Abstract: A method of preparing an ophthalmic lens for mounting in a surround of an eyeglass frame, the surround presenting a generally profiled shape with an inside face provided with a first engagement ridge or groove and lying between a rear margin for being turned towards the face of the wearer of the eyeglass frame and an opposite front margin, the method including: acquiring the three-dimensional shape of an acquired longitudinal profile running along the inside face; and shaping the ophthalmic lens so as to form on its edge face a second engagement ridge or groove extending along a deduced longitudinal profile of three-dimensional shape calculated as a function of the shape of the acquired longitudinal profile. The method further includes acquiring a geometrical characteristic that relates to the position of the engagement ridge or groove relative to the front and/or rear margin of the frame, the shape of the deduced longitudinal profile then also being calculated as a function of the geometrical characteristic.

Abstract: A device for automatically measuring characteristics of an ophthalmic lens (L1), includes: a support (2) designed to receive such a lens; on one first side of the lens support, illuminating elements (208) including an optical system for producing a light beam directed towards the ophthalmic lens mounted on the support; and on a second side of the support, elements for analyzing (210) the image transmitted by the ophthalmic lens mounted on the support and illuminated by the illuminating elements (208); elements for splitting the light beam including a first mask (220) forming a Hartmann array and arranged on the first side of the lens support to be illuminated, upstream of the lens by the light beam.

Abstract: Device (100) for automatically detecting various characteristics of an ophthalmic lens (10), the device includes a support (110) adapted to receive the lens. The support is displaceable in translation along two mutually perpendicular axes, and include elements for forming a positioning image on first acquisition and analysis elements.

Abstract: The device includes receiver elements (121, 114) for receiving the ophthalmic lens; on either side of the receiver elements, firstly lighting elements (S) for illuminating the ophthalmic lens (103) installed on the receiver elements, and secondly acquisition elements (122, 125, C) for acquiring the shadow of the ophthalmic lens illuminated by the lighting elements (S); measurement elements (S, 124, C) suitable for measuring the optical deflection power exerted by the ophthalmic lens on at least one light ray and for delivering a signal representative of the deflection power; and an electronic and computer system including geometrical correction calculation instructions for deducing from the measured deflection power a corrected shape for at least a portion of the shadow of the ophthalmic lens as perceived by the acquisition elements (122, 125, C)

Abstract: Method of manually centering an ophthalmic lens, includes: a) acquiring and storing the shadow of a predetermined geometrical figure formed on a transparent support interposed between lighting and acquisition elements while the support is illuminated; b) superposing the lens and support; c) acquiring and storing the detected by the lens while the latter and support are illuminated; d) using the acquisition elements to acquire the shadow of the center and/or axis marking of the lens; e) displaying firstly the shadow of the center and/or axis marking, and secondly a virtual centering target corresponding to the position desired for the center marking relative to a reference point of the rim of the frame; f) deducing a corrected relative position for the reference point of the frame rim relative to the center marking, or vice versa; and g) putting the shadow of the centering marking of the lens manually into coincidence with the centering virtual target.

Abstract: A device (100) enabling automatic detection of the index marks of an ophthalmic lens (10), includes a support (110) which is adapted in such a way as to receive the lens, and, on each side of the support, first elements (120) for the illumination of the ophthalmic lens installed on the support, and first elements (130) for analysis and acquisition of the light transmitted by the lens. The device also includes an activatable and deactivatable pattern filter (140) arranged between the first illuminating elements and the support.

Abstract: An ophthalmic diagnostic apparatus, includes a first body (6), for viewing from a given position (4) and a second body (7, 8), for viewing from the position (4), each embodied for display of ophthalmic test patterns, the second body (7, 8) for viewing, being arranged between the first body (6) for viewing and the given position (4). The apparatus further includes a control module (5) for the first and second bodies for viewing, embodied for arranging the bodies in a first configuration in which the second body (7, 8) for viewing is in a condition giving symbols and the first body (6) for viewing is in a plain condition and a second configuration in which the second body (7, 8) for viewing is in a transparent condition and the first body (6) for viewing is in a condition giving symbols.

Abstract: A method of verifying at least one centering characteristic of an ophthalmic lens provided with markings and mounted on a frame, the method includes: a) positioning the ophthalmic lens on a support placed facing a pattern filter; b) using a diffuse light source to illuminate the ophthalmic lens through the pattern filter; c) using a digital camera to pick up the light transmitted by the ophthalmic lens; d) processing the signal output by the digital camera to determine the positions of the markings of the ophthalmic lens in a stationary frame of reference; e) determining the position of the support in the stationary frame of reference; and f) deducing the value of the centering characteristic from the known position of the support and from the positions of the permanent markings of the ophthalmic lens.

Abstract: The measurement apparatus includes: a support arranged to receive a lens; lighting element including an optical system for generating a collimated light beam directed towards the lens under measurement installed on the support; detachment elements for detaching light rays from the light beam, for detaching a localized group of at least three non-coplanar light rays grouped together about a measurement axis in a measurement cylinder of section substantially smaller than the section of the lens under measurement; acquisition elements for identifying the deflections imparted by the lens on the detached light rays and for delivering a signal representative of the deflections; and an electronic and computer system programmed to deduce from said deflections the value of the refractive characteristic of the lens at the measurement point.

Abstract: A device for automatically measuring characteristics of an ophthalmic lens (L1), includes: a support (2) designed to receive such a lens; on one first side of the lens support, illuminating elements (208) including an optical system for producing a light beam directed towards the ophthalmic lens mounted on the support; and on a second side of the support, elements for analyzing (210) the image transmitted by the ophthalmic lens mounted on the support and illuminated by the illuminating elements (208); elements for splitting the light beam including a first mask (220) forming a Hartmann array and arranged on the first side of the lens support to be illuminated, upstream of the lens by the light beam.

Abstract: A method includes a step of contactless optical measurement of the local value of at least one refringence optical characteristic of the lens over defined local zone around the measurement point of the lens, and at least one step of determining the axial position of the measurement point on one of the faces of the lens; the axial position of the measurement point obtained is compared with the local value of the optical characteristic of the lens at the measurement point as determined from the contactless optical measurement, in order to deduce therefrom at least one vertex optical power of the lens at the measurement point.

Abstract: Method of manually centering an ophthalmic lens, includes: a) acquiring and storing the shadow of a predetermined geometrical figure formed on a transparent support interposed between lighting and acquisition elements while the support is illuminated; b) superposing the lens and support; c) acquiring and storing the detected by the lens while the latter and support are illuminated; d) using the acquisition elements to acquire the shadow of the center and/or axis marking of the lens; e) displaying firstly the shadow of the center and/or axis marking, and secondly a virtual centering target corresponding to the position desired for the center marking relative to a reference point of the rim of the frame; f) deducing a corrected relative position for the reference point of the frame rim relative to the center marking, or vice versa; and g) putting the shadow of the centering marking of the lens manually into coincidence with the centering virtual target.

Abstract: The device includes receiver elements (121, 114) for receiving the ophthalmic lens; on either side of the receiver elements, firstly lighting elements (S) for illuminating the ophthalmic lens (103) installed on the receiver elements, and secondly acquisition elements (122, 125, C) for acquiring the shadow of the ophthalmic lens illuminated by the lighting elements (S); measurement elements (S, 124, C) suitable for measuring the optical deflection power exerted by the ophthalmic lens on at least one light ray and for delivering a signal representative of the deflection power; and an electronic and computer system including geometrical correction calculation instructions for deducing from the measured deflection power a corrected shape for at least a portion of the shadow of the ophthalmic lens as perceived by the acquisition elements (122, 125, C).

Abstract: An ophthalmic diagnostic apparatus, includes a first body (6), for viewing from a given position (4) and a second body (7, 8), for viewing from the position (4), each embodied for display of ophthalmic test patterns, the second body (7, 8) for viewing, being arranged between the first body (6) for viewing and the given position (4). The apparatus further includes a control module (5) for the first and second bodies for viewing, embodied for arranging the bodies in a first configuration in which the second body (7, 8) for viewing is in a condition giving symbols and the first body (6) for viewing is in a plain condition and a second configuration in which the second body (7, 8) for viewing is in a transparent condition and the first body (6) for viewing is in a condition giving symbols.

Abstract: Device (100) for automatically detecting various characteristics of an ophthalmic lens (10), the device includes a support (110) adapted to receive the lens. The support is displaceable in translation along two mutually perpendicular axes, and include elements for forming a positioning image on first acquisition and analysis elements.

Abstract: The invention relates to a method of verifying at least one centering characteristic of an ophthalmic lens provided with markings and mounted on a frame, the method comprising the following steps: a) positioning the ophthalmic lens on a support placed facing a pattern filter; b) using a diffuse light source to illuminate the ophthalmic lens through said pattern filter; c) using a digital camera to pick up the light transmitted by the ophthalmic lens; d) processing the signal output by the digital camera to determine the positions of the markings of the ophthalmic lens in a stationary frame of reference; e) determining the position of the support in the stationary frame of reference; and f) deducing the value of said centering characteristic from the known position of the support and from the positions of the permanent markings of the ophthalmic lens.

Abstract: A device (100) enabling automatic detection of the index marks of an ophthalmic lens (10), includes a support (110) which is adapted in such a way as to receive the lens, and, on each side of the support, first elements (120) for the illumination of the ophthalmic lens installed on the support, and first elements (130) for analysis and acquisition of the light transmitted by the lens. The device also includes an activatable and deactivatable pattern filter (140) arranged between the first illuminating elements and the support.

Abstract: A device for automatically detecting characteristics of an ophthalmic lens includes a support receiving the lens, an illumination system and an analysis system. The optics of the illumination system define two alternate optical paths, one of which passes through a mask forming a Hartmann matrix.

Abstract: A device for automatically detecting characteristics of an ophthalmic lens includes a support receiving the lens, an illumination system and an analysis system. The optics of the illumination system define two alternate optical paths, one of which passes through a mask forming a Hartmann matrix.