CN102397054A

CN102397054A - Binocular indirect ophthalmoscope with LED illumination

Info

Publication number: CN102397054A
Application number: CN2011103731880A
Authority: CN
Inventors: 郑琪
Original assignee: WENZHOU LONGDE MEDICAL TECHNOLOGY Co Ltd
Current assignee: WENZHOU LONGDE MEDICAL TECHNOLOGY Co Ltd
Priority date: 2011-11-22
Filing date: 2011-11-22
Publication date: 2012-04-04

Abstract

A binocular indirect ophthalmoscope with LED illumination comprises an LED light source component, a projecting mirror, a reflector 1, examined eyes, a reflector 2, a reflector 3, an eyepiece and visual contact. A condensing mirror is arranged at the lower side of the LED light source component, and the projecting mirror is arranged at the lower side of the condensing mirror. An aspheric mirror is arranged at the front side of the examined eyes, and the image focal point thereof is lapped with the object focal point of the eyepiece. The illumination which is transmitted by the LED light source component passes through the projecting mirror after being condensed by the condensing mirror, later the illumination transits to the examined eyes through the reflector 1, then the illumination after being transited enters the examined eye grounds through the aspheric mirror, and the visual contact carries out binocular observation on the tissue of the two eye grounds after the illumination light of the tissue of the eye grounds passes through the aspheric mirror, the reflector 3 and the visual contact in turn. A power supply wire (A1), a radiating lamp seat (B1), a heat conducting layer (C1) and an LED (D1) are installed on the LED light source component (1). The heat conducting layer (C1) is arranged between the radiating lamp seat (B1) and the LED (D1) and electrically connected through the power supply wire (A1).

Description

The LED binocular indirect ophthalmoscope that throws light on

Technical field

The present invention relates to a kind of opticianry examination instrument, especially relate to a kind of binocular indirect ophthalmoscope of the LED of employing illumination.

Background technology

Ophthalmoscope is a medical optical instrument indispensable in the examination of ocular fundus, and it is divided into direct ophthalmoscope and two kinds of indirect ophthalmoscopes usually, the inspection of direct ophthalmoscope apart from weak point, the visual field is little, illumination is low, its scope of application exists necessarily and limits to; Binocular indirect ophthalmoscope can obtain good stereovision vision, and have that the depth of field is big, imaging is clear and can teaching, take pictures, advantage such as shooting, thereby the binocular indirect ophthalmoscope inspection technique has become present most convenient, superior examination of ocular fundus method.For example: U.S. Pat 20090096989 binocular indirect ophthalmoscopes have been set forth the structure and the ultimate principle of binocular indirect ophthalmoscope in detail, and from patent, lighting source is the indispensable ingredient of binocular indirect ophthalmoscope.But for a long time, ophthalmoscope comprises that binocular indirect ophthalmoscope adopts electric filament lamp or halogen tungsten lamp as lighting source always, some deficiency below it exists:

1. energy consumption is big: the light efficiency of electric filament lamp and halogen tungsten lamp is generally about 20lm/W even lower, and therefore, the illumination light intensity when making inspection meets the requirements, and must need to use powerful electric filament lamp or halogen tungsten lamp, thereby increase energy consumption.

2. the efficiency of light energy utilization is low: the luminous angle of electric filament lamp and halogen tungsten lamp is 360 degree, and the light of its emission is not utilized effectively, and the efficiency of light energy utilization is low.

3. portability is not good: because the ophthalmoscope energy consumption of electric filament lamp or halogen tungsten lamp illumination is big, often need a power supply box that connects civil power to supply power during actual the use, seriously reduced its portability, limited its range of application.Though the ophthalmoscope that had occurred in recent years adopting the high capacity rechargeable battery power supply is to improve its portability; But because the high energy consumption of lighting source causes the continuous discharge time of battery to be had only about 1 hour; Influenced the normal use of complete machine; In addition, the frequent charge of battery also can its service life, increases the maintenance cost of product.

4. light source life is short: the life-span of electric filament lamp has only tens of hours, though the life-span of halogen tungsten lamp is slightly long, also generally is no more than 100 hours, this means, in the useful life of instrument, needs frequent replacing illuminating lamp, has increased the use cost of product.

5. the light source safety is lower: as heat radiation light source; Contain more infrared composition and certain ultraviolet composition in the emission spectra of electric filament lamp and halogen tungsten lamp; It exists certain light harm to part tissue of eye, therefore, and when using electric filament lamp and halogen tungsten lamp as lighting source; Need take " filtration " measure of necessary infrared and ultraviolet in the optical system, this has increased the complexity of system and the design and the production cost of instrument.

In recent years; Along with LED (Light Emitting Diode; Light emitting diode) technology reaches its maturity; Ophthalmoscope especially direct ophthalmoscope begins to adopt volume is little, energy consumption is low, safe LED as lighting source, has improved the portability of complete machine greatly, has reduced the maintenance cost of instrument.For binocular indirect ophthalmoscope; Use the only external several companies of LED as lighting source at present, domestic then is blank, from the patent situation; Domestic existing patent is LED illumination direct ophthalmoscope (the novel ophthalmoscope of CN200520068829.1; The ophthalmoscope of CN200510122819.6 led light source, the direct ophthalmoscope of a CN200620040429.4 led light source), the patent of still not having LED illumination binocular indirect ophthalmoscope aspect.

Summary of the invention

The purpose of this invention is to provide a kind of LED illumination binocular indirect ophthalmoscope, to overcome the deficiency of prior art.

To achieve these goals, the present invention adopts following technical scheme:

A kind of LED illumination binocular indirect ophthalmoscope; Comprise led light source assembly, projectoscope, illuminator 1, seized eye, illuminator 2, illuminator 3, eyepiece and visual, it is characterized in that condenser lens is arranged under the led light source assembly; Projectoscope is arranged on the condenser lens below; Aspherical mirror is arranged at the dead ahead of seized eye, and its rear focus overlaps with the object focus of eyepiece, and the illumination light that the led light source assembly sends is passed through projectoscope behind condenser lens optically focused; By reflecting mirror 1 it is transferred to seized eye; Illumination light after the turnover gets into seized optical fundus through aspherical mirror, and the illumination emission light of fundus tissue is subsequently successively through behind aspherical mirror, illuminator 3, the eyepiece, by the visual binocular vision of realizing fundus tissue; Led light source assembly (1) is provided with power line (A1), heat radiation lamp socket (B1), heat-conducting layer (C1) and LED (D1), and heat-conducting layer (C1) is arranged between heat radiation lamp socket (B1) and the LED (D1), through being electrically connected of power line (A1).

Preferably, be provided with the light hurdle, its objective is the illumination hot spot that acquisition varies in size at the object focus place of projectoscope.

Preferably, below the light hurdle, be provided with optical filter, its objective is the illumination light that obtains different colours, to improve the contrast of fundus tissue.

Advantage of the present invention is:

1. energy-conservation: the light efficiency of LED can reach more than 5 times of electric filament lamp or halogen tungsten lamp at present, under the situation that obtains equal luminous flux output, its energy consumption have only electric filament lamp and halogen tungsten lamp 1/5th in addition lower, energy-saving effect is very remarkable.This meaning is being distinguished the flavor of, and uses low power LED can obtain and high-power electric filament lamp or the equal illumination light intensity of halogen tungsten lamp.

2. maintenance cost is low: the LED life-span reaches tens thousand of hours, is electric filament lamp and halogen tungsten lamp hundreds of times, this means in the useful life of product, to need not to change illuminating lamp again.In addition,, therefore under the situation of using rechargeable battery to supply power, can effectively prolong the service time of battery, reduce its charging times, improve its service life because that use is low power LED.

3. the efficiency of light energy utilization is high: the emission light of LED has good directivity, and therefore, its efficiency of light energy utilization is higher than electric filament lamp and halogen tungsten lamp.

4. good portability: under the situation of LED illumination, if use rechargeable battery to supply power, can satisfy one fully more than 5 hours its service time

As application demand, the good portability of product.

5. light source is safe: do not contain any ultraviolet and infrared composition that possibly endanger part tissue of eye in the emission spectra of LED, the safety of light source is high.

Description of drawings

Fig. 1 is LED illumination binocular indirect ophthalmoscope structural representation of the present invention;

Fig. 2 is a led light source modular construction sketch map.

Label among the figure: 1-LED light source assembly, 2-condenser lens, 3-light hurdle, 4-optical filter, 5-projectoscope, 6-illuminator 1,7-aspherical mirror, the seized eye of 8-, 9-illuminator 2,10-illuminator 3,11-eyepiece, 12-are visual.

The specific embodiment

In order to deepen to understanding of the present invention, will combine embodiment and accompanying drawing that the present invention is made further detailed description below, this embodiment only is used to explain the present invention, does not constitute the qualification to protection domain of the present invention.

A kind of LED illumination binocular indirect ophthalmoscope; Comprise led light source assembly, projectoscope, illuminator 1, seized eye, illuminator 2, illuminator 3, eyepiece and visual; It is characterized in that condenser lens is arranged under the led light source assembly, projectoscope is arranged on the condenser lens below; The light hurdle places the object focus place of projectoscope, and its effect is the illumination hot spot that acquisition varies in size; Optical filter is arranged on below, light hurdle, and its effect is the illumination light that obtains different colours, to improve the contrast of fundus tissue; Aspherical mirror is arranged at the dead ahead of seized eye; Its rear focus overlaps with the object focus of eyepiece; The illumination light that the led light source assembly sends is after passing through light hurdle, optical filter, projectoscope behind the condenser lens optically focused successively, and with the extremely seized eye of its turnover, the illumination light after the turnover is through the optical fundus of the seized eye of aspherical mirror entering by reflecting mirror 1; The illumination emission light of fundus tissue is subsequently successively through behind aspherical mirror, illuminator 3, the eyepiece, by the visual binocular vision of realizing fundus tissue; Led light source assembly (1) is provided with power line (A1), heat radiation lamp socket (B1), heat-conducting layer (C1) and LED (D1); Heat-conducting layer (C1) is arranged between heat radiation lamp socket (B1) and the LED (D1), and its effect is the heat that LED (D1) distributes to be conducted to heat radiation lamp socket (B1) back fast distribute through cross-ventilation.Through being electrically connected of power line (A1), LED (D1) can be supplied power by rechargeable battery, also can be supplied power by the power supply box of a mains-supplied.

Claims

1. LED illumination binocular indirect ophthalmoscope; Comprise led light source assembly (1), projectoscope (5), illuminator 1 (6), seized eye (8), illuminator 2 (9), illuminator 3 (10), eyepiece (11) and visual (12); It is characterized in that; Condenser lens (2) is arranged under the led light source assembly (1); Projectoscope (5) is arranged on condenser lens (2) below, and aspherical mirror (7) is arranged at the dead ahead of seized eye (8), and its rear focus overlaps with the object focus of eyepiece (11); Led light source assembly (1) is provided with power line (A1), heat radiation lamp socket (B1), heat-conducting layer (C1) and LED (D1), and heat-conducting layer (C1) is arranged between heat radiation lamp socket (B1) and the LED (D1), through being electrically connected of power line (A1).

2. LED illumination binocular indirect ophthalmoscope as claimed in claim 1 is characterized in that the object focus place of projectoscope (5) is provided with light hurdle (3).

3. LED illumination binocular indirect ophthalmoscope as claimed in claim 2 is characterized in that light hurdle (3) below is provided with optical filter (4).