CN115054199A - Meyer ring structure device for measuring corneal curvature - Google Patents

Abstract

The invention discloses a corneal curvature measuring Meier ring structure device, which comprises: the cornea measuring device comprises a Meier ring base, a cornea peripheral curvature measuring mechanism and a cornea central curvature measuring mechanism, wherein the cornea central curvature measuring mechanism is arranged in the middle of the Meier ring base, and the cornea peripheral curvature measuring mechanism is arranged along the edge of the Meier ring base. The utility model provides a cornea camber measures maier's ring structure device measures cornea central curvature through cornea central curvature measuring mechanism, measures cornea peripheral curvature through cornea peripheral curvature measuring mechanism, and cornea peripheral curvature measuring mechanism and cornea central curvature measuring mechanism adopt independent design, through installing at maier's ring base, very easily realize the required position angle of cornea camber measurement and space size. In addition, the highly integrated form design equipment that this application provided, compact structure easily installs manufacturing.

Description

Meyer ring structure device for measuring corneal curvature

Technical Field

The invention relates to the technical field of ophthalmic equipment, in particular to a Meyer ring structure device for measuring corneal curvature.

Background

The corneal curvature value is used as a prescription criterion for wearing contact lenses on the tested eye, and the most accurate image of corneal reflection light is formed when the tested eye is just positioned at the focal distance of the detection optical path in corneal curvature measurement, so that how to accurately measure the corneal curvature value of the tested eye is meaningful. The prior optometry instrument with the corneal curvature function in China is designed to meet the corneal curvature measuring light path, a plurality of independent small structural modules are mostly adopted for assembly, the Meier ring structure is very complex, the assembly easily causes the change of the spatial distance or angle between optical components, the difficulty of light path adjustment is increased, the accurate corneal curvature value cannot be obtained, the time and the labor are wasted, and the manufacturing cost is high.

In summary, how to solve the problems of the prior refractometer, such as high difficulty in adjusting the optical path and low accuracy in measuring the corneal curvature value, is a problem to be solved urgently by those skilled in the art.

Disclosure of Invention

Accordingly, the present invention is directed to a meyer ring structure for measuring corneal curvature, which is light and compact, stable, and low in cost, and is easy to assemble, adjust and disassemble for maintenance.

In order to achieve the above purpose, the invention provides the following technical scheme:

a keratometry meyer ring configuration comprising: the cornea measuring device comprises a Meier ring base, a cornea peripheral curvature measuring mechanism and a cornea central curvature measuring mechanism, wherein the cornea central curvature measuring mechanism is arranged in the middle of the Meier ring base, and the cornea peripheral curvature measuring mechanism is arranged along the edge of the Meier ring base.

Preferably, the film center curvature measuring mechanism includes a meier ring view window plate, an image sensor, a main imaging optical path device, a collimating optical path device, and a non-collimating optical path device, the main imaging optical path device is disposed at the center of the meier ring base, the meier ring view window plate is coaxially disposed with the meier ring base, the non-collimating optical path device is disposed along the circumferential direction of the meier ring view window plate, the collimating optical path devices are respectively disposed at two sides of the main imaging optical path device, and the main imaging optical path device, the collimating optical path device, and the non-collimating optical path device are all in signal connection with the image sensor.

Preferably, the main imaging optical path device includes a first light source, a reflector, a lens, and a filter plate, and light emitted from the first light source is reflected by the reflector and passes through the filter plate.

Preferably, the collimating optical path device includes two second light sources, two first aperture diaphragm sheets, two alignment collimator lenses and two alignment filter plates, one of the second light sources corresponds to one of the first aperture diaphragm sheets, corresponds to one of the alignment collimator lenses and corresponds to one of the alignment filter plates, the first aperture diaphragm sheet is disposed between the corresponding second light source and the corresponding alignment collimator lens, the alignment filter plate is disposed on the corresponding first aperture diaphragm sheet, the second light source, the first aperture diaphragm sheet, the alignment collimator lens and the alignment filter plate are all mounted on the meier ring base through alignment mounting assemblies, and collimation through holes corresponding to the two second light sources are disposed on the surface of the meier ring window plate.

Preferably, the non-collimation light path device comprises a double-ring-shaped light source, and a double-ring-shaped through hole corresponding to the double-ring-shaped light source is arranged on the panel surface of the meier ring viewing window panel.

Preferably, the double annular light source is a lamp cluster arranged in a double annular arrangement.

Preferably, the corneal peripheral curvature measuring mechanism includes an outer light source system disposed along an outer edge of the meier ring base in a convex manner and an inner light source system disposed along a circumferential direction of the main body of the meier ring base, and both the outer light source system and the inner light source system are in signal connection with the image sensor.

Preferably, the external light source system includes four third light sources, four mounting brackets, four second aperture diaphragm sheets and four objective lenses, one third light source corresponds to one mounting bracket, corresponds to one second aperture diaphragm sheet and corresponds to one objective lens, the second aperture diaphragm sheet is disposed between the corresponding third light source and the corresponding objective lens, the third light source is mounted at the edge of the meier ring base through the corresponding mounting bracket, all the mounting brackets are disposed around the meier ring base, and the illumination focuses of the third light source and the main imaging light path device coincide with the illumination focuses of the collimation light path device and the main imaging light path device.

Preferably, the inner light source system comprises four lamp beads uniformly distributed along the circumferential direction of the main body of the meier ring base, all the lamp beads are sequentially lightened according to a preset sequence, and display holes are formed in positions, corresponding to all the lamp beads, on the meier ring window board.

Preferably, a limit groove is formed in the front end face of the meier ring base, and a limit protrusion which is correspondingly clamped into the limit groove is formed in the meier ring window plate.

The utility model provides a cornea camber measures maier's ring structure device measures cornea central curvature through cornea central curvature measuring mechanism, measures cornea peripheral curvature through cornea peripheral curvature measuring mechanism, and cornea peripheral curvature measuring mechanism and cornea central curvature measuring mechanism adopt independent design, through installing at maier's ring base, very easily realize the required position angle of cornea camber measurement and space size. In addition, the highly integrated form design equipment that this application provided, compact structure easily installs manufacturing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a partial block diagram of a Meyer ring configuration for corneal curvature measurement according to the present invention;

FIG. 2 is a schematic diagram of the installation position of the optical filter according to the present invention;

FIG. 3 is a schematic view of a dual ring light source according to the present invention;

FIG. 4 is a back structure view of a corneal curvature measuring Meyer ring configuration provided in accordance with the present invention;

FIG. 5 is a perspective view of a Mylar ring base provided by the present invention;

FIG. 6 is a perspective view of a collimated light path device provided by the present invention;

FIG. 7 is a schematic diagram of an external light source system according to the present invention;

fig. 8 is a schematic optical path diagram of a michael ring structure device for measuring corneal curvature according to the present invention.

FIGS. 1 to 8:

the device comprises a 1-Meier ring circuit board, a 2-objective lens, a 3-mounting support, a 4-Meier ring base, a 5-screw, a 6-Meier ring window plate, a 7-Meier ring end cover, an 8-limiting bulge, a 9-optical filter, a 10-window sleeve, a 11-lamp bead, a 12-outer ring lamp cluster, a 13-second light source, a 14-inner ring lamp cluster, a 15-mounting screw, a 16-screw, a 17-screw, a 18-third light source, a 19-collimation and alignment lighting sleeve, a 20-collimation and alignment lamp holder, a 21-second small hole diaphragm, a 22-alignment light filter plate, a 23-alignment collimating objective lens, a 24-first small hole diaphragm, a 25-lens, a 26-reflector and a 27-light filter plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the invention is to provide a Meyer ring structure device for measuring the corneal curvature, which has the advantages of light and compact structure, stable performance, low cost, easy assembly, light modulation, disassembly and maintenance.

Referring to fig. 1 to 8, a comeal curvature measuring meier ring structure device includes: the cornea measuring device comprises a Meier ring base 4, a cornea peripheral curvature measuring mechanism and a cornea central curvature measuring mechanism, wherein the cornea central curvature measuring mechanism is arranged in the middle of the Meier ring base 4, and the cornea peripheral curvature measuring mechanism is arranged along the edge of the Meier ring base 4.

The center of the mell ring base 4 is provided with a sleeve, an annular mounting structure is provided along the outer periphery of the sleeve, the corneal central curvature measuring mechanism is provided in the annular mounting structure and the sleeve, and the corneal peripheral curvature measuring mechanism is provided along the edge of the annular structure. Of course, the meier ring base 4 can be modified to other types of configurations depending on the application.

The Meyer ring base 4, the corneal peripheral curvature measuring mechanism and the Meyer ring structural member in the corneal central curvature measuring mechanism are all manufactured in an injection molding mode, the spatial position and the relative relation required by the corneal peripheral curvature measuring mechanism and the corneal central curvature measuring mechanism can be accurately controlled, and the measuring stability and the measuring accuracy are guaranteed more easily.

The utility model provides a cornea camber measures maier's ring structure device measures cornea central curvature through cornea central curvature measuring mechanism, measures cornea peripheral curvature through cornea peripheral curvature measuring mechanism, and cornea peripheral curvature measuring mechanism and cornea central curvature measuring mechanism adopt independent design, through installing in maier ring base 4, very easily realize the required position angle of cornea camber measurement and space size. In addition, the highly integrated form design equipment that this application provided, compact structure easily installs manufacturing.

In addition to the above embodiments, as a further preferable mode, the mechanism for measuring the central curvature of the cornea includes a meier ring view window plate 6, an image sensor, a main imaging optical path device, a collimating optical path device, and a non-collimating optical path device, the main imaging optical path device is disposed at the center of the meier ring base 4, the meier ring view window plate 6 is disposed coaxially with the meier ring base 4, the non-collimating optical path device is disposed along the circumferential direction of the meier ring view window plate 6, the collimating optical path devices are disposed at both sides of the main imaging optical path device, and the main imaging optical path device, the collimating optical path device, and the non-collimating optical path device are all signal-connected to the image sensor.

It should be noted that the main imaging optical path device irradiates light along the axial direction of the window sleeve 10 of the meier ring base 4, the collimating optical path device emits light to the light irradiated by the main imaging optical path device along both sides of the main imaging optical path device, the intersection point of the light of the collimating optical path device and the main imaging optical path device is a focus, and the main imaging optical path device and the collimating optical path device together form a collimating optical path system. The non-collimation light path device is arranged around the annular mounting structure of the Meier ring base 4, and the non-collimation light path device and the main imaging light path device jointly form a non-collimation light path system.

The main imaging light path device, the collimating light path device and the non-collimating light path device all irradiate towards the front side of the Meier ring base 4, and light rays emitted by the main imaging light path device, the non-collimating light path device and the collimating light path device all irradiate on a cornea through light ray holes in the Meier ring window plate 6. The positions of the cornea center in the horizontal direction and the vertical direction are measured through a collimation light path system, the image sensor displays in real time in the measurement process, and the corneal curvature is calculated. Then the annular light source is projected to the eyeball through a non-collimated light source system and is used for measuring the distance variation between the cornea of the human eye and the optical component; when the distance between the measured eye and the optical component is slightly displaced, the imaging distance of the collimating light path device on the image sensor is slightly displaced, the non-collimating light path device on the image sensor can be greatly displaced and out-of-focus, and just when the distance between the curvature measuring device and the cornea of the eye is changed, the imaging sizes and the imaging states of the two light path systems on the image sensor are different, when the center of the circular ring of the light source in the graph 1 and the graph 2 is superposed with the center of the cross of the screen, the pupil center of the measured eye is superposed with the optical axis of the optical system, and when the circular ring is at the clearest position, the measured eye is just located at the focal length position, and the curvature of the cornea center can be measured.

The Meier ring view window plate 6 is installed on the Meier ring base 4 through the Meier ring end cover 7, the optical filter 9 is arranged between the Meier ring view window plate 6 and the non-collimation light path device, when the Meier ring view window plate 6 is installed, the optical filter 9 is pressed on the Meier ring base 4, the Meier ring view window plate 6 is axially limited through the Meier ring end cover 7, and finally the Meier ring end cover 7 is locked on the Meier ring base 4 through the screw 5.

In addition to the above embodiments, as a further preferable mode, the main imaging optical path device includes a first light source, a reflector 26, a lens 25 and a filter 27, and light emitted from the first light source is reflected by the reflector 26 and passes through the filter 27. The light that first light source shines is reflected by first speculum 26 behind filter plate 27, carries out the gathering of light through lens 25 again, has guaranteed that the light that is launched by first light source can focus on the focus, and can be convenient for arrange the position of first light source according to the actual application condition through first speculum 26 reflection light.

On the basis of the above embodiment, as a further preferable option, the collimated light path device includes two second light sources 13, two first small-hole diaphragm pieces 24, two alignment collimating objective lenses 23 and two alignment filter plates 22, one second light source 13 corresponds to one first small-hole diaphragm piece 24, corresponds to one alignment collimating objective lens 23 and corresponds to one alignment filter plate 22, the first small-hole diaphragm piece 24 is disposed between the corresponding second light source 13 and the corresponding alignment collimating objective lens 23, the alignment filter plate 22 is disposed on the corresponding first small-hole diaphragm piece 24, the second light source 13, the first small-hole diaphragm piece 24, the alignment collimating objective lens 23 and the alignment filter plate 22 are all mounted on the meier ring base 4 through alignment mounting components, and collimation through holes corresponding to the two second light sources 13 are disposed on the plate surface of the meier ring viewing window plate 6.

The two second light sources 13 are both LED lamps, and light rays emitted by the second light sources 13 pass through the corresponding alignment filter plate 22, then pass through the corresponding pinhole diaphragm, and then irradiate on a focus through the corresponding alignment collimator objective 23. The mounting assembly comprises a collimation alignment lighting sleeve 19, a collimation alignment lamp holder 20 and a screw 17, the collimation alignment lighting sleeve 19 is mounted on the collimation alignment lamp holder 20, and the second light source 13 is arranged in the collimation alignment lighting sleeve 19. The periphery of the collimation alignment lighting sleeve 19 just contacts the inner end face of the collimation through hole, the collimation alignment lighting sleeve 19 is installed on the Meier ring base 4 through the screw 17, the top face of the collimation alignment lighting sleeve 19 is designed to be oval, and after the collimation alignment lighting sleeve 19 is fixed, the oval face just coincides with the collimation through hole of the Meier ring view window plate 6 at the moment, and then accurate positioning is formed.

On the basis of the above embodiment, it is further preferable that the non-collimated light path device includes a double annular light source, and a double annular through hole corresponding to the double annular light source is provided on the panel surface of the mell ring window panel 6. The structure type of the double-ring light source can be a ring-shaped lamp, and can also be a structure that a plurality of lamps are arranged to be ring-shaped, the irradiation mode of the double-ring light source is scattering, the emitted light passes through the double-ring through hole on the Meier ring viewing window plate 6 after being filtered by the optical filter 9, the double-ring through hole comprises an outer ring through hole and an inner ring through hole, the inner ring through hole is a ring-shaped through hole, the outer ring through hole comprises two arc-shaped holes with opposite openings, and the arrangement position of the quasi-straight through hole is arranged between the end parts of the two arc-shaped holes.

The window sleeve 10 arranged in the center of the Meier ring base 4 is beneficial to the passing of the main imaging light path on one hand, and also isolates the light of the main imaging light path from the light of the double-ring light source on the other hand, so that the light interference of the light path is avoided.

On the basis of the above embodiments, it is further preferable that the dual annular light source is a lamp cluster arranged in a dual annular arrangement. The lamp cluster of two ring arrangements corresponds with the position of two ring shape through-holes, and the lamp cluster 14 of inner ring is the LED lamp of ring shape arrangement, and the lamp cluster 12 of outer loop is the LED lamp of arc arrangement that sets up with two arc holes correspondences.

In addition to the above-described embodiments, it is further preferable that the corneal peripheral curvature measuring mechanism includes an outer light source system provided along the outer edge of the meier ring base 4 in a convex manner and an inner light source system provided along the circumferential direction of the main body of the meier ring base 4, and both the outer light source system and the inner light source system are signal-connected to the image sensor. The external light source system is distributed around the Meier ring base 4 in a point shape, the internal light source system is distributed on the main body of the Meier ring base 4 in a point shape, and a display hole corresponding to the internal light source system is arranged on the optical filter 9.

On the basis of the above embodiment, as a further preferable mode, the external light source system includes four third light sources 18, four mounting brackets 3, four second aperture diaphragm sheets 21, and four objective lenses 2, one third light source 18 corresponds to one mounting bracket 3, corresponds to one second aperture diaphragm sheet 21, and corresponds to one objective lens 2, the second aperture diaphragm sheet 21 is disposed between the corresponding third light source 18 and the corresponding objective lens 2, the third light source 18 is mounted on the edge of the meier ring base 4 through the corresponding mounting bracket 3, all the mounting brackets 3 are respectively disposed around the meier ring base 4, and the illumination focuses of the third light source 18 and the main imaging light path device coincide with the illumination focuses of the collimating light path device and the main imaging light path device. Four bulges are respectively arranged on the periphery of the Meier ring base 4 and are used for being connected with the mounting bracket 3, and the connection mode can be welding or screw connection. The third light source 18 is an LCD lamp and an aperture plate is arranged between the objective lens 2 and the third light source 18. After the four third light sources 18 are installed, the irradiation directions of the four third light sources 18 are all toward the focal point.

The mounting bracket 3 is designed in a special shape according to the included angle between the center of the corneal peripheral curvature measuring light path and the center of the corneal central curvature measuring light path, the LCD lamp can be just clamped into the positioning hole groove on the mounting bracket 3, and the mounting bracket 3 is mounted on four bulges of the mounting bracket 3 around the Meier ring base 4 through screws 16.

On the basis of the above embodiment, as a further preferred option, the internal light source system includes four lamp beads 11 that are uniformly distributed along the main body circumference of the meier ring base 4, all the lamp beads 11 are sequentially lighted according to a preset sequence, and display holes are provided on the meier ring window plate 6 at positions corresponding to all the lamp beads 11. The lamp beads 11 are observation LED lamps, 4 installation holes for observing the LED lamps are symmetrically designed on the upper, lower, left and right sides of the outer circular ring of the main body of the Meier ring base 4, the observation LED lamps do not participate in corneal curvature measurement calculation, and the observation LED lamps and a double-ring light source are structurally distinguished according to a certain light-emitting angle and position, so that the installation holes in the Meier ring base 4 are designed into a four-side prismoid shape, the observation LED lamps are welded on the Meier ring circuit board 1, and after the Meier ring circuit board 1 is installed on the Meier ring base 4101 and is lightened to observe the LED lamps, light rays can just be emitted from four display holes on the circumference of the Meier ring vision board 6, so that observation of a detected human eye is facilitated. The meyer ring base 4 is connected with the meyer ring circuit board 1 through a mounting screw 15.

On the basis of the above embodiment, as a further preferable mode, a limit groove is provided on the front end face of the meier ring base 4, a limit protrusion 8 which is correspondingly clamped into the limit groove is provided on the meier ring viewing window plate 6, and after the limit protrusion 8 of the meier ring viewing window plate 6 is clamped into the limit groove, the visual target on the meier ring viewing window plate 6 is just matched with the measurement area of the measurement optical path, so that the positioning is accurate, and the measurement precision is ensured.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The present invention provides a device of Meyer ring structure for corneal curvature measurement. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (10)

1. A keratometry meyer ring configuration device comprising: the cornea measuring device comprises a Meier ring base (4), a cornea peripheral curvature measuring mechanism and a cornea central curvature measuring mechanism, wherein the cornea central curvature measuring mechanism is arranged in the middle of the Meier ring base (4), and the cornea peripheral curvature measuring mechanism is arranged along the edge of the Meier ring base (4).

2. The Meyer ring structure device for corneal curvature measurement according to claim 1, wherein the corneal central curvature measuring mechanism comprises a Meyer ring window plate (6), an image sensor, a main imaging optical path device, a collimating optical path device and a non-collimating optical path device, the main imaging optical path device is disposed at the center of the Meyer ring base (4), the Meyer ring window plate (6) is disposed coaxially with the Meyer ring base (4), the non-collimating optical path device is disposed along the circumferential direction of the Meyer ring window plate (6), the collimating optical path device is disposed at two sides of the main imaging optical path device, and the main imaging optical path device, the collimating optical path device and the non-collimating optical path device are in signal connection with the image sensor.

3. The Meyer ring structure device for keratometry as claimed in claim 2, wherein the primary imaging optical path device comprises a first light source, a reflector (26), a lens (25) and a filter (27), and light emitted from the first light source is reflected by the reflector (26) and passes through the filter (27).

4. The Meyer ring structure device for corneal curvature measurement according to claim 2, wherein the collimating optical path device comprises two second light sources (13), two first small hole diaphragm sheets (24), two alignment collimating objective lenses (23) and two alignment filter plates (22), one second light source (13) corresponds to one first small hole diaphragm sheet (24), one alignment collimating objective lens (23) and one alignment filter plate (22), the first small hole diaphragm sheet (24) is disposed between the corresponding second light source (13) and the corresponding alignment collimating objective lens (23), the alignment filter plate (22) is disposed on the corresponding first small hole diaphragm sheet (24), and the second light source (13), the first small hole diaphragm sheet (24), the alignment collimating objective lens (23) and the alignment filter plate (22) are mounted on the Meyer ring base (4) through alignment and alignment mounting components, and collimation through holes respectively corresponding to the two second light sources (13) are arranged on the surface of the Mylar ring view window plate (6).

5. A keratometry mylar ring configuration as in claim 2, wherein said non-collimated optical path means includes a double annular light source, and wherein said mylar window plate (6) has a plate surface provided with a double annular through hole corresponding to said double annular light source.

6. The keratometry meyer ring configuration device as recited in claim 5, wherein said dual annular light sources are lamp clusters arranged in a dual annular arrangement.

7. The keratometry meyer ring configuration device as claimed in claim 2, wherein the corneal peripheral curvature measuring mechanism comprises an external light source system disposed along an outer edge of the meyer ring base (4) in a convex manner and an internal light source system disposed along a circumferential direction of a main body of the meyer ring base (4), wherein the external light source system and the internal light source system are both in signal connection with the image sensor.

8. The Meyer ring structure device for corneal curvature measurement according to claim 7, wherein the external light source system comprises four third light sources (18), four mounting brackets (3), four second aperture pieces (21) and four objective lenses (2), one third light source (18) corresponds to one mounting bracket (3), one second aperture piece (21) and one objective lens (2), the second aperture pieces (21) are disposed between the corresponding third light source (18) and the corresponding objective lens (2), the third light source (18) is mounted on the edge of the Meyer ring base (4) through the corresponding mounting bracket (3), all the mounting brackets (3) are disposed around the Meyer ring base (4), and the illumination focus of the third light source (18) and the main imaging light path device and the illumination focus of the collimation light path device and the main imaging light path device are disposed around the Meyer ring base (4), respectively The focal points coincide.

9. The device as claimed in claim 7, wherein the internal light source system comprises four light beads (11) uniformly distributed along the circumference of the main body of the meier ring base (4), all the light beads (11) are sequentially lighted in a preset sequence, and the meier ring window plate (6) is provided with display holes corresponding to the positions of all the light beads (11).

10. The keratometry michael ring structure device as claimed in any of claims 2 to 9, wherein a retaining groove is provided on the front end face of the michael ring base (4), and a retaining protrusion (8) is provided on the michael ring window plate (6) to be correspondingly engaged in the retaining groove.

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