CN220876745U - Auxiliary measuring device for cornea shaping mirror test and matching and digital slit lamp microscope - Google Patents

Abstract

The utility model relates to an auxiliary measuring device for cornea shaping mirror test and a digital slit lamp microscope, wherein the auxiliary measuring device is arranged on a microscope imaging device and comprises: the first lighting lamp is used for emitting a lighting beam; the scale plate is provided with scale marks, can be imaged in the microscope imaging device and is used for assisting in measuring parameters of cornea shaping lens test matching; a collimator lens for collimating the light emitted from the scale plate into parallel light and projecting the parallel light into a microscope imaging device; and the first beam splitting prism is arranged in the microscope imaging device and is used for introducing the image of the scale plate into a main light path of the microscope imaging device. The auxiliary measuring device is provided with the scale plate, and scale marks on the scale plate can be imaged in the microscope imaging device, so that the auxiliary measuring device can assist in measuring various parameters required by cornea shaping mirror test and matching, and the measuring precision and the test and matching efficiency of test and matching parameters are improved.

Description

Auxiliary measuring device for cornea shaping mirror test and matching and digital slit lamp microscope

Technical Field

The utility model relates to the technical field of medical microscopes, in particular to an auxiliary measuring device for cornea shaping microscope fitting and a digital slit lamp microscope.

Background

Slit-lamp microscopy is an essential important instrument for ophthalmic examination. The slit-lamp microscope is composed of an illumination system and a microscopic imaging system, so that not only can the superficial lesions be observed clearly, but also the focal point and the light source width can be adjusted to be narrow, and the optical section can be made, so that the lesions of deep tissues can be clearly shown.

Chinese patent document CN110927946B discloses a high resolution digital slit lamp microscope comprising a common front objective a, a diaphragm, a galilean telescope B, a beam splitting prism C, and a photographic objective D. The front objective is a basic objective of the whole system, and the axis of the front objective is arranged eccentrically in the longitudinal direction and is used for transmitting incident light into parallel light; the Galilean telescope B is used for realizing two-gear zooming; the beam splitting prism is placed in the parallel light path behind the Galilean telescope for splitting light, and is connected with the built-in photographic objective lens and CCD for observing, photographing and other functions. The slit-lamp microscope has the following defects: the digital slit lamp microscope can only display the image of the cornea shaping lens worn on the front surface of the cornea of human eyes, and cannot accurately measure various parameters of the cornea shaping lens, so that doctors need to rely on self experience to visually estimate various parameters, the cornea shaping lens has lower fitting efficiency and lower success rate.

Therefore, it is needed to provide an auxiliary measuring device and a digital slit lamp microscope capable of accurately measuring the cornea shaping lens fitting parameters.

Disclosure of utility model

First, the technical problem to be solved

In view of the above-mentioned shortcomings and disadvantages of the prior art, the utility model provides an auxiliary measuring device for cornea shaping lens fitting and a digital slit lamp microscope, which solve the technical problem that the existing digital slit lamp microscope cannot accurately measure the cornea shaping lens fitting parameters.

(II) technical scheme

In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises the following steps:

In a first aspect, an embodiment of the present utility model provides an auxiliary measurement device for cornea shaping lens, where the auxiliary measurement device is installed on a microscope imaging device of a digital slit lamp microscope, and a main optical path of the auxiliary measurement device is perpendicular to a main optical path of the microscope imaging device, and the auxiliary measurement device sequentially includes, along an incident direction of a light beam:

The first lighting lamp is used for emitting a lighting beam;

The scale plate is provided with scale marks and can be imaged in the microscope imaging device and is used for assisting in measuring parameters of the cornea shaping mirror test;

a collimator lens for collimating the light emitted from the scale plate into parallel light and projecting the parallel light into the microscope imaging device;

And the first beam splitting prism is arranged in the microscope imaging device and is used for introducing the image of the scale plate into a main light path of the microscope imaging device.

Optionally, cross-shaped scale marks or rice-shaped scale marks are engraved on the scale plate.

Optionally, the minimum scale on the scale plate is 1dmm, and the diameter of the scale plate is 9-15mm.

Optionally, the collimating lens is a plano-convex lens or a biconvex lens, the diameter of the collimating lens is 20mm, and the focal length is 10-30mm.

In a second aspect, embodiments of the present utility model further provide a digital slit lamp microscope for corneal shaping lens assembly, comprising: illumination device, microscope image device and auxiliary measuring device above-mentioned.

Optionally, the lighting device comprises: the second lighting lamp, the condensing lens, the projection lens and the beam splitting flat sheet.

Optionally, the microscope imaging device includes, in order from an object side to an image side: front objective lens, zoom optical lens group and ocular lens;

The first beam splitter prism is arranged between the front objective lens and the variable magnification optical lens group.

Optionally, the microscope imaging device further comprises: a second beam splitter prism, an imaging lens, and a digital camera;

The second beam splitting prism is arranged between the variable magnification optical lens group and the ocular lens and is used for reflecting part of the light beams of the main light path to the imaging lens, and the imaging lens images the reflected light beams on a CCD target surface of the digital camera.

(III) beneficial effects

The beneficial effects of the utility model are as follows: the auxiliary measuring device for cornea shaping mirror fitting of the utility model comprises: the first lighting lamp is used for emitting a lighting beam; the scale plate is provided with scale marks, can be imaged in the microscope imaging device and is used for assisting in measuring parameters of cornea shaping lens test matching; a collimator lens for collimating the light emitted from the scale plate into parallel light and projecting the parallel light into a microscope imaging device; the first beam splitting prism is arranged in the microscope imaging device and is used for introducing the image of the scale plate into a main light path of the microscope imaging device, compared with the prior art, the first illuminating lamp emits illuminating light beams to illuminate the scale plate, the collimating mirror collimates the light emitted by the scale plate into parallel light and projects the parallel light onto the first beam splitting prism in the microscope imaging device, and the first beam splitting prism is used for introducing the image of the scale plate into the main light path of the microscope imaging device of the digital slit lamp microscope, so that the scale plate, the measured human eyes and the cornea shaping mirror are all imaged in eyes of doctors. And then, a doctor can accurately measure a plurality of parameters of cornea shaping mirror test matching through scale marks on the scale plate, so that the technical effects of improving the measurement accuracy and test matching efficiency are achieved.

Drawings

FIG. 1 is a schematic view of an optical structure of an auxiliary measuring device according to an embodiment 1 of the present utility model;

FIG. 2 is a schematic diagram of the optical structure of example 1 of the digital slit-lamp microscope of the present utility model;

FIG. 3 is a schematic view of the scale plate of FIG. 2;

FIG. 4 is a schematic representation of the scale plate, cornea shaping mirror, on the cornea of a human eye, shown in the microscope imaging apparatus of FIG. 2;

Fig. 5 is a schematic view of a scale plate of an auxiliary measuring device embodiment 2 of the present utility model.

[ Reference numerals description ]

1: The human eye to be tested; 2: a second illumination lamp; 3: a condenser; 4: a projection mirror; 5: splitting a flat piece; 6: a front objective lens; 7: a variable magnification optical lens group; 8: a barrel lens; 9: an eyepiece; 10: a first beam-splitting prism; 11: a collimator lens; 12: a scale plate; 13: a first illumination lamp; 14: a second light splitting prism; 15: an imaging lens; 16: a digital camera; 17: a cornea of a human eye; 18: a cornea shaping mirror; 19: a center of cornea of the human eye; 20: the cornea shapes the mirror center.

Detailed Description

The utility model will be better explained by the following detailed description of the embodiments with reference to the drawings.

Example 1:

as shown in fig. 1, fig. 1 shows an optical structure schematic diagram of an auxiliary measuring device for cornea shaping lens fitting of the present embodiment, the auxiliary measuring device of the present embodiment is mounted on a microscope imaging device of a digital slit lamp microscope, and a main optical path of the auxiliary measuring device is perpendicular to a main optical path of the microscope imaging device. The auxiliary measuring device of this embodiment includes in order along the incident direction of light beam:

a first illumination lamp 13 for emitting an illumination beam;

A scale plate 12 on which scale marks are provided, capable of being imaged in the microscope imaging device, for assisting in measuring parameters of the cornea shaping lens 18's prescription;

A collimator lens 11 for collimating the light emitted from the scale plate 12 into parallel light and projecting the parallel light into the microscope imaging device;

A first beam splitting prism 10, disposed within the microscope imaging device, for introducing an image of the scale plate 12 into the main optical path of the microscope imaging device.

When the light source is used, the first illuminating lamp 13 emits illuminating light beams to illuminate the scale plate 12, the collimating lens 11 collimates light emitted by the scale plate 12 into parallel light, the parallel light is projected onto the first light splitting prism 10 in the microscope imaging device, the first light splitting prism 10 guides images of the scale plate 12 into a main light path of the microscope imaging device, and therefore the scale plate 12, the measured human eye 1 and the cornea shaping lens are all imaged in eyes of a doctor. Then, a doctor can accurately measure a plurality of parameters of the cornea shaping lens test and match through the scale marks on the scale plate 12, thereby achieving the effects of improving the measurement accuracy and the test and match efficiency.

Further, the collimator lens 11 is a plano-convex lens or a biconvex lens, and the diameter of the collimator lens 11 is 20mm, and the focal length is 10-30mm.

As shown in fig. 2, fig. 2 shows an optical structure schematic diagram of the digital slit-lamp microscope of the present embodiment. The digital slit lamp microscope of this embodiment includes: illumination device, microscope image device and auxiliary measuring device above-mentioned.

Specifically, the lighting device includes: a second illumination lamp 2, a condenser lens 3, a projection lens 4 and a beam splitting flat sheet 5. When in use, the second illuminating lamp 2 generates a light beam with uniform illumination, and the light beam sequentially passes through the condenser lens 3 and the projection lens 4 to reach the light splitting flat sheet 5, and is reflected to the tested human eye 1 by the light splitting flat sheet 5. When the light beam passes through the detected human eye 1, only human eye tissues through which the light beam passes are illuminated, the part is clearly visible, tissues not through which the light beam passes are still dark areas, so that obvious contrast phenomena occur between the illumination areas and surrounding areas, light reflected by the human eye is transmitted into a light path of a microscopic imaging device through the light splitting flat sheet 5, and finally, the details of the detected human eye 1 can be clearly observed through the microscopic imaging device.

Further, the microscope imaging device includes, in order from the object side to the image side: front objective lens 6, variable magnification optical lens group 7, tube lens 8, eyepiece 9. The tested human eye 1 is positioned on the object focal plane of the front objective lens 6, the light beam emitted by the second illuminating lamp 2 is reflected to the front objective lens 6 through the tested human eye 1, the front objective lens 6 emits a first parallel light beam, the first parallel light beam is still parallel light after being amplified by the variable magnification optical lens group 7, then the first parallel light beam is imaged on the object focal plane of the ocular lens 9 through the lens cone lens 8, and finally the first parallel light beam is amplified again by the ocular lens 9. When in use, the first illuminating lamp 13 generates an illuminating beam to illuminate the scale plate 12, and the light emitted by the illuminated scale plate 12 is collimated by the collimator lens 11 and then becomes a second parallel beam, and the second parallel beam is reflected by the first beam splitter prism 10 and enters a main light path in the microscope imaging device to be mixed with the first parallel beam emitted by the front objective lens 6. In addition, since the scale plate 12 is located outside the main optical path of the microscope imaging device, it is easy to replace, and the normal operation of the lens group inside the microscope imaging device is not affected.

As shown in fig. 3, fig. 3 shows a schematic view of the scale plate of the present embodiment, in which cross-shaped graduation marks are engraved on the scale plate 12 for measuring parameters of the cornea of a human eye and the cornea shaping mirror in the horizontal and vertical directions. Further, the minimum scale on the scale plate 12 is 1dmm, and the diameter of the scale plate 12 is 9-15mm. When the light-emitting device is used, light rays emitted by the scale plate 12 sequentially pass through the collimating lens 11 and the first beam splitting prism 10, enter a main light path inside the microscope imaging device, and finally reach an object focal plane of the ocular 9 through the zoom optical lens group 7 and the lens cone lens 8, so that cross scale marks on the scale plate 12 are seen clearly by an observer.

As shown in fig. 4, fig. 4 shows a schematic representation of the scale plate and the cornea shaping lens on the cornea of the human eye, which is shown by the microscope imaging apparatus according to the embodiment, the scale plate 12 and the measured human eye 1 are both captured by the human eye, so that the cross scale lines on the scale plate 12 can assist in measuring parameters of the cornea 17 and the cornea shaping lens 18 of the human eye in the horizontal and vertical directions.

Specifically, parameters associated with the corneal shaping lens 18 prescription include: deviation of lens center positioning, lens mobility, lens tightness, lens diameter and tear layer thickness in each region in ideal fluorescent dyeing state. The measuring process of the lens center positioning deviation comprises the following steps: the wearer wears the cornea shaping lens 18 for a transient (i.e., blink) and then looks straight ahead, and the doctor observes whether the cornea center 19 and the cornea shaping lens center 20 of the human eye are concentric; if not, the horizontal and vertical offset between the cornea center 19 and the cornea shaping lens center 20 of the human eye is observed by means of the cross score lines on the scale plate 12, thereby deriving a deviation in lens center positioning. It should be noted that the lens center positioning deviation amount is required to be smaller than 0.5mm in the cornea shaping lens test. The measuring process of the activity of the lens comprises the following steps: the wearer looks straight ahead, gently pulls the lower eyelid, and the cornea shaping lens moves upwards after the instant of retardation is pulled by the upper eyelid, and then returns to the original position. The lens mobility can be obtained by observing the upward movement of the lower edge of the cornea shaping lens 18 by means of the cross score line on the scale plate 12. The lens has a suitable mobility of 1 to 1.5mm. The measuring process of the tightness of the lens comprises the following steps: the lower eyelid of the wearer is pulled open to allow the wearer to look upward, and the lower eyelid is pushed by the thumb to push the lower edge of the lens. The amount of lens tightness is obtained by observing the upward movement of the cornea shaping lens 18 and the speed of return by means of a cross score line on the scale plate 12. The thickness of the tear layer in each region in the ideal fluorescent staining state is measured by the following steps: and (3) dripping fluorescein into the human eye 1 to be measured, wherein the fluorescein is used for dyeing the tear layer, the tear layer is in a dark green bright ring of 360 degrees after being dyed, and the thickness of the tear layer can be obtained by measuring the width of the dark green bright ring by means of a cross score line on the scale plate 12.

Further, the microscope imaging device further includes: a second dichroic prism 14, an imaging lens 15, and a digital camera 16. The second beam splitting prism 14 is disposed between the variable magnification optical lens group 7 and the barrel lens 8, and the imaging lens 15 and the digital camera 16 are disposed outside the main optical path of the microscopic imaging device. In use, the second beam splitter prism 14 reflects part of the light beam on the main light path to the imaging lens 15 and images the light beam on the CCD target surface of the digital camera 16, and the digital camera 16 can store the photographed image in real time for subsequent processing.

The working procedure of the digital slit lamp microscope of the embodiment for cornea shaping lens test and matching is as follows: first, the second illumination lamp 2 generates an illumination beam, and the illumination beam sequentially passes through the condenser lens 3 and the projection lens 4 to reach the beam splitting flat sheet 5, and is reflected by the beam splitting flat sheet 5 to the human eye 1 to be measured. Then, the light beam emitted by the second illumination lamp 2 is reflected to the front objective lens 6 through the tested human eye 1, the front objective lens 6 emits a first parallel light beam, meanwhile, the first illumination lamp 13 illuminates the scale plate 12, the light beam emitted by the illuminated scale plate 12 is collimated by the collimating mirror 11 and becomes a second parallel light beam, and the second parallel light beam is reflected by the first beam splitting prism 10 and enters a main light path in the microscope imaging device to be mixed with the first parallel light beam. The mixed light beam is amplified by the variable magnification optical lens group 7, reflected by the second beam splitter prism 14 to the imaging lens 15, imaged on the CCD target surface of the digital camera 16, and the digital camera 16 shoots and stores the images of the tested human eye 1, the cornea shaping 18 and the scale plate 12 in real time. Finally, the image information is analyzed to obtain various fitting parameters of the cornea shaping lens 18.

Example 2:

As shown in fig. 5, fig. 5 shows a schematic view of a scale plate of an auxiliary measuring device of embodiment 2 of the present utility model, unlike embodiment 1, the scale plate 12 of this embodiment is engraved with a rice-shaped scale mark for measuring parameters of the cornea 17 and the cornea shaping mirror 18 of the human eye in horizontal, vertical and oblique orientations.

The rest of the same parts as those of embodiment 1 are not described here again.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.

In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the utility model.

Claims (8)

1. An auxiliary measuring device for cornea shaping mirror test and matching, which is characterized in that: the auxiliary measuring device is arranged on a microscope imaging device of the digital slit lamp microscope, a main light path of the auxiliary measuring device is perpendicular to a main light path of the microscope imaging device, and the auxiliary measuring device sequentially comprises:

A first illumination lamp (13) for emitting an illumination beam;

A scale plate (12) provided with scale marks capable of being imaged in the microscope imaging device for assisting in measuring parameters of the cornea shaping lens (18) fitting;

A collimator lens (11) for collimating light emitted from the scale plate (12) into parallel light and projecting the parallel light into the microscope imaging device;

A first beam splitting prism (10) disposed within the microscope imaging device for introducing an image of the scale plate (12) into a main optical path of the microscope imaging device.

2. The auxiliary measuring device of claim 1, wherein: the scale plate (12) is carved with cross scale marks or rice-shaped scale marks.

3. The auxiliary measuring device of claim 2, wherein: the minimum scale on the scale plate (12) is 1dmm, and the diameter of the scale plate is 9-15mm.

4. An auxiliary measuring device according to claim 3, wherein: the collimating lens (11) is a plano-convex lens or a biconvex lens, the diameter of the collimating lens (11) is 20mm, and the focal length is 10-30mm.

5. The digital slit lamp microscope for cornea shaping lens test is characterized in that: comprising the following steps: illumination device, microscopic imaging device and auxiliary measuring device according to any of claims 1-4.

6. The digital slit lamp microscope of claim 5, wherein: the lighting device includes: the second illuminating lamp (2), the condensing lens (3), the projection lens (4) and the beam splitting flat sheet (5).

7. The digital slit lamp microscope of claim 5, wherein: the microscope imaging device includes, in order from an object side to an image side: a front objective lens (6), a zoom optical lens group (7) and an ocular lens (9);

The first beam splitter prism (10) of the auxiliary measuring device is arranged between the front objective (6) and the variable magnification optical lens group (7).

8. The digital slit lamp microscope of claim 7, wherein: the microscope imaging device further includes: a second beam splitter prism (14), an imaging lens (15), and a digital camera (16);

The second beam splitting prism (14) is arranged between the zoom optical lens group (7) and the ocular lens (9) and is used for reflecting part of the light beam of the main light path to the imaging lens (15), and the imaging lens (15) images the reflected light beam on a CCD target surface of the digital camera (16).