CN86206961U - Artificial crystal tester - Google Patents
Artificial crystal tester Download PDFInfo
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- CN86206961U CN86206961U CN 86206961 CN86206961U CN86206961U CN 86206961 U CN86206961 U CN 86206961U CN 86206961 CN86206961 CN 86206961 CN 86206961 U CN86206961 U CN 86206961U CN 86206961 U CN86206961 U CN 86206961U
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- tester
- intraocular lenses
- artificial intraocular
- artificial
- millimeters
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Abstract
The utility model provides an artificial crystal tester which is a special instrument for the clinical transplantation of crystals in ophthalmology, and is also an instrument with high precision for producing artificial crystals. The artificial crystal tester is designed from optical microlens for measurements on the basis that an artificial lens is considered as a substituted optical element for a crystalline lens in an eyeball. The artificial crystal tester has the advantages of compact conformation, cordwood, harmonious color, beautiful shape, small volume and light weight. The artificial crystal tester which adopts two-orbit (soft triangle) gliding can be operated by a single person, and the main parameters of a crystalline lens (artificial lens) can be measured basically, and accordingly, the quality of the artificial lens can be evaluated, and reliable scientific evidence can be provided for the clinical transplantation of the artificial lens.
Description
This utility model is a kind of artificial intraocular lenses's test instrunment that is used to check artificial intraocular lenses's (crystalline lens), particularly can testing elastic silicon gel artificial intraocular lenses.Can make the special equipment of clinical ophthalmology crystal implantation technique.It is to belong to medical optical instrument.
According to patent searching document and the scientific and technological information grasped, the minimum focometer of grand celebration optical instrument factory, Shanghai production now is the f=150 millimeter, it is collimator by 550 millimeters of focal lengths, three-jaw rigid holder and visual micrometer system and triangle guide rail are formed, inflexible measured piece is placed clamper, select 0.5 or 1 times standby pre-objective, can measure some data by the eyepiece micrometer system, but can not be used for the artificial intraocular lenses, the 348th～555 page of the 88th the 3rd phase of volume of JAMA, report in " artificial intraocular lenses " literary compositions in 1979: " artificial intraocular lenses's collimator " only has collimating light pipe partly, in fact do not form a complete instrument, and to only can measure inflexible lucite artificial intraocular lenses by two people's operations.Silicon gel artificial intraocular lenses's characteristics are that volume is little, focal length is short, and the visible resolution height requires the alignment of whole system to get well during measurement, next is can have to be suitable for measuring the crystalline clamper of elasticity, and therefore general focometer can not be measured some above-mentioned parameters come.
The purpose of the invention provides a kind of testing instruments of estimating artificial crystalline quality standard.
This utility model is finished by following mode, utilizes artificial intraocular lenses's tester to measure crystalline detectability, and focal length punctate opacity of the cornea diffraction value is estimated artificial crystalline quality, adopts fixedly artificial intraocular lenses of the moderate suction ring of magnetic.During measurement the artificial intraocular lenses is inserted in the clamper, then with resolution chart, glass sieve plate and star tester are inserted respectively on the image planes of collimating light pipe, tested artificial intraocular lenses respectively with above-mentioned optical information imaging on crystalline focal plane, can measure the group number of detectability by the eyepiece micrometer system of 5 times pre-objectives and 17 times.Computation of table lookup can draw the value of visual resolution then, the situation that 1 times of pre-objective of reuse is measured focal length and observed the punctate opacity of the cornea diffraction.
Table one: the group number of detectability and the angle of resolution value live width line are to concerning:
The collimation focal length of collimator and the count of resolving power test target designs by following principle: as if artificial intraocular lenses's diameter phi=4 millimeter, then theoretical resolution is α=120/4=30 second, the minima of the angular resolution of WT1005 in this instrument～62 resolution charts (N.2) is 27.502 seconds, maximum (N.3) is 110.008 seconds, the scope of the linear resolution value that can directly measure be 12.5～50 lines right/millimeter, suppose that crystalline performance approaches the optical lens of diameter phi=4.Get crystalline reality respectively rate be 40 seconds, focal length is 5～25 millimeters, focal length by experience collimation collimator is preferably tested crystalline 3～4 times, irrelevant because of tested crystal again simultaneously with the object lens of collimation collimator, so only it is also noted that tested crystal is only relevant with its placement location in orbit, promptly consider the position aberration, the problem of next is when calculating crystal resolution, want suitably through the multiple after the visual amplification, therefore multiple is relevant with the focal length of collimating light pipe, thus we get the focal distance f of collimating light pipe '
Flat=150 millimeters, if minima is y between the groove of optical signalling plate group, the angle of visual field of collimation collimator is W, and y=f ' is then arranged
FlatThe tgw relation
Taken the logarithm in the following formula both sides:
Lgy＝Lg
＋Lgtgw
Behind the differential
(dy)/(y) ＝
＋ (dtgw)/(tgw)
When the w value is very little, can myopia get:
dtgw＝dw tgw＝w
Then following formula can be simplified to:
(dw)/(w) ＝ (dy)/(y) －
Can draw the error that angle of visual field value W is mainly derived from the manufacturing of groove and collimates the objective focal length of collimator by following formula calculating.
If establishing ruling span y does not have foozle, when then dy and W value are constant, f
Big more its dy/y value is littler, in other words, is 140～150 millimeters to the focal length optimum of the collimation collimator of groove foozle dy under the similarity condition and same angle value W.After tentatively determining, focal length just can probably estimate the just size of big or small and other optical signalling plate group of a picture of resolution chart.
Get angle of visual field W=5 ° of visual field of collimation collimator, then the diameter of optical signalling plate group is by formula D
0=2f
Calculate among the tgw and be derived as 26.2 millimeters, 25 groups of groove pictures should not surpass this value yet in the resolution chart, can fill just tested crystalline effective aperture by tested crystalline light beam this moment, and the resolution group number that records from tester promptly can be converted into visual resolution value through tabling look-up.By " paying section " law following relationship is arranged:
The actual visible resolution value=value of tabling look-up *
The f crystalline substance is artificial intraocular lenses's focal length value, can record by glass sieve plate.
Utilize the similar principle can the crystalline physical dimension of untouchable measurement.
Advantage of the present utility model is that it can accurately measure artificial intraocular lenses's detectability.Focal length value and crystalline microcosmic face shape, the while also can be measured the physical dimension of profile.Accuracy of reading can reach 0.01 millimeter, and it is poor that the punctate opacity of the cornea diffraction can be measured quarter-wave shape.It is that the moderate suction ring of magnetic attraction fixes that this utility model adopts the clamping tool that is fit to the elasticity measured piece, it is 6 millimeters that magnetic is inhaled the ring internal diameter, 10 millimeters of external diameters, thick 2 millimeters, magnetic is inhaled the ring nationality and is helped magnetic force 0.2 millimeter stainless steel substrates is held, and just tested artificial intraocular lenses is clipped.On laser plane interferometer, check crystal is not produced clamping stress, the crystalline quality situation of real reaction, need only people's operation during measurement, conveniently measure the crystalline related parameter that has intuitively, corresponding calculated formula and form have also been derived simultaneously, because artificial intraocular lenses's tester has been arranged, just can check crystalline quality and relevant numerical value, make the ophthalmologist that foundation arranged when transplanting crystal.
Below in conjunction with accompanying drawing this utility model is described.
Fig. 1, be that concrete structure longitudinal profile of the present utility model is always schemed.
Fig. 2, be index path of the present utility model.
Fig. 3, be the profile of collimation collimator of the present utility model (1) and debugging frame (2).
Fig. 4, be visual micrometer system figure of the present utility model.
With reference to Fig. 1, the good collimation collimator (1) that minimum parallax is arranged of levelling is fixed on inside stably and is equipped with on 6.3 volts the power supply box, needn't align during use; A tested artificial crystalline levelling frame of clamping (2).(5) among Fig. 2 are two cemented objectives of collimation collimator, focal length is 140～150 millimeters, relative aperture is 1:5, and (2) are optical signalling plate group, places respectively according to different purposes on the image planes of collimation collimator, (4) be the punctate opacity of the cornea diffractive plate, the diameter of its punctate opacity of the cornea is 0.265 millimeter, can measure crystalline various diffraction pattern, closely can obtain the situation of various aberrations intuitively, as spherical aberration, coma etc.If the crystal defectiveness can be observed out by the diffraction pattern of punctate opacity of the cornea, its defect level is that quarter-wave can both reflect, and (6) are crystal, and (7) are 5 times of pre-objectives, and operating distance is 49 millimeters, and (8) are 1 times of pre-objective.Operating distance is 49 millimeters, and (9) are 17 times of visual micrometer systems.(2) for the adjustable clamper of three degree of freedom is arranged, the moderate suction ring of magnetic force is arranged in the frame, its structure is seen (3), (4), (5) and (6) in the bottom graph, during work detected pieces there is minimum stress, (1) and (3) is respectively the micro-pre-objective group of 1 times and 5 times among Fig. 4, (2) be ocular screw micrometer, 0.01 millimeter of accuracy of reading, the guiding mechanism that (4), (5), (6) and (7) are respectively each degree of freedom can guarantee that tested artificial intraocular lenses and visual observation system have favorable mechanical optics alignment.
Claims (6)
1, artificial intraocular lenses's tester is the optical testing instrument of a kind of Direct Test artificial intraocular lenses (crystalline lens) parameter, and this utility model is formed by collimating collimator [1] and crystal clamper [2] and the visual micrometer system of microscope [3]; Feature of the present utility model is to be equipped with glass sieve plate (1 among Fig. 2) resolution chart (3 among Fig. 2), star tester (4 among Fig. 2) on the front focus of the object lens (5 among Fig. 3) in the collimator [1]; A collet is arranged on the clamper [2], clip a magnetic in the middle of the chuck and inhale ring (2 among Fig. 2); The pre-objective that can change mutually (1 among Fig. 4 and 3) is arranged in the visual micrometer system of microscope [3].
2, by the described artificial intraocular lenses's tester of claim (1), the focal length that it is characterized in that its collimating light pipe object lens is 140～150 millimeters, and relative aperture is 1:5.
3, by the described artificial intraocular lenses's tester of claim (1), it is characterized in that using two 25 prescription shaped as frame resolution charts, first live width is by 10.0～20.0 microns.Angular resolution was by 27.502～55.004 seconds, and second live width is by 1.0～40.0 microns, and angular resolution was by 27.502～110.008 seconds.
4, by the described artificial intraocular lenses's tester of claim (1), the diameter that it is characterized in that its punctate opacity of the cornea is 0.265 millimeter.
5, by the described artificial intraocular lenses's tester of claim (1), it is characterized in that it is 6 millimeters that magnetic is inhaled the internal diameter of ring, external diameter is 10 millimeters, thick is that 2 millimeters magnetic attraction are suitable, and minimum clamping stress is arranged this moment.
6, by the described artificial intraocular lenses's tester of claim (1), it is characterized in that focal length measurement with 5 times of pre-objectives, Measurement Resolution is with 1 times of pre-objective.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86206961 CN86206961U (en) | 1986-09-13 | 1986-09-13 | Artificial crystal tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86206961 CN86206961U (en) | 1986-09-13 | 1986-09-13 | Artificial crystal tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86206961U true CN86206961U (en) | 1988-02-10 |
Family
ID=4809497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86206961 Ceased CN86206961U (en) | 1986-09-13 | 1986-09-13 | Artificial crystal tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86206961U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103565406A (en) * | 2012-07-30 | 2014-02-12 | 佳能株式会社 | Ophthalmologic apparatus and alignment method |
-
1986
- 1986-09-13 CN CN 86206961 patent/CN86206961U/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103565406A (en) * | 2012-07-30 | 2014-02-12 | 佳能株式会社 | Ophthalmologic apparatus and alignment method |
| CN103565406B (en) * | 2012-07-30 | 2015-09-23 | 佳能株式会社 | Ophthalmologic apparatus and ophtamological method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |