JP3143738U - Device for calculating centering data of glasses - Google Patents

Abstract

An eyeglass centering data measuring device that is easy to handle, can be measured with high accuracy, and is inexpensive.
A first measuring graduation 18 for measuring the length at A measuring direction, the first measuring graduation 18 is aiming suit left spectacle lenses or the right spectacle lenses of the spectacles 22 in the aiming direction D _V of the device 10 the first and the left scale area or first right scale section of include sight 20 with a left sighting mark section and the right sighting mark area, left or right aiming mark zone, first the left or in the aiming direction D _V spaced apart respectively from the first right scale area, and the aiming direction D _V and when projected parallel to the first left or first right scale zone and at least partially overlap.
[Selection] Figure 1

Description

  The present invention relates to an apparatus for calculating the centering data of spectacles, in particular for calculating the distance and / or position of the spectacle lens centering point of the spectacles.

  Usually the same device is used to measure the centering point of the eyeglasses, which measures the interpupillary distance of the patient's eyes. Such devices are in particular pupilometers, video centering systems, and conventional PD rulers. The improved PD ruler can be configured as a caliper. However, in particular, known PD rulers are only suitable for measuring the centering points of glasses with bent frames or large frame plate angles. Due to the distance between the centering point of the spectacle lens and the PD ruler, the deviation of the viewing direction from the frontal aiming direction results in inaccuracy of reading when aiming at the centering point. This so-called parallax error increases as the distance between each centering point and the PD ruler increases. In special video systems, such parallax errors can be avoided by the telecentric light path. However, such video systems are usually very complex, time consuming and expensive to operate.

  An object of the present invention is to provide an inexpensive apparatus that can improve the measurement of eyeglass centering data with simple handling.

  This problem is solved with a device having the features specified in claim 1. Preferred embodiments are the subject of the dependent claims.

Therefore, the present invention provides an apparatus for calculating the centering data of glasses,
Including at least one first measurement scale for measuring length in at least one measurement direction of the device, the first measurement scale being aimed at the left or right spectacle lens of the glasses in at least one aiming direction of the device Including a first left scale area and a first right scale area,
A sighting device comprising at least one left aiming mark area and one right aiming mark area, the left or right aiming mark area being spaced apart from the first left or first right scale area, respectively, in the aiming direction; And when projected parallel to the aiming direction, it overlaps at least partially with the first left or first right graduation area.

  Thus, for example, when aiming the centering point of a spectacle lens of an eyeglass, the aiming direction required for the measurement without parallax is observed directly through the measurement scale and the sighting device while reading the centering data from the measurement scale of the device. It can be confirmed whether or not it is done. In particular, when the measurement scale and the sight have marks and the required aiming direction is observed, the correlation between the marks can be recognized accurately. Such a mark could be, for example, an aiming cross, aiming line, aiming wheel, aiming point or other suitable mark. Particularly preferably, a scaling mark similar to the mark on the first graduation area is used for the sight. The aiming direction of the device is accurately determined by the fixed position of the aiming device relative to the measurement graduation and can be checked directly by the user during the reading of the centering data. This simplifies and improves the calculation of eyeglass centering data. The device according to the invention improves in particular the neglected difference measurement of the individual centering points of glasses, in particular glasses with a large frame plate angle, for example sports glasses.

  A scale having a mark like a ruler in one direction, particularly the measurement direction, can be provided as a measurement scale. Here, the measurement scale can include a number of inter alia evenly spaced parallel lines. The measurement scale can also be designed to measure the length in two different directions. For example, a measurement scale could have scaling in a direction perpendicular to it in addition to scaling in the measurement direction. In particular, the measurement scale could include a line grid. In a preferred embodiment, the left scale area and the right scale area are spaced from each other in the measurement direction. In an alternative embodiment, the graduation areas can also form a consistent scaling, i.e. directly adjacent to each other. In particular, the at least one measuring direction is substantially perpendicular to the at least one aiming direction.

  Preferably, the sight includes a second measurement graduation with a second left graduation area and a second right graduation area, and the second left or second right graduation area includes a left or right aim mark area.

  In a preferred embodiment, the device includes a device body that is at least partially transparent to visible light, the device body having a first surface that is at least intermittently substantially flat and a second surface that is at least intermittently substantially flat. The first measurement scale is arranged on the first surface, and the right and left aiming mark areas are arranged on the second surface. Thus, in particular, the second left and second right scale areas are preferably arranged on the second surface. The first surface is preferably arranged at least intermittently in parallel with the second surface.

  Preferably, the apparatus main body substantially forms a rectangular parallelepiped, the length of the rectangular parallelepiped extends in the measurement direction, and the width of the rectangular parallelepiped determines the distance between the first surface and the second surface. Preferably, the distance between the first measurement scale and the sighting device in the aiming direction is in the range of 2 mm to 50 mm, preferably 5 mm to 20 mm, more preferably approximately 10 mm. In particular, the mutual distance between the first and second surfaces is in the range of 2 mm to 50 mm, preferably 5 mm to 20 mm, more preferably approximately 10 mm. This distance preferably corresponds to the width of the cuboid. Preferably, the length of the apparatus main body, particularly the length of the rectangular parallelepiped is 80 mm to 150 mm, more preferably 100 mm to 120 mm.

  In a preferred embodiment, the first measurement scale and / or the second measurement scale includes a millimeter scale.

  Preferably, the apparatus includes an eyeglass contact surface, and a nose protrusion for centering and contacting the nose notch portion of the eyeglass is formed on the eyeglass contact surface. The spectacle abutment surface has an abutment normal direction, and the nasal projection is preferably formed by a nose segment, the nose segment having a trapezoidal or circular-section cross section perpendicular to the abutment normal direction. . In another preferred embodiment, the cross section of the nose segment perpendicular to the abutment normal direction could have other shapes. In particular, the cross section could be triangular or elliptical. In a preferred embodiment, the nose segment is constructed integrally with the device body. The nose segment preferably forms a centering member for aligning the ruler with the central axis of the glasses.

  Preferably, the device has a plane of symmetry, the first left scale area and / or the left aim mark area is configured symmetrically with respect to the first right scale area or right aim mark area with respect to the plane of symmetry, and / or The nasal process is symmetric with respect to the plane of symmetry.

  Preferably, the device comprises a tripod with at least one leg and at least one base. Thus, the device can be used as a desktop device and does not need to be held by the user during the measurement process.

  Hereinafter, the present invention will be described by way of example with reference to the accompanying drawings showing preferred embodiments.

  FIG. 1 shows an apparatus 10 according to a first preferred embodiment of the present invention. In this embodiment, the device 10 includes a rectangular parallelepiped device body 12. The apparatus main body 12 has a flat first surface 14 and a second surface 16 parallel thereto. The first surface 14 and the second surface 16 form a front surface or a back surface of a rectangular parallelepiped. In the following, for example, a first measurement scale 18 is formed in the edge region of the first surface 14 so that it can still be recognized accurately in the other figures. A sight 20 is arranged in the edge region of the second surface 16 on the side opposite to the first measurement scale 18.

The second surface 16 at least partially forms a glasses contact surface for contacting the glasses 22. The step formed on the eyeglass contact surface forms the nose protrusion 24. For this reason, a nose segment 26 is arranged on the device body 12, in particular on the back surface 16 of the device body 12. In a preferred embodiment, the nose segment 26 can be configured integrally with the device body 12. When the eyeglasses 22 come into contact with the eyeglass contact surface of the apparatus 10, the nose segment 26 bites into the nose notch portion of the eyeglasses 22. In particular, the abdomen or bridge and / or nose pad of the spectacles 22 can be arranged on the nose projection 24 on the spectacle contact surface, that is, on the step of the spectacle contact surface. Glasses abutment surface has a contact normal direction D _N. As shown in FIG. 2, it has a vertically trapezoidal cross-section with respect to the nose segments 26 in the illustrated embodiment abuts the normal direction D _N.

  The spectacles 22 include a spectacle frame 30 whose upper edge 32 can be oriented parallel to the longitudinal edge of the apparatus body 12, in particular parallel to the upper edge 34 of the apparatus body 12.

As shown in FIG. 2, a first for aiming fit the left centering point 40 of the left eyeglass lenses and in particular the left spectacle lens 38 of the eyeglasses 22 in at least one sighting direction D _V of the first measuring graduation 18 10 It includes a left scale area 36. Further, the first measuring graduation 18 includes a first right scale area 42 for aiming fit right centering point 46 of the right spectacle lens 44 and particularly the right spectacle lens 44 of the eyeglasses 22 in the aiming direction D _V. The first left scale area 36 and the first right scale area 42 have scale sections in centimeters and millimeters, respectively. Preferably, at least the first or second measurement scale further includes a scaling text. In particular, the first scale zone 36 and 42 includes a scaling mark for measuring the length or the position of at least one measurement direction D _M. In this way, in particular the position and / or distance of the centering points 40, 46 of the glasses 22 can be calculated. The marks of the first measuring scale and / or the sighting are preferably arranged in or on the first or second surface 14, 16 by means of application and / or printing and / or engraving, among others.

  In the preferred embodiment shown, the sight 20 includes a second left graduation area 48 and a second right graduation area 50, the graduation areas from the first left graduation area 36 or the first right graduation area 42, respectively, as shown in FIG. They are separated by a width b. Preferably, the second left graduation area 48 and the second right graduation area 50 are configured substantially the same as or identical to the first left graduation area 36 or the first right graduation area 42, i.e., in particular, substantially the same graduation orientation. , Spread and / or segmented. The second graduation areas 48, 50 are in particular arranged parallel to the first graduation areas 36, 42.

In the illustrated embodiment, the device 10 has a plane of symmetry E _S , and the nose segment 26 as well as the first measurement scale 18 and the sight 20 are configured symmetrically with respect to the plane of symmetry E _S. In the illustrated embodiment, both the first measurement graduation 18 and the sighting device 20 each have two separate graduation areas, a left graduation area and a right graduation area, but these graduation areas are in another preferred embodiment. It is also possible to form a first or second measurement scale that is directly adjacent and continuous.

In other preferred embodiments, the sight 20 may have another or other aiming mark instead of, or in addition to, the second measurement graduation configured substantially the same as the first measurement graduation 18. Like. Instead of millimeter scaling, for example, centimeter marks and / or 0.5 cm marks could be provided in the aiming mark areas 48,50. In particular, the mark included in the sight 20 correlates with the mark of the first measurement scale, particularly the scaling rule of the first measurement scale 18. When aiming combined spectacle lens 38, 44, when the direction of the aim suit is in sight direction D _V of the device 10, the correlation via a first measuring graduation 18 and sight 20 becomes exactly recognizable. In particular, the correlation is recognizable when the mark on the first measurement scale at least partially coincides with or “staggers” the mark on the sight.

Especially when must simply perform the length measurement or position measurement in one measuring direction D _M, the apparatus may have a plurality of aiming direction D _V in a plane perpendicular to the particular measurement direction D _M. Aiming plane these sighting direction D _V form is especially parallel to the symmetry plane E _S. In particular, for example, the contact normal direction D _N shown in FIG. 1 also be suited as an aiming direction of the apparatus 10.

The device 10 according to the preferred embodiment of the present invention shown in FIGS. 3 and 4 together with the eyeglasses 22 in the measurement direction D _{M with} respect to the left centering point 40 or the right centering point 46 of the left eyeglass lens 38 or the right eyeglass lens 44. The centering point position or centering point distance is being measured. In the situation shown in FIG. 3 centering point 40 and 46 are aimed together via a first measuring graduation 18 and sight 20 in the aiming direction D _V exactly device 10. The eyeglasses 22 are arranged together with the eyeglass frame 30 in the region of the nasal notch of the nasal projection 24 of the device 10, and the frame upper edge 32 is oriented parallel to the device longitudinal edge 34. Through the first left scale area 36 and the second left scale zone 48 exactly at one sighting direction D _V of the device 10 in the illustrated embodiment aiming combined left centering point 40 of the left eyeglass lens 38 when both the left scale The areas 36, 48 overlap exactly. This is the first time of aiming combined right centering point 46 of the right spectacle lens 44 in the aiming direction D _V parallel unidirectional device 10, also applies analogously to the second right-side scale areas 42 and 50.

If centering points 40 and 46 are aimed together via a different direction from the aiming direction D _V of the device 10, as shown in FIG. 4, each of the scale section of the first measuring graduation and a second measurement scale heavy Don't be. Therefore already during the measurement, the aim combined measurement points of the glasses 22 is performed in exactly the direction parallel to the sighting direction D _V of the device 10 can be easily ensured. In this way, parallax errors during measurement can be avoided.

  FIG. 5 illustrates an eyeglass centering data calculation apparatus according to another preferred embodiment of the present invention. In this embodiment, the apparatus 10 includes a tripod with a leg 52 and a base 54. Thus, in this preferred embodiment, the device is implemented as a tabletop device. As a result, the operator no longer needs to hold the device 10 and the spectacle frame 30 at the same time.

  Therefore, the device according to the invention improves the neglected difference measurement of the centering point, especially with respect to the central axis of the glasses. Neglectability is achieved, among other things, by fixing the centering points in a consistent manner by two transparent rulers. Thus, an accurate and simple check of the centering distance of the glasses is possible. The centering point distance matches the interpupillary distance of the spectacle wearer and is important for optimal vision.

  The present invention thus provides a device for measuring the centering point without parallax with respect to the central axis of the glasses. For this purpose, the device is centered and abutted against the spectacle frame and is appropriately aimed at the spectacle centering points pre-marked by both rulers. Next, the distance of the centering point can be read without parallax on the right side (for PD right) and the left side (for PD left) with a ruler.

1 is a side view showing an apparatus according to a preferred first embodiment of the present invention together with glasses to be measured. It is a top view of embodiment of FIG. It is a front view which shows embodiment of FIG. 1, FIG. 2 in parallel with an aiming direction. FIG. 4 is a front view of the embodiment of FIGS. 1 to 3 as viewed from a direction slightly inclined with respect to the aiming direction. It is a side view which shows the apparatus by preferable 2nd Embodiment of this invention with to-be-measured spectacles.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 apparatus 12 apparatus main body 14 1st surface, front surface 16 2nd surface, back surface 18 1st measurement scale 20 sighting device 22 spectacles 24 nasal projection 26 nose segment 28 frame upper edge 30 spectacle frame 32 frame upper edge 34 apparatus long edge 36 first 1 Left scale area 38 Left eyeglass lens 40 Left centering point 42 1st right scale area 44 Right eyeglass lens 46 Right centering point 48 2nd left scale area 50 2nd right scale area 50 Leg 54 Base D _V Aiming direction D _M measuring direction D _N abutment normal direction E _S plane of symmetry I length b width

Claims (11)

An apparatus (10) for calculating centering data of glasses (22),
It includes at least one first measurement scale (18) for measuring the length in at least one measurement direction (D _M ) of the device (10), the first measurement scale (18) being at least one of the device (10). A first left graduation area (36) and a first right graduation area (42) for aiming at the left spectacle lens (38) or the right spectacle lens (44) of the spectacles (22) in one aiming direction (D _V ); Including
A sighting device (20) with at least one left aiming mark area and one right aiming mark area, the left or right aiming mark area being the first left or first right graduation area in the aiming direction (D _V ) A device that is spaced apart from each of (36, 42) and at least partially overlaps the first left or first right graduation area (36, 42) when projected parallel to the aiming direction (D _V ).   The sighting device (20) includes a second measurement graduation with a second left graduation area (48) and a second right graduation area (50), and the second left or second right graduation area (48, 50) is on the left or The apparatus of claim 1, comprising a right aiming mark area.   The device (10) includes a device body (12) that is at least partially transparent to visible light, the device body having a first surface (14) that is at least intermittently substantially flat and a first surface that is at least intermittently substantially flat. The first measurement scale (18) is arranged on the first surface (14) and the right and left aiming mark areas are arranged on the second surface (16). The apparatus according to 1 or 2.   4. The device according to claim 3, wherein the first surface (14) is arranged at least intermittently parallel to the second surface (16). The apparatus main body (12) substantially forms a rectangular parallelepiped, the length (l) of the rectangular parallelepiped extends in the measurement direction (D _M ), and the width (b) of the rectangular parallelepiped has a first surface (14) and a second surface (16 5. The apparatus according to claim 4, wherein the distance between is determined.   6. The mutual distance between the first and second surfaces (14, 16) is in the range of 2 mm to 50 mm, preferably in the range of 5 mm to 20 mm, more preferably approximately 10 mm. The device described in 1.   The apparatus according to claim 1, wherein the first measurement scale and / or the second measurement scale includes a millimeter scale.   The apparatus according to any one of claims 1 to 7, wherein the apparatus includes an eyeglass contact surface, and a nose protrusion (24) for centering and contacting the nose notch portion of the eyeglass (22) is formed on the eyeglass contact surface. A device according to claim 1. The eyeglass contact surface has a contact normal direction (D _N ), and a nasal projection (24) is formed by the nose segment (26), which is perpendicular to the contact normal direction (D _N ). 9. An apparatus according to claim 8 having a trapezoidal or circular slice cross section. The device has a symmetry plane (E _S ) and the first left graduation area (36) and the left aiming mark area are symmetrical with respect to the first right graduation area (42) or the right aiming mark area with respect to the symmetry plane (E _S ). And / or the nasal projection (24) or the nasal segment (26) is symmetrical with respect to a plane of symmetry (E _S ).   The device according to any one of the preceding claims, wherein the device comprises a tripod with at least one leg (52) and at least one base (54).

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