CN110755033B - Eye detection device - Google Patents
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- CN110755033B CN110755033B CN201911014436.5A CN201911014436A CN110755033B CN 110755033 B CN110755033 B CN 110755033B CN 201911014436 A CN201911014436 A CN 201911014436A CN 110755033 B CN110755033 B CN 110755033B
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- 238000001514 detection method Methods 0.000 title claims abstract description 64
- 230000003287 optical effect Effects 0.000 claims abstract description 139
- 238000005259 measurement Methods 0.000 claims abstract description 50
- 230000001179 pupillary effect Effects 0.000 claims abstract description 11
- 238000003384 imaging method Methods 0.000 claims description 39
- 238000005286 illumination Methods 0.000 claims description 16
- 210000001747 pupil Anatomy 0.000 claims description 10
- 238000012360 testing method Methods 0.000 description 10
- 208000001491 myopia Diseases 0.000 description 9
- 230000004379 myopia Effects 0.000 description 9
- 210000004087 cornea Anatomy 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000032544 Cicatrix Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000030533 eye disease Diseases 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- 231100000241 scar Toxicity 0.000 description 1
- 230000037387 scars Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/14—Arrangements specially adapted for eye photography
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/0008—Apparatus for testing the eyes; Instruments for examining the eyes provided with illuminating means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/107—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining the shape or measuring the curvature of the cornea
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/14—Arrangements specially adapted for eye photography
- A61B3/15—Arrangements specially adapted for eye photography with means for aligning, spacing or blocking spurious reflection ; with means for relaxing
- A61B3/152—Arrangements specially adapted for eye photography with means for aligning, spacing or blocking spurious reflection ; with means for relaxing for aligning
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Abstract
An eye detection apparatus comprising: a measurement light-emitting device located at a first end of the eye detection device for emitting measurement light to the eye during eye detection, the measurement light-emitting device having a first optical axis; a calibration device configured to adjust a relative position of the eye and the eye detection device such that the eye is in a position to be detected relative to the eye detection device, wherein the position to be detected is a position in which a pupillary axis of the eye is coaxial with the first optical axis and a predetermined distance exists between the eye and the measurement light emitting device.
Description
Technical Field
The present disclosure relates to the field of detection, and in particular, to an eye detection device.
Background
Myopia is a common eye disease, and according to the domestic survey, the incidence rate of myopia of national population in China reaches 50% by 2020, the population suffering from myopia approaches 7.11 hundred million, and the population with middle-high myopia reaches 7000 million people.
The middle-high myopia can seriously affect the daily life of people, and particularly the middle-high myopia of primary and secondary school students can directly affect the enthusiasm of outdoor exercises of students and the physical and mental health of teenagers. In recent years, the cornea shaping mirror has attracted attention as a short-term myopia treatment mirror. The cornea shaping mirror is simple and convenient to use, obvious in myopia treatment effect, and capable of improving myopia of children by adopting the cornea shaping mirror in more and more hospitals without operations. However, in the use process of the orthokeratology mirror, the cornea is deformed by pressing the cornea of the human eye, so that the cornea is abnormal sometimes caused by wrong wearing treatment, so that the cornea needs to be detected and judged regularly.
Disclosure of Invention
An embodiment of the present disclosure provides an eye detection apparatus, including: a measurement light-emitting device located at a first end of the eye detection device for emitting measurement light to the eye during eye detection, the measurement light-emitting device having a first optical axis; a calibration device configured to adjust a relative position of the eye and the eye detection device such that the eye is in a position to be detected relative to the eye detection device, wherein the position to be detected is a position in which a pupillary axis of the eye is coaxial with the first optical axis and a predetermined distance exists between the eye and the measurement light emitting device.
In some embodiments, the second end of the eye-detection apparatus can be affixed to a portable imaging device, the first optical axis being coaxial with an optical axis of a lens of the portable imaging device such that the eye can be imaged through the lens.
In some embodiments, the calibration device comprises a first calibration device for adjusting the position of the eye detection device in a plane perpendicular to the first optical axis such that the first optical axis is coaxial with the pupillary axis, the first calibration device comprising: a first calibration light source spaced from the first optical axis; a first collimating lens disposed between the first collimating light source and the first optical axis; and a first half mirror, the center of first half mirror sets up on the first optical axis, first half mirror sets up at the measuring illuminator towards the one side of eye detection device's second end, wherein, first calibration light source sets up focus department of first calibration lens, the third optical axis of first calibration lens with first optical axis intersect in first half mirror the center for the first calibration light that first calibration light source transmitted is the first parallel light towards first optical axis outgoing behind the first calibration lens, at least part of first parallel light is passed through first half mirror is reflected along the first direction orientation measuring with first optical axis is with illuminator outgoing.
In some embodiments, the calibration means includes second calibration means for adjusting the position of the eye detection means along the first optical axis with the first optical axis coaxial with the pupil axis so that the eye and the measurement light emission means have the predetermined distance therebetween, the second calibration means including: the second calibration light source is arranged on one side of the first optical axis;
a second collimating lens disposed at the one side of the first optical axis; a third collimating lens disposed at the other side of the first optical axis and symmetrical to the second collimating lens with respect to the first optical axis; a first mirror disposed on the other side of the first optical axis; a second mirror disposed on the other side of the first optical axis; and a second half mirror provided on a side of the first half mirror away from the light emitting device for measurement, a center of the second half mirror being provided on the first optical axis, wherein the second calibration light source is provided at a focal point of the second calibration lens.
In some embodiments, the light emitting device for measurement includes: the projection pattern is in a plurality of concentric circular rings, and a circular opening is formed in the middle area of the projection pattern; and the projection light source is arranged on one side of the projection pattern facing the second end and is an annular light source, wherein the first optical axis passes through the projection pattern and the circle center of the projection light source, and the projection light source generates projection light to project the projection pattern onto eyes positioned at the position to be measured.
In some embodiments, the eye detection apparatus further comprises: and the converging lens is arranged on one side of the calibrating device far away from the first end, and the optical axis of the converging lens is coaxial with the first optical axis.
In some embodiments, the eye detection apparatus further comprises: and the diaphragm is arranged on one side of the calibration device, which is far away from the first end, and the optical axis of the diaphragm is coaxial with the first optical axis.
In some embodiments, the eye detection apparatus further comprises: the converging lens is arranged on one side of the calibrating device far away from the first end, and the optical axis of the converging lens is coaxial with the first optical axis; and the diaphragm is arranged on one side of the calibrating device far away from the first end, the optical axis of the diaphragm is coaxial with the first optical axis, and the projection pattern and the diaphragm are located at conjugate positions relative to the converging lens.
In some embodiments, the eye detection apparatus further comprises: an illumination source disposed at the first end and located to one side of the first optical axis, the illumination source configured to provide ambient illumination light at eye detection.
In some embodiments, the portable imaging device comprises a cell phone.
Drawings
FIG. 1 is a schematic diagram of an eye detection apparatus according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of an eye-detection apparatus in cooperation with a portable imaging apparatus for performing eye measurements according to an embodiment of the present disclosure;
figure 3 is a schematic diagram of adjusting the pupillary axis of an eye under test to be coaxial with the first optical axis using a first alignment device in accordance with an embodiment of the present disclosure;
fig. 4 is a schematic diagram of adjusting a pupillary axis of an eye to be measured to a predetermined distance from a light-emitting device for measurement using a second calibration device according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a measurement of an eye using a light emitting device for measurement according to an embodiment of the present disclosure.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention and should not be construed as limiting the invention.
Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details.
The present disclosure provides an eye examination apparatus, comprising a measurement light emitting device and a calibration device, wherein the measurement light emitting device is located at a first end of the eye examination apparatus for emitting measurement light to an eye during eye examination, and the measurement light emitting device has a first optical axis; the calibration device is configured to adjust a relative position of the eye and the eye detection device so that the eye is in a position to be detected relative to the eye detection device, wherein the position to be detected is a position in which a pupil axis of the eye is coaxial with the first optical axis and a predetermined distance exists between the eye and the measurement light-emitting device.
The eye detection device provided by the disclosure is a portable detection device, and can be popularized and used in common families. The eye detection device can be used with a portable imaging device, such as a cell phone or the like. The eye detection device can image the eye to be detected through the portable imaging device, and then measurement information is obtained.
An embodiment of the present disclosure provides an eye detection apparatus, and fig. 1 is a schematic structural diagram of the eye detection apparatus. As shown in fig. 1, the eye examination apparatus 100 (outlined by a broken line frame) includes a light emitting device 30 for measurement and a calibration device 110. The measurement light emitting device 30 is located at a first end (left end as viewed in fig. 1) of the eye examination device for emitting measurement light to the eye E at the time of eye examination. The light emitting device for measurement 30 has a first optical axis a. In the present embodiment, the optical axis of the eye detecting device 100 is a straight line and is coaxial with the optical axis of the measuring light emitting device 30, and therefore, the optical axis of the eye detecting device is also referred to as a first optical axis a in the following description.
It will be appreciated by those skilled in the art that in some embodiments, the optical axis of the eye-detection apparatus may also be a polygonal line, i.e. the optical axis at one end of the eye-detection apparatus is not coaxial with the optical axis at the other end.
In this embodiment, the calibration device 110 is configured to adjust the relative position of the eye E and the eye detecting device 100 so that the eye E is located at a position to be detected relative to the eye detecting device 100, wherein the position to be detected is a position where the pupil axis b of the eye is coaxial with the first optical axis a and the eye E has a predetermined distance from the measuring light emitting device 100.
The calibration device 110 comprises a first calibration device 10 and a second calibration device 20, the first calibration device 10 being adapted to adjust the position of the eye-detecting device 100 in a plane perpendicular to the first optical axis a such that the first optical axis a is coaxial with the pupillary axis b of the eye E. The second calibration means 20 is used to adjust the position of the eye detection apparatus 100 along the first optical axis a with the first optical axis a coaxial with the pupil axis b of the eye E so that the eye E has a predetermined distance from the measurement light emitting apparatus 100.
As shown in fig. 1, the first collimating device 10 includes a first collimating light source 11, a first collimating lens 12, and a first half mirror 13. Wherein the first calibration light source 11 is disposed at a predetermined distance from the first optical axis a, i.e., the first calibration light source 11 is disposed on the first optical axis a side (e.g., the lower side of the first optical axis a as shown in fig. 1); the first collimating lens 12 is disposed between the first collimating light source 11 and the first optical axis a, the center of the first half mirror 13 is disposed on the first optical axis, and the first half mirror 13 is disposed on a side of the measuring light emitting device 30 facing the second end (the right end as viewed in fig. 1) of the eye detecting device, that is, the first half mirror 13 is disposed on the right side of the measuring light emitting device 30 along the first optical axis a.
In the present embodiment, as shown in fig. 1, the first collimating light source 11 is disposed at the focal point of the first collimating lens 12, the first collimating lens 12 is a positive lens, and the third optical axis c of the first collimating lens 12 intersects the first optical axis a at the center of the first half mirror 12, for example, the third optical axis c intersects the first optical axis a perpendicularly. Thus, the first calibration light emitted by the first calibration light source 11 is first parallel light emitted toward the first optical axis a after passing through the first calibration lens 12, and at least a part of the first parallel light is reflected by the first half mirror 13 and emitted toward the light emitting device 30 for measurement along the first direction X parallel to the first optical axis.
As shown in fig. 1, the second collimating device 20 includes a second collimating light source 21, a second collimating lens 22, a third collimating lens 23, a first reflector 24, a second reflector 25, and a second half mirror 26. Wherein the second collimating light source 21 and the second collimating lens 22 are disposed on the side of the first optical axis a, for example, on the upper side of the first optical axis a shown in fig. 1; the second collimating lens 22 is closer to the first optical axis a than the second collimating light source 21; a third collimating lens 23 disposed on the other side of the first optical axis a, for example, on the lower side of the first optical axis a shown in fig. 1, and disposed symmetrically with the second collimating lens 22 with respect to the first optical axis a; the first mirror 24 and the second mirror 25 are disposed on the other side of the first optical axis a; the second half mirror 26 is provided on the side of the first half mirror 13 away from the measurement light-emitting device, and the center of the second half mirror 26 is provided on the first optical axis a.
The second collimating light source 21 is disposed at the focal point of the second collimating lens 22, and the second collimating lens 22 is a positive lens and is located between the second collimating light source 21 and the first optical axis a. The second collimated light emitted from the second collimating light source 21 passes through the second collimating lens 22 to generate second parallel light, and the second parallel light is emitted toward the first optical axis a and forms a predetermined angle with the first optical axis a. At least a portion of the second parallel light is irradiated to the eye and emitted, then passes through the third collimating lens 23, and is reflected by the first reflector 24, the second reflector 25, and the second half mirror 26, and exits along a direction substantially toward the second end (the right end as viewed in fig. 1) of the eye-detecting device.
As shown in fig. 1, the light emitting device 30 for measurement includes a projection light source 31 and a projection pattern 32, wherein the projection light source is an annular light source or an annular arrangement of point light sources, such as an annular cold cathode tube light source or an annular arrangement of LED light sources, for emitting measurement light. The axis of the projection light source 31 is coaxial with the first optical axis a. The projection pattern 32 is located on a side of the projection light source 31 facing the first end of the eye detection apparatus 100, and has a plurality of concentric circular rings, the axis of the concentric circular rings is coaxial with the first optical axis a, and the middle area of the projection pattern has a circular opening. The measuring light irradiates the projection pattern 32 and projects a circular projection on the eye to be measured, at least a part of the measuring light is reflected by the eye to be measured and then transmitted along the direction opposite to the first direction X, and finally forms an image as a measuring image through the circular opening of the projection pattern.
In some embodiments, as shown in fig. 1, the first half mirror 13 is located between the light emitting device 30 for measurement and the second half mirror 26, and the arrangement is such that the first calibration light is not affected by the second half mirror 26, and the second calibration light is not affected by the first half mirror 13, so as to ensure the brightness of the calibration light in the light path, and further facilitate the calibration effect.
In some embodiments, the eye detecting device 100 further includes a converging lens 50, the optical axis of which is coaxial with the first optical axis a, and the converging lens 50 is located on a side of the calibrating device 110 away from the light-emitting device for measurement 30, that is, on a side of the second half mirror 26 away from the light-emitting device for measurement 30. The converging lens 50 may have a converging effect on the calibration light and the measurement light, so that the size of the eye-detecting device 100 in the direction of the first optical axis a is as small as possible, which is advantageous for the portability of the eye-detecting device.
In some embodiments, the eye-detecting device 100 further comprises a diaphragm 60, the optical axis of which is coaxial with the first optical axis a, and which is arranged on a side of the calibration device 110 remote from the measuring light-emitting device 30. The diaphragm 60 may shield interfering light rays entering the optical path.
In some embodiments, the projected pattern 32 and the stop 60 are located at conjugate positions relative to the converging lens 50.
Those skilled in the art will appreciate that the converging lens 50 and the stop 60 are not required and that in some embodiments at least one of the converging lens 50 and the stop 60 may be omitted.
In some embodiments, the eye-testing device 100 further includes an illumination source 40, the illumination source 40 being configured to provide ambient light of a particular wavelength for eye testing. Different wavelengths or colors of ambient light may be used for different tests of the eye.
The illumination light source 40 includes a first light source 41, a second light source 42, and a third light source 42, and in some embodiments, the first light source 41 is a white light source, the second light source 42 emits illumination light of 450 to 520nm, and the second light source 42 emits illumination light of 850 to 940 nm. When only the first light source 41 is used for illumination, the condition of congestion of eyes of the examinee can be checked, when only the second light source 42 is used for illumination, the condition of scars, lachrymal quantity and the like on the surface of the eyes can be checked, and when only the third light source 43 is used for illumination, the condition of meibomom glands of the eyes of the examinee can be checked.
In some embodiments, the first light source 41, the second light source 42, and the third light source 43 may be a red light source, a green light source, and a blue light source, respectively, and the first light source 41, the second light source 42, and the third light source 43 may mix light into white light. In this case, the illumination light source 40 further includes a filter 43 for passing light of a specific wavelength, and the white light passes through the filter 43 to obtain desired ambient light.
FIG. 2 shows a schematic view of an eye-detection apparatus in cooperation with a portable imaging apparatus for performing eye measurements. As shown in fig. 2, the eye-detecting apparatus 100 in the foregoing embodiment may be fitted to a portable imaging apparatus 200. The first optical axis a of the eye detection apparatus 100 is coaxial with the lens of the portable imaging apparatus 200, so that the eye E to be detected can be imaged by the lens of the portable imaging apparatus 200. The portable imaging device 200 may include a cellular phone, a digital camera, and the like.
The eye-detecting device 100 can be assembled to the portable imaging device 200 to form a portable eye-detecting system, and when the eye E is detected, the position of the portable eye-detecting system (i.e., the combination of the eye-detecting device 100 and the portable imaging device 200) relative to the eye E to be detected can be conveniently adjusted based on the calibration device 110 so that the eye E is in the position to be detected, and then the eye E is detected using the light-emitting device for measurement or the illumination light source. The eye detection device 100 and the portable eye detection system can conveniently detect eyes, can be popularized and used in common families, and do not need to go to a hospital or a physical examination center for detection.
The specific operation of the eye-detecting device 100 mounted to the portable imaging device 200 will be described in detail below.
Figure 3 is a schematic diagram of adjusting the pupillary axis of an eye under test to be coaxial with the first optical axis using a first alignment device in accordance with an embodiment of the present disclosure. As shown in fig. 3, when the eye-testing device 100 assembled to the portable imaging device 200 is used to test an eye to be tested, the eye to be tested E is first aligned with the eye-testing device 100, i.e., the pupillary axis b of the eye E is substantially parallel to and coaxial with the first optical axis a of the eye-testing device 100. However, since the eye-detecting apparatus 100 and the portable imaging apparatus 200 are position-controlled by the operator in a hand-held manner, the pupil axis b of the eye E may not be coaxial with the first optical axis a of the eye-detecting apparatus 100, with a certain deviation.
The first calibration light emitted by the first light source 11 of the first calibration device 10 is a first parallel light emitted toward the first optical axis a through the first calibration lens 12, and the first parallel light is, for example, perpendicular to the first optical axis a, and at least a portion of the first parallel light is reflected by the first half mirror 13 and emitted toward the first end (the left end as shown in fig. 1) of the eye detection device 100 along the first direction X parallel to the first optical axis, and irradiates the eye to generate a reflected light.
When the pupil axis b of the eye E is not coaxial with the first optical axis a, the corneal vertex Ec is not on the first optical axis a, the eye at this position is denoted as E ', the corneal vertex is denoted as Ec ', and an imaging optical path of light reflected by the corneal vertex Ec ' is shown as a dotted line reflection optical path, which is imaged at C ' through the condenser lens 50, the diaphragm 60, and the lens of the portable imaging device 200, and C ' is also not on the first optical axis a.
When the pupil axis b of the eye E is coaxial with the first optical axis a, the imaging optical path of light reflected by the corneal vertex Ec, as shown by the solid line reflection optical path, is imaged at C through the condenser lens 50, the stop 60, and the lens of the portable imaging device 200, and C is located on the first optical axis a.
The image imaged at C is centered within the display device or window of the portable imaging device 200, while the image imaged at C' may be offset from the center of the display device or window of the portable imaging device 200.
The eye-testing device 100 fitted to the portable imaging device 200 can be moved in a plane perpendicular to the first optical axis a until the image of the corneal vertex is centered in the display device or viewing window of the portable imaging device 200, at which point it is ensured that the pupillary axis b of the eye E is coaxial with the first optical axis a.
Fig. 4 is a schematic diagram of adjusting the pupillary axis of an eye to be measured to a predetermined distance from a light-emitting device for measurement using a second calibration device according to an embodiment of the present disclosure. In the case that the pupil axis b of the eye E to be detected is coaxial with the first optical axis a, the position between the eye E and the eye detecting device 100 still needs to be adjusted, so that the eye E and the measuring light emitting device 30 are separated by a predetermined distance to detect the human eye. As shown in fig. 4, the second collimating light source 21 of the second collimating device 20 emits the second collimating light, and the second collimating light generates the second parallel light after passing through the second collimating lens 22. The second parallel light is irradiated on the eye E to be measured and then reflected, and then transmitted through the third collimating lens 23, and then reflected by the first reflecting mirror 24, the second reflecting mirror 25, and the second half mirror 26 in sequence, and then imaged through the converging lens 50, the diaphragm 60, and the lens of the portable imaging device 200.
When the distance between the eye E and the light-emitting device 30 for measurement of the eye detecting device 100 is not equal to the predetermined distance, as shown in fig. 4, the eye at this position is denoted as E ", the corneal vertex is denoted as Ec", and the imaging optical path of the light reflected by the corneal vertex Ec "is denoted as a broken line optical path, which is imaged at D 'through the converging lens 50, the diaphragm 60, and the lens of the portable imaging device 200, and D' is not located on the first optical axis a.
When the distance between the eye E and the measuring light emitting device 30 of the eye inspection device 100 is equal to the predetermined distance, the imaging optical path of the light reflected by the corneal vertex Ec ″ is shown as a solid line optical path, which is imaged at D through the converging lens 50, the diaphragm 60, and the lens of the portable imaging device 200, and D is located on the first optical axis a.
The image imaged at D is centered within the display device or window of the portable imaging device 200, while the image imaged at D' may be offset from the center position within the display device or window of the portable imaging device 200.
The distance between the eye E and the measuring light emitting device 30 of the eye examination device 100 can be ensured to be equal to a predetermined distance by moving the eye examination device 100 fitted to the portable imaging device 200 back and forth in the direction of the first optical axis a until the image of the corneal vertex is located at the center position in the display device or viewing window of the portable imaging device 200, at which time the eye E is at the position to be examined.
Fig. 5 is a schematic diagram of a measurement of an eye using a light emitting device for measurement according to an embodiment of the present disclosure. After the eye detection device 10 is adjusted by the calibration device 110 so that the eye E is to be positioned, the projection light source 31 of the light emitting device 30 is turned on to perform the examination of the eye E, the measurement light emitted by the projection light source 31 is irradiated onto the projection pattern 32 and projects a circular projection on the eye to be examined, at least a portion of the measurement light is reflected by the eye to be examined and then transmitted in the opposite direction of the first direction X, and passes through the circular opening of the projection pattern and propagates in the opposite direction of the first direction X, and the measurement light sequentially passes through the first half mirror 13, the second half mirror 26, the converging lens 50, the diaphragm 60 and the lens of the portable imaging device 200 to be imaged in the display device or the viewing window of the portable imaging device 200. At the moment, a plurality of circular rings are also presented on the imaging of the eye, the distribution situation of the curvature radius of each position of the eye can be measured by analyzing the radius of the imaged circular ring from the central position, and the cornea curvature distribution situation of the eye is simulated by using pseudo colors, so that the corneal topography of the human eye is obtained.
It should be noted that the shapes and sizes of the respective components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present invention.
Directional phrases used in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., refer only to the direction of the attached drawings and are not intended to limit the scope of the present invention. The embodiments described above may be mixed and matched with each other or with other embodiments based on design and reliability considerations, i.e., technical features in different embodiments may be freely combined to form further embodiments.
It is to be noted that, in the attached drawings or in the description, the implementation modes not shown or described are all the modes known by the ordinary skilled person in the field of technology, and are not described in detail. Further, the above definitions of the various elements and methods are not limited to the various specific structures, shapes or arrangements of parts mentioned in the examples, which may be easily modified or substituted by those of ordinary skill in the art.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An eye detection device having oppositely disposed first and second ends, the eye detection device comprising:
a measurement light emitting device located at the first end of the eye detection device for emitting measurement light to the eye at the time of eye detection, the measurement light emitting device having a first optical axis;
a calibration device configured for adjusting a relative position of an eye and the eye detection device such that the eye is in a position to be detected relative to the eye detection device,
wherein the position to be detected is a position where the pupil axis of the eye is coaxial with the first optical axis and a predetermined distance is provided between the eye and the measuring light-emitting device,
the calibration device includes a first calibration device for adjusting a position of the eye detection device in a plane perpendicular to a first optical axis such that the first optical axis is coaxial with the pupillary axis, the first calibration device including:
a first calibration light source spaced from the first optical axis;
a first collimating lens disposed between the first collimating light source and the first optical axis; and
a first half mirror, the center of which is arranged on the first optical axis, the first half mirror is arranged on one side of the light-emitting device for measurement facing the second end of the eye detection device,
the calibration device further includes a second calibration device for adjusting a position of the eye detection device along the first optical axis with the first optical axis coaxial with the pupil axis so that the eye and the measurement light emission device have the predetermined distance therebetween, the second calibration device including:
the second calibration light source is arranged on one side of the first optical axis;
a second collimating lens disposed at the one side of the first optical axis;
a third collimating lens disposed at the other side of the first optical axis and symmetrical to the second collimating lens with respect to the first optical axis;
a first mirror disposed on the other side of the first optical axis;
a second mirror disposed on the other side of the first optical axis; and
and the second half mirror is arranged on one side of the first half mirror, which is far away from the light-emitting device for measurement, and the center of the second half mirror is arranged on the first optical axis.
2. The eye detection apparatus according to claim 1, wherein the second end of the eye detection apparatus is securable to a portable imaging apparatus, the first optical axis being coaxial with an optical axis of a lens of the portable imaging apparatus such that the eye is imageable through the lens.
3. The eye detection apparatus of claim 2,
the first calibration light source is arranged at the focus of the first calibration lens, a third optical axis of the first calibration lens is intersected with the first optical axis at the center of the first half-transmitting and half-reflecting mirror, so that first calibration light emitted by the first calibration light source is first parallel light emitted towards the first optical axis after passing through the first calibration lens, and at least one part of the first parallel light is emitted towards the measuring light-emitting device in the first direction parallel to the first optical axis after passing through the reflection of the first half-transmitting and half-reflecting mirror.
4. The eye detection apparatus of claim 2, wherein the second calibration light source is disposed at a focal point of the second calibration lens.
5. The eye detection apparatus according to claim 2, wherein the measurement light emitting means comprises:
the projection pattern is in a plurality of concentric circular rings, and a circular opening is formed in the middle area of the projection pattern; and
a projection light source disposed at a side of the projection pattern facing the second end, the projection light source being an annular light source,
the first optical axis passes through the projection pattern and the circle center of the projection light source, and the projection light source generates projection light to project the projection pattern to eyes at the position to be measured.
6. The eye detection apparatus according to any one of claims 1 to 4, further comprising:
and the converging lens is arranged on one side of the calibrating device far away from the first end, and the optical axis of the converging lens is coaxial with the first optical axis.
7. The eye detection apparatus according to any one of claims 1 to 4, further comprising:
and the diaphragm is arranged on one side of the calibration device, which is far away from the first end, and the optical axis of the diaphragm is coaxial with the first optical axis.
8. The eye detection apparatus of claim 5, further comprising:
the converging lens is arranged on one side of the calibrating device far away from the first end, and the optical axis of the converging lens is coaxial with the first optical axis;
a diaphragm disposed on a side of the calibration device remote from the first end, an optical axis of the diaphragm being coaxial with the first optical axis,
wherein the projected pattern and the diaphragm are located at conjugate positions with respect to a converging lens.
9. The eye detection apparatus of claim 5, further comprising:
an illumination source disposed at the first end and located to one side of the first optical axis, the illumination source configured to provide ambient illumination light at eye detection.
10. The eye detection apparatus in accordance with claim 2, wherein the portable imaging device comprises a cell phone.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103340596A (en) * | 2013-07-20 | 2013-10-09 | 太原中北新缘科技中心 | Device and method for measuring corneal curvature |
| CN103976708A (en) * | 2014-05-20 | 2014-08-13 | 深圳市莫廷影像技术有限公司 | Corneal vertex alignment method and system, and eye axis optical path length measurement method and system |
| CN107582022A (en) * | 2017-09-29 | 2018-01-16 | 欧普康视科技股份有限公司 | A kind of canthus film detecting device and detection method based on mobile phone |
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| JP3927695B2 (en) * | 1998-07-16 | 2007-06-13 | キヤノン株式会社 | Ophthalmic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103340596A (en) * | 2013-07-20 | 2013-10-09 | 太原中北新缘科技中心 | Device and method for measuring corneal curvature |
| CN103976708A (en) * | 2014-05-20 | 2014-08-13 | 深圳市莫廷影像技术有限公司 | Corneal vertex alignment method and system, and eye axis optical path length measurement method and system |
| CN107582022A (en) * | 2017-09-29 | 2018-01-16 | 欧普康视科技股份有限公司 | A kind of canthus film detecting device and detection method based on mobile phone |
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