CN113413130A

CN113413130A - Small-size optometry and eyesight tester of short main light path

Info

Publication number: CN113413130A
Application number: CN202110676463.XA
Authority: CN
Inventors: 陈奎
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2021-09-21

Abstract

The invention discloses a small optometry and optometry instrument with a short main light path, and relates to a small optometry device for subjective and objective inspection. The instrument comprises a main light path and three branch light paths, wherein the main light path is sequentially provided with a first spectroscope, a first convex lens, a second spectroscope, a third spectroscope and a wavefront sensor; the first spectroscope, the third convex lens, the pupil imaging camera and the first convex lens are fixed on a shell of a contact eye according to a light path structure, and the second convex lens, the second spectroscope, the fourth convex lens, the light source, the third spectroscope, the wavefront sensor, the fifth convex lens and the sighting mark display device are fixed on a movable shell according to the light path structure. The advantages are that: the main light path and the three branch light paths are reasonable in communication design, the main light path and the branch light paths are short, the parts are small and can be miniaturized, the handheld type eye-examination device can be manufactured, the handheld type eye-examination device is convenient to carry and use on site, and the eye-examination device is suitable for conducting objective and subjective condition examination on eyes in any places.

Description

Small-size optometry and eyesight tester of short main light path

Technical Field

The invention relates to the technical field of geometrical optical measurement for ophthalmology, in particular to a small optometry device for objective and subjective inspection.

Background

In recent years, with the use of electronic terminals becoming more and more common, not only the incidence of myopia of student groups is increasing, but also the age and the age of old people are advancing gradually, and the vision health problem has received wide attention from all the social circles. People can not reverse the myopia once the myopia occurs after knowing the vision related knowledge, and then only correct the ametropia but not treat the ametropia by wearing glasses or performing refractive surgery, and various sequelae caused by the ametropia are also inevitable along with the increase of the age. In the period of children, the eye using habit is kept to avoid the occurrence of ametropia, or correct corrective glasses are matched in time after the ametropia is found, so that the increase of the diopter number is effectively controlled, and the method is particularly important. Therefore, when the patient has blurred vision, it is necessary to distinguish the reason causing the symptoms as simple ametropia or non-ametropia (including amblyopia, fundus disease, etc.), and then take a distinct treatment method, so that the ametropia patient can be matched with the prescription, while the non-ametropia patient needs to be shunted to an ophthalmic clinic for more professional examination and treatment.

Currently, vision function tests are generally performed in professional vision centers or ophthalmologic hospitals, and the used tools comprise optometry equipment with various principles, which are operated by optometrists or doctors, are used for outpatient examination or optometry before prescription, and are generally not suitable for quick examination of large-batch crowds; and the equipment is large in size and high in price, and is difficult to be widely applied to the vast underdeveloped areas in China in a short time. In 2018, eight departments such as the department of education, the national health committee and the like jointly issue a comprehensive prevention and control implementation scheme for the myopia of children and teenagers, clear requirements are provided for the myopia rate control of the teenagers in the future 10 years in China, and then a screening specification for the myopia of the children and the teenagers is issued, and a method for quickly and simply distinguishing people who possibly suffer from the myopia from people who do not suffer from the myopia in healthy people by adopting visual inspection and a non-cycloplegic state is required. Therefore, the handheld optometry equipment which is compact in structure, low in price and intelligent in use is the best choice for quickly checking the ametropia of large-batch crowds.

In the prior art, patent CN 103654708A provides a handheld vision inspection device and method, but the vision inspection process of the handheld vision inspection device depends on the judgment and matching of a tested person, and the necessary objective inspection is lacked, so that the handheld vision inspection device is not beneficial to the inspection of non-ametropia vision decline such as amblyopia and the like; CN 107184178A, CN 109480764A provides a handheld objective optometry solution, but its technical implementation does not include a subjective vision examination function, and after optometry, it still needs complex and time-consuming insert optometry to obtain the corrected vision of the testee, so it is difficult to use in rapid screening optometry.

Disclosure of Invention

The invention aims to improve the cost performance of equipment by shortening and reasonably arranging the main optical path of equipment components, and miniaturize the device on the premise of integrating refraction measurement, refraction correction and vision inspection.

The structure of the invention is as follows:

the utility model provides a small-size optometry and eyesight test appearance of short main light path, includes a main light path and three branch light path, and this three branch light path communicates its characterized in that through spectroscope and main light path respectively: the main optical path is provided with a first spectroscope 3, a first convex lens 6, a second convex lens 7, a second spectroscope 8, a third spectroscope 11 and a wavefront sensor 13 in sequence from the first spectroscope 3 close to the eyes to the final wavefront sensor 13; wherein the first convex lens 6 and the second convex lens 7 form a 4f system structure;

the first light splitting lens 3, the third convex lens 4 and the pupil imaging camera 5 are sequentially arranged on the component of the first branch light path from the near side to the far side of the main light path;

the component of the second branch light path is provided with a second beam splitter 8, a fourth convex lens 9 and a light source 10 in sequence from the near to the far of the main light path;

the third light splitting mirror 11, the fifth convex lens 14 and the sighting mark display device 15 are sequentially arranged on the component of the third branch light path from the near to the far of the main light path;

the mechanical structure of each optical component is as follows:

the first spectroscope 3, the third convex lens 4, the pupil imaging camera 5 and the first convex lens 6 are fixed on the shell 100 of the contact eye according to an optical path structure, and the infrared light-emitting diode 2 is fixed on the front panel of the shell 100 of the contact eye;

the second convex lens 7, the second spectroscope 8, the fourth convex lens 9, the light source 10, the third spectroscope 11, the wavefront sensor 13, the fifth convex lens 14 and the sighting mark display device 15 are fixed on the movable shell 101 according to the light path structure;

the shell 100 of the contact eye is fixedly connected with the main shell 102, the movable shell 101 is slidably connected with the main shell 102, a movable adjusting knob 13 is arranged between the movable shell 101 and the main shell 102, and the distance between the first convex lens 6 and the second convex lens 7 is adjusted by rotating and moving the adjusting knob 13;

the optical axes of the second convex lens 7, the second spectroscope 8, the third spectroscope 11, and the wavefront sensor 13 in the movable housing 101 are collinear with the optical axes of the first spectroscope 3 and the first convex lens 6 in the housing 100 of the contact eye.

Wherein: the wavelength of the infrared light emitting diode 2 is preferably 900-1100nm, and the wavelength of the light source 10 is preferably 780-900 nm.

This refractometer can reduce refraction error: the pupil imaging camera 5 of the first pupil imaging branch light path is a light path for imaging and judging the pupil position of the eye 1 after illuminating the pupil of the eye 1 by means of the light of the infrared light emitting diode 2; when the second light source optical path assists in refractive objective detection of human eyes, the light source 10 enters the eyes 1 as beacon light to carry eye aberration, and backward reflected light enters the wavefront sensor 13 of the main optical path; the third optotype displaying optical path, that is, the optotype generating and transporting optical path for inputting the optotype for subjective detection from the optotype displaying device 15 to the main optical path. The final wavefront sensor 13 of the main optical path is used for collecting and analyzing wavefront information of the eye 1, restoring wavefront aberration of the human eye according to the Hartmann wavefront sensing principle, and obtaining ametropia information of the human eye, including an out-of-focus value, an astigmatism value and an astigmatism angle.

The invention uses a spectroscope to refract a branch light path to directly enter the main light path on the optical structure, the refraction error of the branch light path is only one level, the level error can not be amplified, the refraction error source of the branch light path is single and is easy to confirm and correct. Compared with the existing Chinese patent 201910777661.8, the structure of the optical path splitter has two branch optical paths which are combined into one optical path after three-stage refraction respectively, and then the optical path splitter refracts and amplifies the refraction errors of the branch optical paths by the refraction of the optical path splitter for three times continuously, and the indistinct errors are generated by the refraction of the optical path splitter, so that a correction method is not easy to find, and the errors are not easy to correct. Compared with the Chinese patent 201910777661.8, the number of stages for the branch optical path to enter the main optical path is less and the structure is more reasonable.

This refractometer is miniaturized: the main light path is only provided with six components, wherein only one group of 4f system is provided, so that the main light path is short, and three branch light path components are few, thereby being convenient for manufacturing the optometry instrument into a small size, being capable of being operated in a handheld mode, being convenient to carry and being suitable for being used in any places.

The invention has the advantages that: the main light path and the three branch light paths are reasonable in communicating design, the light paths of the main light path and the branch light paths are short, so that the optical components are few, the optical system can be miniaturized, a handheld operation mode is easy to realize, the optical system is convenient to carry and use on site, and the optical system is suitable for objective and subjective optometry of eyes in any place.

Drawings

FIG. 1 is a schematic structural view of the present invention;

1 is a human eye, 2 is an infrared light emitting diode, 3 is a first spectroscope, 4 is a third convex lens, 5 is a pupil imaging camera, 6 is a first convex lens, 7 is a second convex lens, 8 is a second spectroscope, 9 is a fourth convex lens, 10 is a light source, 11 is a third spectroscope, 12 is a movement adjustment knob, 13 is a wavefront sensor, 14 is a fifth convex lens, 15 is a sighting mark display device, 100 is a housing of a contact eye, 101 is a movable housing, and 102 is a main housing.

Detailed Description

Embodiment 1, a short main optical path small optometry and optometry unit

As shown in figure 1 of the drawings, in which,

the utility model provides a small-size optometry and eyesight test appearance of short main light path, includes a main light path and three branch light path, and three branch light path communicates its characterized in that through spectroscope and main light path respectively: the main optical path is provided with a first spectroscope 3, a first convex lens 6, a second convex lens 7, a second spectroscope 8, a third spectroscope 11 and a wavefront sensor 13 in sequence from the first spectroscope 3 close to the eye 1 to the final wavefront sensor 13; wherein the first convex lens 6 and the second convex lens 7 form a 4f system structure;

the mechanical structure of each optical component is as follows:

The visual target display device 15 may be selected from a liquid crystal display, a plasma display, an electroluminescence display, an organic light emitting display, and a printed chart.

The method for using the optometry and optometry tester comprises the following steps:

first, pupil imaging is performed by the pupil imaging camera 5, and pupil center alignment is performed by moving the main housing 102 by observing the pupil image on the display screen at the opening position of the main housing 102.

Then, the movable shell 101 is started to carry out refraction measurement, the light source entering the eyeground carries the ametropia information of the human eyes to be acquired by the wavefront sensor 13, the ametropia value is displayed on the display screen, and after the movable shell 101 is manually adjusted to correct the diopter according to the ametropia value, the testee finishes vision examination by judging the image content on the sighting target display device 15.

Claims

1. The utility model provides a small-size optometry and eyesight test appearance of short main light path, includes a main light path and three branch light path, and three branch light path communicates its characterized in that through spectroscope and main light path respectively: the main light path is sequentially provided with a first spectroscope (3), a first convex lens (6), a second convex lens (7), a second spectroscope (8), a third spectroscope (11) and a wavefront sensor (13) from the first spectroscope (3) close to eyes to the final wavefront sensor (13); wherein the first convex lens (6) and the second convex lens (7) form a 4f system structure;

the first light splitting lens (3), the third convex lens (4) and the pupil imaging camera (5) are sequentially arranged on the component of the first branch light path from the near side to the far side of the main light path;

the component of the second branch light path is provided with a second beam splitter (8), a fourth convex lens (9) and a light source (10) in sequence from the near to the far of the main light path;

the third light splitting mirror (11), a fifth convex lens (14) and a sighting mark display device (15) are sequentially arranged on the component of the third branch light path from the near side to the far side of the main light path;

the mechanical structure of each optical component is as follows:

the first spectroscope (3), the third convex lens (4), the pupil imaging camera (5) and the first convex lens (6) are fixed on the shell (100) of the contact eye according to a light path structure, and the infrared light-emitting diode (2) is fixed on the front panel of the shell (100) of the contact eye;

the second convex lens (7), the second spectroscope (8), the fourth convex lens (9), the light source (10), the third spectroscope (11), the wavefront sensor (13), the fifth convex lens (14) and the sighting mark display device (15) are fixed on the movable shell (101) according to the light path structure;

the shell (100) of the contact eye is fixedly connected with the main shell (102), the movable shell (101) is slidably connected with the main shell (102), and a sliding adjusting knob (12) is arranged between the movable shell (101) and the main shell (102) and used for adjusting the distance between the first convex lens (6) and the second convex lens (7);

the optical axes of the second convex lens (7), the second spectroscope (8), the third spectroscope (11) and the wavefront sensor (13) on the movable shell (101) are the same straight line with the optical axes of the first spectroscope (3) and the first convex lens (6) in the shell (100) of the contact eye.