Abstract: Method for designing a progressive ophthalmic lens with a top area between a vision area and a top edge of the lens, and a bottom area between a near vision area and a bottom edge of the lens. Selecting a predesigned lens, lateral aberrations which are redistributed around an outer area, defined according to a frame chosen by the lens user, so that at least on one of intersections between top, bottom and outer areas, the aberrations adopt values higher than those in the predesigned lens.

Abstract: Lens comprising a polymeric substrate, a hardening layer and a metallic layer. Lens comprising a substrate of polymeric material (P), and which is coated with a hardening layer (E) and a metallic layer (M) that is between 1 and 20 nm thick. The coating also has an anti-humidity layer (AH) made of a material from the group made up of ZrO2, Nb2O3, Ta2O5, CeO2, HfO2, La2O3, TiO2, Pr2O3, Sc2O3, WO3, Y2O3, ZnS and the combinations thereof, that is between 35 nm and 55 nm thick, where between the anti-humidity layer (AH) and the hardening layer (E) there is no other sandwiched layer that is thicker than or equivalent to the anti-humidity layer (AH). Over the metallic layer (M) there is a first high refraction index layer (A1), and a first low refraction index layer (B1).

Abstract: A method for designing and manufacturing a monofocal ophthalmic lens and corresponding lens. A surface of the monofocal ophthalmic lens is defined by: f(x,y)=a1+a2?{square root over (1?a3x2?a4y2)}+a5exp{a6x4+a7y4+a8x2y2} where a1-a8 are coefficients, a5 is other than 0 and at least one of a6, a7 and a8 is other than 0, including a hyperbolic component and an exponential component. The coefficients can be calculated by an iterative calculation and the merit function as follows: fm = [ ? i ? ? i ? m i 2 ? ( ? ) ] 1 / 2 where mi is a value of an optical property at a specific viewing angle ? with respect to an optical axis of the lens, and ?i is a weighting value.

Abstract: Procedure for designing a progressive ophthalmic lens and corresponding lens. Procedure for designing a progressive ophthalmic lens, comprising a top area (7) between the far vision area (1) and the top edge of the lens and a bottom area (9) between the near vision area (3) and the bottom edge of the lens, which comprises an optimization stage wherein starting with a predesigned lens the lateral aberrations of the lens are redistributed around an outer area (15), defined according to a frame chosen by the future lens user, so that at least on one of the intersections between top (7) and bottom (9) areas and outer area (15), the aberrations adopt values higher than those they had in the predesigned lens.

Abstract: The invention relates to a method and device for determining the visual behavior of a person. The inventive method comprises the following steps consisting in: recording the movement of the individual's head, recording the movement of his/her eyes, determining the relative orientation of the eye in relation to the head, and determining the amount of time for which the eye is maintained in each orientation. The aforementioned amount of time is determined by collecting the records of orientations in finite intervals and counting the number of records (frequency) in each interval. Said orientations are specified using angular co-ordinates for both the head and the eye. The data are detected and processed with the aid of a device comprising light emitters (51) which are fixed to the head, cameras (63) and a screen (611, 612) for attracting the individual's gaze. The results from the method are used in order to customize the design of a lens for spectacles.

Abstract: Optical device that comprises a spatial light modulator and a spectral filter that normally comprise several parts, such that each part of the filter (V; R; A; L) corresponds to at least one part of the modulator. The spectral filter is superimposed to the spatial light modulator such that the transmittance of each part of the filter is coordinated with the phase offset introduced by the corresponding part of the modulator. In one embodiment, the spatial light modulator is a programmable liquid-crystal device. The invention presents several ways in which to coordinate the transmittance of each part of the spectral filter with the programmed time variation of the phase offset introduced by each part of the spatial light modulator, such that each part of the latter receives light at a spectrally filtered wavelength and focuses it in the same plane.

Abstract: A device to determine the contrast sensitivity of an individual's visual system by means of a series of tests in a measurement session, comprising a means for producing real time digital images, corresponding to modulated visual stimuli; and a display means for presenting said images to an individual's eye, wherein said stimuli may be modulated around an average stimulus in any direction of the color space and may be configured in their spatial and temporal characteristics for each measurement session. Said stimuli are usually chosen in the cardinal directions of the color space and respond to a sinusoidal grid pattern with spatial and temporal modulation, and with a two dimensional gaussian envelope.

Abstract: Method for calculating an ophthalmic lens comprising [a] calculating and constructing a computational model of an initial lens with a given prescription, [b] calculating the three sections of the optical path traveled by rays using the computational model, [c] determining the first surface of a lens equivalent to the initial lens, and [d] calculating the second surface of the equivalent lens by plotting the rays through the equivalent lens and determining their point of intersection with the second equivalent surface. Each ray has an equivalent optical path equal to the initial optical path, or has at least one of the sections of the equivalent optical path equal to the corresponding section of the initial optical path. The equivalent lens thus calculated is the ophthalmic lens that is the object of the invention.

Abstract: Optical device that comprises a spatial light modulator and a spectral filter that normally comprise several parts, such that each part of the filter (V; R; A; L) corresponds to at least one part of the modulator. The spectral filter is superimposed to the spatial light modulator such that the transmittance of each part of the filter is coordinated with the phase offset introduced by the corresponding part of the modulator. In one embodiment, the spatial light modulator is a programmable liquid-crystal device. The invention presents several ways in which to coordinate the transmittance of each part of the spectral filter with the programmed time variation of the phase offset introduced by each part of the spatial light modulator, such that each part of the latter receives light at a spectrally filtered wavelength and focuses it in the same plane.

Abstract: The invention relates to a tool for polishing optical surfaces, comprising a rigid body (10) which is equipped with a polishing face (12) and an elastic sheet (20) which is disposed between the polishing face (12) and the optical surface to be polished. According to the invention, the polishing face (12) of the rigid body (20) takes the form of a portion of a geometric surface which is defined by at Least three parameters. In a preferred embodiment of the invention, the aforementioned surface is atoric. The inventive method consists in selecting the above-mentioned tool from a set of available tools, applying an elastic sheet (20) thereto, polishing at least one optical surface and changing the elastic sheet (20) before polishing other optical surfaces. The original shape is maintained with greater precision in relation to the entire surface to be polished, but particularly close to the edges and/or at the centre thereof.

Abstract: Numeric control bore for boring an eyeglass lens and corresponding method. The bore comprises a bedplate (1), attachment device (3) for the lens (5), rotation device (9) for the lens (5) according to a first axis (7) (first degree of freedom), and a support column (11) with a head (15), wherein the attachment device (3) and the support column (11) can be moved between each other (second degree of freedom). The support column (11) has a first end linked to the bedplate (1) being capable of rotating about a second end (third degree of freedom) and the head (15) is linked to the column (11) by translation structure (fourth degree of freedom). The apparatus only has these four degrees of freedom in order to fix the relative position between the head (15) and the lens (5).

Abstract: The invention relates to a method and device for determining the visual behaviour of a person. The inventive method comprises the following steps consisting in: recording the movement of the individual's head, recording the movement of his/her eyes, determining the relative orientation of the eye in relation to the head, and determining the amount of time for which the eye is maintained in each orientation. The aforementioned amount of time is determined by collecting the records of orientations in finite intervals and counting the number of records (frequency) in each interval. Said orientations are specified using angular co-ordinates for both the head and the eye. The data are detected and processed with the aid of a device comprising light emitters (51) which are fixed to the head, cameras (63) and a screen (611, 612) for attracting the individual's gaze. The results from the method are used in order to customise the design of a lens for spectacles.

Abstract: The apparatus has: a rocking support and an upper clamping member for blocking the lens disc; a first transparent screen provided with reference lines; an image pick-up which obtains images of the lines and images of the disc; an optical system located between the means and the pick-up; an electronic circuitry for processing the images and the modifications in the reference lines caused by inserting the disc between the lines and the pick-up, building a synthetic image; a digital reader for frame forms, in communication with the circuitry; and a second screen for displaying a synthetic image superimposed on the frame data.

Abstract: An apparatus, for reading the groove contour of spectacle frame rims, which includes first and second bearer structures for holding the spectacle frame, a first groove-contour-reading set, a second groove-contour-reading set, and a drive motor. Each of the first and second groove-contour-reading sets includes a first contact member for engaging the groove in one of the spectacle frame rims, a first guide member for guiding the movement of the contact member, and a reading member for reading the movements of the contact means. Further, the apparatus includes a drive motor for simultaneously driving the first and second contact members to thereby simultaneously read the groove contour in the two spectacle frame rims. Because the groove contours are simultaneously read, the apparatus reduces the time necessary to accurately measure the groove contour in each rim of a frame of spectacles.

Abstract: An apparatus and procedure for applying a protective coating to a lens disc; the procedure comprises the positioning of trays (7) carrying lens discs, on a conveyor belt (9), which comes to a halt opposite a sensor means which detects the lenses; the tray (7) enters a coating chamber (4) provided with a coating diffusor (11); and the tray (7) comes to a halt repeatedly leaving one of the lens carried on the tray (7) opposite the diffusor (11); the pulverised coating material is sprayed onto the lens and then the tray (7) passes on to a drying section (3). The apparatus comprises trays (7) carrying lenses; a means for the transport thereof; a chamber (4), provided with a coating diffusor (11) and a gas extraction means (13); there is also a sensor means (15) and a stopping means for regulating the movement of the tray (7) as far as the drying section (3).