CN200948128Y - Glare comparing sensitivity degree instrument - Google Patents
Glare comparing sensitivity degree instrument Download PDFInfo
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- CN200948128Y CN200948128Y CN 200620042907 CN200620042907U CN200948128Y CN 200948128 Y CN200948128 Y CN 200948128Y CN 200620042907 CN200620042907 CN 200620042907 CN 200620042907 U CN200620042907 U CN 200620042907U CN 200948128 Y CN200948128 Y CN 200948128Y
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Abstract
The utility model discloses a glare contrast sensitivity degree apparatus, which comprises an inputting device, used for inputting tester information; a tester computer, connected with the inputting device, and used for receiving and dealing with the inputting information; an output device, connected with the computer, and used for outputting the computer handled tester information; a glare lighting device, provided the different testing lightness for the tester; a light shielding hood, positioned on the outside of the sensitivity apparatus, and used for shielding the outside light thoroughly and effectively, reducing the outside light to influence on the glare lightness and controlling the influence permitted range. The utility model provides a glare contrast sensitivity degree apparatus used for testing human eyes contrast sensitivity degree with the glare and without the glare.
Description
Technical field
This utility model relates to medical optical utensil and the instrument in the medical apparatus and instruments, and particularly a kind of utilization computer technology detects the human visual function, can substitute especially kind dazzle contrast sensitivity instrument that traditional visual acuity chart optometry is used fully.
Background technology
The eyes are the windows of the mind, because extraneous information more than 85% all is cerebripetal by the eyeball visual system, for meeting the demand of contemporary two Pius XI circle information-intensive societies, press for a kind of advanced person's optometry equipment, because the traditional visual acuity chart (being the international standard visual acuity chart) that detects the human visual function for a long time can only detect the minimum resolution of human eye under the high-contrast, but can not detect the resolving ability of human eye under the low contrast, in fact vision is very complicated, some oculopathy such as glaucoma, retinitis pigmentosa etc., the visual field dwindles, even like tubulose, but its central vision is fair or normal, and this moment, contrast sensitivity reduced; Even increase later the Snazzi degree difference that the contrast vision table also can only detect different contrast level again, only increase the ability of a little prediction identification contrast targets, yet still do not break away from the notion of Snazzi degree than conventional visual acuity chart.Along with the medical science applied continuous development of computer technology, optical technology and ophthalmology optometry, especially the various software programs of computer is perfect day by day, people's softwares such as utilization VC++, DELPHI etc. of having ready conditions can make things convenient for and carry out gray scale and size conversion for freely the image on the liquid crystal display screen, in order to sighting target is realized order of magnitude conversion and tonal gradation conversion, the contrast sensitivity that detects human eye is a kind of new visual performance quantitative check method.Because therefore the change of human eye contrast sensitivity will can detect than visual acuity chart and accurately assess and diagnose dysopia and the visual quality that various ophthalmics cause as early as possible early than the change of Snazzi degree more comprehensively.
Summary of the invention
Goal of the invention of the present utility model is to provide a kind of dazzle contrast sensitivity instrument to be used to detect human eye at the contrast sensitivity that has under dazzle and the free from glare state.The power of its utilization computer produces the conversion regularly of different space frequency and tonal gradation big or small with different light and shade contrasts raster image sighting target down, be presented on the liquid crystal display equipment screen, click the processing of sighting target notice special-purpose computer storage union by the minimum sighting target manual buttons that the experimenter can observe, finally demonstrate the contrast sensitivity curve of experimenter in current testing process, this curve is as abscissa with different spatial frequency (being the striped number difference that light and shade is identical in certain visual angle), contrast (the minimum contrast value that human eye can be discerned) with striped and greyish white brightness is a vertical coordinate again, be about to visual angle and contrast and combine the contrast that mensuration can be differentiated the figure human eye of different space frequency, thereby draw out dazzle contrast sensitivity function curve chart, and directly by printer prints output, this curve can provide more information: low frequency range reflection visual contrast situation; The comprehensive condition of intermediate frequency zone reflection visual contrast and central vision; High frequency region reflection visual acuity, therefore can provide the doctor more comprehensively, the objective appraisal visual function, the prognosis judgement of oculopathy that early discovery is relevant with vision and obstacle and some operation of regaining one's sight etc.
In order to realize the foregoing invention purpose, the technical solution of the utility model is that a kind of dazzle contrast sensitivity instrument is characterized in that described sensitivity instrument comprises: input equipment is used to import experimenter's information; Experimenter experimenter's computer links to each other with described input equipment, is used for receiving and handling described input information; Output device is connected with described computer, is used to export the information experimenter who obtains after described Computer Processing; The dazzle illuminator is tried brightness for the experimenter provides difference; The outer housing that is in the light is arranged on the outside of described sensitivity instrument, is used for the complete extraneous light that effectively blocks, and reduces extraneous light to the influence of dazzle brightness and be controlled within the allowed band.
Reasonable is that described input equipment comprises: observe detection window, be arranged on the front end of described sensitivity instrument; Keyboard links to each other with described computer; The button clicker is connected with described computer by keyboard, input experimenter information; Described output device comprises: first, second display, link to each other with described computer, and described first display is used to show sighting target, described second display shows stored experimenter's described input information; Experimenter's printer is connected with described computer, is used to draw the contrast sensitivity curve.
Reasonable is that described second display is arranged on a side of described sensitivity instrument.
Reasonablely be, it is definite that the brightness of described dazzle illuminator divides basic, normal, high third gear to regulate, be separately implemented under dazzle and free from glare, the light and shade changes in contrast, duplicate detection goes out the identification of human visual function to the sinusoidal grating sighting target of different space frequency.
Reasonablely be, it is inner that described first display is positioned at described device, and the viewing area diameter is 50mm.
Adopt the dazzle contrast sensitivity instrument of technique scheme, realized view data being carried out conversion process to reach the purpose to experimenter's dazzle contrast sensitivity detection by computer.
Description of drawings
Below in conjunction with accompanying drawing the dazzle contrast sensitivity instrument of a preferred embodiment of the present utility model is described, so that more clearly understand above-mentioned feature of the present utility model and advantage:
Fig. 1 is the schematic perspective view of this utility model dazzle contrast sensitivity instrument;
Fig. 2 is the contrast sensitivity function curve chart of the sensitivity instrument of Fig. 1.
The specific embodiment
See also shown in the accompanying drawing 1, dazzle contrast sensitivity instrument of the present utility model comprises: interconnected one observes detection window 1, a dazzle illuminator 2, two liquid crystal displays 3,4, a computer 5, be in the light outer housing 6, a button clicker 7, a keyboard 8, a printer 9 and casing 10, wherein observe the front end that detection window 1 is arranged on casing 10, be used for the experimenter this window of tested eye alignment.Dazzle illuminator 2 is arranged in this casing 10, it is definite that the brightness of this device 2 divides basic, normal, high third gear to regulate, be separately implemented under dazzle and free from glare, the light and shade changes in contrast, duplicate detection goes out the recognition system of human visual function to the sinusoidal grating sighting target of different space frequency, and the printer 8 that connects by outfan is directly drawn out two different contrast sensitivity curves respectively then.
Because that detect is the human visual function, and environment is had certain requirement, the outer housing 6 that is in the light is arranged on casing 10 peripheries, is used for the complete extraneous light that effectively blocks, and reduces extraneous light to the influence of dazzle brightness and be controlled within the allowed band.
In addition, also be provided with a computer 5 in the casing 10, this computer includes CPU, mainboard, power pack and the sensitivity testing software is installed, and this computer 5 connects two faces that 3,4, two display 3,4 of two display are separately positioned on casing 10.Finish information input, date processing and image change processing by computer 5 and edit preservation, one of them positive liquid crystal display 3 simulates real world contrast sensitivity conversion under dazzle and the free from glare environment, and another lateral liquid crystal display 4 shows stored corresponding experimenter's information material.
Contrast sensitivity instrument of the present utility model is to be implemented in the visual performance that detects human eye under different spatial frequencys, different brightness and the different contrast by liquid crystal display 3, computer 5 and dazzle illuminator 2 etc.
Positive liquid crystal display 3 has served as the special-purpose computer screen function fully, show that at center Screen various image sighting targets can clocklike carry out sighting target size conversion and sighting target greyscale transformation (contrast is divided 12 grades) by certain program, and can be adjusted into 1 second the blanking time of image respectively or 2 seconds or 4 seconds.Experimenter's human eye is closely 35 centimeters tests observing the measuring distance of detection window to the front view center Screen, watch the screen sighting target about experimenter's human eye respectively successively attentively, if can see the minimum identification sighting target image under the different space frequency, hand push button clicker 7 is clicked sighting target rapidly, by computer 5 storage calculation process, in time print its contrast sensitivity curve by printer.As shown in Figure 2.
Button clicker 7 wherein directly links to each other with right side keyboard 8, can manually import experimenter's information material, makes the liquid crystal display 4 cases screen form of right flank demonstrate alternative information respective stored between experimenter and the doctor, guarantees to search from now on and contrast.
This utility model utilizes the computer program Control Computer that view data is carried out conversion process to reach the purpose to experimenter's dazzle contrast sensitivity detection.Computer 5 of the present utility model has power, on based on the Windows2000 platform, makes the control of image control and input-output equipment more convenient, and computer 5 is cores of whole instrument thus.Import patient's numbering, age, Back ground Informations such as date by keyboard 8.In test, patient notifies computer 5 impression of eyes by clicker 7, notes the state of each test point, and patient's EOT computer forms the contrast sensitivity curve automatically by the time, last printer 9 prints curve chart, for diagnosis.Before experimenter's test, the doctor imports patient's numbering by the lateral keyboard 8 of instrument, and at the age, Back ground Informations such as date can also be provided with basic parameters such as sighting target display mode, blanking time, persistent period.The test beginning, before the experimenter is put into observation detection window 1 to eyes, when seeing that the sighting target that has on the instrument internal liquid crystal 3 occurs, the experimenter presses clicker 7 immediately, computer 5 is noted the state of this test point, whole EOT, and computer 5 forms the contrast sensitivity curve automatically, last printer 9 prints curve chart, for diagnosis.
See also Fig. 2, be depicted as the contrast sensitivity function curve chart that the sensitivity instrument according to Fig. 1 records, wherein, curve 1 is the sensitivity curve under the free from glare, and curve 2 is for there being the sensitivity curve under the dazzle.As can be seen from Figure 2, under the same space frequency, the experimenter discerns sighting target under free from glare minimum contrast is lower than the minimum contrast under the dazzle is being arranged.And frame of broken lines 3 is illustrated in the sensitivity range of all ages and classes section servant emmetropia.
More than all embodiment only for the explanation this utility model usefulness, but not to restriction of the present utility model, person skilled in the relevant technique, under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or variation, so all technical schemes that are equal to also should belong to category of the present utility model and should be limited by each claim.
Claims (5)
1, a kind of dazzle contrast sensitivity instrument is characterized in that described sensitivity instrument comprises:
Input equipment;
Computer links to each other with described input equipment;
Output device is connected with described computer;
The dazzle illuminator;
The outer housing that is in the light is arranged on the outside of described sensitivity instrument.
2, dazzle contrast sensitivity instrument according to claim 1 is characterized in that,
Described input equipment comprises:
Observe detection window, be arranged on the front end of described sensitivity instrument;
Keyboard links to each other with described computer;
The button clicker is connected with described computer by keyboard;
Described output device comprises:
First, second display links to each other with described computer; Printer is connected with described computer.
3, dazzle contrast sensitivity instrument according to claim 2 is characterized in that,
Described second display is arranged on a side of described sensitivity instrument.
4, according to claim 2 or 3 described dazzle contrast sensitivity instrument, it is characterized in that,
It is definite that the brightness of described dazzle illuminator divides basic, normal, high third gear to regulate.
5, according to the described dazzle contrast sensitivity of claim 4 instrument, it is characterized in that,
It is inner that described first display is positioned at described device, and the viewing area diameter is 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620042907 CN200948128Y (en) | 2006-06-20 | 2006-06-20 | Glare comparing sensitivity degree instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620042907 CN200948128Y (en) | 2006-06-20 | 2006-06-20 | Glare comparing sensitivity degree instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200948128Y true CN200948128Y (en) | 2007-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200620042907 Expired - Fee Related CN200948128Y (en) | 2006-06-20 | 2006-06-20 | Glare comparing sensitivity degree instrument |
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| Country | Link |
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| CN (1) | CN200948128Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101773379A (en) * | 2010-03-15 | 2010-07-14 | 杜学静 | Multifunctional visual contrast sensitivity instrument |
| CN104272078A (en) * | 2012-06-05 | 2015-01-07 | 松下知识产权经营株式会社 | Illumination evaluation device and illumination evaluation method |
| CN108926324A (en) * | 2011-08-09 | 2018-12-04 | 依视路国际公司 | For determining the method for being suitable for one group of eyesight assistor of people |
| CN109640786A (en) * | 2016-07-11 | 2019-04-16 | 视觉科技研究所股份有限公司 | Visual performance inspection and optical characteristics computing system |
-
2006
- 2006-06-20 CN CN 200620042907 patent/CN200948128Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101773379A (en) * | 2010-03-15 | 2010-07-14 | 杜学静 | Multifunctional visual contrast sensitivity instrument |
| CN101773379B (en) * | 2010-03-15 | 2014-01-29 | 杜学静 | Multifunctional visual contrast sensitivity instrument |
| CN108926324A (en) * | 2011-08-09 | 2018-12-04 | 依视路国际公司 | For determining the method for being suitable for one group of eyesight assistor of people |
| CN104272078A (en) * | 2012-06-05 | 2015-01-07 | 松下知识产权经营株式会社 | Illumination evaluation device and illumination evaluation method |
| CN109640786A (en) * | 2016-07-11 | 2019-04-16 | 视觉科技研究所股份有限公司 | Visual performance inspection and optical characteristics computing system |
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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: 20070919 Termination date: 20110620 |