CN204514573U - The measurement mechanism of the effective refractive power of a kind of lens periphery - Google Patents
The measurement mechanism of the effective refractive power of a kind of lens periphery Download PDFInfo
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- CN204514573U CN204514573U CN201520028707.3U CN201520028707U CN204514573U CN 204514573 U CN204514573 U CN 204514573U CN 201520028707 U CN201520028707 U CN 201520028707U CN 204514573 U CN204514573 U CN 204514573U
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- eyeglass
- clamping limb
- turret
- rotating mechanism
- refractive power
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Abstract
The utility model discloses the measurement mechanism of the effective refractive power of a kind of lens periphery, it comprises lensmeter, lensmeter comprises light source and photodetector, wherein, light source and photodetector Relative distribution and be located along the same line, eyeglass to be positioned on described photodetector and between light source and photodetector, measurement mechanism comprises a rotating mechanism further, rotating mechanism and eyeglass are fixed to drive described eyeglass to do three-dimensional rotation along the rotation center of this rotating mechanism, and this rotating mechanism is provided with the gyroscope for monitoring the eyeglass anglec of rotation; Rotation center is positioned in the light path of light source all the time, and distance when this rotation center equals to wear this eyeglass to the distance on lens posterior surface summit between lens posterior surface and pupil center.The utility model drives eyeglass to do three-dimensional rotation by rotating mechanism, for focal power measures the direction of measurement introducing reflection field of view angle, wears rear lens dioptric performance real in peripheral visual field to assess.
Description
Technical field
The utility model relates to a kind of device evaluating lens periphery dioptric performance, and this device not only evaluates eyeglass central authorities, also evaluates the effective refractive power on each field of view angle of lens periphery respectively, makes the measurement of eyeglass dioptric performance adapt to discipline development better.
Background technology
Recent research thinks that the refractive status of retinal periphery is the key factor affecting myopia progression.Retinal periphery is ametropia also cries " periphery out of focus ", and what refer on the direction, visual field (i.e. peripheral visual field, is shown in Fig. 1) that forms an angle with the optical axis is ametropia.Occurred the multiple lens product theoretical based on " control of periphery out of focus " at present on the market, its principle is that the refractive status by correcting peripheral visual field reaches the object controlling myopia.The convention of periphery out of focus clinical research is: the angle of direction of measurement and the tested eye optical axis is field angle to be measured, and field angle is initiated point and is positioned at pupil center.Generally using the refractive status of 20,30, the 40 degree of field angle in horizontal direction nasal side/temporo side as research foundation.At present, the measurement of eyeglass mainly relies on lensmeter and eyeglass activity mapping instrument, and wider with the application of lensmeter method.In activity mapping instrument technology, no matter measured position why, and its direction of measurement is always parallel with eyeglass base cambered surface primary optical axis; In automatic lensometer, direction of measurement always overlaps with the normal of rear surface, surveyed region.Above-mentioned two kinds of methods only measure the power profile on eyeglass primary optical axis direction, measured refractive power does not overlap with peripheral visual field direction, directly cannot reflect the dioptric performance of eyeglass in this orientation, and the performance of " control of periphery out of focus " eyeglass is mainly reflected in peripheral visual field.Therefore, evaluate the usefulness of these mirrors, just need to improve focal power measuring method according to design concept.
Utility model content
In order to solve the problem, the utility model provides the measurement mechanism of the effective refractive power of a kind of lens periphery, it drives eyeglass to do three-dimensional rotation by rotating mechanism, for focal power measures the direction of measurement introducing reflection field of view angle, wears rear lens dioptric performance real in peripheral visual field to assess.
For achieving the above object, the technical scheme that the utility model is taked is: the measurement mechanism of the effective refractive power of a kind of lens periphery, it comprises lensmeter, described lensmeter comprises light source and photodetector, wherein, described light source and photodetector Relative distribution and be located along the same line, eyeglass to be positioned on described photodetector and between light source and photodetector, described measurement mechanism comprises a rotating mechanism further, described rotating mechanism and eyeglass are fixed to drive described eyeglass to do three-dimensional rotation along the rotation center of this rotating mechanism, and, this rotating mechanism is provided with the gyroscope for monitoring the eyeglass anglec of rotation, described rotation center is positioned in the light path of light source all the time, and distance when this rotation center equals to wear this eyeglass to the distance on lens posterior surface summit between lens posterior surface and pupil center.
The turret that described rotating mechanism comprises base and is connected with described base rotation, described eyeglass is fixedly connected with this turret by clamping limb, and described gyroscope is installed on clamping limb or turret.
Described clamping limb is inverted truncated cone-shaped structure, and the upper and lower end face of described truncated cone-shaped structure is fixed with eyeglass and turret respectively, and gyroscope is fixed in this circular platform type structure.
Described clamping limb comprises the first symmetrical clamping limb and the second clamping limb, and the upper/lower terminal of described first clamping limb and the second clamping limb is fixed with eyeglass and turret respectively, and gyroscope is fixed on the first clamping limb or the second clamping limb.
The lower surface of described turret is provided with a ball groove, and the upper surface of described base is provided with the goalpost matched with this ball groove, and described goalpost is installed in this ball groove, drives eyeglass to do three-dimensional rotation along base to make turret.
The lower surface of described turret is provided with a goalpost, and the upper surface of described base is provided with the ball groove matched with this goalpost, and described goalpost is installed in this ball groove, drives eyeglass to do three-dimensional rotation along base to make turret.
Described focal power counts CL-2800.
In the utility model: 1, introduce visual field; 2, the relation in " eyeglass visual field " and the eye visual field (visual field), 3, the measurement index of lens periphery dioptric performance.
The visual field of imaging optical system refers to the areas imaging represented with angular width degree, and size field angle represents.The chief ray (Chief Ray) that field angle refers in visual field somewhere to inject the light beam of intraocular in object space with angle formed by primary optical axis.After wearing glasses, eyeglass and eyeball form imaging optical system (hereinafter referred to as mirror eye system).Mirror eye system described in the utility model has following characteristics: 1) eyeglass and eye coaxial, namely eyeglass primary optical axis overlaps with the eye optical axis; 2) on 1 basis, the distance of lens posterior surface summit and anterior surface of cornea equals mirror eye distance.
Eyeglass is not imaging optical system, just must have visual field in mirror-eye system background.The visual field that the application's definition " eyeglass visual field " has for wearing rear mirror-eye system, it is applied as: regulation convex lens surface is front surface, corresponding space is object space, eyeglass concave surface is rear surface, corresponding space is image space, light beam direct of travel is image space-lens front surface-lens posterior surface-object space, then visual field initiate point (o) to be positioned on the primary optical axis of eyeglass image space, with eyeglass after vertex distance be L place, L be after eyeglass summit to the distance of pupil center; Field angle is is summit with o, launch the angle (Fig. 1) of ray to object space and eyeglass primary optical axis.
Compared with the prior art: the direction of measurement that the utility model is introduced all points to the pupil center wearing rear corresponding eye, therefore always overlapped with peripheral visual field direction, the dioptric performance of eyeglass in peripheral visual field can be embodied, subject and industry development are more pressed close in application.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing peripheral refraction Force meansurement;
Fig. 2 is the structural representation of the measurement mechanism of the effective refractive power of the utility model lens periphery;
Fig. 3 is in Fig. 2, the structural representation after rotating mechanism rotates to an angle.
Embodiment
Below in conjunction with the drawings and specific embodiments, content of the present utility model is described in further details.
Embodiment:
Please refer to shown in Fig. 2, the measurement mechanism of the effective refractive power of a kind of lens periphery, it comprises lensmeter, lensmeter can adopt the CL-2800 lensmeter tester opening up general Kanggong department, lensmeter comprises light source 21 and photodetector 22, wherein, light source 21 and photodetector 22 Relative distribution and be located along the same line, eyeglass 1 to be positioned on photodetector 22 and between light source 21 and photodetector 22, measurement mechanism comprises a rotating mechanism further, rotating mechanism and eyeglass 1 are fixed to drive eyeglass 1 to do three-dimensional rotation along the rotation center of this rotating mechanism, and, this rotating mechanism is provided with the gyroscope 5 for monitoring eyeglass 1 anglec of rotation.
The rotation center of rotating mechanism is positioned in the light path of light source 21 all the time.Distance when distance between rotation center and summit, eyeglass 1 rear surface equals to wear this eyeglass 1 between eyeglass 1 rear surface and pupil center.In the utility model preferred embodiment, point (o) is initiated in the visual field that namely rotation center of rotating mechanism is equivalent in Fig. 1.Be applied in the utility model by the test philosophy of Fig. 1, then field angle initiation point (o) is positioned on the primary optical axis of eyeglass image space, with lens posterior surface vertex distance is L place, and L is the distance of lens posterior surface summit to pupil center; Direction of measurement overlaps respectively with place, each surrounding visual field angle straight line, and with certain cut-in angle by a certain region outside center of lens.Recorded the anglec of rotation of eyeglass 1 by gyroscope 5, thus the effective refractive power at the periphery of eyeglass 1 under certain anglec of rotation can be recorded by lensmeter.
Particularly, the turret 3 that rotating mechanism comprises base 6 and is rotationally connected with base 6, eyeglass 1 is fixedly connected with this turret 3 by clamping limb, and gyroscope 5 is installed on clamping limb or turret 3.Clamping limb can adopt inverted truncated cone-shaped structure, and the upper and lower end face of truncated cone-shaped structure is fixed with eyeglass 1 (preferably near the outward flange of eyeglass 1) and turret 3 respectively, and gyroscope 5 is fixed in this circular platform type structure.The structure of clamping limb 41 in Fig. 2 and clamping limb 42 can certainly be adopted, clamping limb 41 and clamping limb 42 symmetrical, the upper/lower terminal of the two is fixed with eyeglass 1 and turret 3 respectively, and gyroscope 5 is fixed on the first clamping limb 41 or the second clamping limb 42.The lower surface of turret 3 is provided with a ball groove (or goalpost), the upper surface of base 6 is provided with the goalpost (or ball groove) matched with this ball groove (or goalpost), goalpost is installed in this ball groove, drives eyeglass 1 to do three-dimensional rotation along base 6 to make turret 3.
The method adopting the utility model to carry out the effective refractive power measurement of lens periphery is:
1, in target group, record the typical value of mirror eye distance, corneal thickness and ACD, as calculate summit after eyeglass and to initiate to visual field the spacing (L) of point (o) foundation (L=mirror eye distance+ACD-corneal thickness, namely after eyeglass summit to the distance of pupil center).
2, design rotating mechanism, rotating mechanism has clamping limb 41,42, and turret 3 and base 6 are formed, and is installed on by gyroscope 5 on turret 3 or clamping limb 41,42 simultaneously.
2.1, the front end of clamping limb 41,42 connects eyeglass 1, its end connection of rotating frame 3, and place eyeglass 1 on photodetector 22, rotation center is L to the distance of eyeglass 1, and the light path of definition light source 21, through being initial position during the center of eyeglass 1, adjusts gyroscope 5.The combination of base 6 and turret 3 can drive eyeglass 1 to be that radius does limited rotation around x, y, z axle, with L, and the amplitude that turret 3 rotates to any direction is not less than 45 degree.
2.2, in clamping limb 41,42 rotary course, light source 21, photodetector 22 and rotation center are all the time on the same line.
2.3, clamping limb 41,42 rotates rear (as shown in Figure 3), eyeglass primary optical axis place straight line (line of light source 21 and rotation center) and rotation center to eyeglass 1 place, summit, rear surface straight line between angle reflect field angle, the sense of rotation of eyeglass 1 and angle (i.e. field angle) are measured by gyroscope 5.
2.4, record the focal power under postrotational field angle and this field angle, after repetitive measurement, the effective refractive power of periphery of this eyeglass 1 can be obtained.
Above-listed detailed description is illustrating for the utility model possible embodiments, and this embodiment is also not used to limit the scope of the claims of the present utility model, does not allly depart from the equivalence that the utility model does and implements or change, and all should be contained in the scope of the claims of this case.
Claims (7)
1. the measurement mechanism of the effective refractive power of lens periphery, it comprises lensmeter, described lensmeter comprises light source (21) and photodetector (22), wherein, described light source (21) and photodetector (22) Relative distribution and be located along the same line, eyeglass (1) is positioned over described photodetector (22) and goes up and be positioned between light source (21) and photodetector (22), it is characterized in that, described measurement mechanism comprises a rotating mechanism further, described rotating mechanism and eyeglass (1) are fixed to drive described eyeglass (1) to do three-dimensional rotation along the rotation center of this rotating mechanism, and, this rotating mechanism is provided with the gyroscope (5) for monitoring eyeglass (1) anglec of rotation, described rotation center is positioned in the light path of light source (21) all the time, and eyeglass (1) distance between rear surface and pupil center when this rotation center equals to wear this eyeglass (1) to the distance on eyeglass (1) summit, rear surface.
2. the measurement mechanism of the effective refractive power of lens periphery according to claim 1, it is characterized in that, the turret (3) that described rotating mechanism comprises base (6) and is rotationally connected with described base (6), described eyeglass (1) is fixedly connected with this turret (3) by clamping limb, and described gyroscope (5) is installed on clamping limb or turret (3).
3. the measurement mechanism of the effective refractive power of lens periphery according to claim 2, it is characterized in that, described clamping limb is inverted truncated cone-shaped structure, the upper and lower end face of described truncated cone-shaped structure is fixed with eyeglass (1) and turret (3) respectively, and gyroscope (5) is fixed in this circular platform type structure.
4. the measurement mechanism of the effective refractive power of lens periphery according to claim 2, it is characterized in that, described clamping limb comprises symmetrical the first clamping limb (41) and the second clamping limb (42), the upper/lower terminal of described first clamping limb (41) and the second clamping limb (42) is fixed with eyeglass (1) and turret (3) respectively, and gyroscope (5) is fixed on the first clamping limb (41) or the second clamping limb (42).
5. the measurement mechanism of the effective refractive power of the lens periphery according to any one of claim 1-4, it is characterized in that, the lower surface of described turret (3) is provided with a ball groove, the upper surface of described base (6) is provided with the goalpost matched with this ball groove, described goalpost is installed in this ball groove, drives eyeglass (1) to do three-dimensional rotation along base (6) to make turret (3).
6. the measurement mechanism of the effective refractive power of the lens periphery according to any one of claim 1-4, it is characterized in that, the lower surface of described turret (3) is provided with a goalpost, the upper surface of described base (6) is provided with the ball groove matched with this goalpost, described goalpost is installed in this ball groove, drives eyeglass (1) to do three-dimensional rotation along base (6) to make turret (3).
7. the measurement mechanism of the effective refractive power of lens periphery according to claim 1, is characterized in that, described focal power counts CL-2800.
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| CN201520028707.3U CN204514573U (en) | 2015-01-15 | 2015-01-15 | The measurement mechanism of the effective refractive power of a kind of lens periphery |
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| CN201520028707.3U CN204514573U (en) | 2015-01-15 | 2015-01-15 | The measurement mechanism of the effective refractive power of a kind of lens periphery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186955A (en) * | 2018-08-30 | 2019-01-11 | 上海理工大学 | Progressive multi-focus lens distance region binary channels focal power measuring device and method |
| CN109556839A (en) * | 2019-01-08 | 2019-04-02 | 江苏明月光电科技有限公司 | A kind of more optical axis progressive multi-focus lens focal power measuring systems and method |
| CN111938568A (en) * | 2020-08-07 | 2020-11-17 | 温州医科大学附属眼视光医院 | Peripheral refraction detection auxiliary device for optometry unit |
| CN113711003A (en) * | 2019-04-23 | 2021-11-26 | 卡尔蔡司光学国际有限公司 | Method and apparatus for measuring the local refractive power and/or the power profile of an ophthalmic lens |
-
2015
- 2015-01-15 CN CN201520028707.3U patent/CN204514573U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186955A (en) * | 2018-08-30 | 2019-01-11 | 上海理工大学 | Progressive multi-focus lens distance region binary channels focal power measuring device and method |
| CN109556839A (en) * | 2019-01-08 | 2019-04-02 | 江苏明月光电科技有限公司 | A kind of more optical axis progressive multi-focus lens focal power measuring systems and method |
| CN109556839B (en) * | 2019-01-08 | 2024-04-02 | 明月镜片股份有限公司 | Multi-visual axis progressive addition lens focal power measurement system and method |
| CN113711003A (en) * | 2019-04-23 | 2021-11-26 | 卡尔蔡司光学国际有限公司 | Method and apparatus for measuring the local refractive power and/or the power profile of an ophthalmic lens |
| CN113711003B (en) * | 2019-04-23 | 2024-03-08 | 卡尔蔡司光学国际有限公司 | Method and apparatus for measuring the local optical power and/or optical power distribution of an ophthalmic lens |
| CN111938568A (en) * | 2020-08-07 | 2020-11-17 | 温州医科大学附属眼视光医院 | Peripheral refraction detection auxiliary device for optometry unit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20160115 |
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| EXPY | Termination of patent right or utility model |