CN211911569U - Pupil measuring device - Google Patents

Abstract

The utility model discloses a pupil measuring device, it does not include lens, and includes: a housing having a cavity therein, one end of the cavity being open and the other end being closed; the luminous piece is fixed in the cavity of the shell close to the closed end; a light transmissive member secured within the cavity of the housing proximate the open end; the light-transmitting part is provided with a plurality of concentric arc holes which are arranged at specific intervals and have different sizes, the light emitted by the light-emitting part penetrates through the arc holes to form spaced arc light beams, and the spaced arc light beams are projected to the pupil to be measured at a specific distance to measure the size of the pupil to be measured. The utility model discloses can reduce device length, again can the snap judgments and reading, realize being surveyed the rapid survey of the size of pupil.

Description

Pupil measuring device

Technical Field

The utility model relates to a measuring device, concretely relates to pupil measuring device.

Background

The pupil is positioned in the human eye, the size of the pupil can be contracted and adjusted, and the diameter is 2 mm-6 mm. The pupil acts as an aperture stop in the optical system and influences the magnitude of retinal aberrations by enlarging and reducing the diameter of the pupil to adjust the amount of light entering the eye. The size of the pupil is controlled by both the sphincter pupillae innervated by the oculomotor nerves and the mydriasis muscularis pupillae innervated by the sympathetic nerves, so that lesions anywhere in the afferent and efferent nerve pathways affect the pupil. The pupil is closely associated with the corresponding nerve.

Many diseases occur with changes in pupil size or changes in pupil motility, and diagnosis of certain diseases can be made based on the state of the pupil, such as size. In the field of ophthalmology, doctors often diagnose ophthalmic diseases, such as glaucoma, cataract, iridocyclitis, etc., based on pupil status. In the field of neurology and surgery, doctors often diagnose diseases such as optic neuropathy, optic tract disease, and the like, based on pupil status.

At present, the pupil diameter measurement methods mainly include the following methods, the first method is to adopt a simple ruler to measure or a semicircular plate ruler to measure, arrange the ruler or the semicircular plate ruler at a position which is parallel to the central line of the measured pupil, and then read according to the scales of the ruler or the semicircular plate ruler. The measuring method is long in time consumption and low in efficiency, and a measurer is difficult to accurately align the straight ruler or the semicircular plate ruler with the central line of the pupil to be measured. The measurement result is not accurate and reliable enough.

The second method is a picture comparison method, wherein a measurer compares a pupil comparison card with different dot diameters with the pupil of the measured person, finds out a dot closest to the pupil of the measured person, and the diameter of the found dot represents the size of the measured pupil. The method depends on subjective judgment of the testee, and because the subjective judgment standards of each person are different, the subjective judgment result often has larger error with the actual situation, the reliability is not high, and the actual data cannot be represented.

The third is to adopt digital image technology, measure by shooting the pupil to be measured and combining computer analysis software, this kind of instrument is generally expensive, bulky, inconvenient to carry.

Chinese patent document CN204813794U discloses a pupil measuring pen, which is complex in structure and troublesome to operate, and the measurement result needs to be calculated according to the reading and the structural parameters of the pupil measuring pen itself. In other words, the user can only obtain indirect measurement data when using the pupil measuring pen, and the final result cannot be directly obtained, which is very inconvenient for the user. In addition, the mode of using the pupil measuring pen to measure is time-consuming and inefficient.

Chinese patent document CN201905870U discloses a pen-type pupil measuring torch, in which a measuring scale is disposed on a housing near a light source end, and a scale line of the measuring scale is parallel to a light ray emitted from a light source. During use, an operator measures and reads the result from the scale on the measurement scale and the light projected by the light source. The measurement mode of the pen-type pupil measurement flashlight needs subjective judgment of an operator, accurate reading cannot be achieved, and the error is large.

Chinese patent document CN107049230A discloses a pupil measuring device, which includes a lens disposed on a fixing device, and a light-emitting element located at a focal point of the lens to project light emitted from the light-emitting element onto the lens and refract the light to form parallel light. The presence of the lens makes the length of its measuring device longer; in the embodiment and the attached drawings, straight strip-shaped through holes are adopted, the shapes and the sizes of the through holes are consistent, and the reading is difficult to judge quickly.

SUMMERY OF THE UTILITY MODEL

In view of this, in order to solve the above technical problem, the present invention provides a pupil measuring device, which can reduce the length of the device and can read the pupil quickly.

The adopted technical scheme is as follows:

a pupil measuring device, comprising, without a lens:

a housing having a cavity therein, one end of the cavity being open and the other end being closed;

the luminous piece is fixed in the cavity of the shell close to the closed end;

a light transmissive member secured within the cavity of the housing proximate the open end; the light-transmitting part is provided with a plurality of concentric arc holes which are arranged at specific intervals and have different sizes, the light emitted by the light-emitting part penetrates through the arc holes to form spaced arc light beams, and the spaced arc light beams are projected to the pupil to be measured at a specific distance to measure the size of the pupil to be measured.

Further, the arc hole is the major arc hole that is greater than the semicircle.

Further, the central angles of each major arc shaped hole are equal.

Further, a plurality of major arc hole has coaxial symmetry.

Further, the central angles of the arc-shaped holes of each major arc are not equal.

Further, a plurality of major arc hole outwards increase in proper order from inside.

Furthermore, a plurality of major arc hole from inside outwards according to corresponding central angle gradient increase gradually.

Furthermore, a plurality of major arc hole from inside outwards according to corresponding central angle gradient increase progressively, and have coaxial symmetry.

Further, the closed end of the housing is detachably screwed closed by a cap.

Further, a battery is fixed on the cover.

Compared with the prior art of CN107049230A, the beneficial effects of the utility model reside in that:

the pupil measuring device does not comprise a lens, and the light emitted by the light-emitting component directly penetrates through the arc-shaped hole to form spaced arc-shaped light beams, and the spaced arc-shaped light beams are projected to the pupil to be measured at a specific distance to measure the size of the pupil to be measured. The structure is simplified because the lens is not included, and the length of the pupil measuring device can be shortened; because concentric arc holes with different sizes are adopted, the size of the pupil to be measured can be measured from each different arc light beam for quick reading. And for straight shape hole, the shape of arc light beam is closer to the shape of pupil, judges and measures the size of pupil more easily and fast, realizes the quick measurement of the size of the pupil of quilt survey.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and 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 these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram illustrating a disassembled cover and a housing of the pupil measuring device in embodiment 1.

Fig. 2 is a light ray diagram of the pupil measuring device of embodiment 1.

Fig. 3 is a schematic structural view of a light-transmitting member of the pupil measurement device of embodiment 1.

Fig. 4 is a schematic structural view of a light-transmitting member of the pupil measurement device of embodiment 2.

Fig. 5 is a schematic structural view of a light-transmitting member of the pupil measurement device of embodiment 3.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only preferred embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

Referring to fig. 1 to 3, a pupil measuring device does not include a lens, but includes a housing 1, a light emitting member 2, and a light transmitting member 3.

A housing 1 having a cavity 11 therein, the cavity 11 having one end open and the other end closed; a cylindrical housing may be preferably used. The closed end of the housing may be releasably screwed closed with a cap 4. The open end is preferably a tapered cavity.

And a luminous element 2 fixed in the cavity 11 of the casing 1 near the closed end. The luminous piece can be conveniently replaced or maintained by screwing or unscrewing the cover. The light emitting member may be a point light source, such as a bulb or an LED lamp; but may also be a divergent light source. The light emitting component can be selected from components emitting natural light, and can also be selected from components emitting red light, yellow light, green light and the like which have less stimulation to human eyes. A battery (not shown) may be attached to the cover for powering the light emitter to emit light. The advantage of fastening the battery to the cover is that the light emitter can be turned on or off by screwing or unscrewing. Specifically, when screwing, the positive and negative electrodes of the battery are in contact with the positive and negative electrodes of the luminous element; when the battery is unscrewed, the positive and negative electrodes of the battery are separated from the positive and negative electrodes of the luminous piece. Of course, it is also possible to operate with a direct connection to an external power source, but this is not as convenient as a battery.

A light-transmitting member 3 fixed in a cavity of the housing 1 near the open end; the light-transmitting part is provided with a plurality of concentric arc holes 31 which are arranged at specific intervals and have different sizes, the light emitted by the light-emitting part penetrates through the arc holes to form spaced arc light beams, and the spaced arc light beams are projected to the pupil to be measured at a specific distance to measure the size of the pupil to be measured.

In the above, the "specific interval" means that the interval between any two adjacent arc-shaped holes is known and fixed, so that a scale can be formed invisibly, for example, the first arc-shaped hole represents 1.0 mm; the second arc hole represents 1.5mm, the third arc hole represents 2.0mm, and the scale can be formed by increasing progressively in turn and analogizing, and the rapid judgment can be carried out according to different arc light beams.

By "specific distance" it is meant that the distance between the pupil under test and the pupillometry device is known and fixed, and that the specific distance is such that the size of the arc beam projected onto the pupil under test is the size of the actual pupil that can be measured. This allows the specific distance to be calculated from a simple mathematical relationship of the projections.

"plurality" means more than two. The number may be set as desired.

When the device is used, the head of a tested person is still, namely the tested pupil is still, the pupil measuring device is projected to the tested pupil at a specific distance, and the size of the tested pupil is measured according to the arc light beams with different sizes on the tested pupil.

The structure is simplified because the lens is not included, and the length of the pupil measuring device can be shortened; because concentric arc holes with different sizes are adopted, the size of the pupil to be measured can be measured from each different arc light beam for quick reading. And compared with a straight strip-shaped hole, the shape of the arc-shaped light beam is closer to the shape of the pupil, so that the size of the pupil can be judged and measured more easily and quickly.

For better rapid determination and measurement, referring to fig. 3, the arc hole 31 of the light-transmitting member 3 is preferably a major arc hole 31 larger than a semicircle in the present embodiment; the central angles of the arc-shaped holes of the major arcs are equal; the plurality of major arc arcuate apertures have coaxial 32 symmetry.

Example 2

Referring to embodiment 1, this embodiment is different from embodiment 1 in that, referring to fig. 4, the central angles of each of the major arc shaped holes 31 of the light-transmitting member 3 are not equal. A plurality of major arc hole outwards increase in proper order from inside, and the central angle gradient that outwards increases according to corresponding from inside increases gradually.

Example 3

Referring to embodiment 2, this embodiment is different from embodiment 2 in that, referring to fig. 5, a plurality of major arc shaped holes 31 of the light-transmitting member 3 are sequentially increased from inside to outside, are gradually increased from inside to outside according to corresponding central angle gradients, and have coaxial 32 symmetry.

The above detailed description is only for the purpose of illustrating the practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A pupil measuring device, comprising, in addition to a lens:

a housing having a cavity therein, one end of the cavity being open and the other end being closed;

the luminous piece is fixed in the cavity of the shell close to the closed end;

a light transmissive member secured within the cavity of the housing proximate the open end; the light-transmitting part is provided with a plurality of concentric arc holes which are arranged at specific intervals and have different sizes, the light rays emitted by the light-emitting part penetrate through the arc holes to form spaced arc light beams, and the spaced arc light beams are projected to the pupil to be measured at a specific distance to measure the size of the pupil to be measured; the specific interval means that the distance between any two adjacent arc-shaped holes is known and fixed; the specific distance means that the distance between the measured pupil and the pupil measuring device is known and fixed.

2. The pupil measurement device of claim 1 wherein the arcuate aperture is a major arc arcuate aperture that is larger than a semicircle.

3. The pupil measurement device of claim 2 wherein the central angle of each major arc arcuate aperture is equal.

4. The pupillometry device of claim 3, wherein the plurality of major arc arcuate apertures have coaxial symmetry.

5. The pupil measurement device of claim 2 wherein the central angles of each major arc aperture are not equal.

6. The pupil measurement device of claim 5, wherein the plurality of major arc apertures increase sequentially from inside to outside.

7. The pupillometry device of claim 6, wherein the plurality of major arc arcuate apertures increase in gradient from inside to outside according to the corresponding central angle.

8. The pupil measurement device of claim 7, wherein the plurality of major arc apertures have coaxial symmetry according to corresponding central angles from inside to outside.

9. The pupil measurement device of claim 1 wherein the closed end of the housing is removably screwed closed with a cap.

10. The pupil measurement device of claim 9 wherein a battery is secured to the cover.

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