CN1139361C - Measuring arm of optical coherent tomographic eye examining instrument used together with slit lamp - Google Patents
Measuring arm of optical coherent tomographic eye examining instrument used together with slit lamp Download PDFInfo
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- CN1139361C CN1139361C CNB011348496A CN01134849A CN1139361C CN 1139361 C CN1139361 C CN 1139361C CN B011348496 A CNB011348496 A CN B011348496A CN 01134849 A CN01134849 A CN 01134849A CN 1139361 C CN1139361 C CN 1139361C
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- fiber collimator
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- 230000003287 optical effect Effects 0.000 title claims abstract description 23
- 230000001427 coherent effect Effects 0.000 title claims abstract description 9
- 239000013307 optical fiber Substances 0.000 claims abstract description 16
- 210000001508 eye Anatomy 0.000 claims description 24
- 210000005252 bulbus oculi Anatomy 0.000 claims description 4
- 210000000695 crystalline len Anatomy 0.000 description 48
- 238000012014 optical coherence tomography Methods 0.000 description 23
- 238000003384 imaging method Methods 0.000 description 12
- 201000010099 disease Diseases 0.000 description 5
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 5
- 238000007689 inspection Methods 0.000 description 4
- 238000002591 computed tomography Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 208000010412 Glaucoma Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 208000030533 eye disease Diseases 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 206010025482 malaise Diseases 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
The present invention relates to a measuring arm of an optical coherent tomographic ophthalmology examining instrument combined with a slit lamp, which comprises a slit lamp system, an optical fiber collimator, a scanning mirror and a bicolor transmitting-reflecting mirror. White light emitted by a white light source penetrates through a slit after passing through a condensing lens and a lens, and forms an image on a human eye through an objective and a reflector, so that the eye is illuminated, and the human eye is observed through a telescope. Infrared light parallel beams emitted by the optical fiber collimator are incident to the lens after the infrared light parallel beams pass through the scanning mirror and are reflected by the bicolor transmitting-reflecting mirror, the parallel beams are focused on the slit by the lens, and penetrate through the slit; the parallel beams form an image on the human eye through the objective and the reflector, and after the infrared light penetrates into the internal part of the eye, back scattering light goes back to the optical fiber collimator along the original light path. The measuring arm designed by the present invention not only has simple structure, but also ensures that the measuring arm has a maximum scanning area under the condition of the same resolution, or has the best resolution under the condition of the same scanning area.
Description
Technical field
The present invention relates to a kind of and gage beam slit lamp optical joint coherent tomographic ophthalmologic examination instrument, belong to the field of medical examination instrument.
Background technology
The importance of ophthalmic diseases inspection is on record.The ophthalmology checking Instrument of conventional usefulness is a slit lamp, but slit lamp can only be to the surface imagery on optical fundus, and it is then powerless to go deep into the opacity, optical fundus.The optical coherence tomography imaging technique that develops over past ten years (English Optical Coherence Tomography, be called for short OCT) can be to the inner imaging of opaque medium, and resolution is far above X-ray scanning imaging and ultrasonic scanning imaging, so be used for the inspection of ophthalmic diseases very soon.Because X ray can not be used for ophthalmologic examination because of its injury to eyes, OCT ophthalmologic examination instrument can be compared with ultrasound computed tomography ophthalmologic examination instrument: be better than ultrasound computed tomography from resolution OCT somascope, in addition, the probe of ultrasound computed tomography instrument must be with people's eyeball contact, this not only makes the checked people very uncomfortable, and causes cross infection easily.The OCT somascope is contactless, thereby does not have these shortcomings.
External existing OCT ophthalmologic examination instrument, though very expensive, it is fine to work, but also has following shortcoming: there is not the function of conventional slit lamp, therefore necessary with two instruments; Asians's glaucoma sickness rate is higher than the westerner far away in addition, and external product is not checked the function at angle, eyes room, that is to say to check glaucomatous disease.
Summary of the invention
The objective of the invention is to design a kind of and gage beam slit lamp optical joint coherent tomographic ophthalmologic examination instrument, shortcoming at external product, slit lamp is combined with the OCT technology, make an instrument promptly can carry out conventional ophthalmic diseases inspection, can also check the opacity, depths.Not only easy to use, save cost, and two kinds of functions check that simultaneously having two instruments checks beyond thought advantage respectively.The present invention can be to examination of ocular fundus, also can check angle, eyes room, and the inspection of Asians's ophthalmic diseases is better than external product.
The present invention design and gage beam slit lamp optical joint coherent tomographic ophthalmologic examination instrument, comprise the slit lamp system, this system is by white light source, collecting lens, filter plate, lens, slit, object lens, telescope and reflecting mirror are formed, and this gage beam also comprises optical fiber collimator, scanning galvanometer, double-colored anti-mirror.The white light that white light source sends passes slit behind collecting lens and lens, be imaged on the human eye through object lens and reflecting mirror again, and eyes are illuminated, and by telescope human eye is observed.The infrared light collimated light beam that optical fiber collimator sends behind scanning galvanometer again through double-colored anti-mirroring, incide on the lens, lens accumulate in collimated light beam on the slit, pass slit, be imaged on the human eye through object lens and reflecting mirror again, the back-scattered light that this infrared light gos deep into behind the inside ofeye is back to optical fiber collimator along original optical path.
In the above-mentioned gage beam, can also comprise concavees lens, these concavees lens place between object lens and the eyes, and the light that object lens send becomes diverging light behind concavees lens, be imaged on the optical fundus behind eyeball.
The present invention design and gage beam slit lamp optical joint coherent tomographic ophthalmologic examination instrument, from instrument design, not only simple in structure, but also have following advantage: the imaging of OCT light source is forever on the slit of slit lamp, like this, the light source of slit lamp not only can be used as routine examination, can be used as the indication of OCT scanning place simultaneously.Because the light source of OCT is invisible to the human eye, thereby external pertinent instruments all uses the light emitting diode array to indicate.And OCT scanning galvanometer of the present invention imaging is on the object lens of OCT, and this design has guaranteed that maximum sweep limits is arranged under the equal resolution condition, best resolution is arranged under the perhaps identical sweep limits.
Description of drawings
Fig. 1 is the structural representation of the gage beam that designs of the present invention.
Fig. 2 is an OCT index path of measuring eye-chamber angle with gage beam of the present invention.
Fig. 3 is an OCT index path of measuring the optical fundus with gage beam of the present invention.
Among Fig. 1 to Fig. 3, the 1st, optical fiber collimator, the 2nd, scanning galvanometer, the 3rd, white light source, the 4th, collecting lens, the 5th, filter plate, the 6th, double-colored anti-mirror, the 7th, lens, the 8th, slit, the 9th, object lens, the 10th, telescope, the 11st, reflecting mirror, the 12nd, concavees lens.
The specific embodiment
As shown in Figure 1, the present invention design and gage beam slit lamp optical joint coherent tomographic ophthalmologic examination instrument, comprise the slit lamp system, this system is by white light source 3, collecting lens 4, filter plate 5, lens 7, slit 8, object lens 9, telescope 10 and reflecting mirror 11 are formed, and this gage beam also comprises optical fiber collimator 1, scanning galvanometer 2, double-colored anti-mirror 6.The incandescence that white light source 3 sends passes slit 8 behind collecting lens 4 and lens 7, be imaged on the human eye 13 behind object lens 9 and reflecting mirror 11 again, and eyes are illuminated, and observes by 10 pairs of human eyes of telescope.The infrared light collimated light beam that optical fiber collimator 1 sends reflects through double-colored anti-mirror 6 again behind scanning galvanometer 2, incide on the lens 7, collimated light beam is accumulated on the slit 8 through lens, pass slit, be imaged on the human eye through object lens 9 and reflecting mirror 11 again, the back-scattered light that this infrared light gos deep into behind the inside ofeye is back to optical fiber collimator 1 along original optical path.
As shown in Figure 3, in the above-mentioned gage beam, can also comprise concavees lens 12, these concavees lens place between object lens 9 and the eyes 13, and the light that object lens 9 send becomes diverging light behind concavees lens, be imaged on the optical fundus behind eyeball.
The work process of OCT systematic survey arm of the present invention is as follows: from the infrared light of optical fiber collimator 1 outgoing is collimated light beam, behind scanning galvanometer 2, multiple scanning back and forth, through double-colored anti-mirror 6 reflections, again on the slit 8 of lens 7 imaging at former slit lamp, the directional light imaging is a point, makes it become a line after galvanometer 2 scannings, and this line overlaps with slit 8 forever.The light that sends behind slit 8 is divergent beams, these divergent beams behind object lens 9, reflecting mirror 11 imaging at the Fang Jiaochu of human eye.As shown in Figure 3, if before object lens, add concavees lens 12, get final product imaging on the optical fundus.Because the scan action of galvanometer, at line of tested investigation picture, the scanning of depths is finished by other system of OCT.Be back to optical fiber collimator from the backscattered light of human eye along original optical path.
The system that parts 1-8 forms among Fig. 1 can rotate on optical axis, and respectively at 0 °, 45 °, locates the location for 90 ° and 135 °.Can check the situation of different azimuth oculopathy like this.This function is that former crack lamp system has.
The OCT gage beam is checked angle, eyes room light path as shown in Figure 2, surveys the optical fundus light path as shown in Figure 3, just surveys optical fundus light by eye's lens, the suitable convex lens of crystalline lens, and concavees lens are provided with for better focusing on, and other are as broad as long.
With Fig. 2 is example explanation present embodiment characteristics: from the light of optical fiber collimator outgoing is directional light, and beam diameter is 2.2mm, and beam diameter can improve resolution greatly.This light beam reflects through scanning mirror, and the scanning mirror one-period that whenever shakes obtains a width of cloth figure.Reflected light is on the slit of lens imaging at former slit lamp.Vibration mirror scanning is a fine rule, and this fine rule and slit overlap.Like this, the scanning position of OCT on eyes is exactly the position of slit lamp slit image, and the place of illuminating of slit lamp overlaps with scanning place of OCT, and the scanning position of OCT is indicated by slit lamp, by original sem observation, also can add a CCD and on display screen, observe at former Jing Chu.
By the only divergent beams of slit, scanning galvanometer, lens and object lens have a relation in design, promptly lens with the scanning galvanometer imaging on object lens.Like this in scanning process, the center of divergent beams is the center by object lens always, though direction changes.This design can guarantee by the flare maximum.The size of divergent beams hot spot on object lens is relevant with the resolution of OCT, thereby can obtain best resolution.This design has also guaranteed from the backscattered smooth collection rate of OCT the highest, has improved the signal to noise ratio of instrument.
Claims (2)
1, a kind of gage beam of and slit lamp optical joint coherent tomographic ophthalmologic examination instrument, this gage beam comprises the slit lamp system, this system is by white light source, collecting lens, filter plate, lens, slit, object lens, telescope and reflecting mirror are formed, and it is characterized in that also comprising optical fiber collimator, scanning galvanometer, double-colored anti-mirror; The incandescence that described white light source sends passes slit behind collecting lens and lens, be imaged on the human eye through object lens and reflecting mirror again, and eyes are illuminated, and by telescope human eye is observed; The infrared light collimated light beam that described optical fiber collimator sends behind scanning galvanometer again through double-colored anti-mirroring, incide on the lens, through lens collimated light beam is accumulated on the slit, pass slit, be imaged on the human eye through object lens and reflecting mirror again, the back-scattered light that this infrared light gos deep into behind the inside ofeye is back to optical fiber collimator along original optical path.
2, gage beam as claimed in claim 1 is characterized in that this gage beam also comprises concavees lens, and described concavees lens place between object lens and the eyes, and the light that object lens send becomes diverging light behind concavees lens, be imaged on the optical fundus behind eyeball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011348496A CN1139361C (en) | 2001-11-16 | 2001-11-16 | Measuring arm of optical coherent tomographic eye examining instrument used together with slit lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011348496A CN1139361C (en) | 2001-11-16 | 2001-11-16 | Measuring arm of optical coherent tomographic eye examining instrument used together with slit lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1348738A CN1348738A (en) | 2002-05-15 |
| CN1139361C true CN1139361C (en) | 2004-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB011348496A Expired - Fee Related CN1139361C (en) | 2001-11-16 | 2001-11-16 | Measuring arm of optical coherent tomographic eye examining instrument used together with slit lamp |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007181631A (en) * | 2006-01-10 | 2007-07-19 | Topcon Corp | Fundus observation system |
| US8474977B2 (en) * | 2009-08-21 | 2013-07-02 | Alcon Research, Ltd. | Fixed optical system having an adjustable target |
| CN102379680A (en) * | 2011-08-25 | 2012-03-21 | 苏州新视野光电技术有限公司 | Optical coherence tomographic imaging system |
| CN108567409B (en) * | 2017-03-13 | 2023-11-03 | 温州高视雷蒙光电科技有限公司 | Off-axis reflector retina imaging system |
| CN108272432A (en) * | 2017-07-20 | 2018-07-13 | 中山大学中山眼科中心 | A kind of ophthalmology high speed, high resolution multifunctional optical coherence tomography device based on slit-lamp platform |
| CN109008942A (en) * | 2018-09-15 | 2018-12-18 | 中山大学中山眼科中心 | A kind of full optics of the eye coherence tomography device and imaging method based on slit-lamp platform |
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2001
- 2001-11-16 CN CNB011348496A patent/CN1139361C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1348738A (en) | 2002-05-15 |
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