摘要:
Disclosed is a method for designing and optimizing an individual spectacle glass. The invention is characterized in that a design is sketched by an optician at a video workstation by means of a computer program. Said design is transmitted to a manufacturer or to an optical calculation bureau and the manufacturer optimizes an individual spectacle glass according to said information.
摘要:
Disclosed is a method for determining the optimum individual length of progression of a progressive lens using the measured distance between the vertex of the cornea and a pre-adapted spectacle frame. The invention is characterized by the following steps: a) measurement of the individual distance (HSA) between the vertex of the cornea and a pre-adapted spectacle frame; b) measurement of the individual distance between a distant reference point BF and a centering cross ZK; c) determination of the optimum and individual length of progression (Lopt) according to the following formula: Lopt = 0.63 * (HSA+ 13.5 mm) + d(BF, ZK).
摘要:
The invention relates to a spectacle lens comprising: an area (distance-vision part), which is designed for viewing at long distances and, in particular, viewing to infinity ; an area (near-vision part), which is designed for viewing at short distances and, in particular, at reading distances , and; a progression zone, which is located between said distance-vision part and near-vision part and in which the effect of the spectacle lens increases, along a curve (principal line) that winds up to the nose from the value in the distance reference point located in the distance-vision part to the value of the near reference point located in the near-vision part. The invention is characterized, among other things, in that certain conditions apply for minimizing the image-forming properties during horizontal viewing movements along the curve, which is formed by the points of intersection of the principal rays with the front surface, whereby at the beginning of the movement, these principal rays pass through the point with the coordinates (x-dx,y,s) up to the point with the coordinates (x+dx,y,s) upon completion of the movement, whereby s = -40 mm and dx = 10 mm.
摘要:
Disclosed is a spectacle glass provided with an area for looking into relatively far distances, especially endless distances (long distance part), and an area for looking into relatively short distances and especially distances designed for reading (short distance part), in addition to an area of progression located between the long distance part and the short distance part, wherein the effect of the spectacle glass increases from a value in the long distance reference point located in the long distance part to the value of a short distance reference point located in the short distance part along a curve which is oriented towards the nose (main line) . The invention is characterized in that astigmatic aberration, i.e. the difference between prescribed astigmatism and real astigmatism along circles with a center located 4mm below the centering point and with a diameter of 10 40 mm fulfils the following conditions: two local minima appear in the right spectacle at 95° + 10°(according to Tabo) and at 280° + 10° and in the left spectacle at 85°+ 10° and 260° + 10°; two local maxima appear in both the right spectacle and the left spectacle at 215° + 10° and 335°+10°.
摘要:
The invention relates to a spectacle lens comprising: a zone designed for looking into the far distance and in particular 'into infinity' (distance portion); a zone designed for looking into the near distance, in particular 'reading distance' (near portion); and a progression zone arranged between the far portion and the near portion. In said progression zone, the effect of the spectacle lens increases, starting from the value of the far reference point which lies in the far portion to the value of the near reference point which lies in the near portion, along a curve (principal line) which bends towards the nose. The invention is characterized among other things in that the motion trajectories fulfil specific conditions.
摘要:
Beschrieben wird eine Brille mit einer Brücke und Bügeln, die direkt, d.h. ohne Gläserringe mit den Brillengläsern verbunden sind. Die Erfindung zeichnet sich dadurch aus, daß die Brücke und/oder die Bügel derart mit den Brillengläsern über Verbindungselemente verbunden sind, daß sie ohne Zerstörung der Brücke bzw. der Bügel nicht gelöst werden können.
摘要:
The description relates to a progressive spectacle lens having at least one surface in which the focal power changes in such a way that, from at least one region in which the effect of the lens is approximately constant, said effect changes along at least one line (hereinafter referred to as the main line) which may be in a plane or bent and on which there is a predeterminable astigmatism not equal to zero dpt. The invention is distinguished in that the surface astigmatism on the main line has not only a given value but also a generally non-constant axial position along the main line such that the total astigmatism of the resulting beam, taking into account of the astigmatic oblique beams, is virtually constant towards the eye-side surface along the main line or is variable in both value and axial position according to physiological requirements.
摘要:
Beschrieben wird ein Brillenglas mit progressiver und astigmatischer Wirkung, das eine Fläche aufweist, deren Flächenbrechkraft sich ausgehend von mindestens einem Bereich, in dem die Wirkung des Brillenglases zumindest annähernd konstant ist, sich längs wenigstens einer Linie (i. f. als Hauptlinie bezeichnet) ändert, und bei dem die Fläche, die zur Änderung der Wirkung beiträgt, auch zu dem zu Korrektionszwecken dienenden Astigmatismus beiträgt. Die Erfindung zeichnet sich aus durch die Kombination folgender Merkmale
die zweite Fläche ist eine Fläche mit astigmatischer Wirkung und insbesondere eine atorische Fläche, die Hauptlinie ist eine gewundene Linie, die in etwa mit der Hauptblicklinie zusammenfällt, die das Auge bei einer Blicksenkung beschreibt, die Hauptlinie existiert auch in den Bereichen mit zumindest annähernd konstanter Wirkung, der Flächenastigmatismus hat auf der Hauptlinie nicht nur einen bestimmten Betrag, sondern auch eine derartige längs der Hauptlinie in der Regel nicht konstante Achslage, daß der unter Berücksichtigung des Astigmatismus schiefer Bündel resultierende Gesamtastigmatismus des Strahlenbündels nach der augenseitigen Fläche längs der Hauptlinie nahezu konstant oder nach physiologischen Anforderungen variabel sowohl bezüglich Betrag als auch Achslage ist.
摘要:
The description relates to an object of synthetic material, especially a plastic spectacle lens, tinted with at least one photochromatic substance which is also excited by light in the u/v region of the spectrum and, in the excited state, exhibits a greater adsorption -- according to the spectral brightness sensitivity of the human eye --than in the unexcited state, and in which there is also at least one u/v absorbent material in a concentration such that the darkening of the photochromic substance(s) is independent of the u/v content of the exciting light. The darkening intensity depends rather on the brightness, i.e. the intensity integrated over the spectral brightness sensitivity of the human eye V lambda .
摘要:
This invention regards a progressive spectacle lens with at least one area (far vision zone), the power of which is suited for far vision, at least one area (near vision zone), the power of which is suited for near vision, and at least one progressive zone, in which the power progressively changes along a sinuous line (Main Line HL) from the power of the far vision zone to the power of the near vision zone, wherein at least one surface of the spectacle lens contributes to the change in power. The spectacle lens according to the invention is characterised by the fact that the amount of the surface astigmatism of at least one of the surfaces contributing to the power change along at least one section of the spectacle lens with a horizontal plane (y= const., i.f. horizontal section) has a local maximum with a distance of no more than 4 mm, preferably 2 mm, from the main line and has at least one local minimum, which does not lie on the main line and whose distance from the main line is greater than the distance of the local maximum.