JP2024023178A - Method for coloring or decoloring lens, leans capable of being obtained by method for coloring or decoloring leans, colored or decolored leans, lens holder, and coloring device for coloring leans - Google Patents

Abstract

To provide a method for coloring or decoloring a lens, an obtainable lens, a colored or decolored lens, a lens holder, and a coloring device enabling more complicated (gradient) coloring.SOLUTION: A lens can be obtained by a method comprising displacing a geometric center of the lens from a rotational axis of a lens holder or by using the lens holder in which a receiving unit is displaced from the rotational axis. The lens holder rotates at least 360°. A figure a) shows a lens with eccentric halo tinting. A figure b) shows a lens with an inverted eccentric halo. A figure c) shows a pair of lenses with eccentric halo tinting. In a figure d), a halo is only partially applied to the lens.SELECTED DRAWING: Figure 2B

Description

The present invention relates to the coloring of lenses, particularly to the coloring of spectacle lenses. In particular, the invention relates to a method for tinting or bleaching lenses, lenses obtainable by said method, lenses comprising tinting or bleaching, lens holders and lens tintings which are complex in design, in particular eccentric halo and pendulum tintings. This invention relates to a coloring device for producing coloring.

Additionally, the invention relates to a corresponding computer program for implementing the method.

Coloring of eyeglass lenses is desired for both fashion and medical reasons. For sunglasses, solid tinted lenses are most commonly used, but in recent years gradient tinting has become more important as it offers additional benefits. In general, the concept of gradual tinting is to have a full tint on the top of the lens while allowing the user to see with more light or full light in the bottom field of view, thereby allowing for example when driving a car. Provides glare protection and clear vision. The principle of such gradient-tinted glasses is to increase visibility by enlarging the iris due to the upper shading and allowing more light to enter from the real field of view, such as the road or computer. . Similarly, there are lenses on the market that have darker shading toward the bottom and lighter shading toward the top.

The most common way to apply a gradient tint to a lens is by (partially) immersing the lens in a tinting bath and gradually removing it from the bath so that the parts of the lens that are exposed longer to the tinting agent are darker. be.

Despite these benefits of standard gradient tinting, large amounts of glare can still enter the eye in many situations, causing unnecessary eye fatigue and eye strain. This is especially true during demanding visual activities such as watching television, working in front of a display or reading, since light from this peripheral field does not contribute to proper viewing. Quite the contrary, the light causes vision-impairing refraction and reflection in the eye and reduces the opening of the iris, thereby reducing the amount of light that is allowed to enter the eye. This may cause the computer display within the field of view to appear dark, while the ambient light may be perceived as undesirably bright.

In such situations, the linear gradient coloring as described above is supplemented by an annular gradient coloring, but the coloring density of the lens is increased from the center of the lens to the periphery, i.e. not only in one direction but all around the lens. increases with These types of coloring allow all (or nearly all) light to enter from the central field of view while excluding damaging and distracting ambient light from other directions.

US Pat. No. 5,201,955 describes an annular gradient optical lens tinting system. This system reciprocates vertically so that an annular gradient coloration is produced that is darker at the outer edge of each lens and gradually brightens toward the center, while at the same time an axis centered on the lens plane and perpendicular to the lens plane A lens is incorporated into a frame that rotates around the lens, providing for the tinting of spectacle lenses where the optical center of the lens is either completely clear or significantly brighter than the rest of the lens.

However, the variety of eyeglass frames and the various anatomical situations of the customers demand a better fit and therefore a more complex tinting gradient of the lenses. For example, US Pat. No. 5,201,955 does not fit all eyes equally.

The object of the invention is an improved method for tinting or bleaching lenses, an improved lens obtainable by the method, an improved lens including tinting or bleaching, an improved lens holder and an improved tinting. The purpose is to provide equipment. The inventors recognized that it would be desirable to be able to have more complex (gradient) colorations. In particular, it would be advantageous to provide a method, a lens holder and a coloring device that allow (novel) eccentric halo and pendulum lens tinting, in particular asymmetric and/or polychromatic eccentric halo and pendulum lens tinting. Furthermore, it would be advantageous to provide lenses with corresponding halo and/or pendulum tinting or bleaching designs.

To better address one or more of these problems, according to a first aspect of the invention there is provided a first method for tinting or bleaching a lens, the first method by inserting the lens holder into a receiving unit, by providing an immersion bath containing a fluid, by immersing the lens holder in the fluid, and by rotating the lens holder about an axis of rotation up to a predetermined maximum rotation angle. The first method is characterized in that the axis of rotation is external to the lens, and the axis of rotation is generally perpendicular to the plane of the lens. In this case, the axis of rotation does not coincide with the geometric (or optical) center of the lens, i.e. it does not pass through the geometric (or optical) center of the lens, and the lens holder can rotate without restriction, i.e. 360° or less or more than 360°. can be rotated. However, in this case the rotation may be limited to remain below 360° as well. Preferably, it is a rotation axis arranged outside the receiving unit of the lens holder.

Immersing the lens holder in the fluid particularly includes moving the lens holder in a direction perpendicular to the surface of the immersion bath. More particularly, immersing the lens holder in the fluid includes repeatedly moving the lens holder in a direction perpendicular to the surface of the immersion bath.

According to a second aspect of the invention, a second method for tinting or bleaching a lens is provided, the second method comprising inserting the lens into a lens holder and providing an immersion bath containing a fluid. immersing the lens holder in a fluid; and rotating the lens holder about an axis of rotation to a predetermined maximum angle of rotation, the axis of rotation being generally perpendicular to the plane of the lens. The second method includes removing the lens holder from the immersion bath, changing the fluid, displacing the lens in a direction parallel to the plane of the lens relative to the axis of rotation, and displacing the lens ( and immersing the lens holder in the same or another immersion bath.

According to a third aspect of the invention, a third method for tinting or bleaching a lens is provided, the third method comprising inserting the lens into a lens holder and providing an immersion bath containing a fluid. immersing the lens holder in the fluid to a maximum immersion depth; and rotating the lens holder about an axis of rotation to a maximum angle of rotation, the axis of rotation being generally perpendicular to the plane of the lens. and a third method is characterized in that the maximum rotation angle is predetermined and the maximum immersion depth of the lens holder into the immersion bath is adapted according to the predetermined maximum rotation angle or the maximum immersion depth. is predetermined and the maximum rotation angle is adapted according to a predetermined maximum immersion depth of the lens holder into the immersion bath.

According to a fourth aspect of the invention there is provided a lens obtainable by any of the above methods.

According to a fifth aspect of the invention, in a lens comprising a tinting or bleaching, the tinting or bleaching comprises an annular gradient, a partial annular gradient or a pendulum gradient in which the center of the gradient is external to the lens as well as an annular gradient, a partial annular gradient. A lens is provided that includes at least one selected from the group consisting of at least two different gradients, including either an annular gradient or a pendulum gradient. For example, a lens may include two partial annular tintings in two different areas of the lens with two different colors. Similarly, a lens may include two pendulum tintings in different areas on the lens.

Generally, an annular gradient may include a halo or a portion of a halo. Furthermore, the lens may undergo a pendulum-like movement of the lens in the immersion bath, in particular an asymmetric pendulum-like movement of the lens in the immersion bath, i.e. a first angular movement in a first direction and a second direction. may have a pendulum gradient created by movement at to a second angle, the first angle (and the first direction) being different from the second angle (and the second direction). In particular, the coloring or bleaching of the lens provided is not rotationally symmetrical with respect to the geometric center of the lens.

According to another aspect of the invention, a lens holder is provided, the lens holder having a receiving unit configured to hold the lens in a first plane and an axis of rotation generally perpendicular to the first plane. The lens holder is configured to rotate about an axis of rotation, and the lens holder is characterized in that the axis of rotation is external to the lens. In particular, the receiving unit includes a receiving area generally perpendicular to the axis of rotation, the receiving area (the geometric center of which) being displaced from the axis of rotation such that the axis of rotation is external to the lens or even external to the receiving area. configured. Preferably, the axis of rotation is also external to the receiving unit. Additionally, the lens holder may be configured to rotate about an axis of rotation during immersion of the lens holder in the immersion bath.

According to a further aspect, a first tinting device for tinting a lens is provided, the first tinting device comprising a lens holder configured to hold the lens in a first plane. a receiving unit and a rotational axis generally perpendicular to the first plane, the lens holder configured to rotate about the rotational axis, the lens holder characterized in that the rotational axis is external to the lens; an immersion bath containing a fluid, wherein the lens holder is configured to be immersed in the fluid; and a rotation unit configured to rotate.

According to another aspect of the invention, a second coloring device for coloring a lens is provided, the second coloring device comprising a lens holder and an immersion bath containing a fluid, the lens holder having a maximum an immersion bath configured to be immersed in a fluid to an immersion depth; and a rotation unit configured to rotate the lens holder about an axis of rotation up to a maximum angle of rotation and in a direction perpendicular to the surface of the immersion bath. a lift unit configured to move the lens holder, wherein the second tinting device has a predetermined maximum rotation angle, and the lift unit moves the lens into the immersion bath according to the predetermined maximum rotation angle. The maximum immersion depth is configured to adapt a maximum immersion depth of the holder or the maximum immersion depth is predetermined, and the rotation unit adjusts the maximum rotation angle according to the predetermined immersion depth of the lens holder into the immersion bath. characterized in that it is configured to adapt.

According to a further aspect, there is provided a computer program, in particular a non-transitory computer program, comprising program code means, the program code means causing the computer to perform the above-mentioned steps when the computer program is executed on a computer or a processing unit. for controlling the first or second coloring device to carry out any of the steps of the method. The basic idea of the invention is to provide a method for tinting or bleaching lenses that allows a novel movement of the lenses in an immersion bath. In particular, in conventional lens holders, the lens is generally arranged such that its geometric or optical center coincides with the axis of rotation and the lens holder rotates when immersed in an immersion bath. However, such a structure limits the production of lens coloration. The idea is therefore to place the axis of rotation outside the lens. It is also a concept to provide a tinting method that includes at least two tinting cycles, for example to produce lenses with two different colors. A further concept is to adapt the immersion depth of the lens holder into the immersion bath according to the maximum rotation angle or vice versa.

In this way, a wide range of novel non-rotationally symmetric lens tinting (or bleaching) can be obtained. In fact, novel non-rotationally symmetric lens tinting and bleaching can be obtained regardless of the (maximum) rotation angle used. For example, a lens rotating about an axis displaced from the geometric center such that the axis of rotation is external to the lens is rotated in a first direction by a first angle, e.g. 45°, and then rotated in a second direction. For example, it can be rotated by 90° and then rotated again by 90° in the first direction. In other words, the method may involve an asymmetric pendulum-like movement in the immersion bath leading to completely new lens tinting or bleaching.

Another concept is to provide at least two coloring cycles, the parameters of the cycles being different from each other. The concept is, for example, to remove the lens holder from the immersion bath after the first immersion of the lens holder in the immersion bath and to change the fluid before immersing the lens holder in the same or another immersion bath, or to or rotating the lens (e.g., about its own geometric center). In this way, highly complex coloring designs that cannot be produced using conventional coloring methods can be achieved. Such lenses may provide targeted adaptation of the coloration for reasons of aesthetics and control of the amount of light reaching the eye from specific areas of the lens, while at the same time allowing good manufacturability. For example, it is possible to obtain a bicolor lens, especially a bicolor lens in which both colors have different tinting or bleaching patterns on the lens. Naturally, lenses with three or more colors can be obtained as well.

Another concept is to adapt the (maximum) immersion depth of the lens holder into the immersion bath according to a predetermined maximum rotation angle or to adapt the maximum rotation angle according to the (predetermined maximum) immersion depth of the lens holder into the immersion bath. It is to let In this way, novel coloring and bleaching designs can also be achieved. Adapting the (maximum) immersion depth according to a predetermined maximum rotation angle implies that there is a fixed relationship between the maximum rotation angle and the immersion depth. For example, the maximum rotation angle is determined to be 45° in the first direction of rotation, the maximum rotation angle is determined to be 60° in the second direction, and 45° is associated with a maximum immersion depth of 3 cm; If an angle of 60° is associated with a maximum immersion depth of 4 cm, when the lens holder is rotated to the maximum rotation angle in the first direction, the lens holder is immersed to a depth of 3 cm, and when the lens holder is rotated in the second direction When rotated to the maximum rotation angle, the lens holder is immersed to a depth of 4 cm. In other words, the rotation up to a predetermined maximum rotation angle and the simultaneous immersion of the lens holder into the immersion bath follow a predetermined pattern, where the maximum rotation angle is tied to a predetermined (maximum) immersion depth (or vice versa). ). In other words, the (maximum) immersion depth of the lens holder may depend on the (predetermined) maximum rotation angle, and/or the maximum rotation angle may depend on the predetermined (maximum) immersion depth.

In known methods of lens tinting, the immersion into the immersion bath and the rotational movement of the lens holder are completely independent of each other. Therefore, reproduction of lens tinting with the same design is almost impossible to achieve. However, in the present invention, the rotational movement and the vertical movement, ie the dipping movement, are related to each other by a predetermined pattern. In other words, the (maximum) rotation angle (or any rotation angle) of the lens holder is tied to the immersion depth of the lens holder into the immersion bath according to a predetermined pattern. In this way, it is ensured that lenses with the same tinting or bleaching design can be reproduced if the same pattern (tinting or bleaching) is applied in another tinting/bleaching cycle.

The concept therefore extends to conventional lens holders to include a receiving unit that is (or can be) shifted away from the lens holder's axis of rotation to the extent that the axis of rotation is located external to the lens or external to the receiving unit. It is to adapt the For conventional lens holders, the axis of rotation of the lens holder and the geometric (or optical) center of the inserted lens generally coincide. In other words, a conventional lens holder includes a receiving unit that is securely fixed rotationally symmetrically around the axis of rotation of the lens holder. However, this only allows limited types of lens tinting, especially lens tinting that is symmetrical about the geometric (or optical) center of the lens. By providing an axis of rotation external to the lens or external to the receiving unit, it is also possible to color the lens according to other designs, in particular those that are not symmetrical with respect to the center point of the lens.

Preferred embodiments of the invention are defined in the dependent claims. The claimed computer program product has similar and/or identical refinements or preferred embodiments of the claimed method, lens holder or coloring device, as defined in particular in the dependent claims and disclosed herein. It is understood that this is possible.

The following shall briefly explain and define some terms used throughout this application.

The term "lens" can generally be understood as a lens blank, ie a blank from which lenses can be cut out, for example. However, it can equally be understood as a spectacle lens. Nevertheless, the term "lens" may also include other types of lenses of visual aids, such as microscope or telescope lenses. Furthermore, the term "lens" can also include flat glass, and the term "glass" should be understood as any material suitable for lenses. The term "glass" therefore also encompasses plastic glasses. When using flat glass, what is meant in particular is a glass that allows distortion-free imaging. Apart from that, the term "lens" refers to any (curved) transparent material, in particular a shield (preferably suitable for the eye, e.g. wearable on the user's nose), more particularly for example the shield of a helmet or a May include lenses.

The term "axis of rotation" does not necessarily imply a physical axis and can include imaginary axes as well.

The definition of "rotation of less than 360°" may include rotation of less than 360° in one direction or rotation of less than 180° in each of the first and second directions. For example, a rotation of less than 360° may include a rotation of 10° or 359° in one direction. Similarly, a rotation of less than 360 degrees may include a rotation of X degrees in a first direction and a rotation of y degrees in a second direction, respectively, where (x+y) is less than 360 degrees. For example, a rotation of less than 360 degrees may include a rotation of 179 degrees in a first direction and a rotation of 179 degrees in a second direction, respectively.

The term "receiving unit" defines a portion of a lens holder that is specifically configured to receive (and hold) one or more lenses. The receiving unit may include a frame into which one or more lenses can be inserted or a clamp for gripping the lenses. However, any other structure suitable for receiving (and holding) a lens may also be defined as a receiving unit.

The term "receiving area" can generally be understood as a part of the receiving unit, in particular the area or space occupied by the lens when received by the receiving unit. For example, if the receiving unit includes a frame configured to hold a lens, the receiving area may be defined as the area inside the frame, ie the area enclosed by the frame. Similarly, if the receiving unit comprises a rod, in particular a rod comprising a cutout configured to hold a lens, the receiving area is the area surrounded by the rod or more particularly between the rods or between the cutouts of the rod. can be understood as the area the lens occupies when inserted into the

The term "geometric center" may be understood as generally defined, ie as the arithmetic mean position of all points of an object. Another term often used for geometric center is center of mass.

The term "fluid" is to be understood as a substance that continuously deforms under an applied shear stress or external force. In particular, fluids include liquids, gases or plasmas. In particular, the fluid may include a tinting liquid for tinting the lens or a tinting vapor for tinting the lens, tinting to be understood as applying a color and/or a shading to the lens. Similarly, the fluid may include a bleaching liquid for bleaching the lens or a bleaching vapor for bleaching the lens, wherein the bleaching liquid or bleaching vapor, i.e. the bleaching fluid is suitable for removing the color of the lens, in particular Any type of liquid or vapor suitable for bleaching lenses may be defined.

The term "tinted liquid" is to be understood as a liquid containing a coloring agent configured to tint the lens.

The term "bleaching liquid" is to be understood as a liquid containing a bleaching substance configured to bleach the lens.

The term "gradient" is used in particular to describe the intensity distribution of lens tinting or bleaching across the lens surface. In particular, the term "gradient tinting" refers to the shading of a lens in a direction parallel to the lens surface, more specifically a gradual change on the lens, increasing in intensity in a first direction and decreasing in intensity in the opposite direction. Used to describe color intensity. Similarly, the term "gradient bleaching" is used to describe a gradient in bleaching intensity in a direction parallel to the lens surface.

The term "immersion bath" can be understood as a bath of fluid in which the lens holder and therefore the lens can be immersed or immersed. An immersion bath may contain liquid in a tub or tank, for example. The liquid may include a coloring liquid, a bleaching liquid, or any other type of liquid suitable for coloring or bleaching a lens.

The term "servomotor" can be understood as a rotary or linear actuator that allows precise control of angular or linear position, velocity and acceleration. Generally, a servo motor is understood to include a suitable motor coupled to a sensor for position, velocity and/or acceleration feedback.

The term "belt drive" is to be understood as a drive comprising at least one belt and two pulleys, the power being transmitted by the belt between at least two pulleys. In particular, the first pulley is configured to drive a belt, and the belt drives a second pulley. In particular, the pulley may include a shaft. Examples of belts include flat belts, V-belts, and toothed belts.

The term "annular gradient" is to be understood as a gradient extending radially around the center point in a plane passing through the center point. However, the slope does not necessarily have to be the same in all directions. An annular gradient displaced from a particular point shall be understood as an annular gradient with a center point displaced from this particular point. A circular gradient can also be understood as a "circular gradient design". A partial annular gradient is to be understood as part of an annular gradient design.

The term "pendulum gradient" is to be understood as the gradient formed by the pendulum-like movement of the lens during immersion. Depending on whether the tinting or bleaching formed is symmetrical or asymmetrical with respect to the geometric center of the lens, gradients can be classified into "centered pendulum gradients" and "eccentric pendulum gradients."

The term "center of gradient" with respect to annular tinting, partial annular tinting or pendulum tinting refers to the point around which the lens needs to rotate to achieve the desired gradient, i.e. in the lens plane, around which the axis of rotation is located. I want this to be understood as a point.

The term "generally perpendicular to" means "perpendicular to" with a tolerance of +/-10°, preferably +/-5°, more preferably +/-2.5°, even more preferably +/-1°. or "having a 90° angle".

The term "maximum rotation angle" is to be understood as the maximum angle through which the lens holder rotates (before it stops rotating and/or before the direction of rotation changes).

The term "maximum immersion depth" is to be understood as the deepest point of immersion (before holding the lens holder or withdrawing the lens holder upwards from the immersion bath).

In one embodiment of the first method, the first method preferably further comprises displacing the receiving unit from the axis of rotation during immersion. The receiving unit and thus the lens may be displaced continuously or in steps, the step size may range between at least one of 1 mm to 20 mm, especially 2 mm to 15 mm, especially 3 mm to 10 mm, especially 5 mm to 8 mm. . Preferably, the lens is radially displaced from the axis of rotation.

By adjusting the displacement, the asymmetry of lens coloration can be changed. The advantage of this technique, especially when carried out during immersion, is that complex coloring designs can be created in a single coloring cycle, i.e. without the need to remove the lens holder from the immersion bath and/or without having to change the coloring equipment entirely. This is something that can be brought about. Therefore, a variety of completely new lens tintings can be provided. Furthermore, complex lens tinting can be produced faster, cheaper and with less complexity.

In another embodiment of the first method, the lens holder is rotated in the first direction to a first position at a first predetermined angle and/or to a second position at a second predetermined angle. The first predetermined angle is rotated in a second direction, and the first predetermined angle is different from the second predetermined angle. For example, the lens holder may be rotated 45 degrees in a first direction and 90 degrees in a second direction, or rotated 45 degrees in a first direction and 45 degrees in a second direction. obtain.

In another embodiment of the first method, the lens holder is held in a first position for a first time period and is held in a second position for a second time period, the first time period being , different from the second time period. Thus, the intensity of lens tinting or bleaching can vary in different areas of the lens.

In another embodiment of the first method, immersing the lens holder in the fluid includes moving the lens holder in a direction perpendicular to a surface of the immersion bath. Preferably, the speed and distance/depth of moving the lens holder can be adapted. For example, the lens holder can be moved into the immersion bath a first distance, i.e., a first depth, and a second distance, i.e., a second depth, which is also different from the first distance (depth). It can be moved only in the opposite direction, ie in the direction out of the immersion bath.

In preferred embodiments, immersing the lens holder in the fluid includes fully or partially immersing the lens holder in an immersion bath. In particular, the receiving unit/receiving area of the lens holder can be completely or partially immersed in the immersion bath by moving the lens holder. Thus, a lens (or lenses) may be fully or partially immersed in the immersion bath.

In a further preferred embodiment, the first method comprises adapting the maximum immersion depth of the lens holder into the immersion bath according to a predetermined maximum rotation angle of the lens holder.

In another preferred embodiment, the lens holder is moved by a servo motor in a direction perpendicular to the surface of the immersion bath. The use of servo motors supports smooth and constant movement and thus precise tinting or bleaching of lenses.

In a further embodiment, the lens holder is rotated by a belt drive. Therefore, the angular position of the lens can be precisely adapted. This allows precise (angle-dependent) tinting or bleaching of the lens.

In another embodiment of the first method, the fluid comprises a liquid, particularly a coloring liquid comprising a colorant configured to color the lens or a depigmenting liquid configured to decolorize the lens. However, the fluid may likewise include a vapor or a mist, in particular a colored vapor configured to tint the lens or a bleaching vapor configured to bleach the lens.

In a further embodiment, the first method comprises the steps of removing the lens holder from the immersion bath and changing the fluid, displacing the lens (in particular the geometric center of the lens) relative to the axis of rotation or displacing the lens itself. and immersing the lens holder in the same or a different immersion bath. The method may therefore include two or more tinting or bleaching cycles, ie periods of tinting/bleaching the lens or in other words running the tinting device. For example, the coloring liquid used in the first coloring cycle can be changed so that a different color of colorant can be used in the second coloring cycle. Similarly, the lens may be in a first position during a first cycle and may be shifted away from said position before another tinting (or bleaching) cycle.

In one embodiment of the lens, the lens comprises an ophthalmic lens, a flat glass, a monolens or a shield, especially a helmet shield.

In another embodiment of the lens, the lens comprises a polygon, in particular a triangle or a square.

In one embodiment of the lens holder, the receiving unit of the lens holder is configured to be displaced from the axis of rotation in a plane parallel to the first plane, in particular configured to be adjustable, and in more detail is configured to be adjustably displaced by 40 mm. In another embodiment, the receiving unit of the lens holder may be displaced by up to 10 mm, in particular by up to 15 mm, in particular by up to 20 mm, in particular by up to 30 mm, in particular by up to 40 mm. In one embodiment, the receiving unit of the lens holder can be displaced by at least 5 mm, in particular by at least 10 mm, in particular by at least 15 mm, in particular by at least 20 mm. The position of the receiving unit may be adjustable continuously or in steps, the step size ranging between at least one of 1 mm to 20 mm, especially 2 mm to 15 mm, especially 3 mm to 10 mm, especially 5 mm to 8 mm. obtain. Preferably, the receiving unit is configured to be radially displaced from the rotation axis.

By adjusting the amount of shift or displacement, the lens tinting design can be changed, especially if the displacement is carried out during the tinting cycle, ie while the lens is immersed in an immersion bath. To shift, the receiving unit may for example include a shifting element configured to shift within a so-called eccentric area of the lens holder. The advantage of this approach is that complex tinting designs can be produced in a single tinting cycle, ie without having to remove the lens holder from the immersion bath and/or without having to change the tinting equipment entirely. Thus, a variety of entirely novel lens tints can be provided. Furthermore, complex lens tinting can be produced faster, cheaper and with less complexity.

In another embodiment of the lens holder, the receiving unit includes a guide element configured to assist in positioning the lens on the lens holder, and more particularly on the receiving area of the lens holder. The guide element may be, for example, a marker such as a colored dot marking the desired position of the lens. Similarly, the guide element may be a recess or a protrusion in the receiving unit, or it may be a bar configured to be inserted into a cutout in the edge of the lens, by way of example. The guide element allows precise positioning of the lens in the lens holder and thus precise application of tinting or shading.

In a further embodiment, the lens holder includes two opposing plates, the plates being generally parallel to the first plane, and the receiving unit including a connecting element configured to connect the plates. The connecting element can be, for example, a rod or a panel connecting plates. Preferably the plate is a disc. More preferably, the plate includes an eccentric area and the receiving unit includes a shifting element, the shifting element being able to shift within the eccentric area.

In a preferred embodiment, the connecting element includes a recess and/or a protrusion for holding the lens. For example, the connecting element may include a notch or a protruding clamp for gripping the lens. In this way, it can be ensured that the lens is held in a fixed position by the lens holder.

In another embodiment of the lens holder, the receiving unit is configured to hold three or more lenses. In such cases, guide elements that assist in positioning the lens are particularly useful. This is because these guide elements may indicate the desired position and/or orientation of the lens to be tinted. Therefore, a user can easily insert multiple lenses into the lens holder in the same orientation so that multiple lenses can be colored simultaneously in the same way. In particular, this allows precise tinting effects for multiple lenses, ie high precision mass production.

In one embodiment of the first tinting device, the rotation unit rotates the lens holder in a first direction at a first predetermined angle to a first position, and rotates the lens holder to a second position at a second predetermined angle. and is configured to be rotated in the second direction until. Therefore, the rotational movement of the lens holder may be performed asymmetrically. For example, the lens holder may be configured to be rotated by 90° in a first direction and 60° in a second direction.

Preferably, the rotation unit can also be configured to adapt the rotation speed.

In another embodiment of the first tinting device, the rotation unit is configured to hold the lens holder in a first position for a first time period and in a second position for a second time period. and the first time period is different from the second time period. This allows different tinting or bleaching intensities in different areas of the lens, thus allowing completely new tinting or bleaching designs.

In yet another embodiment of the first coloring device, the rotation unit is configured to adapt the predetermined maximum rotation angle of the lens holder according to the immersion depth of the lens holder in the immersion bath.

In a preferred embodiment of the first coloring device, the rotating unit includes a belt drive. The use of a belt drive can stabilize the rotation of the lens holder in the tinting device. However, other types of drive devices are also conceivable.

In another embodiment, the first tinting device further includes a lift unit configured to move the lens holder in a direction perpendicular to the surface of the immersion bath. The lift unit may be belt driven. Preferably, the lift unit is configured to adapt the amount of movement, ie the distance or immersion depth over which the lens holder is moved, as well as the speed of movement. For example, the lift unit may be configured to move the lens holder a first distance into the immersion bath and move the lens holder a second distance in the opposite direction, ie, out of the immersion bath.

In a preferred embodiment of the first tinting device, the lift unit is configured to completely or partially immerse the lens holder in the immersion bath by moving the lens holder. In particular, the lift unit may be configured to completely or partially immerse the receiving area of the lens holder in the immersion bath by moving the lens holder. The lift unit is thus configured to completely or partially immerse the lens (or lenses) held in the receiving area by the receiving unit in the immersion bath.

In yet another embodiment, the lift unit is configured to be driven by a servo motor. Similarly, the rotation unit may also be driven by a servo motor. This ensures smooth and constant linear movement or rotation respectively.

In another embodiment, the lift unit is configured to adapt the maximum immersion depth of the lens holder into the immersion bath according to a predetermined maximum rotation angle of the lens holder. In other words, the lift unit may be configured to adapt the movement of the lens holder depending on the maximum rotation of the lens holder induced by the rotation unit. However, the rotation unit may likewise be configured to adapt the rotation angle of the lens holder in response to the movement of the lens holder guided by the lift unit. For example, if the lens holder is rotated 5 degrees in the first direction, the lift unit will immerse the lens holder completely above the immersion bath such that the lens holder is immersed in the immersion bath by a first immersion depth. It may be configured to move towards a bath. That is, the linear movement induced by the lift unit and the maximum rotational movement induced by the rotation unit can be related to each other.

In yet another embodiment, the coloring device further includes an agitation mechanism configured to agitate the immersion bath. The stirring mechanism ensures that the coloring or decolorizing liquid is evenly distributed in the dipping bath.

Apart from that, the coloring device may further include a heating element configured to heat the immersion bath.

It is to be understood that the features mentioned above and those explained below may not only be used in the respective combinations indicated, but also in other combinations or separately without departing from the scope of the invention.

These and other aspects of the invention will be apparent from and will be explained with reference to the embodiments described below.

1 shows a flowchart of a first embodiment of a method for tinting or bleaching a lens, according to an aspect of the present invention. 1 shows a variety of lenses obtainable using conventional methods for tinting or bleaching lenses; Figure 3 illustrates a first variety of lenses obtainable using a second embodiment of a method according to an aspect of the invention. Figure 3 illustrates a second variety of lenses obtainable using a third embodiment of a method according to an aspect of the invention. Figure 3 shows a pair of lenses obtainable using a fourth embodiment of a method according to an aspect of the invention. 1 shows an embodiment of a lens holder known from the prior art; 6 shows the embodiment of the lens holder of FIG. 5 with a plurality of lenses inserted into the lens holder. 6 shows a schematic view of the lens in the lens holder shown in FIG. 5 after coloring; FIG. 1 illustrates a first embodiment of a lens holder according to one aspect of the present invention. 6 shows a schematic view of the lens in the lens holder shown in FIG. 5 after coloring; FIG. FIG. 6 shows a perspective view of a portion of a second embodiment of a lens holder according to an aspect of the present invention. 1 shows a side view of a first embodiment of a coloring device according to an aspect of the present invention; FIG. Figure 3 shows a schematic diagram illustrating the displacement of the receiving unit with respect to the rotation axis of the lens holder. FIG. 6 shows a perspective view of a second embodiment of a coloring device according to an aspect of the present invention. 3 illustrates a third embodiment of a lens holder according to an aspect of the present invention. FIG. 6 shows a side view of a third embodiment of a coloring device according to an aspect of the present invention. FIG. 7 illustrates an exemplary gear arrangement for precisely controlled angular rotation of a lens holder within a tinting device.

FIG. 1 shows a flowchart of a first embodiment of a method for tinting or bleaching a lens, according to an aspect of the invention. In a first step S202, a lens (or lenses) is inserted into the lens holder. The lens holder may include a conventional lens holder in which the lens is positioned such that the geometric center of the lens coincides with the axis of rotation of the lens holder, or the geometric center of the inserted lens may be shifted away from the axis of rotation. A lens holder according to one aspect of the invention may be used.

In a second step S204, an immersion bath containing a fluid is provided. The fluid may be, for example, a coloring liquid or a bleaching liquid. Since the chronological order of steps S202 and S204 is unrelated, step S204 may be performed before step S202.

In a third step S206, the lens holder is immersed in the fluid of the immersion bath. The lens holder may be fully or partially immersed in the immersion bath.

In step S208, it is determined whether step S210 or step S212 is to be executed as the next step. This determination is based on the lens holder used. More specifically, this determination is based on the placement of the lens in the lens holder. If the rotation axis of the lens holder is outside the receiving unit or outside the lens, ie passes through the receiving area of the lens, step S210 is executed. Step S210 comprises adapting the maximum immersion depth of the lens holder into the immersion bath according to the (predetermined) maximum rotation angle or adapting the maximum rotation angle according to the (predetermined maximum) immersion depth of the lens holder into the immersion bath. Including. However, if it is checked in step S208 that the axis of rotation is outside the lens in the lens holder (or outside the receiving unit), then the lens holder is removed from the depth of immersion of the lens holder in the immersion bath. It can be rotated independently (S212).

Optionally, the method of this embodiment includes step S214, ie, removing the lens holder from the immersion bath, changing the fluid, displacing the lens relative to an axis of rotation, or moving the lens about its own geometric center. further comprising rotating the lens holder in the same or another immersion bath.

FIG. 2A shows a first variety of lenses obtainable using conventional methods for tinting or bleaching lenses. Figure 2A a) shows central halo lens coloration. Figure 2A b) shows a further variant of similar coloring. Figure 2A c) shows a lens with an inverted central halo. These types of tints can be obtained by a method that involves partially immersing the lens in an immersion bath and rotating it at least 360° about an axis passing through the geometric center of the lens and perpendicular to the plane of the lens.

FIG. 2B shows a first variety of lenses obtainable using a second embodiment of a method according to an aspect of the invention. All lenses (more particularly lens tinting) shown in Figure 2B are produced by a method that involves displacing the geometric center of the lens from the axis of rotation of the lens holder or by using a lens holder in which the receiving unit is displaced from the axis of rotation. It can be obtained by The lens holder rotates at least 360 degrees. Figure 2B a) shows a lens with eccentric halo tinting. This type of tinting can be achieved if the lens, especially the geometric center of the lens, is located away from the axis of rotation of the lens holder. Furthermore, the axis of rotation can be arranged such that it lies in a parallel plane above the surface of the immersion bath, ie outside the immersion bath containing the colorant. In that case, if the lens holder rotates around the axis of rotation, the colored design shown in a) of FIG. 2B is obtained. Figure 2B b) shows a lens with an inverted eccentric halo. The method used can be the same as that of the lens shown in Figure 2B a), the only difference is that the axis of rotation should be in parallel planes, but below the surface of the immersion bath, i.e. It should be inside the bath.

Figure 2B c) shows a pair of lenses with eccentric halo tinting. The position of the halo can be precised by fixing the lens in the lens holder to a predefined position, especially at a predefined distance from the axis of rotation of the lens holder and at a predefined angular position with respect to the geometric center of the lens. can be adjusted to Figure 2B d) shows another pair of lenses with eccentric halos. However, in Figure 2B d) the halo is only partially applied to the lens. In particular, Figure 2B d) shows lens coloration where the gradient center is outside the lens but close to the edge of the lens. In other words, to achieve the lens shown in Figure 2B d), the axis of rotation needs to be outside the lens. Different harrow sizes can be obtained by adapting the immersion depth into the immersion bath and by displacing the rotation axis.

FIG. 3 illustrates a second variety of lenses obtainable using a method according to an aspect of the invention. Figure 3 a) shows a lens with a tinting called "central single pendulum". This type of coloration can be obtained if the axis of rotation of the lens holder is located above the surface of the immersion bath, ie in a parallel plane outside the immersion bath, and if the lens holder is rotated by about 90° in both directions. Figure 3b) shows a lens with a tinting called "central dual pendulum". This type of tinting can be achieved in the same way as the tinting shown in Figure 3a), but the lens is rotated 180° in the lens plane between tinting cycles. Similarly, the coloring shown in FIG. If rotated by a degree, it can be achieved. Figure 3 d) shows the "center rectangle pendulum" coloring. This type of tinting can be achieved if the tinted lens is rotated 90° in the immersion bath 104 before another tinting cycle, as shown in FIG. 3a). The lens tinting shown in FIGS. 3b), 3c) and 3d) can therefore be achieved by an embodiment of the second method according to the invention. Figure 3e) shows "surplus pendulum coloring" as a further example of tailored coloring that can be provided by controlling the immersion depth based on angular rotation. Said lens tinting can be achieved by an embodiment of the third method disclosed herein.

FIG. 4 illustrates a pair of lenses obtainable using another embodiment of the second method according to an aspect of the invention. In this embodiment, the geometric center of the lens is shifted away from the axis of rotation of the lens holder. Furthermore, in the first tinting cycle, the lens holder rotates at least 360°, and in the second cycle, the rotation of the lens holder is limited to less than 360°. More particularly, the lens holder rotates less than 180° in a first direction and rotates less than 180° in a second direction. The receiving unit is eccentric to obtain the coloring shown in FIG. 4 and the holder rotates like a pendulum, so the coloring shown in FIG. 4 is called an "eccentric pendulum harrow".

FIG. 5 shows a conventional lens holder 10 configured to color multiple lenses simultaneously. Lens holder 10 includes two opposing plates 14a and 14b connected by three rods 24a, 24b and 24c. The three rods 24a, 24b and 24c include a plurality of notches 28. A lens 50 to be colored can be inserted into a cutout in the rod and fastened by a bar 26 insertable between plates 12a and 12b. The bar 26 is configured to apply a force to the lens located in the notch, and in particular is configured to force the lens to remain within the notch 28 of the rod. The three rods 24a, 24b and 24c and the bar therefore form the receiving unit 20.

On the side of the plate facing away from the rods and bars, plates 14a and 14b each include a shaft 12a and 12b, respectively. Lens holder 10 may rotate about an (imaginary) axis of rotation 60 extending through shafts 12a and 12b. Typically, shafts 12a and 12b are located at the geometric centers of plates 14a and 14b. Receiving unit 20 is typically arranged such that the geometric center of lens 50 held by receiving unit 20 is located on axis of rotation 60 . Therefore, when the lens holder 10 is rotated about the rotation axis 60, the lens 50 inserted into the lens holder is rotated about the geometric center.

FIG. 6 shows the conventional lens holder 10 of FIG. 5 with a lens 50 inserted into the receiving unit 20. As can be seen, lens 50 is gripped between rods 24a, 24b, and 24c and bar 26. In particular, the lens is secured by a cutout 28 in the rod, thereby preventing shifting of the lens.

7A and 7B show schematic views of the lens in the lens holder 10 shown in FIG. 6 after coloring. In particular, FIG. 7A shows a front view of lens 50 inserted into lens holder 10, which includes three rods 24a, 24b and 24c and bar 26. FIG. The lens 50 is tinted by a tinting procedure in which the lens holder 10 (and thus the lens 50) is rotated at least 360° (or multiples of 360°) about an axis of rotation 60 while being immersed in an immersion bath at various depths. can be achieved. In practice, such so-called central halo tinted lenses use a rotating lens holder 10 that reciprocates in the immersion bath such that the axis of rotation 60 remains below the surface of the immersion bath throughout the tinting procedure. It can be generated by The coloring of the lens shown in FIG. 7A is "inverted center halo coloring."

FIG. 7B shows a front view of lens 50 inserted into lens holder 10, which includes three rods 24a, 24b and 24c and bar 26. FIG. The lenses are colored using so-called central halo tinting. This type of coloring can be achieved by using lenses with solid coloring in the coloring procedure with respect to FIG. 7A, where the immersion bath contains a decolorizing solution instead of coloring. However, the same kind of coloring can be achieved by using a colorant in the immersion bath while the lens holder rotation axis 60 remains above the direction of the immersion bath throughout the coloring procedure.

FIG. 8 shows a first embodiment of a lens holder 10 according to one aspect of the invention. Lens holder 10 includes two opposing plates 14a and 14b connected by three rods 24a, 24b and 24c. The three rods 24a, 24b and 24c include a plurality of notches 28. A lens 50 to be tinted can be inserted into a notch in the rod and secured by a bar 26, which is configured to apply a force to the inserted lens and to remain within the notch 28 in the rod. Force the lens to Lens holder 10 further includes two shafts 12a and 12b outside each of plates 14a and 14b. The shafts 12a and 12b are configured to be inserted into the shaft receivers of the tinting device, thereby allowing the lens holder 10 to rotate about an axis of rotation 60 extending through the shafts 12a and 12b. In contrast to the conventional lens holder shown in FIGS. 5 and 6, the lens holder 10 of the present invention includes a receiving unit 20 that is shifted away from the axis of rotation 60. In contrast to the conventional lens holder shown in FIGS. In particular, the geometric center of the receiving area of the lens is displaced relative to the axis of rotation 60. More precisely, the axis of rotation of the lens holder is arranged outside the lens (and also outside the receiving part).

9A and 9B show schematic views of the lens 50 in the lens holder 10 shown in FIG. 8 after coloring. In particular, FIG. 9A shows a front view of lens 50 inserted into lens holder 10, which includes three rods 24a, 24b and 24c and bar 26. FIG. The coloring of the lens 50 in FIG. 9A reflects so-called inverted eccentric halo coloring, where the center of the gradient is outside the lens but close to the edge of the lens. For example, as shown in FIG. 8, a lens 50 having a solid color is inserted into the lens holder 10, and the lens holder 10 (and the lens ) can be partially immersed in an immersion bath containing a decolorizing solution to achieve inverted eccentric halo coloration. A gradual shading of the tint can be achieved if the lens holder 10 moves (slightly) up and down relative to the immersion surface (indicated by dashed lines) while the lens holder 10 is rotating.

FIG. 9B also shows a front view of lens 50 inserted into lens holder 10, which includes three rods 24a, 24b and 24c and bar 26. FIG. The coloring of the lens 50 shown is eccentric halo coloring, which is achieved by the coloring procedure applied to the lens shown in FIG. 9B, except that the lens 50 is exposed to a colored liquid instead of a bleaching liquid. Can be done.

FIG. 10 shows a perspective view of a portion of a second embodiment of a lens holder according to an aspect of the present invention. In particular, FIG. 10 shows a receiving unit comprising three rods 24a, 24b and 24c and a bar 26, the three rods and bar being connected to a shifting element 84. In this embodiment, shift element 84 includes a ring. Rods 24a, 24b and 24c include cutouts into which lenses 50 are inserted. Lens 50 is further prevented from falling out of the receiving unit by bar 26. The fixed position is ensured by a guide element 15, in this embodiment a stick, extending through a cutout on the edge of the lens. The ring is placed so that its plane is perpendicular to the rod. In other words, the plane of the ring is configured to be parallel to the plane of the lens. The shifting element 84 (or ring) is configured to be inserted into the eccentric space 82 of the plate 14 of the lens holder.

In this embodiment, the shifting element 84 is configured to shift in the eccentric space 84. In particular, the plate may include a scale that indicates the amount of shift (ie, displacement) of the lens holder from the axis of rotation. For example, if the marker on the ring points to "0" on the scale, this means that the receiving unit is positioned such that the center of rotation of the lens holder passes through the geometric center of the receiving area surrounded by the rods and bars (and therefore the lens). It can be shown that On the other hand, for example, if the marker points to "10", this indicates a shift of 10 mm from the center, ie, a shift of the geometric center of the lens by 10 mm from the axis of rotation. Similarly, the receiving unit may rotate in eccentric space 84 about an axis passing through the receiving area (and thus the lens). The amount of rotation can also be indicated on a scale.

The lens holder may further include a fixing element, such as a screw, configured to fix the shifting element 84 in the eccentric space 82 of the lens holder. In this embodiment, eccentric space 82 includes a recess in plate 14 . However, other types of eccentric spaces are also conceivable. For example, the eccentric space can be defined by a rail or the like on which the shift element 84 can move.

FIG. 11 shows a side view of a first embodiment of a second coloring device 100 according to an aspect of the invention. In fact, only part of the coloring device 100 is visible in FIG. In particular, plate 14a of lens holder 10 and shaft 12a on plate 14a are shown. The shaft 12a of the lens holder 10 is inserted into the receiving element of the tinting device 100. With this structure, the lens holder 10 can be stably rotated by driving the shaft.

FIG. 12 shows a schematic diagram showing the displacement of the receiving unit 20 with respect to the rotation axis of the lens holder. In this figure, the shifting element 84 is represented by a ring, and the receiving area 21 of the receiving unit, reflecting the position of the lens 50, is shown by a circle surrounded by a dashed line. FIG. 12 shows in particular the displacement of the geometric center 80 of the receiving area 21 of the lens holder (and thus the lens) with respect to the axis of rotation 60, which is shown to amount to 5 mm in total. In particular, an eccentric space 82 is shown which represents the space in which the receiving unit 20 can move around. As can be seen and is also indicated by the scale shown, the geometrical center 80 of the receiving unit 20 and thus of the lens is in particular arranged in such a way that the axis of rotation no longer passes through the receiving area of the lens holder, i.e. the axis of rotation is outside the receiving area. It is possible to shift further away from the axis of rotation 60 such that the shift element 84 is shifted to the lowest possible position. However, the receiving unit 20 can likewise be shifted back to a position where the geometric center 80 and the axis of rotation 60 coincide.

FIG. 13 shows a perspective view of another embodiment of a second tinting device 100 for tinting a lens 50, according to an aspect of the present invention. The coloring device 100 includes a lens holder 10, an immersion bath 104, and a rotation unit 102. Lens holder 10 includes two opposing plates 14a and 14b connected by a rod 24 and a bar 26. To hold the lens 50 in a fixed position, the rod includes a cutout for receiving the lens, and the bar ensures that the lens remains fixed in the lens holder. The rod of lens holder 10 in this embodiment includes multiple cutouts to allow multiple lenses to be held in the receiving area of lens holder 10. Lens holder 10 further includes shafts 12a and 12b configured to be inserted into receiving element 106 of tinting device 100. Accordingly, the lens holder 10 can rotate around an (imaginary) axis of rotation 60 connecting the shafts 12a and 12b. In practice, a rotation unit 102 in the coloring device 100 is provided which includes a belt drive 107 configured to rotate the shaft 12a and thus rotate the lens holder 10 about the axis of rotation 60.

Rod 24 and bar 26 are connected at their ends to a shift element 84, which is connected to plates 14a and 14b, respectively. In particular, the shifting elements can move within eccentric spaces 82, or recesses, in each of plates 14a and 14b. The receiving unit can thus be shifted along the surfaces of plates 14a and 14b relative to the point where the (imaginary) axis of rotation 60 passes through plates 14a and 14b, respectively.

In the embodiment shown in FIG. 13, the coloring device 100 further includes a lift unit 108 configured to move the lens holder 10 in a direction perpendicular to the surface of the immersion bath. The lift unit 108 may move the lens holder towards the bottom of the immersion bath in the same direction and/or in the opposite direction. Lift unit 108 is therefore configured to adjust the depth of immersion into immersion bath 104. In particular, the lift unit 108 may move the lens holder 10 while the rotation unit 102 rotates the lens holder 10. In this embodiment, the lens holder 10 may rotate about the rotation axis 60 in a first direction to a first maximum angle while being immersed in the immersion bath to a first depth by the lift unit 108. The lens holder 10 can then be raised so that it is no longer immersed in the immersion bath. In a next step, the lens holder may be rotated by the rotation unit 102 to a second maximum angle in a second direction about the rotation axis 60 while being immersed in the immersion bath to a second depth by the lift unit 108 .

By adjusting the depth of immersion of the lens into the immersion bath 104 and by adjusting the angle of rotation in the two directions of rotation, a wide range of individual lens tints can be produced. This still applies if the coloring is changed during the coloring process, ie between coloring cycles, for example by changing the color of the coloring. Furthermore, instead of using a coloring agent in the immersion bath, a bleaching liquid can be used, thereby creating a novel bleaching effect. The tinting apparatus 100 can be used, for example, to make a lens having an eccentric halo tinting in a first position and an inverted eccentric halo in a second position.

In this embodiment, the lift unit 108 can be driven by a servo motor 110. The use of such a motor ensures smooth movement of the lens holder 10 and thus precise tinting of the lens.

FIG. 14 shows another embodiment of a lens holder 10 according to an aspect of the invention. In this embodiment, the lens holder 10 is configured to hold a plurality of lenses, particularly more than 160 lenses. Lens holder 10 includes a rack 16 that is inserted into coloring device 100 . Rack 16 includes 16 sub-holders arranged in two rows. Each sub-holder includes two rods containing cutouts for receiving and securing a plurality of lenses 50, particularly more than ten lenses.

FIG. 15 illustrates a side view of an embodiment of a coloring device 100 according to an aspect of the present invention. The coloring device 100 includes three lens holders 10a, 10b and 10c partially immersed in the immersion bath 104 of the coloring device 100. A plurality of lenses 50 to be colored are inserted into the lens holder 10c.

FIG. 16 shows an exemplary gear arrangement for precisely controlled angular rotation of a lens holder within a tinting device. Conventional coloring devices do not require such precise angle control. In particular, the inventors have proposed that the lens holder 10 be moved around the axis of rotation in the context of a lift unit 108 configured to adapt the immersion depth of the lens holder 10 in the immersion bath 104 according to the angle of rotation of the lens holder 10. It has been recognized that by providing a tinting device that includes a lens holder with a gear arrangement adapted to rotate, precise control of angular rotation can be provided. In particular, spur gears provide precise control of angular rotation.

While the invention has been illustrated and described in detail in the drawings and foregoing description, such drawings and description are to be regarded as illustrative or illustrative and not as limiting; It is not limited to the disclosed embodiments. From a study of the drawings, this disclosure, and the appended claims, those skilled in the art will understand and understand other variations of the disclosed embodiments in practicing the claimed invention. be able to.

In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. A single element or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

The computer program may be stored/distributed in a suitable medium such as an optical storage medium or a solid state medium provided together with or as part of other hardware, but not connected to the Internet or other wired or wireless It may be distributed in other forms, such as via telecommunications systems.

Any reference signs in the claims shall not be construed as limiting the scope.

Claims (36)

A first method for tinting or bleaching a lens, the method comprising:
- inserting the lens into the receiving unit of the lens holder;
- providing an immersion bath containing a fluid;
- immersing the lens holder in the fluid;
- rotating the lens holder about an axis of rotation to a predetermined maximum angle of rotation, the axis of rotation being generally perpendicular to the plane of the lens; A first method characterized in that the rotation axis is external to the lens. A first method according to claim 1, characterized in that it preferably further comprises displacing the receiving unit from the axis of rotation during immersion. The lens holder is rotated in a first direction at a first predetermined angle to a first position, and rotated in a second direction at a second predetermined angle to a second position, The first method according to claim 1 or 2, characterized in that the predetermined angle is different from the second predetermined angle. The lens holder is held in the first position for a first time period and in the second position for a second time period, the first time period being the second time period. The first method according to any one of claims 1 to 3, characterized in that: 5. The method according to claim 1, wherein immersing the lens holder in the fluid includes moving the lens holder in a direction perpendicular to the surface of the immersion bath. Method. 6. The method according to claim 1, wherein immersing the lens holder in the fluid comprises completely or partially immersing the lens holder in the immersion bath. First method. 7. According to one of claims 1 to 6, further comprising adapting the maximum immersion depth of the lens holder in the immersion bath according to the predetermined maximum rotation angle of the lens holder. The first method. A first method according to any one of claims 5 to 7, characterized in that the lens holder is moved in the direction perpendicular to the surface of the immersion bath by a servo motor. A first method according to any one of claims 1 to 8, characterized in that the lens holder is rotated by a belt drive. 10. The fluid according to claims 1 to 9, characterized in that the fluid comprises a liquid, in particular a coloring liquid comprising a coloring agent configured to color the lens or a bleaching liquid configured to bleach the lens. The first method according to any one of the items. - removing the lens holder from the immersion bath;
- either changing the fluid, displacing the lens relative to the axis of rotation or rotating the lens about its own geometric center;
- immersing the lens holder in the same or another immersion bath. A first method according to any one of claims 1 to 11, characterized in that the lens comprises a flat glass, a monolens or a shield, in particular a helmet shield. A first method according to any one of claims 1 to 12, characterized in that the lens comprises a polygon, in particular a triangle or a square. A second method for tinting or bleaching lenses, the method comprising:
- inserting the lens into the lens holder;
- providing an immersion bath containing a fluid;
- immersing the lens holder in the fluid;
- rotating the lens holder about an axis of rotation to a predetermined maximum angle of rotation, the axis of rotation being generally perpendicular to the plane of the lens;
- removing the lens holder from the immersion bath;
- changing the fluid, displacing the lens in a direction parallel to the plane of the lens with respect to the axis of rotation, and rotating the lens;
- immersing the lens holder in the same or another immersion bath. A third method for tinting or bleaching lenses, the method comprising:
- inserting the lens into the lens holder;
- providing an immersion bath containing a fluid;
- immersing the lens holder in the fluid to a maximum immersion depth;
- rotating the lens holder about an axis of rotation to a maximum angle of rotation, the axis of rotation being generally perpendicular to a plane of the lens; a rotation angle is predetermined, and the maximum immersion depth of the lens holder in the immersion bath is adapted according to the predetermined maximum rotation angle, or the maximum immersion depth is predetermined. and the maximum rotation angle is adapted according to the predetermined maximum immersion depth of the lens holder into the immersion bath. Lens obtainable by any of the methods according to any one of claims 1 to 14 or 15, respectively. In a lens that includes tinting or bleaching, the tinting or bleaching is a circular gradient, a partial circular gradient, or a pendulum gradient in which the center of the gradient is outside the lens, as well as a circular gradient, a partial circular gradient, and a pendulum gradient. A lens comprising at least one selected from the group consisting of at least two different gradients. Lens according to claim 16 or 17, characterized in that it comprises an ophthalmic lens, a flat glass, a monolens or a shield, in particular a helmet shield. Lens according to any one of claims 16 to 18, characterized in that it comprises a polygonal shape, in particular a triangular or square shape. A lens holder (10),
- a receiving unit (20) configured to hold the lens (50) in a first plane;
- an axis of rotation (60) generally perpendicular to the first plane, and a lens holder (10) configured to rotate about the axis of rotation (60), the axis of rotation (60) comprising: A lens holder (10), characterized in that it is located outside the lens (50). The receiving unit (20) is configured to be displaced from the rotation axis (60) in a plane parallel to the first plane, in particular configured to be adjustable and more particularly Lens holder (10) according to claim 19, characterized in that it is configured to be adjustably displaced by 40 mm. According to claim 20 or 21, the receiving unit (20) comprises a guide element (15) configured to assist in positioning the lens (10) in the lens holder (10). Lens holder (10) as described. comprising two opposing plates (14a, 14b), said plates (14a, 14b) being generally parallel to said first plane, said receiving unit (20) connecting said plates (14a, 14b); Lens holder (10) according to any one of claims 20 to 22, characterized in that it comprises a connecting element (24a, 24b, 24c) configured to do so. Lens holder (10) according to claim 23, characterized in that the connecting element (24a, 24b, 24c) comprises a recess (28) and/or a projection for holding the lens (10). Lens holder (10) according to any one of claims 20 to 24, characterized in that the receiving unit (20) is configured to hold three or more lenses (50). A first coloring device (100) for coloring a lens (50), comprising:
- a lens holder (10) according to any one of claims 19 to 24;
- an immersion bath (104) containing a fluid, wherein the lens holder (10) is configured to be immersed in the fluid;
- a rotation unit (102) configured to rotate the lens holder (10) about the rotation axis (60) of the lens holder (10) up to a predetermined maximum rotation angle; (100). The rotation unit (102) rotates the lens holder (10) in a first direction at a first predetermined angle to a first position, and rotates the lens holder (10) in a second direction at a second predetermined angle to a second position. 27. A first coloring device (100) according to claim 26, characterized in that it is arranged for rotation in the direction of , and the first predetermined angle is different from the second predetermined angle. the rotation unit (102) is configured to hold the lens holder (10) in the first position for a first time period and in the second position for a second time period; 28. A first coloring device (100) according to claim 27, characterized in that said first time period is different from said second time period. Claim characterized in that the rotation unit (102) is configured to adapt the predetermined maximum rotation angle of the lens holder (10) according to the immersion depth of the lens holder in the immersion bath. The first coloring device (100) according to any one of items 26 to 28. A first coloring device (100) according to claim 26 or 29, characterized in that the rotation unit (102) comprises a belt drive (107). Any one of claims 26 to 30, characterized in that it further comprises a lift unit (108) configured to move the lens holder (10) in a direction perpendicular to the surface of the immersion bath (104). 1. The first coloring device (100) according to paragraph 1. The lift unit (108) is configured to completely or partially immerse the lens holder (10) in the immersion bath (104) by moving the lens holder (10). A first coloring device (100) according to claim 31. A first coloring device (100) according to claim 31 or 32, characterized in that the lift unit (108) is configured to be driven by a servo motor (110). The lift unit (108) is configured to adapt the maximum immersion depth of the lens holder (10) into the immersion bath (104) according to the predetermined maximum rotation angle of the lens holder (10). A first coloring device (100) according to any one of claims 31 to 33, characterized in that: A second coloring device (100) for coloring a lens (50), comprising:
- a lens holder (10);
- an immersion bath (104) containing a fluid to a maximum immersion depth, wherein the lens holder (10) is configured to be immersed in the fluid;
- a rotation unit (102) configured to rotate said lens holder (10) about a rotation axis (60) up to a maximum rotation angle;
- a second tinting device (100) comprising a lift unit (108) configured to move the lens holder (10) in a direction perpendicular to the surface of the immersion bath (104); is predetermined, and the lift unit (108) is configured to adapt the maximum immersion depth of the lens holder (10) into the immersion bath according to the predetermined maximum rotation angle. or the maximum immersion depth is predetermined, and the rotation unit (102) adapts the maximum rotation angle according to the predetermined immersion depth of the lens holder (10) into the immersion bath. A second coloring device (100), characterized in that it is configured to. 15. A computer program, in particular a non-transitory computer program, comprising program code means, wherein the program code means are configured to provide information to a computer, in particular a non-transitory computer program, when the computer program is executed on a computer or a processing unit, respectively. A first coloring device according to any one of claims 26 to 34 or a second coloring device according to claim 35, for carrying out any step of the method according to any one of claims 26 to 34. A computer program, especially a non-transitory computer program, for controlling the