequency ranges of ambient light being blocked from passing through the lenses, creating a high-contrast impression for the wearer. If the visible environment contains an image projector for projection onto a screen and / or a screen displaying a 2D image, which generates a 2D image using laser light sources or other corresponding narrowband light sources, and in which the light from each of the very narrowband light sources falls into a transmission band of the lenses, the glasses can be used to create a harmonious, colorful, and very high-contrast impression for the wearer.By extensively suppressing ambient light with the help of wide and distinct stopbands, the disruptive influence of this suppressed ambient light can be limited without suppressing the generated 2D images in any way. This allows the perception of 2D images with particularly high contrast and color fidelity. This design of the glasses is therefore particularly suitable for environments with this type of projection system. Such projection systems are used in amusement parks, among other places. The same applies to analog applications within stereo projection systems that operate using 3D wavelength division multiplexing (WMT) technology.

[0015] The lenses are mineral interference filters, typically made with metal oxides. These lenses are typically formed with a mineral glass substrate and are curved with a radius of curvature in the range of 100 mm. The mineral interference filter on a mineral glass substrate creates a very robust and stable lens whose optical and mechanical properties complement each other harmoniously. In addition to a mineral glass substrate, plastic substrates have proven successful for lens construction.

[0016] The first and second spectacle lenses are each provided with a curvature, which is in particular cylindrical, spherical cap-shaped, or spherical segment-shaped. This results in a spherical curvature of the spectacle lenses. It should be noted that the terms "spherical cap-shaped" and "spherical segment-shaped" are understood as equivalent terms.

[0017] One advantage of providing the curvature is that it can prevent or at least reduce the problems that occur with interference filters. For example, the wearer of the glasses does not always look straight ahead, i.e. vertically, through the lenses, but can also look towards the edges of the lenses. However, with such an oblique viewing angle, color distortions occur without the curvature of the lenses due to the light not being incident centrally. This is because the layers of the interference filters on the lenses have the same or essentially the same thickness across the surface of the lenses. They are transparent to certain frequencies or wavelengths and block other frequencies or wavelengths, which depends on the length of time the light has to travel through the layers of the interference filters.However, if the wearer of the stereo glasses looks through the lenses at an angle instead of vertically, the length of the light passing through them will be different and color distortions will occur.

[0018] These color distortions are primarily due to a shift in the transmission bands of the lenses. These can be compensated or at least reduced by curved lenses.

[0019] This interplay of narrow transmission bands and curved mineral lenses creates a good, harmonious, and colorful impression for the wearer, which also proves to be very high in contrast. This is achieved precisely by the narrow transmission bands with the extensive stop bands in between, without compromising the harmonious color impression. Furthermore, the image through the glasses is characterized by low directional dependence, which leads to a very pleasant perception of the surroundings through the glasses.This low degree of directional dependence is achieved precisely by limiting the angle of incidence of the light onto the lenses and thus onto the interference filters, perpendicular or nearly perpendicular, and thus limiting the deviation from the perpendicular, so that the deviation has only a minimal negative impact on the transmission of the light and on the harmonious color impression at high contrast.

[0020] A particularly advantageous development of the glasses is characterized by the fact that the lenses, designed as interference filters, are provided with at least three transmission bands with an average bandwidth of less than or equal to 15 nm, with at least one transmission band being arranged in each of the primary colors red, green, and blue. This makes it possible, on the one hand, to achieve particularly strong suppression of stray light from unwanted ambient light and, on the other hand, to provide the wearer with a projection system for 2D images or a stereo projection system according to the invention with a particularly high-contrast, harmonious, and colorful impression.

[0021] A particular development of the invention shows stereo glasses for a stereo projection system operating using 3D wavelength division multiplexing (WMT) technology. The stereo glasses have a first lens with a first interference filter and a second lens with a second interference filter with respective spectral transmission and stopbands, wherein the spectral stopbands of one interference filter encompass the transmission bands of the other interference filter in the visible frequency range. These stereo glasses prove particularly advantageous when generating a 3D image using laser light sources or other corresponding narrowband light sources in a stereo projection system operating using 3D wavelength division multiplexing (WMT).The design of the lenses of the stereo glasses allows them to be used for the left-right separation of the 3D images or videos projected using the wavelength division multiplexing method, without neglecting the harmonious and colorful as well as very high-contrast impression for the user of the glasses.

[0022] A particularly advantageous development of the glasses is characterized by the lenses having a radius of curvature between 90 and 120 mm. This choice of curvature radius, especially for the entire lenses, makes it possible to keep the directional dependence of the incident light on the glasses particularly low. With these radii of curvature, it is possible to keep the angle of incidence of the light on the lenses and thus on the interference filters perpendicular or nearly perpendicular, thus significantly limiting the disruptive deviation from the perpendicular, allowing a harmonious color impression with high contrast.

[0023] A particularly advantageous development of these glasses is characterized by the fact that the bandwidth of the transmission bands of a lens increases with increasing wavelength. This enables a particularly harmonious color impression with high contrast. Different sensitivities in color perception are compensated for, especially when light is incident at an angle.

[0024] A particularly advantageous refinement of the glasses is characterized by the fact that the average bandwidths of the transmission band in the primary color red are at least 10 nm wider than the average bandwidths of the transmission band in the primary color blue. This makes it possible to achieve a particularly harmonious color impression with high contrast. Different sensitivities in color perception are compensated for, especially when light is incident at an angle.

[0025] A particularly advantageous development of the glasses is characterized by the design of the glasses so that the distance between the lenses and the eyeball with the crystalline lens is between 20 and 30 mm. This minimizes the deviation between the focal point of the lenses and the center of the eyeball, thus minimizing the risk or degree of distortion in harmonious color perception and contrast.

[0026] A particularly advantageous refinement of the glasses is characterized by the fact that the interference filters are formed at least partially by coating the first and second lenses. This refinement allows the interference filters, and thus the glasses, to be implemented particularly simply, efficiently, and cost-effectively.

[0027] A particularly advantageous development of the spectacles is characterized in that the coatings of the interference filters of the lenses have different layer thicknesses depending on their position on the lens, with the layer thickness being greater in the edge region of the lens than in the central region of the lens. In addition to providing the curvature of the lenses, the layer thickness of a coating on the lenses, which can comprise multiple layers, is also increased towards the edges in order to at least partially compensate for the changed transmission length when light is incident at an angle and thus for color distortions and image distortions due to the angled transmission through the lenses or through the interference filters at the edges of the lenses, thus enabling particularly harmonious color perception with high contrast.

[0028] A particularly advantageous development of the glasses is characterized by the fact that the layer thicknesses remain the same or, in particular, increase continuously from the center to the edge. These layer thicknesses, which vary evenly depending on the direction of light penetration, make it particularly possible to achieve a uniformly changing penetration length when light is incident at an angle. This allows for a particularly uniform and harmonious reduction of color distortions and image distortions caused by the angled passage through the lenses or by the interference filters at the edges of the lenses, thus enabling particularly harmonious color perception with high contrast.

[0029] A particularly advantageous development of the glasses is characterized in that the lenses are held by a frame which at least partially blocks the incidence of light that does not pass through the lenses into the eye of the wearer. This is preferably achieved in that the temples of the glasses are flat and limit the lateral incidence of stray light, or in that the frame around the lenses is wide and extends towards the wearer's face and limits the incidence of stray light from above or below, or in that the bridge between the lenses is widened so that the incidence of stray light is limited in the area of ​​the bridge. The reduced stray light enables improved color perception and improved contrast.

[0030] Furthermore, the invention provides a projection system comprising at least one image projector and / or at least one screen for displaying a 2D image on a screen using laser light sources or other corresponding narrowband light sources, and at least one pair of spectacles according to the invention having the features and advantages described above. These spectacles prove particularly advantageous when generating a 2D image using laser light sources or other corresponding narrowband light sources, whose light falls into a respective transmission band of the spectacle lenses. This configuration of the spectacle lenses as part of the projection system enables a harmonious, colorful, and very high-contrast color impression for the wearer of the spectacles.

[0031] Furthermore, the invention provides a stereo projection system comprising at least one stereo image projector and / or at least one stereo screen for displaying a stereo image on a screen using 3D wavelength division multiplexing (WMT) technology, and at least one pair of stereo glasses according to the invention with the features and advantages described above. These stereo glasses prove particularly advantageous when generating a 3D image using laser light sources or other corresponding narrowband light sources in a stereo projection system operating using 3D wavelength division multiplexing (WMT).This design of the lenses of the stereo glasses allows them to be used for the left-right separation of the 3D images or videos projected using the wavelength division multiplexing method, without neglecting the harmonious and colorful as well as very high-contrast color impression for the user of the glasses.

[0032] A particularly advantageous development of the projection system or stereo projection system is characterized in that the light sources of the image projector or screen or stereo image projector or stereo screen are laser light sources or other corresponding narrowband light sources with an average bandwidth of a few nm, whose light falls into a transmission band of the spectacle lenses. This preferably occurs for all transmission bands in the region of the lower edge of the respective transmission band. This makes it possible to compensate for shifts in the transmission bands of the spectacle lenses towards shorter wavelengths when the interference filters of the spectacle lenses are illuminated at different angles, and to very reliably ensure the perception of images from the image projector or screen or stereo image projector or stereo screen.This largely prevents color distortions and provides a harmonious, colorful, and highly contrasting color impression for the user of the projection system or stereo projection system.

[0033] The invention is explained below using preferred embodiments with reference to the figures. The invention is not limited to these preferred embodiments. Fig. 1 shows a schematic representation of an exemplary pair of glasses or stereo glasses in connection with the eyes of a user and thus in the worn state according to the invention; Fig. 2 shows a schematic representation of an exemplary pair of glasses in a side view Fig. 3 shows a schematic representation of an exemplary filter characteristic of the two spectacle lenses of an exemplary stereo spectacle according to the invention or their imaging devices.

[0034] Fig. 1 shows an exemplary pair of stereo glasses 10 according to the invention for a stereo projection system operating using 3D wavelength division multiplexing (WMT) technology. The stereo glasses 10 have a first lens 1a with a first interference filter and a second lens 1b with a second interference filter. The interference filters each have spectral transmission bands BL, BR, GL, GR, RL, RR and stop bands, wherein the spectral stop bands of one interference filter comprise the transmission bands BL, BR, GL, GR, RL, RR of the other interference filter in the visible frequency range. The lenses 1a, 1b designed as interference filters are provided with at least three transmission bands BL, BR, GL, GR, RL, RR with an average bandwidth of less than or equal to 25 nm or 15 nm, wherein at least one transmission band is arranged in the primary colors red, green, and blue.The lenses 1a and 1b are designed as mineral interference filters, particularly with a mineral glass substrate, and are curved with a radius of curvature in the range of 100 mm. The mineral interference filter on a mineral glass substrate creates a very robust and stable lens whose optical and mechanical properties complement each other harmoniously.

[0035] The first and second spectacle lenses 1a, 1b are each provided with a curvature which is shaped like a spherical segment and is thus spherical.

[0036] One advantage of providing the curvature is that it can prevent or at least reduce the problems associated with interference filters. For example, the wearer of glasses 10 does not always look straight ahead, i.e., vertically, through the lenses 1a, 1b, but can also look toward the edges of the lenses 1a, 1b.

[0037] However, at such an oblique viewing angle, the non-centrally incident light without the curvature of the lenses 1a, 1b leads to shifts in the transmission bands and thus to color distortions. This is because the layers of interference filters on the lenses 1a, 1b have the same or almost the same thickness across the surface of the lenses 1a, 1b. They are transparent to a specific frequency or wavelength and block other frequencies or wavelengths, which is related to the light transmission length through the layers of interference filters. If the wearer of the stereo glasses 10 looks obliquely through the lenses 1a, 1b instead of perpendicularly, then different transmission lengths result, which leads to shifts in the transmission bands of the lenses and color distortions. These can be compensated for or at least reduced by the curved lenses 1a, 1b.

[0038] This interplay of narrow transmission bands BL, BR, GL, GR, RL, RR and curved mineral lenses 1a, 1b achieves a good, particularly harmonious, and colorful impression for the wearer of the glasses 10, which also proves to be very high in contrast. This is achieved precisely by the narrow transmission bands BL, BR, GL, GR, RL, RR with the extensive stop bands in between, without compromising the harmonious color impression. Furthermore, the image through the glasses 10 is characterized by a low degree of directional dependence, which leads to a very pleasant perception of the surroundings through the glasses 10.This low directional dependence is achieved precisely by selecting the angle of incidence of the light onto the lenses 1a, 1b and thus onto the interference filters to be perpendicular or nearly perpendicular, thus limiting the deviation from the perpendicular so that the deviation has only a slight negative influence on the transmission of the light and can only have a slight negative influence on the harmonious color impression at high contrast.

[0039] The Fig. 1 and Fig. The stereo glasses 10 shown in Figure 2 consist of the lenses 1a and 1b, which are held in place by means of a frame. The frame consists of two temples 2a for hanging behind the user's ears and a bridge 2b that connects the two lenses 1a, 1b, which are enclosed by a frame 2c. The two temples 2a are designed to be flat in such a way that they limit the lateral incidence of stray light. The frames 2c around the lenses 1a, 1b are designed to be wide and extend towards the wearer's face in such a way that they limit the incidence of stray light from above or below. Similarly, the bridge 2b between the lenses 1a, 1b is widened in such a way that the incidence of stray light in the area of ​​the bridge 2b is limited. The stray light reduced by these frames 2a, 2b, 2c enables improved color perception and improved contrast.

[0040] The stereo glasses 10 are characterized by the fact that the distance of the lenses 1a, 1b to the eyeball with the crystalline lens, and thus to the eye 3a, 3b, is between 20 and 30 mm. This minimizes the deviation between the focal point 5a, 5b of the lenses 1a, 1b and the center 4a, 4b of the eyeball 3a, 3b, thus minimizing the risk or degree of distortion in harmonious color perception and contrast. The distance between the eye 3a, 3b and the lens 1a, 1b can be measured along the line 8a, 8b.

[0041] Lines 7a, 7b represent a connecting line between the eye 3a, 3b or the focal point 5a, 5b of the lens 1a, 1b and the central area of ​​the lens 1a, 1b, where the line 7a, 7b pierces the lens 1a, 1b perpendicularly, allowing the incident light to pass through the interference filter of the lens 1a, 1b without distortion due to oblique incidence. Ideal vision through the spectacles 10 is provided here.

[0042] In contrast, the line 6a,6b, which represents a line from the point of intersection of the line 8a,8b through the spectacle lens 1a,1b to the focal point 5a,5b of the left and right spectacle lenses 1a,1b, respectively, shows that due to the divergence of the center of the eyes 3a,3b and the focal points 5a,5b, the light at the point of intersection does not pass through the spectacle lenses 1a,1b vertically but obliquely, in particular at different angles depending on the position of the point of intersection on the spectacle lens 1a,1b.

[0043] As a result, the light passes through the multiple coatings of the interference filters at different angles, resulting in color distortions and / or different transmission or blocking behavior. In extreme cases, this can even lead to the blocking and thus suppression of individual narrow bands of the light sources—especially with monochromatic lasers. An acceptable stereo color image can be lost if this is not counteracted by a sufficient degree of curvature of the lenses 1a, 1b, by the selection of the distance d between the lenses 1a, 1b and the eye 3a, 3b, and by a suitable design of the layer thicknesses of the interference filter coatings.

[0044] The stereo glasses 10 are characterized by the fact that the interference filters of the lenses 1a, 1b are formed by coating the first and second lenses 1a, 1b. This allows the glasses 10 to be manufactured particularly simply, efficiently, and cost-effectively.

[0045] The coatings of the interference filters of the spectacle lenses 1a, 1b are formed with different layer thicknesses depending on their position on the spectacle lens 1a, 1b, wherein the layer thickness is greater in the edge region of the spectacle lens 1a, 1b than in the central region of the spectacle lens 1a, 1b. In addition to providing the curvature of the spectacle lenses 1a, 1b, the layer thickness of a coating of the spectacle lenses 1a, 1b, which can comprise multiple layers, is also increased towards the edges in order to at least partially compensate for a changed passage length in the event of oblique light incidence and thus for color distortions and image distortions due to the oblique passage through the spectacle lenses 1a, 1b or through the interference filters at the edges of the spectacle lenses 1a, 1b, and thus to enable particularly harmonious color perception with high contrast.

[0046] The layer thicknesses increase steadily from the central area to the edge of the interference filters of the lenses 1a, 1b. These layer thicknesses, which vary evenly depending on the direction of light penetration, make it particularly possible to achieve a uniformly varied penetration length for oblique light incidence, which is accompanied by uniformly different shifts in the transmission bands of the lenses. This allows for a particularly uniform and harmonious reduction of color distortions and image distortions due to the oblique penetration through the lenses 1a, 1b or the interference filters at the edges of the lenses 1a, 1b, thus enabling a particularly harmonious color perception with high contrast.

[0047] In Fig.Figure 3 shows the spectral distribution of the optical transmittance and thus the transmission bands BL,BR,GL,GR,RL,RR and stop bands of the interference filters of the lenses 1a,1b as well as the spectral distribution of the light generated by the light sources for the stereo images of the stereo projection system.

[0048] The light sources are implemented as monochromatic lasers with different wavelengths, of which two lasers emit monochromatic light in the spectral range B1,B2 of the primary color blue or the blue perception range of the eye, two lasers emit monochromatic light in the spectral range G1,G2 of the primary color green or the green perception range of the eye, and two lasers emit monochromatic light in the spectral range R1,R2 of the primary color red or the red perception range of the eye.

[0049] The stereo glasses 10 are characterized by the fact that the bandwidth of the transmission bands BL, BR, GL, GR, RL, RR of a spectacle lens 1a, 1b increases with increasing wavelength. The blue transmission bands BL, BR exhibit an average transmission band bandwidth in the range of 14 nm or 5 nm. The green transmission bands GL, GR exhibit an average transmission band bandwidth in the range of 20 nm or 12 nm. The red transmission bands RL, RR exhibit an average transmission band bandwidth in the range of 25 nm or 15 nm.

[0050] This enables a particularly harmonious color impression with high contrast. Different sensitivities in color perception are compensated for, especially when the light is incident at an angle.

[0051] Furthermore, the stereo glasses 10 are characterized by the fact that the average bandwidths of the transmission band RL, RR in the primary color red are at least 10 nm wider than the average bandwidths of the transmission band BL, BR in the primary color blue. This makes it possible to achieve a particularly harmonious color impression with high contrast. Different sensitivities in color perception are compensated for, especially in the case of oblique light incidence.

[0052] The interference filters of the spectacle lenses 1a, 1b each have spectral transmission bands BL, BR, GL, GR, RL, RR and stop bands, wherein the spectral stop bands of one interference filter of one spectacle lens 1a encompass the transmission bands BR, GR, RR of the other interference filter of the other spectacle lens 1b in the visible frequency range. In addition, each transmission band BL, BR, GL, GR, RL, RR is assigned exactly one spectral range B1, B2, G1, G2, R1, R2 of a single laser of the stereo projection system such that each spectral range B1, B2, G1, G2, R1, R2 is encompassed by a single transmission band BL, BR, GL, GR, RL, RR and is blocked by all other transmission bands BL, BR, GL, GR, RL, RR. This makes it possible to implement a stereo projection system using 3D wavelength division multiplexing (WMT) technology.

[0053] The wearer or user of the Stereo Glasses 10 and the stereo projection system experience a very pleasant and high-quality image, characterized by harmonious color perception and high contrast. Furthermore, reliable image separation of the stereo image data is guaranteed. List of reference symbols 1a left lens, interference filter 1b right lens, interference filter 2a Temple of the spectacle frame 2b Bridge of the spectacle frame 2a Frame of the glasses frame 3a User's eye 3b User's eye 4a Center of the eye 4b Center of the eye 5a Focal point of the left lens 5b Focal point of the right lens 6a Line to the focal point of the left lens 7a Line through the central area of ​​the left lens 8a Line to the center of the left eye 6b Line to the focal point of the right lens 7b Line through the central area of ​​the right lens 8b Line to the center of the right eye 10 stereo glasses d Distance of the lens to the eye B1 Laser Blue Left B2 Laser Blue Right G1 Laser Green Left G2 Laser Green Right R1 Laser Red Left R2 Laser Red Right BL transmission band blue left BR Transmission Band Blue Right GL Transmission Band Green Left GR Transmission band Green Right RL transmission band red left RR Transmission Band Red Right QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 198 08 264 A1

[0006] DE 199 24 167 B4

[0006] DE 100 05 335 C2

[0006] DE 100 57 102 B4

[0006] DE 102 49 815 B4

[0006] DE 103 59 788 B4

[0006] EP 2 399 165 A1

[0006] DE 10 2006 054 713 B4 [0006, 0007]

Claims

[1] Glasses (10) with a first spectacle lens (1a) with a first interference filter and with a second spectacle lens (1b) with a second interference filter with respective spectral transmission bands (BL,BR,GL,GR,RL,RR) and stop bands, characterized by , that the spectacle lenses (1a, 1b) designed as interference filters are designed with at least three transmission bands (BL, BR, GL, GR, RL, RR) with an average bandwidth of less than or equal to 25 nm, wherein at least one transmission band is arranged in the primary colors red, green and blue, that the lenses (1a,1b) are designed as mineral interference filters and that the spectacle lenses (1a,1b) are curved and have a radius of curvature in the range of 100 mm. [2] Glasses (10) according to claim 1, characterized bythat the spectacle lenses (1a,1b) designed as interference filters are designed with at least three transmission bands (BL,BR,GL,GR,RL,RR) with an average bandwidth of less than or equal to 15 nm. [3] Glasses (10) according to claim 1 or 2, characterized by that the glasses are designed as stereo glasses (10) for a stereo projection system operating by means of 3D wavelength division multiplex technology (WMT) and that the spectral stop bands of one interference filter comprise the transmission bands (BL,BR,GL,GR,RL,RR) of the other interference filter in the visible frequency range. [4] Glasses (10) according to one of the preceding claims, characterized by that the lenses (1a,1b) have a radius of curvature between 90 and 120 mm. [5] Glasses (10) according to one of the preceding claims, characterized by that the bandwidth of the transmission bands (BL,BR,GL,GR,RL,RR) of a spectacle lens (1a,1b) increases with increasing wavelength. [6] Glasses (10) according to claim 5, characterized by that the mean bandwidths of the transmission band (RL,RR) in the primary color red are at least 10 nm wider than the mean bandwidths of the transmission band (BL,BR) in the primary color blue. [7] Glasses (10) according to one of the preceding claims, characterized by that the spectacles (10) are designed such that the distance (d) of the spectacle lenses (1a,1b) to the eyeball of the eye (3a,3b) is in the range between 20 and 30 mm. [8] Glasses (10) according to one of the preceding claims, characterized by that the interference filters are formed at least partially by coating the first and second spectacle lenses (1a,1b). [9] Glasses (10) according to claim 8, characterized bythat the coatings of the interference filters of the spectacle lenses (1a,1b) have different layer thicknesses depending on the position on the spectacle lens (1a,1b), wherein the layer thickness in the edge region of the spectacle lens (1a,1b) is greater than in the central region of the spectacle lens (1a,1b). [10] Glasses (10) according to claim 9, characterized by that the layer thicknesses remain the same or increase, in particular increase continuously, from the central area to the edge. [11] Glasses (10) according to one of the preceding claims, characterized by that the spectacle lenses (1a,1b) are held by a frame (2a,2b,2c) which at least partially blocks the incidence of light which does not pass through the spectacle lenses (1a,1b) into the eye (3a,3b) of the user of the spectacles (10). [12] Projection system comprising an image projector or a screen for displaying an image on a screen and spectacles (10) according to one of the preceding claims 1, 2 and 4 to 11, whose spectacle lenses (1a, 1b) correspond in their spectral transmission bands (BL, BR, GL, GR, RL, RR) and stop bands. [13] Stereo projection system comprising a stereo image projector or a stereo screen for displaying a stereo image on a screen by means of 3D wavelength division multiplexing (WMT) technology and stereo glasses (10) according to one of the preceding claims 3 to 11. [14] Projection system according to claim 12 or stereo projection system according to claim 13, characterized bythat the light sources of the image projector or the screen or the stereo image projector or the stereo screen are laser light sources or other very narrow-band light sources, the light of which falls into a transmission band of the spectacle lenses, in particular in the region of the lower edge of a transmission band.

Images