CN105996978A - Multi-color light scanning eye ground imaging device - Google Patents
Multi-color light scanning eye ground imaging device Download PDFInfo
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- CN105996978A CN105996978A CN201610288433.0A CN201610288433A CN105996978A CN 105996978 A CN105996978 A CN 105996978A CN 201610288433 A CN201610288433 A CN 201610288433A CN 105996978 A CN105996978 A CN 105996978A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/12—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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/14—Arrangements specially adapted for eye photography
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Abstract
The invention discloses a multi-color light scanning eye ground imaging device. The multi-color light scanning eye ground imaging device include a control module, a single-color light beam generation device, a light path reflection unit, a scanning unit, a collecting lens, an imaging lens, and an imaging unit; the single-color light beam generation device generates at least two different types of single-color light beams; the single-color light beams periodically and alternatively enter the light path reflection unit under the control of the control module, are reflected to the scanning unit through the light path reflection unit, and then enter human eyes through the collecting lens; the scanning unit uses the single-color light beams to scan an eye ground, and the single-color light beams carrying with eye ground information returns from the eye ground and finally form an image on the imaging unit; the control module controls the imaging unit to acquire eye images obtained in different scanning modes, the eye images are processed to obtain different grey images, and the grey images facilitate eye ground examination of patients having disease zones which can be distinguished through reflect light colors; and meanwhile, the obtained the eye ground images scanned by different single-color light beams are synthesized into the multi-color eye ground image.
Description
Technical field
The present invention relates to ophthalmology imaging device fields, scan particularly with regard to utilizing multiple monochromatic line light beam
Optical fundus, obtains different eye fundus images, obtains different one-tenth gray-scale map after treatment, and utilizes this one-tenth gray-scale map
The technical field of the pathological changes at the detection a certain position of human eye.
Background technology
At present Ophthalmologic apparatus can be used for optical fundus white light imaging with regard to fundus camera, but there is imaging in fundus camera
The defects such as definition is not enough, are unfavorable for the diagnosis of trickle disease, and Line-scanning Image Acquisition System have higher one-tenth
As resolution, image contrast and image quality.But the light source of current Line-scanning Image Acquisition System is generally adopted
With near-infrared light source, compared to the white light source in fundus camera, it becomes gray-scale map to be unfavorable for that some can pass through
Reflective color distinguishes the examination of ocular fundus of the patient in disease region, this is because, human ocular tissues is to different monochromes
Line source has different absorbabilities.Therefore, fundus camera and Line-scanning Image Acquisition System each have oneself
Pluses and minuses, it is impossible to meet eye detection needs.
Summary of the invention
The present invention provides a kind of many multi-color cords to scan fundus imaging equipment, the control module control that this equipment is within it put
Under system, with the monochromatic line light beam periodically alternate sweep optical fundus that at least two is different, obtain different optical fundus figures.
Technical scheme:
A kind of many multi-color cords scanning fundus imaging equipment, including: control module, monochromatic line light-beam generator,
Light path reflector element, scanning element, condenser lens and image-generating unit；
Described monochromatic line light-beam generator generates at least two difference monochromatic line light beam；The two difference list
Colo(u)r streak light beam, under described control module controls, is the most alternately incident to described light path reflector element, by
Described light path reflector element reflexes to described scanning element, after described scanning element reflects, by described poly-
Light microscopic incidence optical fundus；Described scanning element makes the periodically alternate sweep of described at least two difference monochromatic line light beam
Optical fundus；
Described at least two difference monochromatic line light beam, after optical fundus scatters, carries optical fundus information respectively through described poly-
Light microscopic is back to described scanning element, after described scanning element reflects, by the limit of described light path reflector element
Edge region is incident to described image-generating unit, and described control module controls described image-generating unit at different monochromatic linear lights
Eye fundus image is gathered during bundle periodically alternate sweep optical fundus.
Further, described light path reflector element is reflecting mirror, and its reflecting surface is anti-less than described scanning element
Penetrate face.
Further, described scanning element and pupil conjugation.
Further, described light path reflector element and anterior surface of cornea conjugation.
Further, described at least two difference monochromatic line light beam includes red line light beam and green line light beam；
Described monochromatic line light-beam generator include red point source, the first collimating mirror, green point source, the
Two collimating mirrors, the first dichroic mirror, post lens and be provided with the light barrier of strip through-hole；Described red some light
The light beam that source sends, after described first collimating mirror collimation, parallel is incident to described first dichroic mirror, by institute
State the first dichroic mirror and be transmitted through described post lens, through described strip through-hole after described post lens converge,
Form described red line light beam；The light that described green point source sends is incident after described second collimating mirror collimation
To described first dichroic mirror, reflex to described post lens through described first dichroic mirror, by described post lens
Through described strip through-hole after convergence, form described green line light beam.
Further, described at least two difference monochromatic line light beam also includes blue Line beam；Described monochromatic line
Light-beam generator also includes blue dot light source, the 3rd collimating mirror and the second dichroic mirror；Described blue dot light
The light beam that source sends is incident to described second dichroic mirror, through described the after described 3rd collimating mirror collimation
Two dichroic mirrors reflex to described post lens, described post lens, through described strip through-hole after converging, formed
Described blue Line beam.
Further, described control module is alternately controlled described at least two difference monochromatic line light beam and exists by the cycle
During same period interscan optical fundus, the time on each monochromatic line light beam scanning optical fundus is equal.
Further, described image-generating unit is linear array imaging unit.
Further, described linear array imaging unit is linear array CCD camera or linear array CMOS camera.
Further, described scanning element is galvanometer.
The Advantageous Effects of the present invention: it is different that control module built-in in this imaging device controls at least two
Monochromatic line light beam by cycle alternate sweep optical fundus, due to the tissue at the same position of the human eye list to different colours
The absorbability of colo(u)r streak light beam is different, and it is same to human eye at different monochromatic line light beams that control module controls image-generating unit
One position carries out fundus imaging and gathers corresponding eye fundus image, and corresponding eye fundus image is treated obtains different one-tenth
Gray-scale map, doctor can be by the eye of the patient in reflective color differentiation disease region to some according to this one-tenth gray-scale map
The end, checks.
Accompanying drawing explanation
Fig. 1 is the embodiment of the light channel structure schematic diagram of the present invention；
Fig. 2 is the index path of the first embodiment of monochromatic line light-beam generator 12 in Fig. 1；
Fig. 3 is the index path of the second embodiment of monochromatic line light-beam generator 12 in Fig. 1；
Fig. 4 is red line light beam and green line light beam the showing by cycle alternate sweep optical fundus of control module control
It is intended to；
Fig. 5 is that red line light beam, green line light beam and blue Line beam that control module controls were replaced by the cycle
The schematic diagram on scanning optical fundus；
Fig. 6 is the optical fundus figure that red line light beam scanning optical fundus obtains；
Fig. 7 is the optical fundus figure that green line light beam scanning optical fundus obtains；
Fig. 8 is the optical fundus figure that blue Line beam scanning optical fundus obtains；
In figure, the title of each sequence number and correspondence is respectively as follows:
11, control module；
12, monochromatic line light-beam generator；
121, red point source；
122, green point source；
123, blue dot light source；
124, the first dichroic mirror；
125, the second dichroic mirror；
126, post lens；
127, light barrier；
1271, strip through-hole；
128, the first collimating mirror；
128a, the second collimating mirror；
128b, the 3rd collimating mirror
13, light path reflector element；
14, scanning element；
15, condenser lens；
16, image-generating unit；
E, eyes；
Ec, anterior surface of cornea；
Ep, through hole
Er, optical fundus；
Detailed description of the invention
In order to make the technical problem to be solved, technical scheme and beneficial effect clearer,
Below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that this place is retouched
The specific embodiment stated only in order to explain the present invention, is not intended to limit the present invention.
With reference to Fig. 1, the many multi-color cords scanning fundus imaging equipment described in the present invention includes: control module 11, list
Colo(u)r streak light-beam generator 12, light path reflector element 13, scanning element 14, condenser lens 15 and image-generating unit
16.Wherein, the reflective surface area of light path reflector element 13, less than the reflective surface area of scanning element 14, so sets
The purpose of meter is: owing to the beam diameter of the monochromatic line light beam of monochromatic line light-beam generator 12 generation compares
Little, when being incident to light path reflector element 13, the diameter of monochromatic line light beam is smaller；The monochrome of minor diameter
Line beam is scanned through unit 14 and reflexes to condenser lens 15, is finally incident to the optical fundus Er of human eye.Minor diameter
Monochromatic line light beam there is diffuse-reflectance at optical fundus Er, optical fundus Er scattering the diameter of monochromatic line light beam returned
Increase much than the diameter of the monochromatic line light beam being incident on the Er of optical fundus.Therefore, when being returned by optical fundus scattering
Monochromatic line light beam be incident to scanning element 14 through condenser lens 15, scanning element 14 is reflexed to light path
During reflector element 13, owing to the reflective surface area of light path reflector element 13 is more much smaller than scanning element 14, so
The monochromatic line light beam being reflexed to light path reflector element 13 by scanning element 14 only has very small part anti-by light path
Penetrate unit 13 to block, remaining major part by marginal incident of light path reflector element 13 to image-generating unit 16,
And imaging on image-generating unit 16.Therefore, the reflective surface area of light path reflector element 13 is designed to than scanning
The reflective surface area of unit 13 is little to be advantageous in that, it is possible to increase through the profit of the monochromatic line light beam that optical fundus Er returns
By rate.It is said that in general, this utilization rate generally reaches more than 80%, say, that reflected by scanning element 14
Through optical fundus Er scattering return monochromatic line light beam only have about 20% can be blocked by light path reflector element 13,
Remaining monochromatic line light beam of about 80% all can be by the marginal incident of light path reflector element 13 to image-generating unit
16.If light path reflector element 13 replaces with dichroic mirror (not shown), then dichroic mirror both can by by
The monochromatic line light beam that monochromatic line light-beam generator 12 generates reflexes to scanning element 14, it is also possible to will be by eye
End Er scatters return, by condenser lens 15, and the list carrying optical fundus information of scanned unit 14 reflection
Colo(u)r streak light beam is transmitted through image-generating unit 16.When light path reflector element 13 replaces with dichroic mirror, then it is not required to
The glazed area of dichroic mirror is made more much smaller than the area of scanning element 14.But, dichroic mirror
Light transmittance is smaller, and the most only about 50%, so can cause and be carried eye by what Er scattering in optical fundus returned
The waste of the monochromatic line light beam of end information.Therefore, the light path reflector element 13 in this equipment need not replace with two
To color mirror.
Please continue to refer to Fig. 1, it will be recalled that monochromatic line light-beam generator 12 can generate different monochromatic lines
Light beam, in order to obtain the colorful eye fundus image that opening and closing become, the most at least needs to obtain red line light beam scanning eye
Eye fundus image and green line light beam that the end obtains scan the eye fundus image that optical fundus obtains, then by red line light beam
The eye fundus image that the scanning eye fundus image that obtains of optical fundus and green line light beam scanning optical fundus obtain synthesizes colorful eye
Base map picture.Therefore, monochromatic line light-beam generator 12 at least needs to generate red line light beam and green linear light
Bundle.Also has another situation, the eye that colorful eye fundus image can also be obtained by red line light beam scanning optical fundus
The eye that base map picture, the green line light beam scanning eye fundus image that obtains of optical fundus and blue Line beam scanning optical fundus obtain
The synthesis of base map picture obtains.Now, monochromatic line light-beam generator 12 needs to generate red line light beam, green
Line beam and blue Line beam.
With reference to Fig. 1, Fig. 4 and Fig. 5, when monochromatic line light-beam generator 12 generates red line light beam and green
During Line beam, control module 11 controls the scanning eye that red line light beam and green line light beam are alternateed by the cycle
End Er.With reference to Fig. 1 and Fig. 4, in 0-0.5T (T represents the scan period), red line light beam is incident to
Light path reflector element 13, red line light beam reflexes to scanning element 14 through light path reflector element 13, passes through
Scanning element 14 reflexes to condenser lens 15, and red line light beam shines after the cornea Ec and pupil Ep of human eye E
Penetrate optical fundus Er；Under the effect of scanning element 14, red line light beam scanning optical fundus Er, optical fundus scattering return
Red line light beam carry optical fundus information, successively through pupil Ep, it is single that cornea Ec, condenser lens 15 return to scanning
Unit 14, the most scanned unit 14 reflects, owing to the reflective surface area of light path reflector element 13 compares scanning element
The reflective surface area of 14 is little, so the red line light beam of scanned unit 14 reflection is by light path reflector element 13 limit
Edge is directly entered image-generating unit 16, and control module 11 controls image-generating unit 16 and collects eye as shown in Figure 6
Base map.In 0.5T-1T, green line light beam is incident to light path reflector element 13, and green line light beam is through light
Road reflector element 13 reflexes to scanning element 14, is scanned through unit 14 and reflexes to condenser lens 15, green line
Light beam, through the cornea Ec of human eye E, irradiates optical fundus Er after pupil Ep；Under the effect of scanning element 14, green
Line beam scanning optical fundus Er, optical fundus scattering the green line light beam returned carries optical fundus information, successively through pupil
Ep, cornea Ec and condenser lens 15 return to scanning element 14, and the most scanned unit 14 reflects, and carries eye
The green line light beam of end information is directly entered image-generating unit 16, control module by light path reflector element 13 edge
11 control image-generating unit 16 collects optical fundus figure as shown in Figure 7.In 1T-3/2T, red line light beam
Again scan optical fundus, process through equipment and obtain another optical fundus figure as shown in Figure 6；In 3/2T-2T,
Green line light beam scans optical fundus again, obtains another optical fundus figure as shown in Figure 7.Like this, mould is controlled
Block 11 controls the scanning optical fundus Er that red line light beam and green line light beam are alternateed by the cycle, and controls into
As unit 16 interleaved acquisition obtains different optical fundus figure as shown in Figure 6 and Figure 7.It should be noted that
In one cycle T, red line light beam is identical with the time of green line light beam scanning human eye, is 0.5T.
There is different optical fundus figure as shown in Figure 6 and Figure 7, it is possible to the way synthesized by image is then
Optical fundus figure as shown in Figure 6 and optical fundus figure as shown with 7 are synthesized colorful eye fundus image (not shown),
This synthetic method is not introduced in present patent application.
When select two kinds of Line beams time, red line light beam and green line light beam are optimized scheme, this be because of
Penetration capacity for HONGGUANG is the strongest, and human ocular tissues is the strongest to its absorbability.It is true that can also select
Other two different colors of monochromatic light, such as: HONGGUANG, blue light；Or blue light, purple light；Gold-tinted, green glow
And other two different colors of monochromatic combinations.
It addition, a kind of method synthesizing colorful eye fundus image, it is simply that by red line light beam, green linear light
The different optical fundus figure that bundle and blue Line beam scanning optical fundus obtain synthesizes, thus obtains colorful eye fundus image.
This synthetic method is introduced the most in the present patent application.Now, monochromatic line light-beam generator 12 needs
Generate red line light beam, green line light beam and blue Line beam, then control module 11 control red line light beam,
Green line light beam and blue Line beam, obtain by alternately pressing intermittent scanning optical fundus according to order as shown in Figure 5
The optical fundus figure that the red line light beam scanning optical fundus figure (see Fig. 6) on optical fundus, green line light beam scanning optical fundus obtain
(Fig. 7) the optical fundus figure (Fig. 8) obtained with blue Line beam scanning optical fundus, the blue linear light shown in Fig. 8
The optical fundus figure that bundle scanning optical fundus obtains is so to generate, raw with reference to Fig. 1: monochromatic line light-beam generator 12
Au bleu Line beam is incident to light path reflector element 13, and blue Line beam reflects through light path reflector element 13
To scanning element 14, being scanned through unit 14 and reflex to condenser lens 15, blue Line beam is through the angle of human eye E
Film front surface Ec, irradiates optical fundus Er after pupil Ep；Under the effect of scanning element 14, blue Line beam scanning
Optical fundus Er, optical fundus scattering the blue Line beam returned carries optical fundus information, successively through pupil Ep, table before cornea
Face Ec, condenser lens 15 return to scanning element 14, and the most scanned unit 14 reflects, and reflection light beam is by light
Road reflector element 13 edge is directly entered image-generating unit 16, and control module 11 controls image-generating unit 16 and gathers
To the optical fundus figure obtained by blue Line beam scanning optical fundus as shown in Figure 8.
When monochromatic line light-beam generator 12 generates red line light beam, green line light beam and blue Line beam,
Control module 11 is to control red line light beam, green line light beam and blue Line beam by the way of shown in Fig. 5
The scanning optical fundus E's alternateed by the cycle.Specifically, in 0-1/3T, red line light beam scanning eye
The end, obtain optical fundus figure as shown in Figure 6；In 1/3-2/3T, green line light beam scanning optical fundus, obtain as
Optical fundus figure shown in 7；At 2/3-1T, blue Line beam scanning optical fundus, obtain optical fundus figure as shown in Figure 8.
In next cycle T, control module 11 still controls red line light beam, green line light beam and blue linear light
Bundle presses said sequence scanning optical fundus, respectively obtains different optical fundus figures, is then synthesized by different optical fundus figures
Colorful optical fundus figure.It should be noted that in a scan period T, red line light beam, green line light beam
Identical with the time on blue Line beam scanning optical fundus, it is 1/3T.
As can be seen from Figures 7 and 8, by the green line light beam scanning optical fundus figure that obtains of optical fundus with by blue line
The optical fundus figure difference that light beam scanning optical fundus obtains is little, and this just explanation, human ocular tissues is to green line light beam and indigo plant
The absorbability of colo(u)r streak light beam is similar.The optical fundus figure that red line light beam scanning optical fundus shown in Fig. 6 obtains is then
Differ greatly with the optical fundus figure shown in Fig. 7 and Fig. 8, human ocular tissues's absorbability to red line light beam is described
The strongest.So, when the colorful eye fundus image needing opening and closing to become, optimized scheme uses red line exactly
Light beam and green line light beam scanning optical fundus, then synthesize the eye fundus image respectively obtained.Monochromatic linear light
It is prior art that the optical fundus figure that bundle scanning optical fundus obtains synthesizes colorful optical fundus figure, and present patent application will not be launched
Specifically describe.
In addition, it is necessary to explanation be, although control module 11 in a cycle T according to shown in Fig. 4
Red line light beam, green line light beam scanning sequency scanning optical fundus, or according to the red line light beam described in Fig. 5,
Green line light beam and the sequential scan optical fundus of blue Line beam, but this is the most exemplary.It is true that
Control module 11 can also be according to green line light beam, the sequential scan eye of red line light beam in a cycle T
The end；Or according to red line light beam, blue Line beam and other permutation and combination sequential scan of green line light beam
Optical fundus, it will be understood that when monochromatic line light beam is red line light beam, blue Line beam and green line light beam,
Knowledge according to permutation and combination is it is recognised that three kinds of monochromatic light have 6 kinds of permutation and combination methods.
Refer to Fig. 2 and Fig. 3, red line light beam, green line light beam and blue Line beam mentioned above,
Generated by the monochromatic line light-beam generator 12 in Fig. 1 and obtain.Monochromatic line light-beam generator 12 is a kind of
Point source becomes the Optical devices of Line beam, and its internal light channel structure is varied.When monochromatic line light beam
When generating means 12 generates red line light beam and green line light beam, the light path of monochromatic line light-beam generator 12
Structure is as shown in Figure 2；When monochromatic line light-beam generator 12 generates red line light beam, green line light beam and indigo plant
During colo(u)r streak light beam, its light channel structure is as shown in Figure 3.With reference to Fig. 2, monochromatic line light-beam generator 12 includes:
Red point source the 121, first collimating mirror 128, green point source the 122, second collimating mirror 128a, the one or two
To color mirror 124, post lens 126 and the light barrier 127 with strip through-hole 1271.Said before is red
Colo(u)r streak light beam obtains in the following way: the red beam that red point source 121 sends is through the first collimation
After mirror 128 collimation, parallel it is incident to the first dichroic mirror 124, is transmitted through through the first dichroic mirror 124
Post lens 126, then converge through post lens 126, converging beam passes the strip through-hole 1271 of light barrier 127,
Become red line light beam.Green line light beam mentioned above obtains in the following way: green point source
122 light beams sent, after the second collimating mirror 128a collimation, parallel are incident to the first dichroic mirror 124,
Reflexing to post lens 126 through the first dichroic mirror 124, then converge through post lens 126, converging beam is worn
Cross the strip through-hole 1271 of light barrier 127, become green line light beam.
It should be noted that according to the monochromatic light of other different colours, as used yellow line light beam and blueness
Line beam, then corresponding point source becomes yellow dots light source and blue dot light source.
When monochromatic line light-beam generator 12 generates red line light beam, green line light beam and blue Line beam,
The light channel structure of monochromatic line light-beam generator 12 is as it is shown on figure 3, include: red point source 121, the
One collimating mirror 128, green point source the 122, second collimating mirror 128a, blue dot light source the 123, the 3rd collimation
Mirror 128b, first dichroic mirror the 124, second dichroic mirror 125, post lens 126 and with bar shaped lead to
The light barrier 127 in hole 1271.Now, red line light beam obtains in the following way: red point source
121 light beams sent are after the first collimating mirror 128 collimation, successively through the first dichroic mirror 124 transmission and the
Two dichroic mirror 125 transmissions, the most parallel are incident to post lens 126, after post lens 126 converge, converge
Convergent pencil of rays, through the strip through-hole 1271 of light barrier 127, becomes red line light beam；Green line light beam then passes through
Following manner obtains: the light that green point source 122 sends after the second collimating mirror 128a collimation, parallel enter
It is incident upon the first dichroic mirror 124, the first dichroic mirror 124 reflexes to the second dichroic mirror 125, through second
Dichroic mirror 125 is transmitted through post lens 126, and after being converged by post lens 126, converging beam is through being in the light
The strip through-hole 1271 of plate 127, becomes green line light beam；Blue Line beam is to obtain in the following way:
The light beam that blue dot light source 123 sends, after the 3rd collimating mirror 128b collimation, is incident to the second dichroic mirror
125, reflex to post lens 126 through the second dichroic mirror 125, converge through post lens 126, converging beam is worn
Blue Line beam is become after crossing the strip through-hole 1271 on light barrier 127.It should be noted that red some light
Source 121, the position of green point source 122 and blue dot light source 123 can exchange, and this has no effect on three kinds
The generation respectively of monochromatic line light beam.
Owing to red line light beam, green line light beam and blue Line beam are the red point sources in Fig. 2 and Fig. 3
121, green point source 122 and blue dot light source 123 are by monochromatic line light-beam generator in Fig. 2 and Fig. 3
The respective optical element of 12 obtains after processing, and therefore, control module 11 controls red line light beam, green line
Light beam and blue Line beam alternate sweep optical fundus, its essence is to control red point source 121, green point source
122 and blue dot light source 123 alternation.Specifically, control module 11 can be certain implanting computer
The program of kind.
It should be noted that in FIG, need cornea Ec and light path reflector element 13 are arranged to conjugation
Relation, this is because: after condenser lens 15 transmission, be incident to the monochromatic light of cornea Ec, except major part from
Cornea Ec is transmitted through pupil Ep, after being then incident to optical fundus Er, carries optical fundus information and returns, after through pupil
Hole Ep, cornea Ec, condenser lens 15, scanning element 14, the edge of light path reflector element 13, finally become
As unit 16 receives and imaging, this part monochromatic line light beam is this equipment needs；Also have sub-fraction monochromatic
Line beam incides cornea Ec, reflects to form reflection light on cornea Ec, and this reflection light will not pass through
Pupil Ep is incident to optical fundus Er, and this reflection just this equipment is unwanted, it is impossible to allow it enter image-generating unit 16.
This reflection light, through condenser lens 15, incides scanning element 14, and scanned unit 14 reflexes to light path reflection
Unit 13, owing to light path reflector element 13 and cornea Ec are conjugate relations, so light path reflector element 13
Just reflection light can be sheltered from so that reflection light will not be incident to image-generating unit 16.
Also, it should be noted in FIG, scanning element 14 and pupil Ep are also required to be arranged to conjugation and close
System.This is because, when the various monochromatic line parallel beams reflected through light path reflector element 13 are incident to scanning list
Unit 14, owing to scanning element 14 is around being perpendicular to rotary shaft o of drawing, (o is that rotary shaft is perpendicular to paper
On intersection point), therefore incide in scanning element 14 monochromatic line light beam scanned unit 14 reflection after,
Condenser lens 15 it is incident in fan shape, owing to scanning element 14 and pupil Ep are conjugate relation, so through sweeping
Retouch unit 14 and cornea Ec enters into the monochromatic light of pupil Ep and also scans optical fundus Er in fan shape, thus improve
The utilization ratio of monochromatic line light beam.
In this article, due to use monochromatic line light beam (such as, exemplary be chosen as red line light beam,
Blue Line beam and green line light beam), so image-generating unit 16 prioritizing selection in Fig. 1 is linear array imaging list
Unit.
Further, linear array imaging unit 16 is preferably linear array CCD camera or linear array CMOS camera.
In this article, scanning element 14 is preferably galvanometer.
The technique effect of the present invention: control module controls different monochromatic line light beams and presses cycle alternate sweep optical fundus,
Owing to the tissue at the same position of human eye is different to the absorbability of different monochromatic line light beams, control module control
Be formed as unit when different monochromatic line light beams scanning optical fundus to fundus imaging, obtain different eye fundus image (as
Shown in Fig. 6-Fig. 8), then different eye fundus images is synthesized a colorful eye fundus image (not shown).
Different eye fundus image (one-tenth gray-scale map) shown in Fig. 6-Fig. 8 is conducive to some can be distinguished by reflective color
The examination of ocular fundus of the patient in disease region.Further, since the light beam that this device uses is monochromatic line light beam,
Therefore the eye fundus image obtained has higher imaging resolution and image contrast, and image quality is higher.By
Higher in the image quality of different eye fundus images, the quality of the eye fundus image of its synthesis is the highest.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Any amendment, equivalent and the improvement etc. made within bright spirit and principle, should be included in the present invention
Protection domain within.
Claims (10)
1. the scanning of multi-color cord more than kind fundus imaging equipment, it is characterised in that including: control module, monochromatic line
Light-beam generator, light path reflector element, scanning element, condenser lens and image-generating unit；
Described monochromatic line light-beam generator generates at least two difference monochromatic line light beam；The two difference list
Colo(u)r streak light beam, under described control module controls, is the most alternately incident to described light path reflector element, by
Described light path reflector element reflexes to described scanning element, after described scanning element reflects, by described poly-
Light microscopic incidence optical fundus；Described scanning element makes the periodically alternate sweep of described at least two difference monochromatic line light beam
Optical fundus；
Described at least two difference monochromatic line light beam, after optical fundus scatters, carries optical fundus information respectively through described poly-
Light microscopic is back to described scanning element, after described scanning element reflects, by the limit of described light path reflector element
Edge region is incident to described image-generating unit, and described control module controls described image-generating unit at different monochromatic linear lights
Eye fundus image is gathered during bundle periodically alternate sweep optical fundus.
Many multi-color cords the most as claimed in claim 1 scanning fundus imaging equipment, it is characterised in that described light path
Reflector element is reflecting mirror, and its reflecting surface is less than the reflecting surface of described scanning element.
Many multi-color cords the most as claimed in claim 1 or 2 scanning fundus imaging equipment, it is characterised in that described
Scanning element and pupil conjugation.
Many multi-color cords the most as claimed in claim 1 or 2 scanning fundus imaging equipment, it is characterised in that: described
Light path reflector element and anterior surface of cornea conjugation.
Many multi-color cords the most as claimed in claim 1 or 2 scanning fundus imaging equipment, it is characterised in that described
At least two difference monochromatic line light beam includes red line light beam and green line light beam；
Described monochromatic line light-beam generator include red point source, the first collimating mirror, green point source, the
Two collimating mirrors, the first dichroic mirror, post lens and be provided with the light barrier of strip through-hole；Described red some light
The light beam that source sends, after described first collimating mirror collimation, parallel is incident to described first dichroic mirror, by institute
State the first dichroic mirror and be transmitted through described post lens, through described strip through-hole after described post lens converge,
Form described red line light beam；The light that described green point source sends is incident after described second collimating mirror collimation
To described first dichroic mirror, reflex to described post lens through described first dichroic mirror, by described post lens
Through described strip through-hole after convergence, form described green line light beam.
Many multi-color cords the most as claimed in claim 5 scanning fundus imaging equipment, it is characterised in that described at least
Two kinds of different monochromatic line light beams also include blue Line beam；Described monochromatic line light-beam generator also includes blueness
Point source, the 3rd collimating mirror and the second dichroic mirror；The light beam that described blue dot light source sends is through described
It is incident to described second dichroic mirror after three collimating mirror collimations, reflexes to described post through described second dichroic mirror
Lens, described post lens, through described strip through-hole after converging, form described blue Line beam.
Many multi-color cords the most as claimed in claim 1 or 2 scanning fundus imaging equipment, it is characterised in that described
Control module is alternately controlled described at least two difference monochromatic line light beam on same period interscan optical fundus by the cycle
Time, the time on each monochromatic line light beam scanning optical fundus is equal.
Many multi-color cords the most as claimed in claim 1 or 2 scanning fundus imaging equipment, it is characterised in that described
Image-generating unit is linear array imaging unit.
Many multi-color cords the most as claimed in claim 8 scanning fundus imaging equipment, it is characterised in that described linear array
Image-generating unit is linear array CCD camera or linear array CMOS camera.
Many multi-color cords the most as claimed in claim 1 or 2 scanning fundus imaging equipment, it is characterised in that described
Scanning element is galvanometer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610288433.0A CN105996978A (en) | 2016-05-04 | 2016-05-04 | Multi-color light scanning eye ground imaging device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610288433.0A CN105996978A (en) | 2016-05-04 | 2016-05-04 | Multi-color light scanning eye ground imaging device |
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| CN201610288433.0A Pending CN105996978A (en) | 2016-05-04 | 2016-05-04 | Multi-color light scanning eye ground imaging device |
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Application publication date: 20161012 |