CN107361738B - Diaphragm system for ophthalmic device and ophthalmic device - Google Patents
Diaphragm system for ophthalmic device and ophthalmic device Download PDFInfo
- Publication number
- CN107361738B CN107361738B CN201710701752.4A CN201710701752A CN107361738B CN 107361738 B CN107361738 B CN 107361738B CN 201710701752 A CN201710701752 A CN 201710701752A CN 107361738 B CN107361738 B CN 107361738B
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- light
- diaphragm system
- lcd screen
- infrared
- areas
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- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 210000001525 retina Anatomy 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 230000008859 change Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 4
- 210000005252 bulbus oculi Anatomy 0.000 abstract description 2
- 238000007689 inspection Methods 0.000 abstract description 2
- 210000001508 eye Anatomy 0.000 description 7
- 238000005259 measurement Methods 0.000 description 4
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- 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
- A61B3/103—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
-
- 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
- A61B3/0016—Operational features thereof
-
- 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
- A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
-
- 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
- A61B3/13—Ophthalmic microscopes
- A61B3/135—Slit-lamp microscopes
-
- 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
Abstract
The invention provides ophthalmic equipment and a diaphragm system, and belongs to the field of ophthalmic instruments. It comprises the following steps: the light source is used for emitting infrared light; a light beam generation mechanism having a plurality of light transmitting areas for dividing the infrared light into a plurality of beams; an image collector for collecting images of a plurality of light spots respectively formed by a plurality of infrared lights on the retina of the subject; the diaphragm system further comprises a driving mechanism for driving the light transmitting areas to move in a direction perpendicular to the optical axis to change the positions of the light transmitting areas. The light beam generating mechanism is an LCD screen which is provided with a plurality of light transmission areas with variable positions and allowing infrared light to pass through. Even if the eyeball position of a detected person changes during inspection, at least one detection position always exists in the light transmission area, and under the detection position, the image collector can collect complete all light spots, so that the measured data after fitting is accurate.
Description
Technical Field
The invention belongs to ophthalmic equipment, and particularly relates to a diaphragm system for ophthalmic equipment and ophthalmic equipment such as fundus cameras, optometry instruments, slit lamps and the like with the diaphragm system.
Background
The diaphragm system is one of the core components of ophthalmic apparatuses such as optometry. At present, the working principle of the diaphragm system is as follows: the method comprises the steps of dividing a light beam into a plurality of light beams through a plurality of holes, collecting images of light spots formed by the light beams on retina, wherein the number of the holes is at least 7, the holes are arranged at equal intervals along a circle, correspondingly, the collected images also have the corresponding light spots, and fitting the light spots to calculate diopter and the like. However, in actual measurement, the eyes of the subject cannot be fixed to keep the eyes at the same position in the measurement process, so that the problem that the positions of light spots deviate from each other or even part of light spots cannot be acquired can be caused in the acquired images, and the optometry is inaccurate.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a diaphragm system for an ophthalmic apparatus and an ophthalmic apparatus such as a fundus camera, an optometry, a slit lamp, etc. having such a diaphragm system, the measurement of which is relatively accurate.
In order to solve the technical problems, the invention adopts the following technical scheme:
a diaphragm system for an ophthalmic device, comprising:
the light source is used for emitting infrared light;
a light beam generation mechanism having a plurality of light transmitting areas for dividing the infrared light into a plurality of beams;
an image collector for collecting images of a plurality of light spots respectively formed by a plurality of infrared lights on the retina of the subject;
the diaphragm system further comprises a driving mechanism for driving the light transmitting areas to move in a direction perpendicular to the optical axis to change the positions of the light transmitting areas.
According to a preferred aspect of the present invention, the light beam generating mechanism is an LCD panel having a plurality of light transmitting areas of variable positions allowing infrared light to transmit therethrough, and other areas of the LCD panel except for the plurality of light transmitting areas are light shielding areas; the light source is a backlight source of the LCD screen, and the backlight source is arranged at the rear of the LCD screen to emit infrared light to the LCD screen.
More preferably, the driving mechanism includes an LCD display driving circuit for changing the position of the light transmitting area on the LCD panel.
More preferably, the LCD screen is a monochrome LCD screen.
More preferably, the number of the light-transmitting areas is at least 7, and the light-transmitting areas are distributed on the LCD screen at equal intervals along a circle.
According to another preferred aspect of the present invention, the light beam generating mechanism is a light shielding plate, and a plurality of light holes are formed in the light shielding plate to form a plurality of the light transmitting areas.
More preferably, the driving mechanism includes a motor or a driving cylinder or the like for driving the light shielding plate to move in a direction perpendicular to the optical axis.
According to a specific aspect of the invention, the wavelength of the infrared light is 800-950 nm.
According to a specific aspect of the invention, the image collector is a CCD sensor.
An ophthalmic device having said diaphragm system. Specifically, the invention also adopts the following technical scheme: a fundus camera having the diaphragm system; an optometer having said diaphragm system; a slit lamp having said diaphragm system.
By adopting the technical scheme, the invention has the following advantages compared with the prior art:
the light transmission area can move along the direction perpendicular to the optical axis and the position is variable, so that the position of the light beam can be changed, even if the eyeball position of a detected person is changed during inspection, at least one detection position always exists in the light transmission area, and under the detection position, the image collector can collect complete all light spots, and then the data measured after fitting are accurate.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the optical path of a programmable LCD aperture system of embodiment 1;
FIGS. 2a and 2b are schematic front views of an LCD screen of embodiment 1, in which the light-transmitting regions are respectively located at two different positions;
FIGS. 3a and 3b are schematic views of the optical path of an aperture system according to embodiment 2, wherein the shutter disk is in two different positions;
fig. 4 is a schematic front view of the compact disc of fig. 3a, 3 b.
Wherein, 1, a backlight source; 2. an LCD screen; 20. a light transmission region; 21. a light shielding region; 3. a human eye; 4. a CCD sensor;
1', a light source; 2', a light shielding plate; 20', light holes; 3', human eyes; 4', CCD sensor.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
The embodiment provides an optometry apparatus, in particular a programmable LCD diaphragm system of the optometry apparatus. Referring to fig. 1, a programmable LCD aperture system comprising:
the light source is specifically an infrared light source and is used for emitting infrared light, and the wavelength of the infrared light is 800-950 nm;
a light beam generating mechanism having a plurality of light transmitting areas for dividing the infrared light into a plurality of beams;
an image collector for collecting images of a plurality of spots respectively formed on the retina of the subject by a plurality of infrared lights, specifically, a CCD sensor 4;
the diaphragm system further includes a driving mechanism for driving the plurality of light transmitting areas to move in a direction perpendicular to the optical axis to change positions of the plurality of light transmitting areas. The optical axis here refers to the center line of the infrared beam, and the direction perpendicular to the optical axis, that is, the propagation path of the infrared beam, indicates that the movement of the light transmitting area is not performed along the propagation direction of the beam in the present invention.
In particular, in the present embodiment, the light beam generation mechanism employs the LCD panel 2. Referring to fig. 2a and 2b, the LCD panel 2 has a plurality of light-transmitting areas 20 which allow infrared light to pass therethrough and the other areas of the LCD panel 2, except for the plurality of light-transmitting areas 20, are light-shielding areas 21. The light source is the backlight source 1 of the LCD screen 2, and the backlight source 1 is arranged behind the LCD screen 2 to emit infrared light to the LCD screen 2. The driving mechanism includes an LCD display driving circuit for changing the position of the light transmitting area 20 on the LCD panel 2, and the LCD display driving circuit changes the position of the light transmitting area 20 on the LCD panel 2 according to a set program, so that the position of the infrared light beam projected from the LCD panel 2 with respect to the human eye 3 also changes. In actual detection, the light-transmitting area 20 is sequentially located at different positions according to a set program, and spot images on the retina at each position are collected until all spots in the collected spot images are complete, then the position is the detection position, and the spot images collected at the detection position are fitted to obtain diopter and other values. Even if the human eyes move or shift during detection, a detection position can always acquire a complete light spot image. The LCD display driving circuit drives the LCD panel 2 by a known driving method, which will not be described herein.
It should be noted that: the LCD screen 2 is a monochrome LCD screen, and the number of light-transmitting areas on the LCD screen 2 is not less than 7, and the light-transmitting areas are arranged at equal intervals along a circle, so that the collected light spot images can be fitted. As shown in fig. 2a and 2b, the number of light-transmitting areas is specifically 9. During measurement, the LCD screen 2, backlight 1, etc. are held stationary and only the position of the light transmitting area is changed under the control of the LCD display driving circuit to adjust the position of the spot on the retina, including but not limited to the two positions shown in fig. 2a and 2 b. By adopting the driving mode, the system structure can be simplified, and the position change of the light transmission area is easy to control and more accurate by controlling the LCD display driving circuit.
Example 2
The present embodiment is basically the same as embodiment 1, and differs from embodiment 1 in the light beam generating mechanism.
As shown in fig. 3a and 3b, the light beam generating mechanism is a light shielding plate 2', a plurality of light holes 20' are formed in the light shielding plate 2', and the light holes 20' are the light transmitting areas. The infrared light is emitted from the light source 1', then is divided into a plurality of infrared light beams through a plurality of light transmission holes 20' of the light shielding plate 2', the infrared light beams are incident to the human eye 3' and form light spots on the retina, and the light spot images are acquired through the CCD sensor 4 '. The light shielding plate 2 'is driven to move by a mechanical mechanism, such as a driving mechanism including a motor or a driving cylinder for driving the light shielding plate 2' to move in a direction perpendicular to the optical axis, or the like.
It should be noted that: the position of the spot on the retina is adjusted by moving the mask 2 'as a whole in this embodiment, and the position of the mask 2' includes, but is not limited to, two positions as shown in fig. 3a and 3b, and in either position, the position of the light transmitting hole 20 'on the mask 2' is unchanged.
Furthermore, the diaphragm system provided in embodiments 1 and 2 can be applied to a variety of ophthalmic devices including, but not limited to, fundus cameras, refractors, and slit lamps.
The above-described embodiments are provided for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, not to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (10)
1. A diaphragm system for an ophthalmic device, comprising:
the light source is used for emitting infrared light;
a light beam generation mechanism having a plurality of light-transmitting areas for dividing the infrared light into a plurality of beams, the plurality of beams of infrared light respectively forming a plurality of light spots on a retina of a subject, the plurality of light spots being arranged at equal intervals along a circle;
an image collector for collecting images of a plurality of light spots respectively formed by a plurality of infrared lights on the retina of the subject;
the method is characterized in that:
the diaphragm system further includes a driving mechanism for driving the plurality of light transmitting areas to move in a direction perpendicular to the optical axis to change positions of the plurality of light transmitting areas on the retina;
the diaphragm system is configured to sequentially enable the light transmission area to be in different positions, collect the light spot images on the retina at each position until all the positions of the light spots in the collected light spot images are complete as target detection positions, collect the light spot images at the target detection positions and fit the light spot images to obtain the diopter of the testee.
2. The diaphragm system of claim 1 wherein the beam generating mechanism is an LCD screen having a plurality of variable position light transmitting regions allowing infrared light to pass therethrough, other regions of the LCD screen except for the plurality of light transmitting regions being light shielding regions; the light source is a backlight source of the LCD screen, and the backlight source is arranged at the rear of the LCD screen to emit infrared light to the LCD screen.
3. The diaphragm system of claim 2 wherein the drive mechanism comprises an LCD display drive circuit for changing the position of the light transmissive region on the LCD screen.
4. The diaphragm system of claim 2 wherein the LCD screen is a monochrome LCD screen.
5. The diaphragm system of claim 2 wherein the number of light transmissive areas is at least 7, and wherein the plurality of light transmissive areas are equally spaced along a circle on the LCD screen.
6. The diaphragm system of claim 1 wherein the beam generating mechanism is a light shield having a plurality of light apertures formed therein to form a plurality of the light transmissive regions.
7. A diaphragm system according to claim 6, characterized in that the drive mechanism comprises a motor or a drive cylinder or the like for driving the shutter plate to move in a direction perpendicular to the optical axis.
8. The diaphragm system of any of claims 1-7 where the infrared light has a wavelength of 800-950 nm.
9. The diaphragm system of any of claims 1-7 where the image collector is a CCD sensor.
10. An ophthalmic device having a diaphragm system as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710701752.4A CN107361738B (en) | 2017-08-16 | 2017-08-16 | Diaphragm system for ophthalmic device and ophthalmic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710701752.4A CN107361738B (en) | 2017-08-16 | 2017-08-16 | Diaphragm system for ophthalmic device and ophthalmic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107361738A CN107361738A (en) | 2017-11-21 |
| CN107361738B true CN107361738B (en) | 2023-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710701752.4A Active CN107361738B (en) | 2017-08-16 | 2017-08-16 | Diaphragm system for ophthalmic device and ophthalmic device |
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| Country | Link |
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| CN (1) | CN107361738B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109431453B (en) * | 2018-11-05 | 2021-09-28 | 温州医科大学附属眼视光医院 | Eye vision instrument for objective vision general survey |
| CN115553714A (en) * | 2021-07-02 | 2023-01-03 | 深圳盛达同泽科技有限公司 | Optometry equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5617156A (en) * | 1990-11-27 | 1997-04-01 | Kabushiki Kaisha Topcon | Fundus camera |
| CN102824157A (en) * | 2012-09-03 | 2012-12-19 | 苏州捷美医疗器械有限公司 | Skiascope |
| WO2013165689A1 (en) * | 2012-04-30 | 2013-11-07 | Clarity Medical Systems, Inc. | Ophthalmic wavefront sensor operating in parallel sampling and lock-in detection mode |
| CN104887176A (en) * | 2015-06-18 | 2015-09-09 | 苏州四海通仪器有限公司 | Handheld independent vision measurement device and method |
| WO2015166549A1 (en) * | 2014-04-30 | 2015-11-05 | 株式会社クリュートメディカルシステムズ | Ocular function measurement device |
| DE102014116152A1 (en) * | 2014-11-06 | 2016-05-12 | Carl Zeiss Meditec Ag | Device for examining eyes with retinal illumination |
| WO2017025583A1 (en) * | 2015-08-12 | 2017-02-16 | Carl Zeiss Meditec, Inc. | Alignment improvements for ophthalmic diagnostic systems |
| CN208286987U (en) * | 2017-08-16 | 2018-12-28 | 苏州四海通仪器有限公司 | A kind of optical stop system and Ophthalmologic apparatus for Ophthalmologic apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004029056A1 (en) * | 2004-06-16 | 2006-01-12 | Carl Zeiss | Variable aperture, illumination device, optical observation device and optical observation device |
| DE102006039137A1 (en) * | 2006-08-21 | 2008-02-28 | Carl Zeiss Surgical Gmbh | Optical device, use of an optical device according to the invention and methods for blocking light reflections in the observation beam path of an optical device |
-
2017
- 2017-08-16 CN CN201710701752.4A patent/CN107361738B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5617156A (en) * | 1990-11-27 | 1997-04-01 | Kabushiki Kaisha Topcon | Fundus camera |
| WO2013165689A1 (en) * | 2012-04-30 | 2013-11-07 | Clarity Medical Systems, Inc. | Ophthalmic wavefront sensor operating in parallel sampling and lock-in detection mode |
| CN102824157A (en) * | 2012-09-03 | 2012-12-19 | 苏州捷美医疗器械有限公司 | Skiascope |
| WO2015166549A1 (en) * | 2014-04-30 | 2015-11-05 | 株式会社クリュートメディカルシステムズ | Ocular function measurement device |
| DE102014116152A1 (en) * | 2014-11-06 | 2016-05-12 | Carl Zeiss Meditec Ag | Device for examining eyes with retinal illumination |
| CN104887176A (en) * | 2015-06-18 | 2015-09-09 | 苏州四海通仪器有限公司 | Handheld independent vision measurement device and method |
| WO2017025583A1 (en) * | 2015-08-12 | 2017-02-16 | Carl Zeiss Meditec, Inc. | Alignment improvements for ophthalmic diagnostic systems |
| CN208286987U (en) * | 2017-08-16 | 2018-12-28 | 苏州四海通仪器有限公司 | A kind of optical stop system and Ophthalmologic apparatus for Ophthalmologic apparatus |
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| Publication number | Publication date |
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| CN107361738A (en) | 2017-11-21 |
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