CN104382554A - Laser scanning ophthalmoscope with staring function - Google Patents
Laser scanning ophthalmoscope with staring function Download PDFInfo
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- CN104382554A CN104382554A CN201410623944.4A CN201410623944A CN104382554A CN 104382554 A CN104382554 A CN 104382554A CN 201410623944 A CN201410623944 A CN 201410623944A CN 104382554 A CN104382554 A CN 104382554A
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Abstract
The invention provides a laser scanning ophthalmoscope with a staring function. The laser scanning ophthalmoscope is characterized by sequentially consisting of a first lens group, a second lens group, a beam splitter, a third lens and a staring screen which share one optical axis from the human eyes to the staring screen, wherein the beam splitter forms a 45-degree angle with the optical axis, the first lens group and the second lens group are confocal, the third lens is positioned on the focal plane of the second lens group, the staring screen is positioned on the focal plane of the third lens, the first lens group, the second lens group, the beam splitter and the third lens form an achromatic system, and the first lens group, the second lens group and the third lens respectively have the positive focal power. The laser scanning ophthalmoscope has the characteristics that the structure is simple and compact, the imaging quality is good, in addition, the staring function is realized, the heteronomous rotation of the eyeballs can be effectively reduced, and the fundus imaging quality is ensured.
Description
Technical field
The present invention relates to ophthalmoscope, particularly a kind of scanning laser ophthalmoscope watched attentively, is be applied in the ophthalmoscope in the confocal imaging system of optical fundus.
Background technology
For optical fundus confocal imaging system, in order to obtain the two dimensional image of eye ground, near-infrared laser is needed to carry out two-dimensional scan to optical fundus, the conventional two-dimensional scan method of one class uses Galvo galvanometer (a kind of rotational axis vertical and the very near one group of reflecting mirror of distance) directly to realize two-dimensional scan, this system needs scanning laser ophthalmoscope that the scanning pupil being positioned at Galvo galvanometer inside is carried out pupil transmission, pupil after transmitting can be overlapped with the pupil of human eye, and now infrared beam will converge to optical fundus.
In prior art, a kind of scanning laser ophthalmoscope be made up of two pieces or three pieces of aspheric surface simple lens groups is described in the European patent of patent No. EP1308124A2, when infrared light scanning optical fundus, this ophthalmoscope is watched attentively owing to not having visible ray target, eyeball can involuntary rotation, and the rotation of this eyeball can affect the image quality of optical fundus scanogram.
Summary of the invention
The present invention proposes a kind of scanning laser ophthalmoscope watched attentively for optical fundus confocal imaging system, this ophthalmoscope has the advantages that structure is simple, compact, image quality is excellent, and have and watch function attentively, can effectively reduce independently not rotating of eyeball, ensure fundus imaging quality.
Technical solution of the present invention is as follows:
A kind of scanning laser ophthalmoscope watched attentively, feature is that its formation is from human eye to watching the first battery of lens that screen is common optical axis successively attentively, second battery of lens, light splitting piece, 3rd lens and watch screen attentively, described light splitting piece and described optical axis at 45 °, the first described battery of lens and the second battery of lens confocal, 3rd lens are positioned on the focal plane of the second described battery of lens, described screen of watching attentively is positioned on the focal plane of the 3rd described lens, the first described battery of lens, second battery of lens, light splitting piece and the 3rd lens form achromatic system, the first described battery of lens, second battery of lens and the 3rd lens all have positive light coke.
Described light splitting piece is to visible ray high permeability, and the work surface near human eye side is to infrared light high reflectance.
Described watches the LED (light emitting diode) or OLED (Organic Light Emitting Diode) screen that screen is an active display pattern attentively.
The present invention compared with prior art, has the following advantages and good effect:
Scanning laser ophthalmoscope of the present invention, by the imaging of visible ray fixation object to eye ground, carrying out the effective rotation reducing eyeball in the scanning process of optical fundus, can ensure the quality of optical fundus scanogram.
Scanning laser ophthalmoscope of the present invention is centered optical system, simple and compact for structure, processes and debugs conveniently.
Accompanying drawing explanation
Fig. 1 is the scanning laser ophthalmoscope light path schematic diagram that the present invention can watch attentively.
Fig. 2 is the visible light wave range transfer curve of the embodiment of the present invention.
Fig. 3 is the visible ray chromatic curve of the embodiment of the present invention.
Fig. 4 is that stigma figure is converged on infrared band optical fundus of the invention process.
Detailed description of the invention
For further setting forth the present invention, technological means and effect is adopted by reaching predetermined goal of the invention, below in conjunction with accompanying drawing 1 and preferred embodiment table 1 and table 2, to the detailed description of the invention of the scanning laser ophthalmoscope watched attentively proposed according to the present invention, structure and feature, be described in detail as follows.
First refer to Fig. 1, as seen from the figure, the scanning laser ophthalmoscope that the present invention can watch attentively, forming comprises from human eye 1 to watching the first battery of lens 2 that screen 7 is common optical axis successively attentively, second battery of lens 4, light splitting piece 5, 3rd battery of lens 6 and watch screen 7 attentively, described light splitting piece 5 is at 45 ° with described optical axis, the first described battery of lens 2 and the second battery of lens 3 confocal 3, 3rd battery of lens 6 is positioned on the focal plane of the second described battery of lens 4, described screen 7 of watching attentively is positioned on the focal plane of the 3rd described battery of lens 6, the first described battery of lens 2, second battery of lens 4, light splitting piece 5 and the 3rd battery of lens 6 form visual achromatism system, the first described battery of lens 2, second battery of lens 4 and the 3rd battery of lens 6 all have positive light coke.
In the present embodiment, the first battery of lens 2 is made up of meniscus lens 2a and convex lens 2b, is cemented doublet group, has positive light coke; Second battery of lens 4 is made up of meniscus lens 4a and convex lens 4b, is cemented doublet group, has positive focal power; The back focal plane of the first battery of lens and the front focal plane of the second battery of lens overlap, in the first battery of lens is relative with the meniscus of the meniscus lens of the second battery of lens.Light splitting piece has high permeability to visible ray, has high reflectance near the surface of human eye side to infrared light.3rd lens are plano-convex singlet lens, and plane, towards watching screen attentively, is positioned at the back focal plane of the second battery of lens.Watching screen attentively is LED (light emitting diode) or OLED (Organic Light Emitting Diode) screen that initiatively can show image, is positioned at the focal plane of the 3rd lens.
In the present embodiment, the complex model based on the physiological structure of human eye is adopted to Oph infrared light path part, reduced eye model is adopted to visible light part light path.
Fig. 2 is the transfer curve of visible ray in the embodiment of the present invention.General visual system transfer function 40 lines right/millimeter place needs to reach 0.2, and the transfer function mtf value of all visual fields of the present embodiment tool 40 lines right/millimeter place is all greater than 0.5, has higher resolution.
Fig. 3 is the chromatic curve of embodiment of the present invention scanning ophthalmoscope at visible light wave range, and to 0.485 μm and 0.656 μm of light achromatism, remaining color difference is less than 5 μm at visible light wave range, and ophthalmoscope has corrected visible ray aberration preferably.According to the parameter in above figure, the present embodiment has well corrected aberration to visible light wave range, can observe visible ray fixation object more clearly by ophthalmoscope, reaches good and watches effect attentively.
Fig. 4 is the stigma figure of embodiment of the present invention mid-infrared light when converging at optical fundus, infrared light spot spot diameter under all visual fields is all less than 13 μm, and be all less than Aili spot except peripheral field with stigma, meet optical fundus confocal imaging system reaches micron dimension requirement to scanning lateral resolution.
The structure of the eyeglass of specific embodiment is as shown in the table:
Table 1
Illustrate: infrared two-dimensional scan light beam, after light splitting piece reflection, enters human eye by the first battery of lens and the second battery of lens, converges at optical fundus
Table 2
Illustrate: watch screen attentively and send visible ray successively by imaging in optical fundus after the 3rd battery of lens, beam-splitter, the first and second battery of lens, upper table is by reverse optical path design
Experiment shows, the scanning laser ophthalmoscope that the present invention can watch attentively, has the advantages that structure is simple, compact, image quality is excellent, and has and watch function attentively, can effectively reduce independently not rotating of eyeball, can ensure fundus imaging quality.
Claims (3)
1. the scanning laser ophthalmoscope that can watch attentively, be characterised in that its formation comprises from human eye to watching the first battery of lens that screen is common optical axis successively attentively, second battery of lens, light splitting piece, 3rd lens and watch screen attentively, described light splitting piece and described optical axis at 45 °, the first described battery of lens and the second battery of lens confocal, 3rd lens are positioned on the focal plane of the second described battery of lens, described screen of watching attentively is positioned on the focal plane of the 3rd described battery of lens, the first described battery of lens, second battery of lens, light splitting piece and the 3rd lens form visual achromatism system, the first described battery of lens, second battery of lens and the 3rd lens all have positive light coke.
2. scanning laser ophthalmoscope according to claim 1, is characterized in that, described light splitting piece is thoroughly high to visible ray, and the surface near human eye side is high anti-to infrared light.
3. scanning laser ophthalmoscope according to claim 1 and 2, is characterized in that, described watches the light emitting diode or Organic Light Emitting Diode screen that screen is an active display pattern attentively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410623944.4A CN104382554A (en) | 2014-11-07 | 2014-11-07 | Laser scanning ophthalmoscope with staring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410623944.4A CN104382554A (en) | 2014-11-07 | 2014-11-07 | Laser scanning ophthalmoscope with staring function |
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| Publication Number | Publication Date |
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| CN104382554A true CN104382554A (en) | 2015-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410623944.4A Pending CN104382554A (en) | 2014-11-07 | 2014-11-07 | Laser scanning ophthalmoscope with staring function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106510614A (en) * | 2016-12-14 | 2017-03-22 | 广州优里卡光电科技有限公司 | Eye fundus image checking system with flexible color screen |
Citations (8)
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|---|---|---|---|---|
| US5943117A (en) * | 1996-11-22 | 1999-08-24 | Jozef F. Van de Velde | Scanning laser ophthalmoscope for retinal microphotocoagulation and measurement of wavefront aberrations |
| US5949520A (en) * | 1996-04-09 | 1999-09-07 | Odyssey Optical Systems, Llc | Wide field of view scanning laser ophthalmoscope |
| US20030103191A1 (en) * | 2001-11-06 | 2003-06-05 | Ocular Instruments, Inc. | Wide angle lens for use with a scanning laser ophthalmoscope |
| CN101791212A (en) * | 2009-12-31 | 2010-08-04 | 中国科学院长春光学精密机械与物理研究所 | Universal liquid crystal adaptive aberration correcting retina imaging system |
| CN103222851A (en) * | 2012-01-26 | 2013-07-31 | 佳能株式会社 | Ophthalmic apparatus, ophthalmic apparatus control method and storage medium |
| CN103356161A (en) * | 2012-03-30 | 2013-10-23 | 佳能株式会社 | Optical coherence tomography imaging apparatus and method for controlling the same |
| CN103458774A (en) * | 2011-03-31 | 2013-12-18 | 佳能株式会社 | Medical system |
| CN103654720A (en) * | 2012-08-30 | 2014-03-26 | 佳能株式会社 | Optical coherence tomography image shooting apparatus and system, interactive control apparatus and method |
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2014
- 2014-11-07 CN CN201410623944.4A patent/CN104382554A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5949520A (en) * | 1996-04-09 | 1999-09-07 | Odyssey Optical Systems, Llc | Wide field of view scanning laser ophthalmoscope |
| US5943117A (en) * | 1996-11-22 | 1999-08-24 | Jozef F. Van de Velde | Scanning laser ophthalmoscope for retinal microphotocoagulation and measurement of wavefront aberrations |
| US20030103191A1 (en) * | 2001-11-06 | 2003-06-05 | Ocular Instruments, Inc. | Wide angle lens for use with a scanning laser ophthalmoscope |
| CN101791212A (en) * | 2009-12-31 | 2010-08-04 | 中国科学院长春光学精密机械与物理研究所 | Universal liquid crystal adaptive aberration correcting retina imaging system |
| CN103458774A (en) * | 2011-03-31 | 2013-12-18 | 佳能株式会社 | Medical system |
| CN103222851A (en) * | 2012-01-26 | 2013-07-31 | 佳能株式会社 | Ophthalmic apparatus, ophthalmic apparatus control method and storage medium |
| CN103356161A (en) * | 2012-03-30 | 2013-10-23 | 佳能株式会社 | Optical coherence tomography imaging apparatus and method for controlling the same |
| CN103654720A (en) * | 2012-08-30 | 2014-03-26 | 佳能株式会社 | Optical coherence tomography image shooting apparatus and system, interactive control apparatus and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106510614A (en) * | 2016-12-14 | 2017-03-22 | 广州优里卡光电科技有限公司 | Eye fundus image checking system with flexible color screen |
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Application publication date: 20150304 |