CN2877560Y - LED light source eye examining mirror - Google Patents
LED light source eye examining mirror Download PDFInfo
- Publication number
- CN2877560Y CN2877560Y CN 200520134161 CN200520134161U CN2877560Y CN 2877560 Y CN2877560 Y CN 2877560Y CN 200520134161 CN200520134161 CN 200520134161 CN 200520134161 U CN200520134161 U CN 200520134161U CN 2877560 Y CN2877560 Y CN 2877560Y
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- Prior art keywords
- light source
- ophthalmoscope
- led
- optical element
- led light
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- 230000003287 optical effect Effects 0.000 claims abstract description 50
- 238000005286 illumination Methods 0.000 claims description 16
- 210000004087 cornea Anatomy 0.000 abstract description 9
- 238000007689 inspection Methods 0.000 abstract description 3
- 210000001747 pupil Anatomy 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 238000007634 remodeling Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 208000017442 Retinal disease Diseases 0.000 description 1
- 206010038923 Retinopathy Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
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- Eye Examination Apparatus (AREA)
Abstract
The utility model discloses a LED luminous source ophthalmoscope for observing patients' eyeground, comprising a luminous source, a light gathering apparatus and a projecting lens apparatus, wherein the luminous source employs a LED as the luminous source, the light gathering apparatus converges light ray of the luminous source into an illuminating optical path. The projecting lens apparatus projects light ray onto patients' eyeground, thereby the illuminated portion of the eyeground is inspected by the observer. The light gathering apparatus at least comprises an optical element with an aspheric-surface optical surface, narrowing down the light ray launches onto the patient's eyeground in one direction with respect to the vertical direction in a finite extent table. Inspecting by the utility model, the checked eyes are bigger and the illuminated extent that an observer checks is brighter to prevent the reflecting light reflected from the inspected cornea from entering into the observer vision for not obstructing the inspection.
Description
Technical field
This utility model relates to the medical optical instrument that a kind of ophthalmologic examination is used.Especially relate to the direct ophthalmoscope of a kind of LED of employing as light source.
Background technology
Direct ophthalmoscope is a kind of unusual and amphiblestroid location that is used to check retinopathy, refracting media etc., and Helmholtz is since invention ophthalmoscope in 1815, and it is the medical optical instrument of ophthalmologic examination indispensability always.
Direct ophthalmoscope adopts electric filament lamp or halogen tungsten lamp as light source always for a long time, and their power consumptions are big, and brightness is low, and physical life is short.The theoretical life-span of general this type of bulb is about 25 hours.Generally can be continuously practical 0.75～1.5 hour when the alkaline battery of employing high power capacity or rechargeable battery.
Along with the development of technology, people begin to attempt using the light source of high-capacity LED as direct ophthalmoscope.For example: the medical indagation light source for instrument of U.S. Patent application US20040252278 can adopt white LED light source to be used for direct ophthalmoscope or streak retinoscope from conceptive the description.
High-capacity LED is as a kind of novel green light source, and service life is more than 20000 hours, and low in energy consumption, efficient is high.Novel large power white light LED colour temperature generally about 3200K or 5500K, all applicable light source as direct ophthalmoscope.
Below in conjunction with accompanying drawing several direct ophthalmoscopes in the prior art are described:
(1), common direct ophthalmoscope in the prior art
Structure as shown in Figure 1, light path sketch map, the illumination light that light source 3 sends through beam condensing unit 4, projectoscope 7, illuminator 8, window 9, projects on the tested eye 13.Peep-hole 12 and compensating glass 10 are positioned at the opposite of window 9 in this device.Observer's eyes 12 can above illuminator 8, be observed tested eye 13 by window 9 by peep-hole 10 and compensating glass 11.
What Fig. 2 described is the viewed eye fundus image of ophthalmoscope that the observer adopts Fig. 1 light path.Filled circles observer 12 observes the visual field of tested eye 12, and the lower limb of dotted line and shade partly is that tested eye optical fundus is illuminated part, and dashed area 15 is illuminated illumination highlights branches in the observer visual field.
As shown in Figure 3, projectoscope becomes the real image of a filament near illuminator.
Oph peep-hole 10 is generally at 3mm, its viewing system light path is fixed on a slightly relatively side of illuminating ray axis, the illumination path axis generally becomes 1 °～5 ° angle with the observation optical path axis, this designing and arranging is reflective except the cornea of field of view one side, as there is not a this design, the ophthalmoscope bulb forms the central authorities that Oph bulb picture (cornea is reflective) may drop on field of view by cornea this " convex mirror ", stops that just the examiner observes the tested eye of patient optical fundus.This intensity of light reflection and position are determined by following parameters in structure:
1. the angle between illumination path and the observation optical path.Although the increase of the angle between illumination path and the observation optical path makes the reflective skew of cornea, but reduced the light energy of illuminator and viewing system intersection 15 simultaneously, based on above reason, the angle of illumination path and observation optical path is under situation about meeting the demands, and is little as much as possible.Therefore, real image that filament becomes 16 upper-lower positions just can make angle just little the closer to the top edge of illuminator;
2. the size of illuminator diaphragm.Diaphragm is big more, and the area of cross section that illumination light drops on cornea is also big more, from corneal reflex return reflective many more.
1. strengthen size, the illuminance of the tested eye illuminated area of seeing by peep-hole 10 15;
2. it is reflective to reduce the cornea that enters the observation eye.
(2), directly use the direct ophthalmoscope of LED as light source
The index path of the direct ophthalmoscope of a common LED as shown in Figure 4, different is with directly having replaced bulb 3 with highlighted LED 17 to compare Fig. 1, other are all constant.
What Fig. 5 described is the viewed eye fundus image of ophthalmoscope that the observer adopts Fig. 4 light path.
Fig. 6 describes is to adopt Fig. 4 light path from the real image position that illuminator and led light source became that window 9 is seen.
Because about the common about 0.2～0.4mm of filament width, the about 1.2mm～3mm of length, the luminous body diameter of high-power highlighted LED inside be generally at 1.2mm～5mm, thus in Fig. 6, the real image position that led light source became than filament as much bigger.Part light drops on the top of illuminator, does not reflex in the tested eye 13, cause light energy losses, and ophthalmoscope inside has increased veiling glare; Can project tested eye 13 though drop on the part light of illuminator below, compare Fig. 1 light path that adopts the filament illumination, the former relatively illumination of the most of light system filament real image position that LED real image 18 sends offsets downward.
Can cause like this:
1. after illumination light entered pupil, the light that drops on tested eye illuminated area 15 tops of seeing by peep-hole increased than filament light sources mode, has reduced the illuminance in zone 15 like this; Angle between illumination path and the observation optical path increases, and causes reducing by the tested eye illuminated area 15 that peep-hole is seen;
2. the relative filament lighting system of illumination light that drops on the pupil top increases, and impinges upon reflective the increasing that causes at cornea, iris place like this.
So,, need choose the less highlighted LED of luminous body as far as possible if reduce above-mentioned phenomenon; Adjust the LED position, promptly among Fig. 4 with it a bit to right translation, LED as much as possible is dropped on the illuminator as 18.
In addition, better way is to deal with problems by structurally improving rice.This improvement of doing of this utility model just.
The utility model content
The purpose of this utility model is: a kind of led light source ophthalmoscope is provided, uses this ophthalmoscope can make when checking, the tested eye illuminated area that the inspection observer sees is bigger, its illuminance is stronger.
The technical solution of the utility model is: a kind of led light source ophthalmoscope, in order to observe patient's optical fundus, it includes light source, beam condensing unit, the projectoscope device, described light source adopts LED as light source, described beam condensing unit converges to the light of light source in the illumination path, described projectoscope device is with the optical fundus of ray cast to the patient, the optical fundus is illuminated the part those who are investigated and is observed, described beam condensing unit includes an optical element that has the aspherics surface at least, within the specific limits, will project patient optical fundus light narrows down with respect to its vertical direction in a certain direction.
Below technique scheme is further explained:
1. within the specific limits, will project patient optical fundus light and narrow down with respect to its vertical direction, and just be meant near illuminator, to be compressed into LED picture approaching or less than filament real image size near circular, square or rectangle etc. in a certain direction.
2. described beam condensing unit also can comprise at least one spherical lens.
3. the optical element of the band non-spherical surface that described beam condensing unit comprises can make illuminating ray change shape.
4. the described light that projects the patient optical fundus can make light narrow down with respect to its vertical direction in a direction in a wide relatively scope at least.
5. an optical element that has the aspherics surface can adopt cylindrical lens, lens pillar, LED lens pillar etc. to have the optical element of cylinder degree in the described beam condensing unit.
6. the Oph light source of described led light source comprises the LED that at least one emits white light, its colour temperature at 3000K between the 6000K.
7. described illumination path and observer observe the angle of the observation optical path at the bottom of the patient's eyes under situation about meeting the demands, and be as much as possible little.
The utility model has the advantages that:
1. led light source ophthalmoscope of the present utility model uses this ophthalmoscope can make when checking, the tested eye illuminated area that the inspection observer sees is bigger, its illuminance is stronger.
2. led light source ophthalmoscope of the present utility model, when using this ophthalmoscope to make to check, not reflective can not the entering the visual field of checking the observer that reflects from tested cornea, thereby can the overslaugh examiner not observe tested eye optical fundus.
3. product structure is simple, and is easily manufactured, is beneficial to popularization.
Description of drawings
The utility model will be further described below in conjunction with drawings and Examples:
Fig. 1 is structure, the light path sketch map of a direct ophthalmoscope in the prior art;
What Fig. 2 described is the viewed eye fundus image of ophthalmoscope that the observer adopts Fig. 1 light path;
Fig. 3 describes is to adopt Fig. 1 light path from the real image position that illuminator and filament became that window 9 is seen;
Fig. 4 is common direct Oph structure, the light path sketch map of a employing led light source in the prior art;
What Fig. 5 described is the viewed eye fundus image of ophthalmoscope that the observer adopts Fig. 4 light path;
Fig. 6 describes is to adopt Fig. 4 light path from the real image position that illuminator and led light source became that window 9 is seen;
Fig. 7 is structure, the light path sketch map of direct ophthalmoscope of the present utility model;
What Fig. 8 described is the viewed eye fundus image of ophthalmoscope that the observer adopts Fig. 7 light path;
Fig. 9 describes is to adopt Fig. 7 light path from the real image position that illuminator and led light source became that window 9 is seen;
What Figure 10 described is the optical element that has the aspherics surface selected among a kind of embodiment---the structural representation (cutaway view) of LED lens;
What Figure 11 described is the optical element that has the aspherics surface selected among a kind of embodiment---the structural representation (vertical view) of LED lens;
What Figure 12 described is the optical element that has the aspherics surface selected among a kind of embodiment---the structural representation (left view) of LED lens;
What Figure 13 described is the optical element that has the aspherics surface selected among the another kind of embodiment---the product structure sketch map (front view) of LED lens pillar;
What Figure 14 described is the optical element that has the aspherics surface selected among the another kind of embodiment---the product structure sketch map (vertical view) of LED lens pillar;
What Figure 15 described is the optical element that has the aspherics surface selected among the another kind of embodiment---the product structure sketch map (left view) of LED lens pillar.
Wherein: 1 direct ophthalmoscope shell; 2 lamp sockets; 3 bulbs; 4 beam condensing units; 5 spherical mirrors; 6 have the optical element on aspherics surface; 7 projectoscopes; 8 illuminators; 9 windows; 10 peep-holes; 11 refraction compensation lens; 12 check observer's eyes; 13 tested eyes (patient's eye); 14 throw lights; The 15 tested eye illuminated area of seeing by peep-hole; 16 filament real images; The 17LED light source; 18LED light source real image.
The specific embodiment
Embodiment: as shown in Figure 7, a kind of led light source ophthalmoscope, in order to observe patient's optical fundus, it includes light source, beam condensing unit 4, projectoscope device, described light source adopts LED as light source 17, described beam condensing unit 4 converges to the light of light source 17 in the illumination path, and to patient's optical fundus, illuminate the part those who are investigated and observe by the optical fundus with ray cast for described projectoscope device.
Have aspherical lens 6 in the described beam condensing unit 4, add a slice spherical lens 5 again.Spherical lens 5 can be adjusted back exchanging order mutually through distance with the front and back position of aspherical lens 6, can play identical optical effect.
That in the present embodiment, have that the optical element 6 on aspherics surface adopts is LED lens pillar (as Figure 13 to shown in Figure 15).
As Figure 10 to shown in Figure 12 be a commercial LED lens, be exclusively used in great power LEDs such as 1W, 3W supportingly, play the optically focused effect, generally converging the angle has 5 °, 15 °, 25 ° etc.The LED lens generally adopt the PMMA mold pressing to form.
As Figure 13 to shown in Figure 15 be a commercial LED lens pillar, be exclusively used in great power LEDs such as 1W, 3W supportingly, play the optically focused effect, the angle of converging of orthogonal both direction is different.Its structure is at the circular surface of beam projecting face several lens pillars that superpose on LED lens (as Figure 10 to shown in Figure 12) basis.The LED lens pillar generally adopts the PMMA mold pressing to form.
Described beam condensing unit 4 will project patient optical fundus light and narrow down with respect to its vertical direction in a certain direction within the specific limits.Popular says, to near illuminator, be compressed near the led light source real image 18 of circular, square or rectangle etc. exactly near or less than filament real image 16 sizes among Fig. 3, wherein the direction of led light source real image 18 length is approaching parallel with the top edge of illuminator, led light source is thin more good more as 18 wide directions, preferably less than general filament as 16 width 0.2mm, as shown in Figure 9.The such illuminator and the angle of viewing system are between 2 °～4 °, and when having guaranteed that like this size of the tested eye illuminated area 15 that peep-hole 10 sees is bigger, illuminance is bigger, the convenient observation.
What Fig. 8 described is the viewed eye fundus image of ophthalmoscope that the observer adopts Fig. 7 light path, and the tested eye illuminated area 15 that see by peep-hole this moment is approaching with the zone 15 of Fig. 5.
What the LED in the present embodiment adopted is the large power white light LED of a 1W, the about 3200K of colour temperature.
Another embodiment:
Different with first embodiment is that what the optical element that has the aspherics surface 6 in the described beam condensing unit 4 adopted is cylindrical lens.
Certainly, above embodiment only is a preferred concrete example of the present utility model, and led light source ophthalmoscope of the present utility model also can have multiple conversion and remodeling, is not limited to the concrete structure of above-mentioned embodiment.In a word, protection domain of the present utility model should comprise those conspicuous to those skilled in the art conversion or substitute and remodeling.
Claims (8)
1. led light source ophthalmoscope, in order to observe patient's optical fundus, it includes light source, beam condensing unit (4), the projectoscope device, described light source adopts LED (17) as light source, described beam condensing unit (4) converges to the light of light source in the illumination path, described projectoscope device is with the optical fundus of ray cast to the patient, the optical fundus is illuminated the part those who are investigated and is observed, and it is characterized in that: described beam condensing unit (4) includes one at least will project the optical element that has the aspherics surface (6) that patient optical fundus light narrows down with respect to its vertical direction in a certain direction within the specific limits.
2. led light source ophthalmoscope according to claim 1 is characterized in that: described beam condensing unit (4) also comprises at least one spherical lens (5).
3. led light source ophthalmoscope according to claim 1 is characterized in that: described beam condensing unit (4) includes an optical element that has non-spherical surface (6) that can make illuminating ray change shape at least.
4. according to each described led light source ophthalmoscope in the claim 1 to 3, it is characterized in that: the described optical element (6) that has the aspherics surface adopts the optical element that has the cylinder degree.
5. according to each described led light source ophthalmoscope in the claim 1 to 3, it is characterized in that: the described optical element (6) that has the aspherics surface adopts cylindrical lens.
6. according to each described led light source ophthalmoscope in the claim 1 to 3, it is characterized in that: the described optical element (6) that has the aspherics surface adopts lens pillar.
7. according to each described led light source ophthalmoscope in the claim 1 to 3, it is characterized in that: the described optical element (6) that has the aspherics surface adopts the LED lens pillar.
8. led light source ophthalmoscope according to claim 1 is characterized in that: described light source comprises at least one LED that emits white light, its colour temperature at 3000K between the 6000K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520134161 CN2877560Y (en) | 2005-11-30 | 2005-11-30 | LED light source eye examining mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520134161 CN2877560Y (en) | 2005-11-30 | 2005-11-30 | LED light source eye examining mirror |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2877560Y true CN2877560Y (en) | 2007-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520134161 Expired - Fee Related CN2877560Y (en) | 2005-11-30 | 2005-11-30 | LED light source eye examining mirror |
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| Country | Link |
|---|---|
| CN (1) | CN2877560Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109788899A (en) * | 2016-09-21 | 2019-05-21 | Qd激光公司 | laser scanning ophthalmoscope |
| CN111789571A (en) * | 2019-04-09 | 2020-10-20 | 深圳巴久聆科技有限公司 | Dual-purpose ophthalmoscope |
-
2005
- 2005-11-30 CN CN 200520134161 patent/CN2877560Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109788899A (en) * | 2016-09-21 | 2019-05-21 | Qd激光公司 | laser scanning ophthalmoscope |
| CN111789571A (en) * | 2019-04-09 | 2020-10-20 | 深圳巴久聆科技有限公司 | Dual-purpose ophthalmoscope |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070314 Termination date: 20131130 |