CN110448265A - A kind of inclined eyeground system of birefringece crystal snap Muller matrix imaging survey - Google Patents
A kind of inclined eyeground system of birefringece crystal snap Muller matrix imaging survey Download PDFInfo
- Publication number
- CN110448265A CN110448265A CN201810432671.3A CN201810432671A CN110448265A CN 110448265 A CN110448265 A CN 110448265A CN 201810432671 A CN201810432671 A CN 201810432671A CN 110448265 A CN110448265 A CN 110448265A
- Authority
- CN
- China
- Prior art keywords
- savart
- plate
- modified
- lens
- light
- 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.)
- Granted
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
- A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/14—Arrangements specially adapted for eye photography
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 present invention relates to medical image acquisition technique fields, inclined eyeground system is surveyed in specially a kind of birefringece crystal snap Muller matrix imaging, including light source, first Polarization Modulation module, second Polarization Modulation module, image acquiring device, first collimation lens, first imaging lens, second collimation lens, second imaging lens, object lens, reflecting mirror containing hole, the first Polarization Modulation module includes two pieces of modified savart polariscopes I, the polarizer and the first half way up the mountain piece, the second Polarization Modulation module includes two pieces of modified savart polariscopes II, analyzer and the first half way up the mountain piece, the each piece of modified savart polariscope includes two blocks of savart plates, second or third half way up the mountain piece.The present invention obtains the speed of target image faster, can effectively solve the problems such as image is fuzzy because of caused by Rotation of eyeball, facilitates the early symptom that doctor has found the eye diseases such as glaucoma, cataract early.
Description
Technical field
The present invention relates to medical image acquisition technique field, specially a kind of birefringece crystal snap Muller matrix at
As surveying inclined eyeground system.
Background technique
Surveying inclined technology to have a big disadvantage due to the imaging of polarization grating snap Muller matrix is exactly that once can only at most obtain mesh
4 Muller matrix images for marking the object a certain moment, can not disposably obtain 16 Muller matrixes at target object a certain moment
Image, and when complete information that obtain an object is most, needs to obtain 16 Muller matrix images of the object, therefore root
Survey inclined technical principle according to the imaging of polarization grating snap Muller matrix come when scanning eye, always because Rotation of eyeball so as to cause
The problems such as image obscures causes doctor that can not find the eye diseases such as glaucoma, the cataract of early stage according to captured image,
Lead to not timely diagnosing and treating, delays optimal treatment period.
Summary of the invention
For above-mentioned problem, inclined eyeground system is surveyed in a kind of birefringece crystal snap Muller matrix imaging of the present invention, mainly
By the way that 4 blocks of birefringece crystals, that is, modified savart polariscope is arranged, 1 bunch polarised light is first cut into 4 bunch polarised lights, this 4
Bunch polarised light forms interference fringe through Polaroid mirror and is located on the eyeglass of the reflecting mirror containing hole, reflects through reflecting mirror containing hole
Afterwards, 4 bunch polarised lights illuminate the retina of eyes through object lens, and then the retina of eyes passes through object lens shape before reflecting mirror containing hole
At an intermediary image, the relevant information of retina is contained in the intermediary image, while 4 beams are formed by modulated linearly polarized light
Interference fringe the Muller matrix of eye retina is modulated by two kinds of carrier frequency, then 4 beam is by modulated linearly polarized light
It is modified type savart polariscope again after collimated lens refraction and cuts into 8 bunch polarised lights, which is finally sheared
At 16 bunch polarised lights, this 16 bunch polarised light after analyzer, the imaging of the second imaging lens, schemed by final interference fringe image
As acquisition device obtains.The present invention obtains target image speed faster, can effectively solve the image mould because of caused by Rotation of eyeball
The problems such as paste.
The technical solution adopted by the present invention is that:
The inclined eyeground system of a kind of birefringece crystal snap Muller matrix imaging survey, it is characterised in that: including light source (1) and to the left
The reflecting mirror containing hole (22) of 45 ° of inclination, the light source (1) are located at the underface of the reflecting mirror containing hole (22), the light source (1)
Transmitting light side to be disposed between the reflecting mirror containing hole (22) the first collimation lens (2), circle shelter (20),
First Polarization Modulation module (3), the first imaging lens (4), light source (1) central point, the first collimation lens (2) central point, circle
The center of circle of shape shelter (20), first Polarization Modulation module (3) central point, the first imaging lens (4) central point, reflecting mirror containing hole
(22) center of circle is located along the same line, and first collimation lens (2) is the first collimation lens at a distance from the light source (1)
(2) focal length f, the imaging of the circle shelter (20) cover the circular hole of the reflecting mirror containing hole (22)；
It is provided with object lens (21) on the left of the reflecting mirror containing hole (22), is disposed on the right side of the reflecting mirror containing hole (22)
Second collimation lens (5), the second Polarization Modulation module (6), the second imaging lens (7), image acquiring device (8), described image obtains
Take device (8) at a distance from second imaging lens (7) be the second imaging lens (7) focal length f, object lens (21) central point,
Reflecting mirror containing hole (22) center of circle, the second collimation lens (5) central point, second Polarization Modulation module (6) central point, the second imaging lens
(7) central point, image acquiring device (8) central point are located in same horizontal line.
The first polarization is injected when any Ray Of Light that light source issues forms parallel rays after the refraction of the first collimation lens
Modulation module does not have source light and is emitted directly toward in the circular hole of the reflecting mirror containing hole due to there is blocking for round shelter,
Then the first Polarization Modulation module first will be per a branch of the incident beam modulated at linearly polarized light, then before each bunch polarised light is cut into
4 parallel bunch polarised lights of left and right afterwards, the 4 bunch polarised light form interference fringe after the convergence of the first imaging lens and are located in containing hole
On the eyeglass of reflecting mirror, after the lens reflecting of reflecting mirror containing hole, which illuminates the retina of eyes through object lens, so
The retina of eyes forms an intermediary image by object lens before reflecting mirror containing hole afterwards, which contains the correlation of retina
Information, while 4 beams are formed by interference fringe by two kinds of carrier frequency to modulate eye retina by modulated linearly polarized light
Muller matrix, then 4 beams are projected from the circular hole of the reflecting mirror containing hole by modulated linearly polarized light, are reflected through the second collimation lens
The second Polarization Modulation of directive module afterwards, each bunch polarised light cut into 4 bunch polarised lights by the second Polarization Modulation module, most
Cut into 16 parallel up and down bunch polarised lights altogether eventually, this 16 bunch polarised light modulates rear polarizer direction one through analyzer
Cause, then by the second imaging lens be imaged after, formed the target image with interference fringe be located on image acquiring device.Work people
Member can obtain whole Muller matrix images of eye retina by the interference fringe of corresponding algorithm Demodulation Imaging Analysis.
Further, the first Polarization Modulation module (3) includes that two pieces of modified savarts that are identical and overlapping are inclined
Light microscopic I, respectively the first modified savart polariscope I (11a) and the second modified savart polariscope I (11b), described first changes
Into type savart polariscope I (11a) light-emitting surface and the second modified savart polariscope I (11b) entering light face between be provided with
The entering light face of half of wave plate (12), the first modified savart polariscope I (11a) is additionally provided with the polarizer (10).
The incident light that each beam enters the first Polarization Modulation module is all first polarized device and is modulated into the identical line in polarization direction
Then polarised light is just cut into 4 bunch polarised lights, wherein first being sheared along the vertical direction by the first modified savart polariscope I
At two parallel up and down bunch polarised lights, after the first half way up the mountain piece, each bunch polarised light is again by the second modified savart polarisation
Mirror I cuts into two parallel bunch polarised lights of left and right in the horizontal direction.
Further, the second Polarization Modulation module (6) includes that two pieces of modified savarts that are identical and overlapping are inclined
Light microscopic II, respectively the first modified savart polariscope II (14a) and the second modified savart polariscope II (14b), described
It is set between the light-emitting surface of one modified savart polariscope II (14a) and the entering light face of the second modified savart polariscope II (14b)
It is equipped with the first half way up the mountain piece (12), the light-emitting surface of the second modified savart polariscope II (14b) is additionally provided with analyzer (15).
The linearly polarized light that each beam enters the second Polarization Modulation module all cuts into 4 bunch polarised lights, wherein first by first
Modified savart polariscope II cuts into two parallel up and down bunch polarised lights along the vertical direction, each after the first half way up the mountain piece
Bunch polarised light is cut into two parallel bunch polarised lights of left and right in the horizontal direction by the second modified savart polariscope II again, most
4 bunch polarised lights project after analyzer modulating polarization direction is consistent afterwards,
Further, the modified savart polariscope I includes the first savart plate (16) and the second savart plate of arranged superposed
(17), it is provided with the second half-wave plate (13) between the first savart plate (16) and the second savart plate (17), first savart
Plate (16) and second savart plate (17) thickness are equal, and the first savart plate (16) optical axis and second savart plate (17) optical axis are located at
In same plane, with the second half-wave plate (13) be symmetry axis, in axis distribution and the two angle be 90 °.
First savart plate by the linearly polarized light of every a branch of incidence along the vertical direction or horizontal direction cut into two bunch polarization
Light；Second savart plate projects two bunch polarised light up and down or left and rights after shearing in parallel.
Further, the modified savart polariscope II includes the third savart plate (18) and the 4th savart of arranged superposed
Plate (19) is provided with third half-wave plate (23), the third Sa between the third savart plate (18) and the 4th savart plate (19)
Shoe plate (18) and the 4th savart plate (19) thickness are equal and 2 times for first savart plate (16) thickness, the third savart plate
(18) optical axis and the 4th savart plate (19) optical axis are in the same plane, with third half-wave plate (23) for symmetry axis, in axis point
Cloth and the two angle are 90 °.
Third savart plate by the linearly polarized light of every a branch of incidence along the vertical direction or horizontal direction cut into two bunch polarization
Light；4th savart plate projects two bunch polarised light up and down or left and rights after shearing in parallel.
Further, the polarization direction angle of the first half way up the mountain piece (12) is 22.5 °.
First half way up the mountain piece plays the role of the light field direction of vibration of incident linearly polarized light rotating 45 °.
Further, the polarization direction angle of second half-wave plate (13) is 45 °.
Second half-wave plate has bit phase delay and expands the double action of visual field, and the o light in the first savart plate passes through second
Become e light after half-wave plate, e light becomes o light after the second half-wave plate, then to project in parallel by the second savart plate again
The distance between two lines polarised light is increased to 2 times of single savart plate shearing displacement, and field of view angle first expands 10 ° of left and right again up and down
Expand 10 °, and then having ensured the interference fringe in far field still is equally spaced vertical bar line.
Further, the polarization direction angle of the third half-wave plate (23) is 45 °.
Third half way up the mountain piece has bit phase delay and expands the double action of visual field, and the o light in third savart plate is through third half
Become e light after wave plate, e light becomes o light after third half-wave plate, then makes project in parallel two articles by the 4th savart plate again
The distance between linearly polarized light is increased to 2 times of single savart plate shearing displacement, and field of view angle first expands 10 ° of left and right expansions again up and down
10 °, and then having ensured the interference fringe in far field still is equally spaced vertical bar line.In the present invention, the second half-wave plate (13) and
Three half way up the mountain pieces (23) are identical.
Further, the saturating vibration deflection of the polarizer (10) and analyzer (15) is 45 °.
Parallel input light is modulated into the linearly polarized light that polarization direction is 45 ° after the polarizer；Analyzer is detected from second
Whether the polarization direction for the linearly polarized light that modified savart polariscope II (14b) projects is 45 °.
Further, first collimation lens (2), the first imaging lens (4), the second collimation lens (5), the second imaging lens
(7), object lens (21) are the identical convex lens of focal length.
Light the first collimation lens of directive from different perspectives that light source issues is formed parallel after the refraction of the first collimation lens
Light directive the first Polarization Modulation module；The linearly polarized light projected from the first Polarization Modulation module shape after the convergence of the first imaging lens
It is located on sample at interference fringe；By modulated linearly polarized light, directive second is collimated from different perspectives after sample reflects
Mirror forms parallel the second Polarization Modulation of linearly polarized light directive module after the refraction of the second collimation lens；From the second Polarization Modulation mould
The linearly polarized light that block projects converges in the image planes of image acquiring device through the second imaging lens, forms the target figure with interference fringe
Picture；The effect of object lens is that eye retina is imaged.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1, inclined eyeground system is surveyed in a kind of birefringece crystal snap Muller matrix imaging of the present invention, solemn with current polarization grating snap
It strangles the inclined technology of matrix imaging survey to compare, having can get more high-transmission rate, more High Extinction Ratio, broader optical electivity, obtains mesh
Logo image speed faster the advantages that.
2, inclined eyeground system is surveyed in a kind of birefringece crystal snap Muller matrix imaging of the present invention, has merged derivometer and photograph
The function of machine can obtain the intensity image and Muller matrix image of target object simultaneously, can obtain eyes by once photo taking
16 Muller matrix images of retina, since the Muller matrix image of eye retina carries a large amount of spies of eye retina
Reference ceases, therefore the shape of human eye's retina can be clear from by the analysis to 16 Muller images of eye retina
The information such as shadow, institutional framework, because of the problems such as image caused by Rotation of eyeball is fuzzy before efficiently solving, facilitate doctor and
When accurately find the eye diseases such as glaucoma, the cataract of early stage.
Detailed description of the invention
In order to illustrate more clearly of example or technical solution in the prior art of the invention, below will to embodiment or
Required attached drawing, which is done, in description of the prior art simply introduces, it is clear that the accompanying drawings in the following description is only of the invention one
A little examples under the premise of not paying creativeness, can also obtain according to these attached drawings to those skilled in the art
Obtain other attached drawings.
Inclined eyeground system construction drawing is surveyed in a kind of birefringece crystal snap Muller matrix imaging of Fig. 1；
Inclined eyeground System Working Principle figure is surveyed in a kind of birefringece crystal snap Muller matrix imaging of Fig. 2；
Fig. 3 the first Polarization Modulation function structure chart；
Fig. 4 the second Polarization Modulation function structure chart；
Fig. 5 linearly polarized light injects the working principle diagram of the first modified savart polariscope I；
Fig. 6 linearly polarized light injects the working principle diagram of the second modified savart polariscope I through the second half-wave plate；
The modulated 4 bunch polarised light of Fig. 7 is cut into the schematic diagram of 8 bunch polarised lights by the first modified savart polariscope II；
Tetra- bunch polarised light of Fig. 8 reflects front elevation through reflecting mirror containing hole；
The front elevation that 16 bunch polarised light of Fig. 9 is projected from analyzer；
Figure 10 the first half-wave plate perspective view；
Figure 11 polarizer perspective view；
Figure 12 analyzer perspective view；
In attached drawing, 1- light source, the first collimation lens of 2-, the first Polarization Modulation of 3- module, the first imaging lens of 4-, 5- second are collimated
Mirror, the second Polarization Modulation of 6- module, the second imaging lens of 7-, 8- image acquiring device, 9- eyes, the 10- polarizer, 11a- first change
Into type savart polariscope I, 11b- the second modified savart polariscope I, the first half-wave plate of 12-, the second half-wave plate of 13-, 14a-
One modified savart polariscope II, 14b- the second modified savart polariscope II, 15- analyzer, the first savart of 16- plate, 17-
Two savart plates, 18- third savart plate, the 4th savart plate of 19-, 20- circle shelter, 21- object lens, 22- reflecting mirror containing hole, 23-
Third half-wave plate.
Specific embodiment
Below in conjunction with the attached drawing in present example, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
Embodiment:
As shown in Figure 1, inclined eyeground system is surveyed in a kind of imaging of birefringece crystal snap Muller matrix, including light source 1 and roll to the left
Oblique 45 ° of reflecting mirror containing hole 22, the light source 1 are located at the underface of the reflecting mirror containing hole 22, and the light source 1 emits light one
Side is to being disposed with the first collimation lens 2, round shelter 20, the first Polarization Modulation module between the reflecting mirror containing hole 22
3, the first imaging lens 4,1 central point of light source, 2 central point of the first collimation lens, the center of circle of round shelter 20, the first polarization
3 central point of modulation module, 4 central point of the first imaging lens, 22 center of circle of reflecting mirror containing hole are located along the same line, first collimation
Lens 2 are the focal length f of the first collimation lens 2 at a distance from the light source 1, and the imaging of the circle shelter 20 covers described contain
The circular hole of hole reflecting mirror 22；
The left side of the reflecting mirror containing hole 22 is provided with object lens 21, and the right side of the reflecting mirror containing hole 22 is disposed with the second standard
Straight lens 5, the second Polarization Modulation module 6, the second imaging lens 7, image acquiring device 8, described image acquisition device 8 and described the
The distance of two imaging lens 7 is the focal length f of the second imaging lens 7,21 central point of object lens, 22 center of circle of reflecting mirror containing hole, the second standard
5 central point of straight lens, 6 central point of the second Polarization Modulation module, 7 central point of the second imaging lens, 8 center point of image acquiring device
In in same horizontal line；First collimation lens 2, the first imaging lens 4, the second collimation lens 5, the second imaging lens 7, object lens 21
It is the identical convex lens of focal length；
As shown in figure 3, the first Polarization Modulation module 3 includes two pieces of modified savart polariscopes I that are identical and overlapping,
I 11b of I 11a of respectively the first modified savart polariscope and the second modified savart polariscope, the first modified savart are inclined
It is provided with the first half-wave plate 12 between the entering light face of I 11b of the light-emitting surface of I 11a of light microscopic and the second modified savart polariscope, it is described
The entering light face of first modified savart polariscope, I 11a is additionally provided with the polarizer 10.
As shown in figure 4, the second Polarization Modulation module 6 includes two blocks of modified savart polarisations that are identical and overlapping
Mirror II, II 14b of II 14a of respectively the first modified savart polariscope and the second modified savart polariscope, described first improves
The first half are provided between the entering light face of II 14b of light-emitting surface and the second modified savart polariscope of II 14a of type savart polariscope
The light-emitting surface of slope piece 12, II 14b of the second modified savart polariscope is additionally provided with analyzer 15.
As shown in figure 3, the modified savart polariscope I includes the first savart plate 16 and the second savart plate of arranged superposed
17, the second half-wave plate 13, the first savart plate 16 and are provided between the first savart plate 16 and the second savart plate 17
Two savart plates, 17 thickness is equal, and 16 optical axis of the first savart plate and 17 optical axis of the second savart plate are in the same plane, with
Two half-wave plates 13 be symmetry axis, in axis distribution and the two angle be 90 °.
As shown in figure 4, the modified savart polariscope II includes the third savart plate 18 and the 4th savart of arranged superposed
Plate 19 is provided with third half-wave plate 23,18 He of third savart plate between the third savart plate 18 and the 4th savart plate 19
4th savart plate, 19 thickness is equal and is 2 times of 16 thickness of the first savart plate, 18 optical axis of third savart plate and the 4th savart
19 optical axis of plate is in the same plane, and is symmetry axis with third half-wave plate 23, in axis distribution and the two angle be 90 °.
As shown in Figure 10, the polarization direction angle of the first half way up the mountain piece 12 is 22.5 °, as shown in Figure 5 and Figure 6, described the
The polarization direction angle of two half-wave plates 13 is 45 °, and the polarization direction angle of third half-wave plate 23 as shown in Figure 7 is 45 °, such as Figure 11 and figure
Shown in 12, the saturating vibration deflection of the polarizer 10 and analyzer 15 is 45 °.
What the polarizer of the invention and analyzer used is polarizing film, and savart plate is negative uniaxial crystal plate, the light source
For monochromatic source, as shown in Fig. 5, Fig. 6, Fig. 7, the first savart plate optical axis and third savart plate optical axis are in XZ plane, with X-axis
Forward direction, Z axis forward direction are at 45 °, and the second savart plate optical axis and the 4th savart plate optical axis are negative with X-axis forward direction, Z axis in XZ plane
To at 45 °, the second half-wave plate optical axis and third half way up the mountain piece optical axis are positive with X-axis in X/Y plane, Y-axis forward direction is at 45 °, such as scheme
Shown in 10, the first half-wave plate optical axis is 22.5 ° with the angle of Y-axis forward direction in X/Y plane, and as shown in figure 11, polarizer optical axis exists
At 45 ° with X-axis forward direction, Y-axis forward direction in X/Y plane, as shown in figure 12, analyzer optical axis is in X/Y plane, with X-axis forward direction, Y-axis
It is positive at 45 °.
The course of work of the invention: as shown in Fig. 2, eyes are located at the position that reflecting mirror containing hole is imaged by object lens, light source
Any Ray Of Light d issued forms parallel rays d ' after the refraction of the first collimation lens and injects the first Polarization Modulation module, by
It is 45 ° in the polarizer deflection that shakes thoroughly, therefore it is 45 ° of linear polarization that parallel incoming rays d ' becomes polarization direction after the polarizer
Light, as shown in figure 5, since the first savart plate optical axis is in XZ plane, it is at 45 ° with X-axis forward direction, Z axis forward direction, therefore the bunch is inclined
Vibration light is that X-direction is divided into o light and e light, o light by the first savart plate of the first modified savart polariscope I along vertical direction
Become e light through the second half-wave plate, e light becomes o light through the second half-wave plate, since the second savart plate optical axis is in XZ plane, with X-axis
Forward direction, Z axis negative sense are at 45 °, therefore e light, o light form about two linearly polarized lights projected in parallel i.e. by the second savart plate
D2, d1, linearly polarized light d2 are increased to 2 times of single savart plate shearing displacement at a distance from d1, and field of view angle expands 10 ° up and down, such as
Shown in Figure 10, since the first half-wave plate optical axis is 22.5 ° with the angle of Y-axis forward direction in X/Y plane, pass through the first half-wave
After piece, the light field direction of vibration of linearly polarized light d2 and d1 are rotated 45 °, and then linearly polarized light d2 and d1 injects the second modified Sa
Watt polariscope I, as shown in fig. 6, linearly polarized light d2 and d1 are respectively again by the first savart plate edge of the second modified savart polariscope I
Horizontal direction, that is, Z-direction cuts into two bunch polarised lights, forms 4 bunch polarised lights altogether, this 4 bunch polarised light is improved through second
Formed after second half way up the mountain piece of type savart polariscope I, the second savart plate 4 beams up and down, two parallel linearly polarized light project,
That is linearly polarized light d2 cuts into linearly polarized light d6 and d5, linearly polarized light d1 cuts into linearly polarized light d4 and d3, similarly, linearly polarized light
The distance of d6 and d5, the distance of linearly polarized light d4 and d3 are increased to 2 times of single savart plate shearing displacement, and field of view angle or so expands
10°；
It is reflected as shown in figure 8, linearly polarized light d3, d4, d5, d6 form interference fringe and are located in after the convergence of the first imaging lens containing hole
On the eyeglass of mirror, this 4 bunch polarised light shines into eyes by object lens after the refraction of the eyeglass of the reflecting mirror containing hole, due to there is round screening
Block material blocks, therefore does not have source light and be emitted directly toward in the circular hole of the reflecting mirror containing hole, that is, round shelter is maximum
The back reflection for eliminating object lens of limit is so that reflecting mirror containing hole provides ring illumination light source for eye pupil, next
After this 4 bunch polarised light illuminates the retina of eyes, the retina of eyes forms one by object lens before reflecting mirror containing hole
Intermediary image, which contains the relevant information of retina, while 4 beams are formed by interference item by modulated linearly polarized light
Line modulates the Muller matrix of eye retina by two kinds of carrier frequency, and then 4 beam is anti-from hole is contained by modulated linearly polarized light
Penetrate in the circular hole of mirror and project, formed after the refraction of the second collimation lens the linearly polarized light d3 ' that 4 beams project in parallel, d4 ', d5 ',
D6 ', after this 4 bunch polarised light injects the second Polarization Modulation module, similarly, the line that each beam enters the second Polarization Modulation module is inclined
Vibration light is all that X-direction cuts into two bunch polarised lights by the first modified savart polariscope II along the vertical direction, such as Fig. 7 institute
Show, 4 linearly polarized lights cut into 8 bunch polarised lights altogether, i.e. linearly polarized light d3 ' cut into the linearly polarized light d7 projected in parallel up and down and
D8, linearly polarized light d4 ' cut into the linearly polarized light d11 and d12 projected in parallel up and down, and linearly polarized light d5 ' cuts into parallel up and down
The linearly polarized light d9 and d10 of injection, linearly polarized light d6 ' cut into the linearly polarized light d13 and d14 projected in parallel up and down, similarly, often
About one group parallel the distance between two bunch polarised lights are increased to 2 times of single savart plate shearing displacement, above and below field of view angle
Expand 10 °；
Then this 8 bunch polarised light is after the first half-wave plate, after the light field direction of vibration of each bunch polarised light is rotated 45 ° again
The second modified savart polariscope II is injected, then each bunch polarised light is again by the second modified savart polariscope II along level
Direction, that is, Z-direction cuts into two bunch polarised lights, and 8 bunch polarised lights are cut into 16 bunch polarised lights altogether, this 16 bunch is inclined
Vibration light is modulated into the identical linearly polarized light in polarization direction by analyzer again after the injection of the second modified savart polariscope II, such as schemes
Shown in 8, linearly polarized light d7 cuts into d15 and d16, linearly polarized light d8 cuts into d17 and d18, linearly polarized light d9 cuts into d19 and
D20, linearly polarized light d10 cut into d21 and d22, linearly polarized light d11 cuts into d23 and d24, linearly polarized light d12 cuts into d25
D27 and d28 is cut into d26, linearly polarized light d13, linearly polarized light d14 cuts into d29 and d30, this last 16 bunch polarised light
Interference fringe is formed after assembling by the second imaging lens and is located in the image planes of image acquiring device, is formed with interference fringe
Target image, staff can obtain 16 Muller matrix figures of eye retina by corresponding algorithm demodulated interferential striped
Picture.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in the use of the new type
Spirit and principle within, any modification, equivalent replacement, improvement and so on should be included within the protection scope of invention.
Claims (10)
1. inclined eyeground system is surveyed in a kind of birefringece crystal snap Muller matrix imaging, it is characterised in that: including light source (1) and to the left
Oblique 45 ° of reflecting mirror containing hole (22) is rolled, the light source (1) is located at the underface of the reflecting mirror containing hole (22), the light source
(1) transmitting light side to be disposed between the reflecting mirror containing hole (22) the first collimation lens (2), circle shelter
(20), the first Polarization Modulation module (3), the first imaging lens (4), light source (1) central point, the first collimation lens (2) center
It is point, the center of circle of round shelter (20), first Polarization Modulation module (3) central point, the first imaging lens (4) central point, anti-containing hole
It penetrates mirror (22) center of circle to be located along the same line, first collimation lens (2) is saturating for the first collimation at a distance from the light source (1)
The focal length f of mirror (2), the imaging of the circle shelter (20) cover the circular hole of the reflecting mirror containing hole (22)；
It is provided with object lens (21) on the left of the reflecting mirror containing hole (22), is disposed on the right side of the reflecting mirror containing hole (22)
Second collimation lens (5), the second Polarization Modulation module (6), the second imaging lens (7), image acquiring device (8), described image obtains
Take device (8) at a distance from second imaging lens (7) be the second imaging lens (7) focal length f, object lens (21) central point,
Reflecting mirror containing hole (22) center of circle, the second collimation lens (5) central point, second Polarization Modulation module (6) central point, the second imaging lens
(7) central point, image acquiring device (8) central point are located in same horizontal line.
2. inclined eyeground system is surveyed in a kind of birefringece crystal snap Muller matrix imaging according to claim 1, feature exists
In: the first Polarization Modulation module (3) includes two pieces of modified savart polariscopes I that are identical and overlapping, and respectively
One modified savart polariscope I (11a) and the second modified savart polariscope I (11b), the first modified savart polariscope
The first half-wave plate (12), institute are provided between the light-emitting surface of I (11a) and the entering light face of the second modified savart polariscope I (11b)
The entering light face for stating the first modified savart polariscope I (11a) is additionally provided with the polarizer (10).
3. inclined eyeground system is surveyed in a kind of birefringece crystal snap Muller matrix imaging according to claim 1, feature exists
In: the second Polarization Modulation module (6) includes two pieces of modified savart polariscopes II that are identical and overlapping, and respectively
One modified savart polariscope II (14a) and the second modified savart polariscope II (14b), the first modified savart polarisation
The first half way up the mountain piece is provided between the light-emitting surface of mirror II (14a) and the entering light face of the second modified savart polariscope II (14b)
(12), the light-emitting surface of the second modified savart polariscope II (14b) is additionally provided with analyzer (15).
4. inclined eyeground system is surveyed in a kind of birefringece crystal snap Muller matrix imaging according to claim 2, feature exists
In: first savart plate (16) and second savart plate (17) of the modified savart polariscope I including arranged superposed, described first
It is provided with the second half-wave plate (13) between savart plate (16) and the second savart plate (17), the first savart plate (16) and the second Sa
Shoe plate (17) thickness is equal, and the first savart plate (16) optical axis and second savart plate (17) optical axis are in the same plane, with
Second half-wave plate (13) be symmetry axis, in axis distribution and the two angle be 90 °.
5. inclined eyeground system is surveyed in a kind of birefringece crystal snap Muller matrix imaging according to claim 3, feature exists
In third savart plate (18) and the 4th savart plate (19) that: the modified savart polariscope II includes arranged superposed, described the
It is provided with third half-wave plate (23) between three savart plates (18) and the 4th savart plate (19), the third savart plate (18) and the 4th
Savart plate (19) thickness is equal and is 2 times of first savart plate (16) thickness, third savart plate (18) optical axis and the 4th Sa
Shoe plate (19) optical axis is in the same plane, with third half-wave plate (23) be symmetry axis, in axis distribution and the two angle be
90°。
6. inclined eyeground system, feature are surveyed in a kind of birefringece crystal snap Muller matrix imaging according to claim 2 or 3
Be: the polarization direction angle of the first half way up the mountain piece (12) is 22.5 °.
7. inclined eyeground system is surveyed in a kind of birefringece crystal snap Muller matrix imaging according to claim 4, feature exists
In: the polarization direction angle of second half-wave plate (13) is 45 °.
8. inclined eyeground system is surveyed in a kind of birefringece crystal snap Muller matrix imaging according to claim 5, feature exists
In: the polarization direction angle of the third half-wave plate (23) is 45 °.
9. inclined eyeground system, feature are surveyed in a kind of birefringece crystal snap Muller matrix imaging according to claim 2 or 3
Be: the saturating vibration deflection of the polarizer (10) and analyzer (15) is 45 °.
10. inclined eyeground system is surveyed in a kind of birefringece crystal snap Muller matrix imaging according to claim 1, feature exists
In: first collimation lens (2), the first imaging lens (4), the second collimation lens (5), the second imaging lens (7), object lens (21) are equal
For the identical convex lens of focal length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810432671.3A CN110448265B (en) | 2018-05-08 | 2018-05-08 | Birefringent crystal snap Mueller matrix imaging polarization fundus system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810432671.3A CN110448265B (en) | 2018-05-08 | 2018-05-08 | Birefringent crystal snap Mueller matrix imaging polarization fundus system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110448265A true CN110448265A (en) | 2019-11-15 |
| CN110448265B CN110448265B (en) | 2021-07-27 |
Family
ID=68480472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810432671.3A Active CN110448265B (en) | 2018-05-08 | 2018-05-08 | Birefringent crystal snap Mueller matrix imaging polarization fundus system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110448265B (en) |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1608578A (en) * | 2003-10-24 | 2005-04-27 | 佳能株式会社 | Funduscopic image processing unit and method |
| CN1658022A (en) * | 2004-01-27 | 2005-08-24 | 株式会社液晶先端技术开发中心 | Light application apparatus, crystallization apparatus and optical modulation element assembly |
| WO2005122875A1 (en) * | 2004-06-15 | 2005-12-29 | Universidad De Murcia | Device and method for measuring scattering in optical systems |
| CN101319873A (en) * | 2008-07-16 | 2008-12-10 | 中国科学院上海光学精密机械研究所 | Space phase shifter for synchronous phase-shifting interferometer |
| WO2009097430A1 (en) * | 2008-02-01 | 2009-08-06 | Lonky Martin L | Methods and techniques to measure, map and correlate ocular micro-tremor (omt) signals |
| US20090247862A1 (en) * | 2008-03-24 | 2009-10-01 | Carl Zeiss Meditec, Inc. | Imaging of polarization scrambling tissue |
| CN102483604A (en) * | 2009-06-23 | 2012-05-30 | 视瑞尔技术公司 | Three-dimensional light modulation arrangement for modulating a wave field having complex information |
| CN102688016A (en) * | 2012-03-07 | 2012-09-26 | 北京理工大学 | Novel mydriasis-free portable fundus camera |
| CN103211574A (en) * | 2012-01-20 | 2013-07-24 | 佳能株式会社 | Image processing apparatus and image processing method |
| CN103300816A (en) * | 2013-05-30 | 2013-09-18 | 中国科学院长春光学精密机械与物理研究所 | Annular lighting device for eye ground camera |
| CN103598872A (en) * | 2013-11-28 | 2014-02-26 | 温州雷蒙光电科技有限公司 | Fundus camera |
| US20140078298A1 (en) * | 2010-09-03 | 2014-03-20 | Michael W. Kudenov | Snapshot spatial heterodyne imaging polarimetry |
| CN103852168A (en) * | 2012-12-04 | 2014-06-11 | 日立视听媒体股份有限公司 | Polarization-sensitive optical measurement instrument |
| CN104586350A (en) * | 2013-10-31 | 2015-05-06 | 尼德克株式会社 | Ophthalmic photographic device, ophthalmic photographic system and ophthalmic photographic method |
| CN104793343A (en) * | 2015-04-13 | 2015-07-22 | 西安电子科技大学 | Three-channel and single-Wollaston prism polarization imaging device and polarization information detecting method |
| CN106197670A (en) * | 2015-05-28 | 2016-12-07 | 广西师范学院 | A kind of double mode full polarization imaging surveys folk prescription method |
| CN107356337A (en) * | 2017-07-13 | 2017-11-17 | 西安交通大学 | Compact miniature fast illuminated channel modulation full polarization imaging detection device and detection method |
| CN107847127A (en) * | 2015-08-27 | 2018-03-27 | 诺华股份有限公司 | The epiretinal membrane removal that optical coherent chromatographic imaging instructs |
| CN207168484U (en) * | 2017-01-12 | 2018-04-03 | 天津工业大学 | Binocular fundus camera imaging optical system |
-
2018
- 2018-05-08 CN CN201810432671.3A patent/CN110448265B/en active Active
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1608578A (en) * | 2003-10-24 | 2005-04-27 | 佳能株式会社 | Funduscopic image processing unit and method |
| CN1658022A (en) * | 2004-01-27 | 2005-08-24 | 株式会社液晶先端技术开发中心 | Light application apparatus, crystallization apparatus and optical modulation element assembly |
| WO2005122875A1 (en) * | 2004-06-15 | 2005-12-29 | Universidad De Murcia | Device and method for measuring scattering in optical systems |
| WO2009097430A1 (en) * | 2008-02-01 | 2009-08-06 | Lonky Martin L | Methods and techniques to measure, map and correlate ocular micro-tremor (omt) signals |
| US20090247862A1 (en) * | 2008-03-24 | 2009-10-01 | Carl Zeiss Meditec, Inc. | Imaging of polarization scrambling tissue |
| CN101319873A (en) * | 2008-07-16 | 2008-12-10 | 中国科学院上海光学精密机械研究所 | Space phase shifter for synchronous phase-shifting interferometer |
| CN102483604A (en) * | 2009-06-23 | 2012-05-30 | 视瑞尔技术公司 | Three-dimensional light modulation arrangement for modulating a wave field having complex information |
| US9442015B2 (en) * | 2010-09-03 | 2016-09-13 | The Arizona Board Of Regents On Behalf Of The University Of Arizona | Snapshot spatial heterodyne imaging polarimetry |
| US20140078298A1 (en) * | 2010-09-03 | 2014-03-20 | Michael W. Kudenov | Snapshot spatial heterodyne imaging polarimetry |
| CN103211574A (en) * | 2012-01-20 | 2013-07-24 | 佳能株式会社 | Image processing apparatus and image processing method |
| CN102688016A (en) * | 2012-03-07 | 2012-09-26 | 北京理工大学 | Novel mydriasis-free portable fundus camera |
| CN103852168A (en) * | 2012-12-04 | 2014-06-11 | 日立视听媒体股份有限公司 | Polarization-sensitive optical measurement instrument |
| CN103300816A (en) * | 2013-05-30 | 2013-09-18 | 中国科学院长春光学精密机械与物理研究所 | Annular lighting device for eye ground camera |
| CN104586350A (en) * | 2013-10-31 | 2015-05-06 | 尼德克株式会社 | Ophthalmic photographic device, ophthalmic photographic system and ophthalmic photographic method |
| CN103598872A (en) * | 2013-11-28 | 2014-02-26 | 温州雷蒙光电科技有限公司 | Fundus camera |
| CN104793343A (en) * | 2015-04-13 | 2015-07-22 | 西安电子科技大学 | Three-channel and single-Wollaston prism polarization imaging device and polarization information detecting method |
| CN106197670A (en) * | 2015-05-28 | 2016-12-07 | 广西师范学院 | A kind of double mode full polarization imaging surveys folk prescription method |
| CN107847127A (en) * | 2015-08-27 | 2018-03-27 | 诺华股份有限公司 | The epiretinal membrane removal that optical coherent chromatographic imaging instructs |
| CN207168484U (en) * | 2017-01-12 | 2018-04-03 | 天津工业大学 | Binocular fundus camera imaging optical system |
| CN107356337A (en) * | 2017-07-13 | 2017-11-17 | 西安交通大学 | Compact miniature fast illuminated channel modulation full polarization imaging detection device and detection method |
Non-Patent Citations (3)
| Title |
|---|
| QIZHI CAO，CHUNMIN ZHANG，EDWARD DEHOOG: "Snapshot imaging polarimeter using modified", 《APPLIED OPTICS》 * |
| 张晶，任文艺，曹奇志，李建映，邓婷: "一种减少空间调制快拍成像测偏仪伪信息的方法", 《物理学报》 * |
| 曹奇志，张晶，EDWARD DEHOOG 等: "空间调制稳态微型快拍成像测偏技术研究", 《物理学报》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110448265B (en) | 2021-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110146989A (en) | Optical waveguide components and its display methods, display device and its display methods | |
| US6339445B1 (en) | Apparatus for deflecting light, device for scanning light, device for reading information and device for stereoscopic display | |
| DE68916398T2 (en) | Illumination system for a liquid crystal display device. | |
| CN107613842B (en) | Lighting device and measuring device | |
| CN104570382B (en) | The device and method of optical image super-resolution are shifted using integral | |
| DE69410117T2 (en) | DEVICE FOR IMAGING AN IMAGE | |
| KR0179043B1 (en) | Phase type spatial light modulator and optical information processor employing the same | |
| CN102037399A (en) | Liquid crystal display device | |
| CN108226170A (en) | Material internal defect detecting system based on Michelson speckle-shearing interferometry | |
| KR100393883B1 (en) | Liquid crystal structure with improved black state, and projector using same | |
| CN107991835B (en) | Optical projection system and method are expanded based on micro-nano structure palarization multiplexing short focus | |
| EP3599506B1 (en) | Lamp unit, vehicular lamp system | |
| CN110376739A (en) | A kind of hologram plane mixing near-eye display system quickly calculated based on the big emergent pupil of light polarization direction | |
| CN101523195B (en) | An apparatus and a method for observing the surface of a sample | |
| US3879133A (en) | Method and apparatus for comparing two objects having similar shapes and dimensions | |
| CN110448265A (en) | A kind of inclined eyeground system of birefringece crystal snap Muller matrix imaging survey | |
| CN105940340A (en) | Electro-optical phase modulation system | |
| CN100480837C (en) | Projection display device | |
| JP2844768B2 (en) | Liquid crystal display | |
| US20240231086A9 (en) | Aerial image projector and movable body | |
| CN109991756A (en) | A kind of wide viewing angle optical shutter of Range-gated Imager | |
| US20230148045A1 (en) | Aerial image projector and movable body | |
| CN110455412A (en) | A kind of inclined system of birefringece crystal snap Muller matrix imaging survey | |
| DE2021324A1 (en) | Photometer for observation devices, especially for microscopes | |
| CN110455409A (en) | A kind of inclined system of ultraphotic spectrum Muller matrix imaging survey |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |