CN101744605B - Ophthalmological device - Google Patents
Ophthalmological device Download PDFInfo
- Publication number
- CN101744605B CN101744605B CN200910254019.8A CN200910254019A CN101744605B CN 101744605 B CN101744605 B CN 101744605B CN 200910254019 A CN200910254019 A CN 200910254019A CN 101744605 B CN101744605 B CN 101744605B
- Authority
- CN
- China
- Prior art keywords
- light
- investigated
- those
- optical system
- eye
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
- A61B3/117—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for examining the anterior chamber or the anterior chamber angle, e.g. gonioscopes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Ophthalmology & Optometry (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Eye Examination Apparatus (AREA)
Abstract
The invention relates to an ophthalmological device, which can shoot the section image of a front eye of a patient. The ophthalmological comprises a base, a forehead abutting part and jaw supporting part fixed on the base for supporting the head of the patient, and a main body part movably arranged on the base, in which a determining system for determining the characteristic of the supported eye of the patient, a first shooting optical system shooting the front eye right side of the patient, a projection optical system having a projection optical axis and projecting a slit light to the eye and a second shooting optical system having a shooting optical axis crossed with the projection optical axis at the prescribed angle, a shooting lens for shooting the section image of the front eye and a shooting element arranged under the projection optical system are contained, the ophthalmological device also has a first shading part arranged above the main body part or the main body part side of the forehead abutting part to shield the interference light incident from the inclined upper front of the head of the patient to the upper eyelid or upper eyelash of the patient, and the first shading part has a structure for covering the upper eyelid and upper eyelash of the patient from the inclined upper front.
Description
Technical field
The present invention relates to measure the characteristic of those who are investigated's eyes, and take the Ophthalmoligic instrument of the front eye cross section picture of those who are investigated's eyes.
Background technology
As the Ophthalmoligic instrument of measuring those who are investigated's eyes, the known device that has the photographing optical system, the main part that holds each mensuration system and photographing optical system that there is the mensuration system measuring the characteristic of those who are investigated eyes and use, take the direct picture of eye before those who are investigated's eyes, can load movably the pedestal of main part (for example, tonometer, automatically eye instrument etc.).
The Ophthalmoligic instrument (for example,, with reference to patent documentation 1) of the known cross section picture that has the front eye (front eye entirety, cornea, crystalline lens etc.) of taking those who are investigated's eyes.The front eye cross section picture photographing for observing front eye, measure before the size (cornea is thick, anterior chamber depth etc.) etc. at regulation position of eye.
Patent documentation 1: Japanese kokai publication sho 63-197433 communique
Summary of the invention
Invent problem to be solved
In such Ophthalmoligic instrument, before taking the photographing optical system of eye cross section picture be set to it and take optical axis and form before the projection optical axis of the eye cross section projection optical system that looks like to use with the angle of intersection of regulation.In the time of oblique upper in projection optical system of the setting position of this photographing optical system, upper eyelashes shading that may those who are investigated from the reflected light of front eye, its structure as device is also inappropriate.Again, if the setting position of photographing optical system is at the oblique side direction of projection optical system, the light that projects to front eye may be by those who are investigated's nose shading, in order to address these problems, need to photographing optical system be set in the left and right sides of projection optical system, it is inadequate as apparatus structure.Again, when the setting position of photographing optical system projection optical system tiltedly below time, likely cause the external disturbance light such as the illumination light (electric light light) in room to incide photographing optical system by upper eyelid or upper eyelashes, like this, remain inadequate as the structure of device.
The present invention in view of the above problems, provides a kind of Ophthalmoligic instrument that can take good front eye cross section picture.
The means of dealing with problems
In order to address the above problem, the present invention has following feature.
Ophthalmoligic instrument of the present invention, the front eye cross section picture of shooting those who are investigated eyes, is characterized in that, this Ophthalmoligic instrument comprises: pedestal; Be fixed on forehead abutting part and jaw support on described pedestal, supporting those who are investigated head; Can be positioned in movably the main part on described pedestal, this main part is accommodated with: the mensuration system of measuring for the characteristic of the eyes to the those who are investigated that are supported; Take the first photographing optical system of the front eye full-faced photo of described those who are investigated's eyes; There is projection optical axis the projection optical system to tested eyes projection slit light; With the second photographing optical system, there is the shooting optical axis of reporting to the leadship after accomplishing a task with predetermined angular with described projection optical axis, and there is capture lens and capturing element that the front eye of shooting cross section looks like to use, described the second photographing optical system is arranged on the below of described projection optical system; This Ophthalmoligic instrument also has the first light-blocking member, it is arranged on the top of described main part or the main part side of described forehead abutting part top, incide described those who are investigated's upper eyelid or the stray light of upper eyelashes to block from the tiltedly front of described those who are investigated's head, there is the upper eyelid of front covering those who are investigated eyes from tiltedly and the structure of upper eyelashes.
Invention effect
According to the present invention, can take good front eye sectional view.
Brief description of the drawings
Fig. 1 (a), (b) are the outside drawings of the Ophthalmoligic instrument of present embodiment.
Fig. 2 arranges (storage) summary construction diagram in the optical system of determination unit inside.
Fig. 3 is the figure that shows determination unit and take the position relationship of unit, is also the summary construction diagram that is arranged at the optical system of the inside of taking unit simultaneously.
Fig. 4 (a), (b) are the figure that shows the captured cornea cross section picture of capturing element.
Fig. 5 shows the schematic configuration of fluid ejection mechanisms and the figure that wants portion of control system that are configured in determination unit.
Fig. 6 shows from obtaining cornea cross section picture to the flow chart of action that calculates corneal thickness.
Fig. 7 is the curve chart of the Luminance Distribution of display depth direction (Z direction).
Fig. 8 is the curve chart of the number of the profile of display depth direction.
Fig. 9 is the schematic diagram that the display frame of the monitor of the measurement result to showing corneal thickness value describes.
A part of outside drawing of (a) of Figure 10, the Ophthalmoligic instrument that (b) is the second embodiment.
Symbol description
1 pedestal
2 face's bearing units
2a forehead abutting part
2b jaw support
4 main parts
4a intraocular pressure determination unit
4b cornea cross section picture is taken unit
20 s operation control portions
38 photographing optical system
47 projecting lens
90a projection optical system
90b photographing optical system
91 light sources
96 capture lens
97 two-dimentional capturing elements
100 first light shielding parts
110 second light shielding parts
120 the 3rd light shielding parts
140 monitors
200 light shielding parts
Detailed description of the invention
Based on accompanying drawing, embodiments of the present invention are described below.Fig. 1 (a), (b) are the outside drawings of the Ophthalmoligic instrument that relates to of present embodiment, and (a) of Fig. 1 is that (b) of side view, Fig. 1 is axonometric chart.Again, the device of present embodiment is the tonometer (tonometer) of measuring the intraocular pressure of those who are investigated eyes with cordless, and takes cornea cross section picture as front eye cross section picture and measure the set composite of the corneal pachymetry (バ キ メ mono-タ) of the corneal thickness of those who are investigated's eyes with cordless.Again, in following explanation, using device (the main part 4 described later) direction that those who are investigated's eye E moves forward and backward relatively as Z direction (operating distance direction), using the direction of vertical relative Z direction and level as directions X (left and right directions), the direction of and plummet vertical with respect to Z direction is described as Y-direction (above-below direction).
Ophthalmoligic instrument has: pedestal 1, be arranged on face's (head) bearing unit 2 on pedestal 1, can be arranged on movably travelling carriage 3 on pedestal, can be arranged on movably the main part (determination unit) 4 on travelling carriage 3.Face's bearing unit 2 comprises with those who are investigated's forehead butt and to itself and the forehead abutting part 2a that supports, and with those who are investigated's lower jaw butt the Jaw support that it is supported (Jaw platform) 2b.Main part 4 holds measures intraocular pressure the intraocular pressure determination unit 4a using and the cornea cross section picture shooting unit 4b that takes cornea cross section picture.
Travelling carriage 3, by the operation of toppling over of action bars 5, moves in X and Z direction on pedestal 1.Main part 4, by the rotating operation of turning knob 5a, moves in Y-direction under the driving of the portion of Y-direction travel mechanism not showing at figure.Travelling carriage 3 moves relative to those who are investigated's eye E with main part 4, after completing with respect to the aligning of the main part 4 of those who are investigated's eye E, determination unit 4a is the state that is arranged on the frontal of those who are investigated's eye E, and taking unit 4b is the state that is arranged on the tiltedly lower direction of those who are investigated's eye E.
The top of action bars 5 is provided with to measure and starts switch 5b.Again, the rear of main part 4 (action bars 5 sides (examiner's side)) is provided with the monitor 140 of image, measurement result etc. for observation that shows those who are investigated eye E.
Fig. 2 is for arranging (holding) summary construction diagram in the optical system of determination unit 4a inside.Fig. 3 is the figure that shows determination unit 4a and take the position relationship of unit 4b, and is arranged on the summary construction diagram of the optical system of taking 4b inside, unit.
The nozzle 6 of fluid described later (air) injection equipment 60 is arranged on the front (face's bearing unit 2 sides (those who are investigated's eye E side)) of determination unit 4a.The top ends of nozzle 6 is arranged on the more position in front of front side framework face 4f than main part 4.Again, the top ends of shooting unit 4b is also arranged on the more position in front than framework face 4f.Like this, the operating distance of the relative those who are investigated's eye E of photographing optical system 90b shortens, and the diameter that is arranged on the lens of photographing optical system 90b can reduce.Again, the central axis L 1 of nozzle 6 is the mensuration axle of determination unit 4a, is approximate horizontal and configures.
Transparency glass plate 7 keeps nozzle 6, and makes from frontal is observed eye light used, detects the light transmission that light that alignment uses and detection corneal distortion shape are used.
The front eye full-faced photo of those who are investigated's eye E of throwing light on by infrared illumination source 30 is by half mirror 31, object lens 32, dichroic mirror 33, capture lens 37 and light filter 34 imaging on two-dimentional capturing element 35.Dichroic mirror 33 has through infrared light and reflects the characteristic of visible light.Light filter 34 has through the light of light source 30 and the light to mutatis mutandis infrared light supply 40 and interdicts the corneal distortion state-detection light of infrared light supply 50 and the characteristic of visible light.Again, the optical axis of this optical system is coaxial with mensuration axle L1.
From the light transmission projecting lens 41 of light source 40, reflected the eye E from front projection to those who are investigated by half mirror 31.The corneal reflex picture (bright spot) that is formed on the light source 40 of corneal vertex sees through half mirror 31, lens 32, dichroic mirror 33, lens 37 and light filter 34, imaging on two-dimentional capturing element 35.Based on the output signal of this capturing element 35, detect the alignment of X and Y-direction.Again, the optical axis of this optical system and mensuration axle L1 are coaxial.Again, lens 32, lens 37 and capturing element 35 form the photographing optical system 38 of taking front eye full-faced photo.
By admittedly projecting depending on sighting target the light transmission dichroic mirror 94 of consolidating sighting target 46 and the projecting lens 47 that throw light on visual light source 45, reflected by dichroic mirror 33, from front projection those who are investigated's eye E.Under the state of staring sighting target 46 admittedly, carry out the shooting of intraocular pressure determination and the cornea cross section picture of those who are investigated's eye E.Dichroic mirror 94 has through the light of light source 45 and reflects the characteristic of cornea cross section as the light of visual light source 91 for shooting.Again, the optical axis of this optical system is coaxial with mensuration axle L1.
Light from light source 50 becomes almost parallel light beam by collimating lens 51, from the oblique those who are investigated's eye E that projects to.By light transmission sensitive lens 52 and the light filter 53 of the corneal reflex of those who are investigated's eye E, reflected by the unidirectional glass 54 that sees through, by pin hole 5, received by photodetector 56.This corneal distortion state-detection optical system is set to, and in the time that the cornea of those who are investigated's eye E becomes the deformation state (flat form) of regulation, the light income of photodetector 56 is maximum.Again, the optical axis of this optical system and mensuration axle L1 intersect with predetermined angular.
Again, the double part of doing operating distance detection optical system of this corneal distortion state-detection optical system, corneal reflex from the light of light source 50 by those who are investigated's eye E, scioptics 52, light filter 53 and the unidirectional glass 54 that sees through, in the one dimension such as PSD, linear transducer dimension, position detecting element 57 places are subject to light.The words that those who are investigated's eye E moves in Z direction, because the light receiving position from the light of light source 50 in position detecting element 57 also changes, therefore according to the output signal of this position detecting element 57, detect the alignment (obtaining operating distance information) of Z direction.
Corneal thickness is measured optical system and is comprised, to form the cornea cross section light that looks like to use and project to by nozzle 6 the projection optical system 90a of those who are investigated's eye E, and the light by projection optical system 90a projection is subject to light and takes the photographing optical system 90b of cornea cross section picture from the reflected light of corneal reflex.Projection optical system 90a comprises, light source 91, collecting lens 92, slit plate 93, dichroic mirror 94, projecting lens 47, dichroic mirror 33 and object lens 32 taking directions X as length direction.Slit plate 93 is arranged on for example, position with near front eye (, corneal vertex) conjugation.Again, light source 91 for example use send centre wavelength be roughly 470nm, wave-length coverage is roughly the visual light source of the light (blue light) of 460～490nm.Again, lens 47 and 32 are arranged between light source 91 and nozzle 6, light optically focused on the cornea of those who are investigated's eye E that light source 91 is sent.Again, the optical axis of projection optical system 90a (projection optical axis) is coaxial with mensuration axle L1.
Photographing optical system 90b comprises two-dimentional capturing element 97, with the capture lens 96 and the completely reflecting mirror 98 that the reflected light of the cornea from those who are investigated's eye E being caused by projection optical system 90a are directed to capturing element 97, and take the cornea cross section picture of those who are investigated's eye E based on Sha Mupufuluke (ッ ャ イ Application プ Le one Network) principle.; the optical axis (shooting optical axis) of photographing optical system 90b is set to and the optical axis of the projection optical system 90a angle of intersection with regulation, and its optical arrangement is as follows: each elongated surfaces of the principal plane of the optical cross-section of the projection image of projection optical system 90a and capture lens 96 and the shooting face of capturing element 97 intersects with an intersection (axle).Again, photographing optical system 90b is arranged on the below of projection optical system 90a, and the light of projection optical system 90a can not covered by those who are investigated's nose.
Again, be provided with light filter 99 in the front of lens 96 (those who are investigated's eye E side), its only see through from light source 91 outgoing, for taking the light (blue light) of cornea cross section picture of those who are investigated's eye E.Like this, from light source 30, light source 50, light source 40, the each light source outgoing of light source 45, blocked by light filter 99 for the light of intraocular pressure determination and aligning, prevent that it from inciding capturing element 97.Light filter 99 can be arranged on from those who are investigated's eye E to the shooting light path of taking unit 97.
By collecting lens 92 optically focused, become slit light taking directions X as length direction by slit plate 93 from the light of light source 91.Slit light is reflected by spectroscope 94, and scioptics 47 become almost parallel light beam, and is reflected by spectroscope 33, is brought together, and sees through the unidirectional glass 31 that sees through, by the hollow bulb of nozzle 6 inner sides, at the cornea place of those who are investigated's eye E optically focused by object lens 32.Like this, form slit cross section picture by the slit light that sees through nozzle 6 at the cornea place of those who are investigated's eye E.The slit cross section picture being formed on the cornea of those who are investigated's eye E sees through light filter 99 and lens 96, is reflected by mirror 98, is taken by capturing element 97.Fig. 4 (a), (b) show the schematic diagram of the cornea cross section that photographs of capturing element 97 as D.Fig. 4 (a) represent cornea before, (b) of Fig. 4 represent cornea after.S operation control portion 20 carries out image processing by the cornea cross section to photographing as D, tries to achieve the corneal thickness (detailed narrates in the back) of those who are investigated's eye E.Now, as D at certain axial corneal thickness (for example can try to achieve cornea cross section, by the axial corneal thickness of CC), also can try to achieve corneal thickness (for example, trying to achieve the meansigma methods of multiple axial corneal thicknesses) from cornea cross section as D entirety.Again, corneal curvature is tried to achieve as D in the cornea cross section based on photographing by s operation control portion 20, and corneal thickness makes corrections.
Fig. 5 is the figure that wants portion that shows the schematic configuration and the control system that are arranged on the fluid ejection mechanisms 60 on determination unit 4a.The driving force of the rotary solenoid that fluid ejection mechanisms is not shown by figure, makes piston 62 (direction of arrow in figure) movement on compression direction in cylinder body 61, and thus, compressed air sprays to those who are investigated's eye E by nozzle 6.The detection signal that detects the pressure transducer 66 of the pressure in cylinder body 61 is input to s operation control portion 20, and tries to achieve intraocular pressure based on this.Transparent glass plate 65 forms the rear wall of cylinder body 61, and various light can be seen through.
Carry out device entirety the operation such as control, the computing of measured value s operation control portion 20 with measure beginning switch 5b, turning knob 5a, monitor 140, each light source 30,40,45,50,91, capturing element 35, photodetector 56, position detecting element 57, capturing element 97, pressure transducer 66, memorizer 24 etc. and be connected, carry out various control.
Then, explanation is for the stray light that incides photographing optical system 90b is carried out to the light shielding part that shading arranges.Be provided with the first light shielding part 100, the second light shielding part 110 and the 3rd light shielding part 120 in the front of main part 4.These light shielding parts are all set to, and in the time that main part 4 is aligned to the position relationship of regulation with respect to those who are investigated's eye E, stray light are carried out to shading.That is, the larger shaded effect of light shielding part is higher, but like this probability of the interference of measuring is also uprised.Thereby, in the present embodiment, determine that the position, shape of each light shielding part and size are only to make in the time that main part 4 is aligned to the position relationship of regulation with respect to those who are investigated's eye E, stray light does not incide photographing optical system 90b.Again, in the present embodiment, nozzle 6 doubles as the second light shielding part 110.
First, the first light shielding part (the first light-blocking member) 100 is described.The first light shielding part 100 is arranged on the top of main part 4, incide those who are investigated's upper eyelid or the stray light G1 of upper eyelashes with the tiltedly front of blocking those who are investigated's head from being supported by face's bearing unit 2, it has and is formed as the upper eyelid of front covering those who are investigated eye E from tiltedly and the structure of upper eyelashes.More particularly, the first light shielding part 100 is arranged on the front on the top of main part 4 as protuberance.Again, the surface in the front of the first light shielding part 100 forms along the framework surface 4f of main part 4.Like this, can make the height of the first light shielding part 100 less, guarantee the space between those who are investigated's eyelid E and main part 4.Again, the first light shielding part 100 is formed on the position higher than the top board 4c of main part 4, mainly the stray light advancing towards those who are investigated's upper eyelid and eyelashes from the axisymmetric direction of principal axis of pickup light of the projection optical axis with respect to projection optical system 90a and photographing optical system 90b is carried out to shading.
If there is no the first light shielding part 100, under the environment that disposes device (for example, be provided with the place of multiple electric lights), stray light G1 upper eyelid or on the reflected light of eyelashes be subject to light by taking light path P by capturing element 97, the reflection image (below referred to as reflection image GR) that stray light G1 causes is like this photographed (with reference to figure 4 (b)).Thereby, in the output image of capturing element 97, except cornea cross section is as D, also include reflection image GR.On the other hand, if stray light G1 shelters from by the first light shielding part 100, can take and there is no the good cornea cross section picture of (or considerably less) of reflection image GR (with reference to Fig. 4 (a)).
Again, the height of the first light shielding part 100 and transverse width (width of directions X), for example, decide by the occurrence degree of tentative confirmation reflection image GR under the aligning completion status of main part 4 relative those who are investigated's eyelid E.Again, the transverse width of the first light shielding part 100 (width of orthogonal horizontal direction with measuring axle), considers that examiner opens the easy degree of the eyelid of those who are investigated's eye E, and the transverse width that cans be compared to main part 4 is most narrow.
Be formed with the recess of opening easness 105 for improving those who are investigated's eye E at the two ends, left and right of the first light shielding part 100 again.Again, recess 105 is for example formed as, along the curve shape of examiner's hands or the shape of finger (, thumb).Like this, examiner's hands or finger can insert by recess 105, and the eyelid of those who are investigated's eye E is opened easily like this.Again, recess 105 can be formed on either party in the two ends, left and right of the first light shielding part 100.
Again, about the first light shielding part 100, be not limited to said structure, can consider the various distortion for blocking stray light G1.For example, the first light shielding part 100 can be formed as the form of forwards giving prominence to from framework surface 4f.But the first light shielding part 100 needs not and forehead abutting part 2a butt.Again, the surface of the front side of the first light shielding part 100 also can be formed as the form at the rear of framework surface 4f.But now, it is large that the height of the first light shielding part 100 need to become.
Then, the second light shielding part (the second light-blocking member) 110 is described.The second light shielding part 110 is arranged on the shooting unit 4b top of main part 4, blocks the stray light G2 that incides photographing optical system 90b from top., the second light shielding part 110 is formed as from framework surface 4f forwards outstanding.Again, the second light shielding part 110 is set to not interfere shooting light path P.In the present embodiment, although doubling as the second light shielding part 110, the second light shielding parts 110, nozzle 6 also can be arranged with 6 points, nozzle again.
Then, the 3rd light shielding part (the 3rd light-blocking member) 120 is described.The 3rd light shielding part 120 is arranged on the 4bLiang side, shooting unit of main part 4, and the stray light that incides photographing optical system 90b from side is carried out to shading., the 3rd light shielding part 120 is formed as from framework surface 4f forwards outstanding.Again, the 3rd light shielding part 120 comprises pair of right and left light shielding part 120R and light shielding part 120L, and is set to not interfere shooting light path P.
Again, in the present embodiment, owing to being provided with the second light shielding part 110 and the 3rd light shielding part 120 near of photographing optical system 90b, therefore can dwindle (lightproof area) size separately, guarantee the space between those who are investigated's eye E and main part 4.
For the first light shielding part 100, the second light shielding part 110 and the 3rd light shielding part 120, can consider the structure being integrally formed with main part 4 or the structure that can load and unload with respect to main part 4 etc. again.
About the device with said structure, its action is described.Examiner makes those who are investigated's head rest supporting on face's bearing unit 2.Now, as shown in Figure 1, eye E is positioned at and the position that is formed on the eye-level labelling equal height on face's bearing unit 2.,, carry out the aligning of main part 4 with respect to those who are investigated's eye E according to the alignment information operating operation bar 5 being presented on monitor 140 thereafter.Carry out the aligning of X and Y-direction, the corneal reflex picture that makes light source 40 and the position relationship that is presented at reticle that the figure on monitor 140 do not show and forms regulation.The aligning of Z direction is that the alignment (operating distance information) of the Z direction based on being obtained by position detecting element 57 carries out according to the operating distance index being presented on monitor 140.Again, can be with reference to No. 7-23907, Japanese patent laid-open of the applicant etc. about the detailed description of such aligning.By the testing result mobile agent portion 4 of the alignment based on X, Y and Z direction, can automatically carry out the aligning of main part 4 relative those who are investigated's eye E again.
The testing result of alignment of s operation control portion 20 based on obtain X, Y and Z direction from capturing element 35 and position detecting element 57 judged while aligning, automatically send and measure the triggering signal (or by switch 5b input triggering signal) starting, to start the shooting of intraocular pressure determination and cornea cross section picture.
Measure the triggering signal one starting and send, 20 bright light source of s operation control portion 91 are also taken cornea cross section picture with capturing element 97, and are stored in storage part 24.Again, the solenoid that driving figure does not show also passes through the air in piston 62 compression cylinders 61, and be ejected into those who are investigated's eye E by nozzle 6.The cornea of those who are investigated's eye E is compressed the injection of air and is slowly out of shape.Light from light source 50 is subject to light by the reflected light of corneal reflex by photodetector 56, the deformation state of cornea detects in s operation control portion 20 based on the output signal of photodetector 56, the output signal of the pressure transducer 66 while arriving state of applanation based on cornea is tried to achieve intraocular pressure value.
Again, the corneal thickness of those who are investigated's eye E is tried to achieve in the cornea cross section that s operation control portion 20 stores based on memorizer 24 as D, and corneal thickness correction intraocular pressure value based on obtaining.
Herein, the situation of the corneal thickness to the photographic images mensuration those who are investigated eye E based on exporting from capturing element 97 is elaborated.Fig. 6 is after demonstration obtains cornea cross section picture till calculate the flow chart of the action of corneal thickness, and Fig. 4 (a), (b) are the skeleton diagrams that obtained cornea cross section is looked like to describe.(a) of Fig. 4 for obtained do not have the good cornea cross section of reflection image GR as time figure.(b) of Fig. 4 for show described stray light G1 from upper eyelid or the figure of the reflected light of the eyelash reflex cornea cross section picture while inciding capturing element 97.In Fig. 4 (b), cornea cross section is as the reflection image GR picture of the front of D (paper top), is that by the stray light G1 of the first light shielding part 100 shadings, the reflected light during by upper eyelid or upper eyelash reflex is not caused.Again, although more than reflection image GR can prevent to a certain degree by above-mentioned light shielding part 100, the configuration surroundings of device etc. also may cause its generation.
Light quantity distribution in the output image of s operation control portion 20 based on capturing element 97 detects each profile information of the front and back of cornea, and measures the corneal thickness of those who are investigated's eye E based on the each profile information detecting.Now, the position of facies anterior cornea and facies posterior corneae is detected by s operation control portion 20 based on the profile information detecting, and calculates corneal thickness according to the position relationship of front and back.
More specifically, s operation control portion 20 processes based on being stored in cornea cross section in storage part 24 limit (profile) of detecting facies anterior cornea and facies posterior corneae by image as D, and the detection position on limit based on detecting calculates corneal thickness.
First, s operation control portion 20 obtains the profile in facies anterior cornea (cornea outside).S operation control portion 20 is in cross-sectional image data, for each Luminance Distribution that calculates depth direction (Z direction) at directions X scanning line arranged side by side (pixel column).Then, the slope (Pour I of the Luminance Distribution of each scanning line detects in s operation control portion 20 according to each pixel unit), and detect the location of pixels Gk (with reference to Fig. 7) sharply rising.Again, if there is no reflection image GR, rising rapidly in Luminance Distribution is corresponding with the reflected light from facies anterior cornea.Then, s operation control portion 20, by location of pixels Gk is arranged by each scanning line, can obtain the positional information of the profile of facies anterior cornea.
In above-mentioned record, the slope of each location of pixels, tries to achieve by the approximation of utilizing difference to calculate the differential value of the pixel of adjacency.Again, location of pixels Gk detects by the location of pixels (location of pixels when location of pixels, slope when slope is maximum in ascent direction meets setting) that specifies the slope with the benchmark that meets regulation.
The profile that detects facies anterior cornea at the photographic images to shown in Fig. 4 (b), likely can mistakenly reflection image GR be extracted out as facies anterior cornea again.Again, due to the reason of the upper eyelid in generation source from as reflection image GR or the reflected light of upper eyelashes (light at random), the rising of the Luminance Distribution corresponding with facies anterior cornea (with the decline of Luminance Distribution corresponding to facies posterior corneae) becomes mitigation, thereby the accuracy of detection of corneal thickness declines.
Therefore, s operation control portion 20, output image based on capturing element 97 is differentiated the first light quantity distribution being formed by the reflected light of the cornea from those who are investigated's eye E and the second light quantity distribution being formed by the reflected light of the upper eyelid from those who are investigated's eye E and upper eyelashes, and detects the profile information based on the first light quantity distribution.
Herein, s operation control portion 20, obtaining (not being) after the profile of facies anterior cornea, judges whether photographic images has reflection image GR (interference that whether has stray light to cause) simultaneously.In the time that s operation control portion 20 has been judged to be reflection image GR, extract the image that is equivalent to reflection image GR part, from view data, remove.
More specifically, as the first differentiation processing, s operation control portion 20, for each, at directions X scanning line arranged side by side, whether the Luminance Distribution of judging Z direction is more than the threshold value Rs of regulation, and according to this result of determination detection of reflected having or not as GR., if there be the location of pixels of brightness value more than threshold value Rs, be judged to be reflection image GR herein, if there is no the location of pixels of brightness value more than threshold value Rs, being judged to be does not have reflection image GR.
Now, the maneuver of expecting for example has, and brightness degree is represented by 0～255 gray scale, by threshold value Rs being set as to 255 gray scales, determining whether having the saturated part of brightness degree.Again, region division threshold value Rs that also can brightness degree is higher in 0～255 gray scale.
For above-mentioned judgment standard, when being judged to be there is no reflection image GR, skip the step of removing reflection image GR, go to next step.On the other hand, in the situation that being judged to be reflection image GR, s operation control portion 20, is transformed to 0 by the brightness value of the pixel of the depth location corresponding with the light quantity distribution that is formed on photographing optical system 90b side compared with this light quantity distribution with the light quantity distribution of the brightness value more than having threshold value Rs., the light quantity distribution being produced by stray light G1 is removed by s operation control portion 20.Like this, can process the composition of removing reflection image GR from cross-sectional image data by image.Afterwards, go to next step.Now, s operation control portion 20 is considered as the light quantity distribution that only has the brightness value lower than threshold value Rs on the mountain (light quantity distribution) of corneal reflex picture, the light quantity distribution with brightness value more than threshold value Rs is considered as to the mountain of stray light.
Then, s operation control portion 20 obtains in step at the profile of described facies anterior cornea, determines whether and can suitably obtain profile.The quantity of the scanning line that s operation control portion 20 instrumentation profiles have suitably been obtained, and judge instrumentation to the quantity of scanning line whether exceed specified quantity (for example, 1/3 of all scanning line quantity).In the time having obtained the quantity of scanning line of profile and exceed specified quantity, be judged to be OK, and go to next step.
On the other hand, in the time that the scanning line of having obtained profile is below specified quantity, be judged to be insufficient.Now, s operation control portion 20 makes to decline for the sensitivity of the shooting signal of exporting from capturing element 97, and takes once again cross section picture, and photographic images is stored in storage part 24.Now, s operation control portion 20, the setting while shooting relatively at first, in the setting of taking next time, reduces the gain (changing CCD sensitivity) for the shooting signal of exporting from capturing element 97.Again, the slippage of gain is pre-stored at storage part 24.Now, the 20 successive adjustment gains of s operation control portion, until photographic images meets the benchmark of regulation.
Again, in the present embodiment, the light quantity of sending from measuring light source (projection light source), is set as not making those who are investigated to feel dazzling lower light quantity, must be higher by the gain setting of capturing element 97.The impact of light like this, is easily interfered.
Therefore, when stray light detected on capturing element 97 time, by the gain of capturing element 97 being dropped to feasible value, reduce the fuzzy stray light composition in limit that makes cornea cross section picture.Again, while having reduced gain, the brightness degree of cornea cross section picture is than in the low situation of setting, and s operation control portion 20 can only promote by increasing the output level of projection light source the brightness of cornea cross section picture.
Again, while shooting once again, in the time being set as measuring the triggering signal output that starts one time, take the single screening-mode of a width cross section picture, s operation control portion 20 is in the time having exported for the second time triggering signal, to obtain cross section picture than the low gain of gain of taking for the first time.Again, take the continuous photographing mode of several cross section pictures in the case of being set as measuring when the triggering signal starting is exported one time, s operation control portion 20, in twice later shooting, to obtain cross section picture than the low gain of gain of taking for the first time.
Then, s operation control portion 20, for again taking the cornea cross section picture that obtains, just with initial cornea cross section as, the profile that carries out successively facies anterior cornea is obtained, the judgement having or not of reflection image GR and the judgement obtaining of profile.Herein, after for the second time, profile is obtained in the situation into NG, and s operation control portion 20 shows the message (for example, ERROR) that represents that mensuration is wrong on monitor 140.
In above-mentioned steps, obtain as OK in the case of being judged to be the profile of facies anterior cornea, s operation control portion 20, employing method of least square etc. carries out process of fitting treatment (regression analysis) to the profile information of the facies anterior cornea of extracting out, calculates the regression curve of facies anterior cornea curve.
Then, the number of profile on the depth direction shown in Fig. 8, by the number in the profile of described facies anterior cornea being carried out to instrumentation at directions X, is tried to achieve by s operation control portion 20.In Fig. 8, transverse axis represents the location of pixels of depth direction, and the longitudinal axis is illustrated in the number of the profile that each location of pixels obtains.
Herein, s operation control portion 20, differentiates the first light quantity distribution and the second light quantity distribution by the relative position relation on capturing element 97, processes as the second differentiation of differentiating the first light quantity distribution and the second light quantity distribution using this.Herein, s operation control portion 20 is detected the caused mountain of the number of profile, and is determined with the not reflection image GR for cross section picture according to the number on mountain.Detecting mountain in the situation that, s operation control portion 20, can by test example respectively as, rise, peak value (from the position of rising and changing minimizing into) and decline and detect a mountain.
Herein, s operation control portion 20, is one on the mountain detecting, this mountain is considered as to the mountain that looked like to cause by corneal reflex, thereby is judged to be not have reflection image GR.On the other hand, s operation control portion 20 as shown in Figure 8, be two on the mountain detecting, mountain HG1 far away relative photographing optical system 90b is considered as to the mountain that corneal reflex looks like to cause, mountain HG2 nearer relative photographing optical system 90b is considered as to the mountain that reflection image GR causes, has been judged to be reflection image GR.
Then, s operation control portion 20 is in the situation that being judged to be there is no reflection image GR, and the profile information based on extracting out calculates regression curve.On the other hand, in the situation that being judged to be reflection image GR, s operation control portion 20, based on being regarded as the profile information of corneal reflex as caused mountain, calculates regression curve.Now, the profile information that is regarded as the caused mountain of reflection image GR is excluded outside the calculating of regression curve.
Then, s operation control portion 20 obtains the profile of facies posterior corneae (cornea inner side).Now, the slope of the Luminance Distribution of each scanning line detects in s operation control portion 20 according to each pixel unit, has to detect the location of pixels Gb declining rapidly.Again, the decline rapidly in Luminance Distribution, corresponding with the reflected light from facies posterior corneae.Now, s operation control portion 20 can be according to the facies anterior cornea position than calculating as described above the light quantity distribution of more close ophthalmic side (optical fundus side) detect location of pixels Gb.Then, s operation control portion 20, by location of pixels Gb is arranged by each scanning line, obtains the profile information of facies posterior corneae position.Again, for the adquisitiones of profile, owing to can adopting the method identical with facies anterior cornea, therefore omit detailed explanation.
Then, s operation control portion 20, obtains in step at the profile of aforesaid facies posterior corneae, determines whether and can suitably obtain profile.Again, in the judgement obtaining at profile, owing to can adopting the method identical with judgement for facies anterior cornea, therefore its detailed description is omitted., exceed specified quantity if obtained the quantity of the scanning line of profile herein, be judged to be OK, enter next step.On the other hand, if the quantity of scanning line that has obtained profile is below specified quantity, be judged to be insufficient.Now, s operation control portion 20 shows the message that represents that mensuration is wrong on monitor 140.
In above-mentioned steps, the profile that is judged to be facies posterior corneae is obtained in the situation into OK, the regression equation of the profile information employing method of least square of s operation control portion 20 to the facies posterior corneae of extracting out etc. carries out process of fitting treatment (regression analysis), calculates the regression curve of facies posterior corneae curve.
Afterwards, s operation control portion 20, near near the scanning line by (picture centre) CC, calculates the distance between facies anterior cornea curve and facies posterior corneae curve, and calculates corneal thickness value based on operation result.Now, also can calculate according to facies anterior cornea curve the curvature of facies anterior cornea, and based on this corneal curvature correction corneal thickness value.Then, s operation control portion 20 is presented at the corneal thickness value obtaining on monitor 140.
According to the above, avoided appearing at cornea cross section as the front of D, by upper eyelid or under the state of impact of the stray light that causes of the reflected light of eyelashes, corneal thickness is measured.Again, even in the time that main part 4 changes with respect to the operating distance of those who are investigated's eye E, owing to differentiating as D and reflection image GR in corneal cross section, therefore can measure accurately corneal thickness.
Again, in said structure, reflection image GR composition has been removed by image processing by s operation control portion 20, also can detect according to the Luminance Distribution of the pixel on the corresponding depth location in the mountain of causing with corneal reflex picture the profile of cornea front-back.
In differentiating reflection image GR picture cornea cross section that corneal reflex light causes causing as D and stray light, be not limited to said method again.For example, s operation control portion 20, near the peak (from the position of rising and changing minimizing into) of the light quantity distribution of depth direction detection CC.Then, in the situation that detecting two peak values, differentiate for relative photographing optical system 90b peak value far away be the peak value that corneal reflex picture causes.Now, according to the profile that is judged as corneal reflex and detects as near the light quantity distribution peak value of caused peak value cornea front-back.Again, as other method, the photographic images of capturing element 97 is carried out to edge extraction's processing, the edge of the curve with approximate cornea curve shape is judged to be to corneal reflex as caused, the edge with inhomogeneous substantially elliptical shape is judged to be to stray light caused.Thereby detect as the profile of cornea front-back as the edge at caused edge being judged as by corneal reflex.
In the time detecting the profile of cornea front-back, except rim detection, also can, by carrying out binary conversion treatment with the brightness value of regulation, detect the profile of cornea front-back again.
Again, in the above description, be illustrated as an example of the situation of measuring corneal thickness example, but be also applicable to, detect each profile information of facies anterior cornea and anterior surface of lens according to the photographic images of front eye, and measure the situation of the anterior chamber depth of those who are investigated's eyes based on the each profile information detecting.
Afterwards, s operation control portion 20 is presented at intraocular pressure value and corneal thickness measured value after correction on monitor 140.Measure wrong measured value and reach specified quantity (for example three) afterwards, intraocular pressure determination finishes having removed.
Fig. 9 is the figure that the display frame of the monitor 140 of the measurement result to showing corneal thickness value describes, and (a) of Fig. 9 shows the photographic images of capturing element 97, and (b) of Fig. 9 is the display frame of monitor 140.Thumbnail shows that SN is the result that export on the picture of monitor 140 as D in cornea cross section that photographing optical system 90b obtains.The first measurement result 400 has been listed the corneal thickness value and the meansigma methods that are measured to as described above.The second measurement result 500 has been listed the intraocular pressure value and the meansigma methods that are measured to as described above.Herein, the thumbnail on the picture of monitor 140 shows that the viewing area of SN, measurement result 400 and measurement result 500 is determined in advance.Here, thumbnail shows that the viewing area HR1 of SN is set at the picture top of monitor 140, the viewing area HR2 of measurement result 400 is set at the picture central part of monitor 140, and the viewing area HR3 of measurement result 500 is set at the picture bottom of monitor 140.Again, thumbnail demonstration SN, measurement result 400 and measurement result 500 are observed as overlapping demonstration with respect to eye exporting from capturing element 35.
When carrying out thumbnail demonstration SN, the outline position of the cross section picture that the photographic images of capturing element 97 comprises detects in s operation control portion 20, and outline position based on detecting, be set in and on monitor 140, show the viewing area that thumbnail is used with respect to photographic images.Then, s operation control portion 20 cuts the view data corresponding with the viewing area setting, and shows the thumbnail SN of cross section picture on monitor 140.
More specifically, s operation control portion 20 resolves the photographic images being stored in storage part 24, except calculating corneal thickness, also calculates the cornea position of depth direction.Cornea position, for example, in the time extracting the profile of cornea out, can for example, calculate according to the position of cornea (, cornea front-back) detected near near the scanning line of the depth direction by (corneal vertex) picture centre.
Then, s operation control portion 20, for the photographic images being stored in storage part 24, sets the viewing area DR showing as thumbnail demonstration SN, and cuts (extraction) view data corresponding with viewing area DR.Again, the 20 set and display region DR of s operation control portion, make cornea cross section be arranged on DR center, viewing area as D.
Now, s operation control portion 20 is set as reference position (center) K by the cornea cross section of obtaining as described above as the outline position in D, and set and display region DR makes reference position K become DR center, viewing area.Now, from respect to reference position K forwardly (picture top) add the location of pixels of ormal weight Gu, add that to (below picture) in the wings the view data of the location of pixels of ormal weight Gd is set to viewing area DR.
Then, s operation control portion 20 dwindles the size of processing with corresponding viewing area HR1 to extracted view data, then shows using the view data of dwindling as thumbnail that SN outputs to monitor 140.
Like this, even obtained cornea cross section is as D when the aligning of main part 4 relative those who are investigated's eye E has deviation, also can show good thumbnail.Owing to can dwindle viewing area in the time showing the thumbnail of cornea cross section picture, therefore can together show with measured value again.
Again, in the above description, although show the thumbnail of cornea cross section as D, for eye cross section picture before taking and measure the Ophthalmoligic instrument of anterior chamber depth, can be in showing the measurement result of anterior chamber depth, thumbnail shows the front eye cross section picture that comprises cornea and anterior surface of lens.Now, detect at least one in the outline position of cornea or the outline position of anterior surface of lens, and based on this outline position, photographic images is set to the viewing area for carrying out thumbnail demonstration.Now, the variation that need to consider the caused cornea of anterior chamber depth of those who are investigated's eyes and the distance of anterior surface of lens comes set and display region.
Then, the second embodiment of the present invention is described.Figure 10 (a), (b) are the outside drawing of a part for the Ophthalmoligic instrument of the second embodiment, and (a) of Figure 10 is a part of side view, and (b) of Figure 10 is a part of axonometric chart.Again, the device that the second embodiment relates to is that axiallength meter (バ イ ォ メ mono-タ), eyes index meter (レ Off ラ Network ト メ mono-タ) etc. are measured the Ophthalmoligic instrument of eyes characteristic and the set composite of the anterior chamber depth meter of the anterior chamber depth of the front eye of shooting cross section picture mensuration those who are investigated eyes.For the parts that added the label identical with Fig. 1, if not otherwise specified, there is identical function and structure again.
The top of forehead abutting part 2a is provided with light shielding part (light-blocking member) 200.Light shielding part 200 for block from those who are investigated's upper eyelid or the stray light G1 of tiltedly upper front incident of eyelashes, and incide the stray light G2 of photographing optical system 90b from top.; light shielding part 200 comprises the first lightproof area 210 and the second lightproof area 220; the first lightproof area 210 is formed as in order to block stray light G1 covering the upper eyelid of those who are investigated's eyes and the structure of eyelashes from oblique front, and the second lightproof area 220 is formed as covering from top the structure of photographing optical system 90b in order to block exterior light G2.Again, left eye lightproof area 200L when light shielding part 200 comprises the mensuration that is mainly used in those who are investigated's left eye, and be mainly used in those who are investigated's eyes measure time right eye lightproof area 200R.
Light shielding part 200 is to be bent into cross section to be the roughly dark slide of L word shape, has short leg (roughly vertical plate) 200a and long leg (approximate horizontal plate) 200b.The installing component that light shielding part 200 does not show by figure such as screws is connected with forehead abutting part 2a, and short leg 200a is configured to and XY plane almost parallel, and thus, long leg 200b is configured to XZ face rearward outstanding substantially in parallel., light shielding part 200 is releasably arranged on forehead abutting part 2a.Again, consider those who are investigated's eye E eyelid open easness, the transverse width of short leg 200a is than the transverse width of long leg 200b short (forming recess by forehead abutting part 2a and light shielding part 200).
Again, under the state that the aligning of those who are investigated's eye E is completed, the top ends that light shielding part 200 is formed as making light shielding part 200 (long limit 200b) at least with respect to the framework surface configuration than main part 4 in main part 4 sides.Now, growing the length of limit 200b can be by tentatively confirming by the captured cornea cross section of capturing element 97 as having or not reflection image GR to try to achieve in D.Now, consider that the examiner who is positioned at monitor side, to the observation easness of those who are investigated's eye E, is preferably set as suitable length.
Again, the transverse width of light shielding part 200, for example, decide by the occurrence degree of tentatively confirming reflection image GR under the aligning completion status of main part 4 relative those who are investigated's eye E.Again, for no matter the interpupillary distance of those who are investigated's eyes looks like to carry out good shooting to the front eye cross section of those who are investigated's eyes, the banner of light shielding part 200 can be by tentatively confirming main part 4 two moving the reflection image GR of limit positions vicinity a situation arises and decide on directions X.Again, consider the easness of opening of the eyelid of examiner to those who are investigated's eye E, preferably narrow than the transverse width of main part 4 (or transverse width of forehead abutting part 2a).
Again, light shielding part 200 is formed as, and when main part 4 moves to the upper limit position of Y-direction, long limit 200b is configured in the position higher than the upper surface of main part 4.Like this, can avoid contacting of light shielding part 200 and main part 4.
According to the second above-mentioned embodiment, examiner, by the space between light shielding part 200 and main part 4, can easily confirm the state of those who are investigated's eyelid E.Can easily open the eyelid of those who are investigated's eye E again.
Again, due to light shielding part 200 can be on forehead abutting part 2a installing/dismounting, therefore examiner can determine whether use light shielding part 200 according to the environment for use of device.Again, as light shielding part 200 can be on forehead abutting part 2a the structure of installing/dismounting, be not limited to above-mentioned installing component, all formations such as the bonding agent that also can adopt Magnet, can load and unload.
For blocking the first light shielding part of stray light G1, although can be arranged on the top of main part 4 or forehead abutting part 2a, do not need to be arranged on the top of main part 4 or forehead abutting part 2a again.For example, also can be configured to the first light shielding part is arranged on left side or the right flank of main part 4 and extends to main part 4 or the top of forehead abutting part 2a.Also can be arranged on forehead abutting part 2a for the 3rd light shielding part that blocks stray light G3 again.Now, be not in contact with it as long as move limit positions main part 4 at two of the directions X of main part 4.
Claims (6)
1. an Ophthalmoligic instrument, this Ophthalmoligic instrument is taken the front eye cross section picture of those who are investigated's eyes, it is characterized in that, and this Ophthalmoligic instrument comprises:
Pedestal;
Be fixed on forehead abutting part and jaw support on described pedestal, supporting those who are investigated head;
Can be positioned in movably the main part on described pedestal,
This main part is accommodated with:
The mensuration system of measuring for the characteristic of the eyes to the those who are investigated that are supported;
Take the first photographing optical system of the front eye full-faced photo of described those who are investigated's eyes;
There is projection optical axis the projection optical system to those who are investigated's eyes projection slit light; With
The second photographing optical system, has the shooting optical axis intersecting with predetermined angular with described projection optical axis, and has capture lens and capturing element that the front eye of shooting cross section looks like to use, and described the second photographing optical system is arranged on the below of described projection optical system;
This Ophthalmoligic instrument also has the first light-blocking member, it is arranged on the top of described main part or the main part side of described forehead abutting part top, with block from described those who are investigated's head tiltedly front incide described those who are investigated's upper eyelid or the stray light of upper eyelashes, there is front from tiltedly and cover the upper eyelid of those who are investigated's eyes and the structure of upper eyelashes, and the transverse width of described the first light-blocking member is narrower and small than the transverse width of described main part
The second light-blocking member, it is arranged on the top of described the second photographing optical system, blocks the stray light that incides described the second photographing optical system from the top of described Ophthalmoligic instrument;
Wherein said mensuration system comprises that described nozzle is positioned at the top of described the second photographing optical system to the nozzle of described those who are investigated's eyes jet compression air, and described nozzle doubles as described the second light-blocking member.
2. Ophthalmoligic instrument as claimed in claim 1, is characterized in that, also has:
The 3rd light-blocking member, it is arranged on the side of described the second photographing optical system, blocks the stray light that incides described the second photographing optical system from the side of described Ophthalmoligic instrument.
3. Ophthalmoligic instrument as claimed in claim 1, is characterized in that, described the first light-blocking member is arranged on those who are investigated's eyes upper lateral part of described main part or the main part upper lateral part of described forehead abutting part.
4. Ophthalmoligic instrument as claimed in claim 1, is characterized in that,
Also have s operation control portion, the profile information of described front eye detects in described s operation control portion according to the output image of described capturing element, and measures the size at the regulation position of described front eye based on the profile information detecting;
Described s operation control portion is based on described output image, the first light quantity distribution that the reflected light of the cornea by from described those who are investigated's eyes is formed and by the described stray light not sheltered from by described the first light-blocking member from the upper eyelid of described those who are investigated's eyes or second light quantity distribution that reflected light formed of eyelash reflex differentiate, and detect the profile information of described front eye based on described the first light quantity distribution.
5. Ophthalmoligic instrument as claimed in claim 4, it is characterized in that, any one in the relative position information between monochrome information, contour shape information and the light quantity distribution of the light quantity distribution in the output image of described s operation control portion based on described capturing element differentiated described the first light quantity distribution and described the second light quantity distribution.
6. Ophthalmoligic instrument as claimed in claim 4, is characterized in that, described s operation control portion, by shot detection for the first time during to described the second light quantity distribution, in taking for the second time, the setting when taking for the first time, reduces the gain of the output signal of described capturing element.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008312754A JP5242356B2 (en) | 2008-12-08 | 2008-12-08 | Ophthalmic equipment |
| JP2008-312754 | 2008-12-08 | ||
| JP2008312753A JP5255417B2 (en) | 2008-12-08 | 2008-12-08 | Ophthalmic equipment |
| JP2008-312753 | 2008-12-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101744605A CN101744605A (en) | 2010-06-23 |
| CN101744605B true CN101744605B (en) | 2014-07-30 |
Family
ID=42365473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910254019.8A Active CN101744605B (en) | 2008-12-08 | 2009-12-08 | Ophthalmological device |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR101568425B1 (en) |
| CN (1) | CN101744605B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101405486B1 (en) * | 2012-04-05 | 2014-06-13 | 주식회사 포스코 | Method for manufacturing lithium hydroxide and method for manufacturing lithium carbonate using the same |
| KR101538678B1 (en) * | 2013-11-14 | 2015-07-22 | 최승우 | Device for measuring the muscular strength of eyelid |
| CN104720740B (en) * | 2015-04-02 | 2016-08-17 | 深圳市莫廷影像技术有限公司 | Utilize slit-lamp angle measurement film curvature distribution and the method for thickness distribution |
| JP2020507386A (en) | 2017-02-01 | 2020-03-12 | ルーティーヘルス，インク． | Retinal photographing apparatus and retinal photographing method using the same |
| US11285334B2 (en) * | 2018-03-29 | 2022-03-29 | Lumenis Be Ltd. | Apparatus and method for treatment of dry eyes |
| KR20200015049A (en) * | 2018-08-02 | 2020-02-12 | (주)제이티 | Slit light source and vision inspection apparatus having the same |
| CN112060052B (en) * | 2020-09-16 | 2022-02-08 | 宁波市眼科医院 | Robot equipment capable of automatically optometry and corneal curvature detection |
| CN113576396B (en) * | 2021-07-30 | 2023-11-24 | 中山大学中山眼科中心南昌眼科医院 | Device for evaluating removal amount of cornea in refractive surgery through optical coherence elastography |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5889576A (en) * | 1997-06-30 | 1999-03-30 | Nidek Co., Ltd. | Ophthalmic apparatus |
| CN1868397A (en) * | 2005-05-26 | 2006-11-29 | 株式会社拓普康 | Ophthalmic apparatus |
| EP1779771A1 (en) * | 2005-11-01 | 2007-05-02 | Nidek Co., Ltd | Ophthalmic apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4606069B2 (en) * | 2004-06-11 | 2011-01-05 | 興和株式会社 | Ophthalmic measuring device |
| JP4863676B2 (en) * | 2005-09-22 | 2012-01-25 | 興和株式会社 | Ophthalmic equipment |
-
2009
- 2009-12-08 CN CN200910254019.8A patent/CN101744605B/en active Active
- 2009-12-08 KR KR1020090120941A patent/KR101568425B1/en active IP Right Grant
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5889576A (en) * | 1997-06-30 | 1999-03-30 | Nidek Co., Ltd. | Ophthalmic apparatus |
| CN1868397A (en) * | 2005-05-26 | 2006-11-29 | 株式会社拓普康 | Ophthalmic apparatus |
| EP1779771A1 (en) * | 2005-11-01 | 2007-05-02 | Nidek Co., Ltd | Ophthalmic apparatus |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2005-348975A 2005.12.22 |
| JP特开2007-82732A 2007.04.05 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20100066391A (en) | 2010-06-17 |
| CN101744605A (en) | 2010-06-23 |
| KR101568425B1 (en) | 2015-11-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101744605B (en) | Ophthalmological device | |
| CN104799810B (en) | Optical coherence tomography equipment and its control method | |
| CN100528071C (en) | Alignment method for ophthalmic measurement apparatus and alignment device of the same | |
| CN101040776B (en) | A fundus observation device | |
| US8534836B2 (en) | Fundus camera | |
| JP4174126B2 (en) | Ophthalmic measuring device | |
| JPH06142044A (en) | Ophthalmic measuring apparatus | |
| JP5242356B2 (en) | Ophthalmic equipment | |
| KR20040025564A (en) | Noncontact tonometer | |
| JP5255417B2 (en) | Ophthalmic equipment | |
| JP4233439B2 (en) | Ophthalmic equipment | |
| JP4469205B2 (en) | Ophthalmic equipment | |
| JPH07171113A (en) | Ophthalmologic instrument | |
| JP3576656B2 (en) | Alignment detection device for ophthalmic instruments | |
| JPH11225966A (en) | Ophthalmologic measurement device | |
| JP5998848B2 (en) | Ophthalmic equipment | |
| US8870378B2 (en) | Ophthalmic measurement device | |
| JP2012100712A (en) | Ophthalmologic measurement apparatus | |
| JP4136096B2 (en) | Ophthalmic equipment | |
| JP2942304B2 (en) | Eye refractive power measuring device | |
| JPH02252432A (en) | Eye refractivity measuring apparatus | |
| JP2806437B2 (en) | Eye refractive power measuring device | |
| JP2000041950A (en) | Tonometer | |
| JP2817795B2 (en) | Eye refractive power measuring device | |
| JPH02264630A (en) | Eye refracting power measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |