DE202006015267U1 - Device for determination of horizontal centration points at spectacles, comprises left and right scale and sighting device - Google Patents

Abstract

The device (10) has a brick-shaped base (12) with a scale located at one of the edges of the lower surface (14). A sighting device (20) is positioned at the opposite edge (16). A pair of glasses (22) can be placed on top of the base (12) and held in position by an elevation (24,26) appropriately shaped for being inserted in to the space left for the nose of the user. The scale (18) is separated into a left and a right segment for sighting the individual lenses. A second scale is positioned adjacent to each of the first facilitating a marking of a particular spot.

Description

The The present invention relates to a device for determination of Zentrierdaten a pair of glasses, in particular for the determination of Distances and / or Positions of centering points of spectacle lenses of spectacles.

to Measurement of the centering points of a pair of glasses are usually the same devices as used to measure a pupil distance of the eyes of a patient. Such devices are in particular pupillometers, video centering systems and conventional ones PD rulers. Further developments of PD rulers can be designed as calipers. For one Measurement of centering points of spectacles, in particular with bent ones Versions or with large Bracket angle are the known PD rulers, however only limited suitable. Due to the distance between the centering points of the lenses of the PD ruler leads a deviation of the viewing direction from the frontal sighting direction when aiming the centering points for reading inaccuracies. These so-called parallax errors are the greater the greater the distance of the respective Center point of the PD ruler is. In special video systems such Parallax errors due to telecentric beam paths are avoided. Indeed Such video systems are usually very complex, expensive to operate and expensive.

task the present invention is to provide a low-cost device which with simple handling an improved measurement of Zentrierdaten a pair of glasses.

These The object is achieved by a device with the specified in claim 1 Characteristics solved. Preferred embodiments are the subject of the dependent claims.

• – zumindest eine erste Messskala zur Längenmessung in zumindest einer Messrichtung der Vorrichtung, wobei die erste Messskala einen ersten linken und einen ersten rechten Skalenabschnitt zum Anvisieren eines linken bzw. rechten Brillenglases der Brille in zumindest einer Visierrichtung der Vorrichtung umfasst; und
• – eine Visiereinrichtung mit zumindest einem linken und einem rechten Visiermarkierungsabschnitt, wobei der linke bzw. rechte Visiermarkierungsabschnitt in der Visierrichtung jeweils von dem ersten linken bzw. ersten rechten Skalenabschnitt beabstandet ist und in Projektion parallel zur Visierrichtung zumindest teilweise mit dem ersten linken bzw. ersten rechten Skalenabschnitt überlappt.

Thus, the present invention provides a device for determining centering data of spectacles, in particular for determining positions and / or distances of centering points of spectacle lenses of the spectacles, the device comprising:

• At least one first measuring scale for length measurement in at least one measuring direction of the device, wherein the first measuring scale comprises a first left and a right right scale section for sighting a left or right spectacle lens of the spectacles in at least one sighting direction of the device; and
• A sighting device with at least one left and right sighting marking section, wherein the left and right sighting marking sections are respectively spaced from the first left and first right scale sections in the sighting direction and at least partially projecting parallel to the sighting direction with the first left and first right, respectively Scale section overlaps.

In order to let yourself directly during the reading of centering data from the measuring scale of the device when sighting for example the centering points of spectacle lenses one Glasses over determine the measuring scale and the sighting device, whether for a parallax-free Measurement required sighting direction is maintained. Preferably the measuring scale and the sighting device have markings, between which a correlation is recognizable if and only if required sighting direction is maintained. As such marks for example Visor crosses, lines, rings, points or other suitable markings be used. Particularly preferred for the sighting scale marks similar to Used markings of the first scale sections. By a solid Position of the sighting device relative to the measuring scale is the Sighting direction of the device accurately defined and for the user directly during the reading of centering verifiable. This simplifies and improves the determination of centering data of a Glasses. In particular, the device according to the invention improved a parallax free it measuring the individual center points of Spectacles, in particular spectacles with a large lens angle, such as. of sports glasses.

When Measuring scale can be a scale with markings like a Rulers be provided in one direction, in particular the measuring direction. Here, the measuring scale can in particular be a plurality of preferably equidistant, include parallel lines. The measuring scale can also be used for length measurement be designed in two different directions. For example could In addition to scaling in the measuring direction, it also scales in a direction perpendicular thereto. In particular, the Measuring scale include a line grid. In a preferred embodiment are the left and the right scale section in the measuring direction from each other spaced. In an alternative embodiment, they can also a consistent one Form scaling, ie directly adjacent to each other. Preferably the at least one measuring direction is substantially perpendicular to the at least one sighting direction.

Preferably The sighting device comprises a second measuring scale with a second left and a second right scale section, the second left and the second right scale section the left and right Visor marking section comprises.

In a preferred embodiment to the device comprises a device body which is at least partially transparent to visible light and has an at least partially substantially planar first surface and an at least partially substantially planar second surface, the first measuring scale being arranged on the first surface and the right and left sighting marking on the second surface , In particular, therefore, preferably the second left and the second right scale portion are arranged on the second surface. The first surface is preferably arranged at least in regions parallel to the second surface.

Preferably The device body forms in the essentially a cuboid whose cuboid length extends in the measuring direction and its cuboid width the distance between the sighting marking sections and the scale sections, in particular the distance between the first and second area. Preferably, the distance of the first measuring scale from the sighting device in the direction of sight in the range between 2 mm and 50 mm, preferably between 5 mm and 20 mm, most preferably about 10 mm. Especially have the first and second surfaces preferably a mutual distance in the range between 2 mm and 50 mm, more preferably between 5 mm and 20 mm most preferably about 10 mm. This distance corresponds preferably the cuboid width. Preferably, the length of the device body, in particular the cuboid length, in a range between 80 mm and 150 mm, more preferably between 100 mm and 120 mm.

In a preferred embodiment The first and / or second measuring scale comprises a millimeter scale.

Preferably The device comprises a spectacle abutment surface, in which a nose projection designed for the centered application of a nose recess of a pair of glasses is. In this case, the spectacle contact surface preferably has one System normal direction, wherein the nose projection preferably from a nose segment is formed, which is a trapezoidal or part-circular Cross section perpendicular to the plant normal direction. In a another preferred embodiment could the cross section of the nose segment perpendicular to the plant normal direction also have a different shape. In particular, the cross section could be triangular or be elliptical. In a preferred embodiment, the nasal segment is one piece with the device body educated. The nasal segment preferably forms a centering piece for escape the rulers with the central axis of the glasses.

Preferably the device has a plane of symmetry such that the first left scale section and / or the left sight marker section regarding the Symmetrieebene symmetrical to the first right scale section or to right Visiermarkierungsabschnitt is formed and / or the Nose projection is symmetrical to the plane of symmetry.

Preferably The device comprises a tripod with at least one tripod leg and at least a tripod foot. Thus, the device can be used as a tabletop device and must while of the measurement process are not held by users.

The The invention will be described below with reference to the accompanying drawings preferred embodiments described by way of example. Showing:

1 a side view of a device according to a first preferred embodiment of the present invention together with a pair of spectacles to be measured;

2 : A top view of the embodiment of 1 ;

3 FIG. 4: a front view of the embodiment of FIG 1 and 2 parallel to the sighting direction;

4 FIG. 4: a front view of the embodiment of FIG 1 to 3 from a slightly tilted direction to the sighting direction; and

5 : A side view of a device according to a second preferred embodiment of the present invention together with a pair of spectacles to be measured.

1 shows a device 10 according to a first preferred embodiment of the present invention. In this embodiment, the device comprises 10 a cuboid device body 12 , The device body 12 has a planar first surface 14 and a second surface parallel thereto 16 on. The first area 14 and the second surface 16 form a front surface or rear surface of the cuboid. As will be seen in more detail in the following figures, for example, in an edge region of the first surface 14 a first measuring scale 18 educated. The first measuring scale 18 is opposite in an edge region of the second surface 16 a sighting device 20 arranged.

The second area 16 at least partially forms a spectacle contact surface for applying spectacles 22 , In this eyeglass contact surface, a step is formed, which has a nose projection 24 forms. This is to the device body 12 and in particular to the rear surface 16 of the device body 12 a nose segment 26 arranged. In a preferred embodiment, the nasal segment 26 integral with the device body 12 be educated. When wearing glasses 22 to the eyeglass contact surface of the device 10 grabs the nose segment 26 in a nose recess of the glasses 22 one. In particular, can be a bridge or a bridge and / or a nose padding of the glasses 22 to the nose tab 24 the eyeglass contact surface, ie to arrange the stage in the spectacle contact surface. The spectacle contact surface has a system normal direction D _N. As in 2 shown, the nasal segment 26 in the embodiment shown on a trapezoidal cross section perpendicular to the plant normal direction D _N on.

The glasses 22 includes a spectacle frame 30 , whose upper edge 32 parallel to a longitudinal edge of the device body 12 and in particular parallel to a top edge 34 of the device body 12 can be aligned.

As in 2 shown, includes the first measurement scale 18 a first left scale section 36 for sighting a left lens and in particular a left centering point 40 of the left lens 38 the glasses 22 in at least one sighting direction D _{V of} the device 10 , It also includes the first measurement scale 18 a first right scale section 42 for sighting a right spectacle lens 44 and in particular a right centering point 46 of the right spectacle lens 44 the glasses 22 in the sighting direction D _V. The first left scale section 36 and the first right scale section 42 each have a scale graduation in centimeters and millimeters. Preferably, at least one of the first or second measurement scales also includes a scaling label. In particular, the first scale sections comprise 36 . 42 Scaling marks for length or position measurement in at least one measuring direction D _M. This makes it possible in particular the positions and / or distances of the centering points 40 . 46 the glasses 22 determine. The markings of the first measuring scale and / or the sighting device are preferably in a suitable manner by gluing and / or printing and / or engraving in or on the first or second surface 14 . 16 arranged.

In the preferred embodiment shown, the sighting device comprises 20 a second left scale section 48 and a second right scale section 50 , each from the first left 36 or right scale section 42 around one in 1 shown cuboid width b are spaced. Preferably, the second left scale section 48 and the second right scale section 50 essentially identical or identical to the first left scale section 36 or the first right scale section 42 formed, ie they preferably have substantially the same scale orientation, expansion and / or division. The second scale sections 48 . 50 are thus preferably parallel to the first scale sections 36 . 42 arranged.

In the embodiment shown, the device 10 a symmetry plane E _S such that both the nasal segment 26 as well as the first measurement scale 18 and the sighting device 20 symmetrical with respect to the plane of symmetry E _{S are} formed. Although in the embodiment shown both the first measurement scale 18 as well as the sighting device 20 each having two separate scale sections, namely a respective left and a right scale section, in another preferred embodiment, these scale sections may also adjoin one another directly and form a continuous first or second measuring scale.

In a further preferred embodiment, the sighting device 20 instead of one to the first measurement scale 18 have substantially the same training second scale or in addition to other or further sighting marks. For example, instead of a millimeter scale, only centimeter marks and / or 0.5 cm marks could be made in the visor marking portions 48 . 50 be provided. Preferably, the sighting device comprises 20 Markings, which with markings of the first measuring scale and in particular with scale marks of the first measuring scale 18 are correlated. This is the correlation when sighting the lenses 38 . 44 over the first scale 18 and the sighting device 20 exactly recognizable if the direction of the sighting in a direction of sight D _{V of} the device 10 he follows. The correlation is thereby preferably recognizable by the fact that markings of the first measuring scale coincide at least partially with markings of the sighting device or stand "on the gap".

In particular, if the length measurement or position measurement is to take place only in a measuring direction D _M , the device may have a plurality of sighting directions D _V , which are preferably in planes perpendicular to the measuring direction D _M. These sighting directions D _V thereby form sight planes, which are preferably parallel to the plane of symmetry E _S. In particular, for example, the in 1 illustrated system normal direction D _N as the sighting direction of the device 10 suitable.

3 and 4 show a device 10 according to a preferred embodiment of the present invention together with a pair of spectacles 22 during a measurement of the Zentrierpunktpositionen or the Zentrierpunktabstände in the measuring direction D _M for the left 40 or right center point 46 of the left 38 or right spectacle lens 44 , 3 shows a situation in the centering points 40 . 46 exactly in a direction of sight D _{V of} the device 10 over the first measuring scale 18 and the sighting device 20 be targeted. The glasses 22 is with the spectacle frame 30 in the area of the nose recess on the nose projection 24 the device 10 arranged and the upper edge of the frame 32 is parallel to the device longitudinal edge 34 aligned. When aiming the left center point 40 of the left lens 38 over the first left scale section 36 and the second left scale section 48 in exactly one direction of sight D _{V of} the device 10 In the embodiment shown, the two left scale sections come 36 . 48 exactly to cover. This applies analogously to the first and second right scale section 42 . 50 when aiming the right center point 46 of the right spectacle lens 44 in a direction parallel to the sighting direction D _{V of} the device 10 ,

Be the centering points 40 . 46 via a direction other than a sighting direction D _{V of} the device 10 envisaged, so come, as in 4 shown, the respective scale sections of the first and second Meßscala not to cover. This can be ensured during the measurement in a simple manner that the sighting of the measuring points of the glasses 22 exactly in a direction parallel to the sighting direction D _{V of} the device 10 he follows. This avoids parallax errors in the measurement.

5 shows a device for determining centering data of a pair of spectacles according to another preferred embodiment of the present invention. In this embodiment, the device comprises 10 a tripod with a tripod leg 52 and a tripod foot 54 , In this preferred embodiment, the device is thus designed as a desktop device. As a result, an operator no longer needs the device 10 and the spectacle frame 30 hold simultaneously.

The inventive device thus improves in particular a parallax-free measurement of Centering points with respect to the center axis of a pair of glasses. Parallaxenfreiheit is preferably by means of the fixation of the centering reached two coincidental rulers in coincidence. This is one accurate and easy control of the center point distances in the Glasses possible. The centering point distances correspond to the pupil distances in a spectacle wearer and are for an optimal vision important.

Consequently In particular, the invention provides a device for parallax-free Measurement of centering points with respect to the center axis of a pair of spectacles. For this purpose, the device is placed centered on the spectacle frame and specifically the previously marked centering points of the glasses both rulers targeted. The distances of the centering points can then the scales on the right (for the PD right) and left (for the PD left) are read parallax-free.

10

contraption

12

device body

14

first Area, front surface

16

second Area, rear surface

18

first measurement scale

20

sight

22

glasses

24

nose ahead

26

nose segment

28

version top

30

eyeglass frame

32

version top

34

Device longitudinal edge

36

first left scale section

38

left lens

40

left centration

42

first right scale section

44

right lens

46

right centration

48

second left scale section

50

second right scale section

52

tripod leg

54

stand base

D _V

pointing direction

D _M

measuring direction

D _N

Conditioning normal direction

E _S

plane of symmetry

l

length

b

width

Claims (11)

Contraption ( 10 ) for determining centering data of a pair of spectacles ( 22 ) comprising: at least a first measuring scale ( 18 ) for length measurement in at least one measuring direction (D _M ) of the device ( 10 ), where the first measurement scale ( 18 ) a first left scale section ( 36 ) and a first right scale section ( 42 ) for sighting a left lens ( 38 ) or a right-hand spectacle lens ( 44 ) of the glasses ( 22 ) in at least one sighting direction (D _V ) of the device ( 10 ); and - a sighting device ( 20 ) having at least a left siren marking portion and a right siren marking portion, wherein the left and right siren marking portions in the sighting direction (D _V ) are respectively spaced from the first left and first right scale portions (FIG. 36 . 42 ) is spaced apart and in projection parallel to the sighting direction (D _V ) at least partially with the first left and first right scale portion ( 36 . 42 ) overlaps. Apparatus according to claim 1, wherein the sighting device ( 20 ) a second measuring scale with a second left scale section ( 48 ) and a second right scale section ( 50 ), wherein the second left and the second right scale section ( 48 . 50 ) includes the left and right sighting portions. Device according to one of the preceding claims, wherein the device ( 10 ) a device body (at least partially transparent to visible light) ( 12 ) with an at least partially substantially planar first surface ( 14 ) and an at least partially substantially planar second surface ( 16 ), wherein the first measuring scale ( 18 ) on the first surface ( 14 ) and the right and left visor marking portions on the second surface ( 16 ) is arranged. Apparatus according to claim 3, wherein the first surface ( 14 ) at least partially parallel to the second surface ( 16 ) is arranged. Apparatus according to claim 4, wherein the device body ( 12 ) substantially forms a cuboid, the cuboid length (L) extending in the measuring direction (D _M ) and whose cuboid width (b) the distance between the first surface (B) 14 ) and the second surface ( 16 ). Device according to one of claims 3 to 5, wherein the first and second surfaces ( 14 . 16 ) have a mutual distance in the range between 2 mm and 50 mm, preferably between 5 mm and 20 mm, most preferably about 10 mm. Device according to one of the preceding claims, wherein the first and / or second measuring scale comprises a millimeter scale. Device according to one of the preceding claims, comprising a spectacle abutment surface, in which a nose projection ( 24 ) for the centered application of a nose recess of the spectacles ( 22 ) is trained. Apparatus according to claim 8, wherein the spectacle contact surface has a plant normal direction (D _N ) and the nose projection ( 24 ) of a nasal segment ( 26 ) is formed, which has a trapezoidal or circular section-shaped cross section perpendicular to the plant normal direction (D _N ). Device according to one of the preceding claims, which has a plane of symmetry (E _S ) such that the first left scale section (E) 36 ) and the left sighting marking section with respect to the plane of symmetry (E _S ) symmetrical to the first right-hand scale section (FIG. 42 ) is formed or to the right Visiermarkierungsabschnitt and / or the nose projection ( 24 ) and / or the nasal segment ( 26 ) is symmetrical to the plane of symmetry (E _S ). Device according to one of the preceding claims, comprising a stand with at least one tripod leg ( 52 ) and at least one stand base ( 54 ).