CN1081350A - Digital instrument for examining eyes of polarized light type - Google Patents
Digital instrument for examining eyes of polarized light type Download PDFInfo
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- CN1081350A CN1081350A CN 92108691 CN92108691A CN1081350A CN 1081350 A CN1081350 A CN 1081350A CN 92108691 CN92108691 CN 92108691 CN 92108691 A CN92108691 A CN 92108691A CN 1081350 A CN1081350 A CN 1081350A
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- polaroid
- object lens
- polarized light
- potentiometer
- lens
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- 230000010287 polarization Effects 0.000 claims abstract description 15
- 239000004606 Fillers/Extenders Substances 0.000 claims abstract description 7
- 238000007689 inspection Methods 0.000 claims abstract description 4
- 230000003287 optical effect Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 5
- 230000009347 mechanical transmission Effects 0.000 claims description 4
- 230000004438 eyesight Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 206010020675 Hypermetropia Diseases 0.000 description 9
- 230000004305 hyperopia Effects 0.000 description 9
- 201000006318 hyperopia Diseases 0.000 description 9
- 208000001491 myopia Diseases 0.000 description 9
- 230000004379 myopia Effects 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 210000001525 retina Anatomy 0.000 description 3
- 201000009310 astigmatism Diseases 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 210000001747 pupil Anatomy 0.000 description 2
- 238000012207 quantitative assay Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
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Abstract
The invention discloses a kind of digital instrument for examining eyes of polarized light type of measuring the human eyesight situation, is comprehensive pin hole principle, linear focusing principle and polarization technology three's optometry equipment.It comprises opticator, mechanical part, digital display portion.Opticator comprises light source, polaroid sighting target, extender lens, focusing object lens, eyepiece, polaroid diaphragm, inspection section.It is installed in respectively in beam expanding lens tube, eyepiece stalk and the axially displaceable objective tube.The potentiometer contact is housed on the object lens,, and amplifies demonstration by circuit along with the mobile contact of object lens is mobile on potentiometer.The present invention is simple for structure, and sighting target is distinct, the precision height.
Description
Patent of the present invention relates to a kind of subjective sense type eye refractometer of measuring human eyesight situation or refractive status, more specifically, relates to a kind of digital instrument for examining eyes of polarized light type.
Accurate believable optometry is the basis of configuration one secondary qualified glasses.At present, the optometry equipment on the market is a lot, as the computer refraction system, and infrared eye refractometer, electronics eye refractometer, laser Speckle Optometer etc.He feels that the prescription of formula eye refractometer is comparatively accurate some of them, but can't popularize because of it costs an arm and a leg.Some other subjective sense type optometry equipment then can't guarantee precision fully because of the standard disunity.Utilizing the pin hole principle to judge the refractive status of human eye, is a kind of more succinct method, early sees the foreign literature of the eighties.Its method is that human eye passes through two pin hole direct observations, one sighting target luminous point, and the two-beam line from luminous point sends enters eyes by two pin holes respectively.If the ophthalmic refractive state is normal, then the two-beam line converges on the retina, can only observe a luminous point picture; If refractive status is unusual, light will be assembled before retina (hypermetropia) behind (myopia) or the retina, can see two luminous point pictures, can judge in view of the above whether the vision state of eyes is normal, but also can't distinguish myopia and hypermetropia, also can't the quantitative assay dioptric optical value.
The purpose of patent of the present invention is to provide a kind of simple in structure according to the pin hole principle, has higher optometry accuracy, the digital instrument for examining eyes of polarized light type that test result is shown by numeral.
For realizing this purpose, the general technical solution of employing is: digital instrument for examining eyes of polarized light type of the present utility model comprises opticator, mechanical part, digital display circuit part 5 three parts.Opticator comprises light source 13, polaroid sighting target 12, extender lens 10, focusing object lens 9, eyepiece 4, polaroid diaphragm 2, inspection section 1.They are installed in respectively in beam expanding lens tube 11, eyepiece stalk 3 and the axially displaceable objective tube 15, and this three is installed in again in the circular outer cylinder 14, and urceolus is supported by support 18.Process tooth bar on the objective tube 15, link with a mechanical transmission mechanism 16.Also be fixed with potentiometer contact 7 on the objective tube 15, rotate handwheel 17, can drive objective tube 15 by mechanical transmission mechanism 16 and move vertically, realize that object lens 9 move axially focusing; Driving potentiometer contact 7 simultaneously slides on slide-wire potentiometer 6.Digital display circuit part 5 comprises power supply 21, slide-wire potentiometer 6 and potentiometer contact 7, voltage amplifier circuit 22, decoding circuit 23 and digital display floater 8.
The advantage of digital instrument for examining eyes of polarized light type is: principle advanced person, combine the pin hole principle, and linear focusing principle and polarization technology are the LINEAR CONTINUOUS focusing during test in one; Adopt the strip sighting target, can improve the mark precision.These technical measures have guaranteed measuring accuracy, reach ± 0.15D; Apparatus structure is succinct, and is in light weight, and volume is little, and the side is portable; Used sighting target is intuitively distinct, and is all applicable to the patient of all ages and classes and different know-hows; Instrument can accurately be measured myopia and hypermetropia diopter numerical value, after making improvements slightly, also can be used for measuring astigmatism; The diopter result who measures can directly be shown by digital indication mechanism.
Patent of the present invention can be used for accurately measuring the myopia and the hypermetropia refractive diopter of eyes, through suitable improvement, can be as between tested eye and polaroid diaphragm, adding one around the Dover prism that optical axis rotates, and patent of the present invention also can be used for measuring the astigmatism of eyes.
Below in conjunction with accompanying drawing, the principle and the structure of digital instrument for examining eyes of polarized light type are done a detailed description.
Fig. 1 is a best longitudinal sectional view of implementing according to the digital instrument for examining eyes of polarized light type of patent of the present invention;
Fig. 2 is the polarization fundamental diagram of digital instrument for examining eyes of polarized light type shown in Figure 1;
Fig. 3 is the LINEAR CONTINUOUS focus adjusting mechanism optical schematic diagram of digital instrument for examining eyes of polarized light type shown in Figure 1;
Fig. 4 is total index path of digital instrument for examining eyes of polarized light type shown in Figure 1;
Fig. 5 is the digital display circuit schematic diagram of digital instrument for examining eyes of polarized light type shown in Figure 1;
Fig. 6 is the mechanical transmissioning machine composition of digital instrument for examining eyes of polarized light type shown in Figure 1.
Digital instrument for examining eyes of polarized light type is to replace little luminous point with polarization GUANGTIAO sighting target, and with polarization diaphragm replacement pinhole plate, make that observed sighting target is not a shape but linear, uncertainty when avoiding effectively differentiating myopia with hypermetropia, improve the aligned accuracy of two halves GUANGTIAO simultaneously, to guarantee measuring accuracy.Be that accurate quantification ground measures the refractive status of eyes, adopt the opticator of linear focusing, characteristics are that it is linear with the axial displacement of object lens to the refractive correction amount of eyes, and can realize continuous focusing, and this is the important assurance of raising measuring accuracy.Test philosophy requires sighting target to be positioned at infinite distant place, introduce an extender lens for this reason, the GUANGTIAO sighting target is placed its focus place, from the light of GUANGTIAO by behind the extender lens with parallel outgoing, can make sighting target be positioned at the infinity by optical means dexterously like this, mechanical adjustment machinery has adopted rack and pinion drive mechanism, and the rotation handwheel can drive objective tube by drive mechanism and endwisely slip, and realizes the LINEAR CONTINUOUS focusing of object lens.Be fixed with a potentiometer contact on the objective tube, it can move on the slide-wire potentiometer that is fixed on the urceolus with moving of objective tube, and this mechanism converts displacement signal (corresponding to tested dioptric optical value) to the electric potential signal of contact.Circuit part then amplifies this electric potential signal, and decoding is shown with dioptric form by digital display floater again.During work, tested eye 19 can be seen the microscler GUANGTIAO 20 of two halves by inspection section 1.Rotate handwheel 17, drive object lens 9 through drive mechanism 16 and move axially focusing, make the two halves GUANGTIAO of seeing become conllinear by fork gradually, the show value of at this moment digital display floater 8 is exactly the dioptric optical value of tested eye 19.
Fig. 2 is the polarization fundamental diagram of digital instrument for examining eyes of polarized light type shown in Figure 1.Respectively in level and vertical direction, and be symmetrical in the polaroid sighting target of arranging about optical axis 12 from a pair of polarization direction of the irradiate light of light source 13, form a microscler GUANGTIAO.19 of tested eye by another to the polarization direction respectively in level and vertical direction, be symmetrical in the polaroid diaphragm 2 that optical axis arranges up and down and observe these GUANGTIAO.Adopting the purpose of strip sighting target is to be convenient to distinguish myopia and hypermetropia, and helps the aligning of two halves GUANGTIAO.According to polarization theory, left half GUANGTIAO can only enter tested eye by first diaphragm and pupil the first half, and right half GUANGTIAO then can only enter tested eye by second diaphragm and second pupil, so tested eye 19 can be observed the microscler GUANGTIAO 20 of two halves.Myopia, normal eye and hypermetropia will be seen three kinds of GUANGTIAO forms respectively: a) myopia is seen that the GUANGTIAO lower-left is upper right and is staggered, d) the normal GUANGTIAO conllinear that arrives soon, c) hypermetropia sees that the upper left bottom right of GUANGTIAO staggers.So convenient and solved qualitative discrimination problem intuitively to ophthalmic refractive state (myopia, hypermetropia or normal).
Fig. 3 is the LINEAR CONTINUOUS focus adjusting mechanism of digital instrument for examining eyes of polarized light type shown in Figure 1, and this mechanism places between polaroid sighting target 12 and the polaroid diaphragm 2 coaxially.The polaroid sighting target, and is symmetrical in the polaroid arranged about optical axis and constitutes respectively in the vertical and horizontal direction by two polarization directions, and the polaroid diaphragm also is made of the polaroid of two polarization direction vertical and horizontals, and they are symmetrical in optical axis and arrange up and down.The effect of this mechanism corrective lens variable with inserting regulated quantity is suitable.Eyepiece 4 fixed-site of mechanism, tested eye 19 is in the focal point F of eyepiece 4
' 1The place is observed, and object lens 9 can move axially focusing, makes the observed GUANGTIAO of tested eye 19 20 become conllinear by fork.At this moment the diopter Q=-1/X '=X/f ' of the regulated quantity X of object lens 9 and tested eye 19
2 1Become linear relationship one to one, according to the size of regulated quantity X, can quantitative assay tested eye dioptric optical value.Because object lens 9 all can be realized continuous focusing in whole test specification, and have linear relationship between the diopter Q of regulated quantity X and tested eye, therefore can guarantee higher measuring accuracy.
Fig. 4 is total index path of digital instrument for examining eyes of polarized light type shown in Figure 1, and this is one and comprises polarization shown in Figure 2 mechanism, linear focus adjusting mechanism shown in Figure 3 and light source 13, the coaxial light path mechanism of extender lens 10.Light source 13 irradiation polaroid sighting targets 12 form polarization direction level and vertical two halves GUANGTIAO respectively.Polaroid sighting target 12 places the focus place of extender lens 10, makes two kinds of parallel outgoing of polarized light, and the optical image that is equivalent to polaroid sighting target 12 is positioned at the infinity.Form the LINEAR CONTINUOUS focus adjusting mechanism by axially displaceable object lens 9 with fixed eyepiece 4.Polaroid diaphragm 2 is near the tested eye position, and tested eye 19 is observed at the focus place of eyepiece 4.After the axial internal clearance X of object lens 9 converts electric potential signal to, show with dioptric form by digital display floater 8.
Fig. 5 is the digital display circuit schematic diagram of digital instrument for examining eyes of polarized light type shown in Figure 1.Slide-wire potentiometer 6 two ends are added with constant voltage, so the current potential of potentiometer contact 7 and its displacement are linear, and this displacement is exactly the focusing displacement X of object lens 9.So just, between the focusing displacement X of potentiometer contact current potential and object lens, set up linear relationship one to one.Voltage amplifier circuit 22 amplifies potentiometer contact electric potential signal, converts digital signal to through decoding circuit 23 again, is shown by digital display floater 8 at last.Through demarcating, digital displaying value is tested dioptric optical value.
Fig. 6 is the mechanical transmissioning machine composition of digital instrument for examining eyes of polarized light type shown in Figure 1.Left side figure is the longitudinal sectional view of drive mechanism, and right figure is the transverse sectional view of drive mechanism.This mechanism comprises joint shaft gear 28, and outer wall is processed with the objective tube 15 of tooth bar, urceolus 14, gear shaft support 24,25, handwheel 17 and hold-down screw 26,27.Joint shaft gear 28 is assemblied on gear shaft support 24 and 25, and gear shaft support 24,25 is fixed on the urceolus 14 by hold- down screw 26,27 again, processes tooth bar on the objective tube 15 that can slide in urceolus 14, these rack and pinion 28 engagements.Rotate handwheel 17, but driven gear 28 sway, and in urceolus 14, slide vertically by rack drives objective tube 15, so also just realized the focusing that moves axially of object lens.Potentiometer contact 7 is fixed on the objective tube 15, can move axially with objective tube, meanwhile, potentiometer contact 7 also slides on fixed slide-wire potentiometer 6, will the object lens corresponding move the focusing amount and convert electric potential signal to tested dioptric optical value, after the digital display circuit shown in the accompanying drawing 5 is handled, directly show again with dioptric form.
Claims (2)
1, a kind of digital instrument for examining eyes of polarized light type is characterized in that it comprises light character segment, mechanical part, digital display circuit part (5); Opticator comprises light source (13), polaroid sighting target (12), extender lens (10), focusing object lens (9), eyepiece (4), polaroid diaphragm (2), inspection section (1), they are installed in beam expanding lens tube (11) respectively, in eyepiece stalk (3) and the axially displaceable objective tube (15), this three is installed in again in the circular outer cylinder (14), urceolus is supported by support (18), objective tube processes tooth bar on (15), link with a mechanical transmission mechanism (16), also be fixed with potentiometer contact (7) on the object lens (15), rotate handwheel (17), can pass through mechanical transmission mechanism (16) drive objective tube (15) and move, realize that object lens (9) move axially focusing along axle; Drive potentiometer contact (7) simultaneously and go up slip at slide-wire potentiometer (6); Digital display circuit partly comprises power supply (21), slide-wire potentiometer (6) and potentiometer contact (7), voltage amplifier circuit (22), decoding circuit (23) and digital display floater (8).
2, a kind of digital instrument for examining eyes of polarized light type according to claim 1, it is characterized in that: the polaroid sighting target by two polarization directions respectively in the vertical and horizontal direction, and being symmetrical in the polaroid of arranging about optical axis constitutes, the polaroid diaphragm also is made of the polaroid of two polarization direction vertical and horizontals, and they are symmetrical in optical axis and arrange up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92108691 CN1081350A (en) | 1992-07-20 | 1992-07-20 | Digital instrument for examining eyes of polarized light type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92108691 CN1081350A (en) | 1992-07-20 | 1992-07-20 | Digital instrument for examining eyes of polarized light type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1081350A true CN1081350A (en) | 1994-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92108691 Pending CN1081350A (en) | 1992-07-20 | 1992-07-20 | Digital instrument for examining eyes of polarized light type |
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| CN (1) | CN1081350A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100488442C (en) * | 2006-12-31 | 2009-05-20 | 温州医学院眼视光研究院 | Detector for detecting binocular vision unequal images |
| CN104510440A (en) * | 2015-01-14 | 2015-04-15 | 黑龙江省医学科学院 | Simple vision test instrument |
| CN105974572A (en) * | 2016-07-25 | 2016-09-28 | 京东方科技集团股份有限公司 | Hand-held microscope |
| CN105996973A (en) * | 2016-05-10 | 2016-10-12 | 吉林大学 | Optometry system based on integral optometry unit |
| CN107307844A (en) * | 2017-07-21 | 2017-11-03 | 温州星康医学科技有限公司 | A kind of intelligent visual function preliminary examination instrument |
| CN108681078A (en) * | 2018-08-10 | 2018-10-19 | 深圳纳德光学有限公司 | A kind of head-mounted display diopter adjusting digital display device |
| CN108919497A (en) * | 2018-08-10 | 2018-11-30 | 深圳纳德光学有限公司 | A kind of head-mounted display diopter adjusting digital display mechanism |
| CN109567736A (en) * | 2017-09-28 | 2019-04-05 | 依视路国际公司 | The method that perception measurement device and making uses it to measurement eyesight |
-
1992
- 1992-07-20 CN CN 92108691 patent/CN1081350A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100488442C (en) * | 2006-12-31 | 2009-05-20 | 温州医学院眼视光研究院 | Detector for detecting binocular vision unequal images |
| CN104510440A (en) * | 2015-01-14 | 2015-04-15 | 黑龙江省医学科学院 | Simple vision test instrument |
| CN105996973A (en) * | 2016-05-10 | 2016-10-12 | 吉林大学 | Optometry system based on integral optometry unit |
| CN105974572A (en) * | 2016-07-25 | 2016-09-28 | 京东方科技集团股份有限公司 | Hand-held microscope |
| CN105974572B (en) * | 2016-07-25 | 2019-02-22 | 京东方科技集团股份有限公司 | A kind of hand-held microscope |
| CN107307844A (en) * | 2017-07-21 | 2017-11-03 | 温州星康医学科技有限公司 | A kind of intelligent visual function preliminary examination instrument |
| CN109567736A (en) * | 2017-09-28 | 2019-04-05 | 依视路国际公司 | The method that perception measurement device and making uses it to measurement eyesight |
| CN108681078A (en) * | 2018-08-10 | 2018-10-19 | 深圳纳德光学有限公司 | A kind of head-mounted display diopter adjusting digital display device |
| CN108919497A (en) * | 2018-08-10 | 2018-11-30 | 深圳纳德光学有限公司 | A kind of head-mounted display diopter adjusting digital display mechanism |
| CN108919497B (en) * | 2018-08-10 | 2024-03-26 | 深圳纳德光学有限公司 | Diopter adjusting digital display mechanism of head-mounted display |
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