CN103948368B - A kind of for checking the axle position standard of keratometer - Google Patents
A kind of for checking the axle position standard of keratometer Download PDFInfo
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- CN103948368B CN103948368B CN201410161865.6A CN201410161865A CN103948368B CN 103948368 B CN103948368 B CN 103948368B CN 201410161865 A CN201410161865 A CN 201410161865A CN 103948368 B CN103948368 B CN 103948368B
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- axle position
- simulated eye
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- keratometer
- measuring flume
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Abstract
The present invention relates to and a kind ofly to comprise: axle position simulated eye for checking the axle position standard of keratometer, this axle position simulated eye is square cylinder, and wherein one end is ring curved surface, and the other end is plane; Axle position sleeve, this axle position sleeve configuration is positive eight rib body structures, has square through hole in sleeve, and described axle position simulated eye is positioned at the square through hole of this axle position sleeve; Measurement bracket, this measurement bracket has trapezoidal measuring flume, and described axle position sleeve is positioned in trapezoidal measuring flume.The present invention has the axle position simulated eye of different rings curved surface specification by design, and is inserted in the square through hole in eight rib housings, utilizes the trapezoidal measuring flume location of measurement bracket, achieves the inspection of the axle position error of indication of keratometer class gauge.
Description
Technical field
The present invention relates to a kind of for checking the axle position standard of keratometer, belonging to Measuring and Testing Technologies and Instruments field.
Background technology
On clinical ophthalmology, three kinds are mainly contained: wear the treatment of frame eyeglasses, wearing of contact lens and refractive surgery for the ametropic correcting method of patient, for the consideration of safety factors, most patient selects to wear frame eyeglasses or corneal contact lens to rescue ametropia, reaches the object improving vision.Use on the surface because corneal contact lens is directly attached to eye cornea, compare frame eyeglasses and there is advantages such as wearing conveniently, beautiful and comfortable, the visual field is large, prism degree is little, be subject to liking of more and more adolescence in recent years, market share cumulative year after year.Join in process carrying out testing of contact lens, need radius of curvature and the axle position of detecting eye cornea, using the foundation as apolegamy contact lens.In the relevant regulations that State Administration for Quality Supervision and Inspection and Quarantine and State Food and Drug Administration promulgate, require that being engaged in contact lens tests the optician's shop and relevant healthcare institution of joining, keratometer or the rafractive with keratometry function must be equipped with, to solve the measurement of patient's cornea radius of curvature and axle position.In recent years, the measurement of corneal curvature and axle position is also more extensive in the application of area of ophthalmic surgery, as implemented intraocular lens's operation, corneal laser treatment operation for myopia etc. to cataract patient, therefore, the whether accurate contact lens directly having influence on patient of measurement result that this kind equipment of keratometer provides tests aglycon amount and surgical effect.
Whether accurately and reliably to examine or check measurement result that keratometer provides, just need to use corresponding measurement standard to carry out Corneal Curvature meter to test, its axis position is one of important technology index evaluating keratometer, therefore developing and design keratometer axle position standard extremely important, is evaluate corneal curvature meter shaft position to measure whether accurate important means.
Keratometer class gauge realizes corneal curvature radius and axle position by the catoptric imaging of anterior corneal surface to measure, the indicating value of corneal curvature radius can be tested by the sphere of design standard, and the indicating value of corneal axis position then needs design to test with the ring curved surface of corneal astigmatism.Ring curved surface is the part on the surface being rotated around axle by a circular arc and produce, and this axle and above-mentioned circular arc are positioned at same plane, but not by the center of curvature of this circular arc.The radius of curvature of two orthogonal principal meridians of ring curved surface is different, makes paraxial directional light focus on formation two on these two main meridian planes and is separated from each other and vertical focal line, so ring curved surface has different dioptric powers on two main meridian planes.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of axle position standard checking keratometer, can be used for the Precision Test of keratometer and the axle position error of indication with the rafractive of keratometry function.
The invention provides a kind of for checking the axle position standard of keratometer, comprising: axle position simulated eye, axle position sleeve and measurement bracket; Axle position simulated eye is positioned at the square through hole of this eight ribs housing; Axle position sleeve is positioned in the trapezoidal measuring flume of measurement bracket;
Described axle position simulated eye, this axle position simulated eye is square cylinder, and wherein one end is ring curved surface, and the other end is plane;
Described axle position sleeve, comprises eight rib housings, diaphragm, trim ring and bottom, and wherein eight rib housing profiles are positive eight rib body structures, have square through hole in eight rib housings, and described axle position simulated eye is positioned at the square through hole of this eight ribs housing; The two ends of the square through hole of eight rib housings are screw thread, after axle position simulated eye inserts the square through hole of eight rib housings, before the ring curved surface of axle position simulated eye, insert a diaphragm, then fix with externally threaded trim ring, plane one end of axle position simulated eye is fixed with externally threaded bottom.
Described measurement bracket, comprises trapezoidal measuring flume, top board, column and base plate, and described axle position sleeve is positioned in the trapezoidal measuring flume of measurement bracket.The geometric center place of base plate has a tapped through hole, and one end of column has threaded interior hole, and the other end is male connection, and male connection is identical with the tapped through hole diameter of base plate, is arranged on base plate by male connection by column; The axis of top board has a step-like manhole, and have two manholes at distance axis line symmetry place, the step-like manhole of top board is identical with the threaded interior hole diameter of column, utilizes screw to coordinate fixing with the threaded interior hole of column by the step-like manhole of top board; Trapezoidal measuring flume has two identical threaded interior holes, and position and two on a top board manhole is corresponding respectively, and screw is coordinated by the second threaded interior hole of the manhole of top board and the first threaded interior hole of trapezoidal measuring flume and trapezoidal measuring flume to be fixed.Add and ensure that the bottom surface of trapezoidal measuring flume is parallel with the datum level of trapezoidal measuring flume man-hour.
The material of described axle position simulated eye is polymethyl methacrylate (PMMA).
The planar end of described axle position simulated eye is frosted plane.
The planar end of described axle position simulated eye scribbles the coating of brown, to simulate human eye fundus flavimaculatus, and the impact of veiling glare can be reduced.
The described axle position sleeve that axle position simulated eye is housed can rotate in the trapezoidal measuring flume of measurement bracket, to realize the location of axle position simulated eye in 0 °, 45 °, 90 ° and direction, 135 ° of axle positions.
Beneficial effect
1, of the present invention a kind of for checking the axle position standard of keratometer, be there is by design the axle position simulated eye of different rings curved surface specification, and inserted in the square through hole in eight rib housings, utilize the trapezoidal measuring flume location of measurement bracket, achieve the inspection of the axle position error of indication of keratometer class gauge.
2, of the present invention a kind of for checking the axle position standard of keratometer, by the quality control on the surface of countershaft position standard ring curved surface, and strict assembling and positioning program, keratometer and the axle bit trial of rafractive on the direction, disalignment position of 0 °, 45 °, 90 ° and 135 ° with keratometry function can be realized, provide means accurately and reliably for what ensure axle position measurement result, there is the advantage of simple, easy to operate, the easy location of structure.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of axle position of the present invention simulated eye;
Fig. 2 is the schematic diagram of eight rib housings of the present invention;
Fig. 3 is the profile of diaphragm of the present invention;
Fig. 4 is the profile of trim ring of the present invention;
Fig. 5 is the profile of bottom of the present invention;
Fig. 6 is the schematic diagram of trapezoidal measuring flume of the present invention;
Fig. 7 is the schematic diagram of top board of the present invention;
Fig. 8 is the schematic diagram of column of the present invention;
Fig. 9 is the schematic diagram of base plate of the present invention;
Figure 10 is the schematic diagram of axle position of the present invention standard.
Wherein, 1-axle position simulated eye, 2-ring curved surface, 3-plane, the datum level of 4-axle position simulated eye, 5-eight rib housing, 6-square through hole, the datum level of 7-eight rib housing, the bottom surface of 8-square through hole, 9-diaphragm, 10-trim ring, 11-bottom, the trapezoidal measuring flume of 12-, the bottom surface of the trapezoidal measuring flume of 13-, the datum level of the trapezoidal measuring flume of 14-, 15-top board, 16-column, 17-base plate, first threaded interior hole of the trapezoidal measuring flume of 18-, second threaded interior hole of the trapezoidal measuring flume of 19-, 20-manhole, the step-like manhole of 21-, 22-male connection, the threaded interior hole of 23-column, 24-bottom hole, 25-tapped through hole, 26-sponge implant.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Of the present inventionly a kind ofly comprise axle position simulated eye 1, axle position sleeve and measurement bracket for checking the axle position standard of keratometer, its axis position sleeve comprises eight rib housings 5, diaphragm 9, trim ring 10 and bottom 11; Measurement bracket comprises trapezoidal measuring flume 12, top board 15, column 16 and base plate 17.Be mainly used in the axle position error of indication checking keratometer and the rafractive with keratometry function.
As shown in Figure 1, Figure 2 to shown in Figure 10, the invention provides a kind of for checking the axle position standard of keratometer, it is characterized in that, comprise:
Axle position simulated eye 1, this axle position simulated eye 1 is square cylinder, and wherein one end is ring curved surface 2, and the other end is plane 3;
Axle position sleeve, as shown in Figures 2 to 5.This axle position sleeve comprises eight rib housings 5, diaphragm 9, trim ring 10 and bottom 11.The profile of eight rib housings 5 is positive eight rib body structures, has square through hole 6 in eight rib housings 5, and described axle position simulated eye 1 is positioned at the square through hole 6 of this eight ribs housing 5; The two ends of the square through hole 6 of eight described rib housings 5 are screw thread, after axle position simulated eye 1 inserts the square through hole 6 of eight rib housings 5, a diaphragm 9 is inserted before the ring curved surface 2 of axle position simulated eye 1, fix with externally threaded trim ring 10, plane 3 one end of axle position simulated eye 1 is fixed with externally threaded bottom 11 again.
Measurement bracket, as shown in Figures 6 to 9.This measurement bracket comprises trapezoidal measuring flume 12, top board 15, column 16 and base plate 17, and described axle position sleeve can rotate in the trapezoidal measuring flume 12 of measurement bracket, to realize the location of axle position simulated eye 1 in 0 °, 45 °, 90 ° and direction, 135 ° of axle positions.
The material of described axle position simulated eye 1 is polymethyl methacrylate (PMMA).
Fig. 1 is the schematic diagram of axle position of the present invention simulated eye 1.Axle position simulated eye 1 is made up of square cylinder, one of them end face is ring curved surface 2 (simulation has the eye cornea of corneal astigmatism), another end face is frosted plane 3 (retina of simulation human eye), and in frosted plane 3, scribble the coating of brown, to simulate human eye fundus flavimaculatus, the impact of veiling glare during measurement can be reduced simultaneously.
For meeting the axle bit trial of keratometer and the rafractive with keratometry function, need the axle position simulated eye 1 designing different rings curved surface specification.The superhigh precision 3 D measuring instrument UA3P that the ring curved surface 2 crudy PANASONIC that room is deposited by experiment of axle position simulated eye 1 is produced strictly controls.The design load of axle position of the present invention simulated eye 1 ring curved surface 2 is as shown in table 1.
Table 1 axle position simulation eye thimble curved design value
The profile of axle position simulated eye 1 is square column type, one of them face is the datum level 4 of axle position simulated eye, add and require that the axle position of this axle position simulated eye 1 is parallel with the datum level 4 of axle position simulated eye 1 man-hour, after can ensureing that axle position simulated eye 1 is installed to the square through hole 6 of eight rib housings 5 like this, 0 °, 45 °, 90 ° and direction, 135 ° of axle positions that we need can be obtained.
Fig. 2 to Fig. 5 is the schematic diagram of axle position of the present invention sleeve.This axle position sleeve comprises eight rib housings 5, diaphragm 9, trim ring 10 and bottom 11.The profile of eight rib housings 5 is positive eight rib body structures, one side is had to be the datum level 7 of eight rib housings 5 in outer eight faceted pebbles, square through hole 6 is had in eight rib housings 5, the bottom surface 8 of square through hole 6 is parallel with the datum level 7 of eight rib housings 5, the datum level 4 of axle position simulated eye 1 is allowed to overlap with the bottom surface 8 of the square through hole 6 of eight rib housings 5 when assembling like this, to realize the location, 0 ° of axle position of axle position simulated eye 1.Three eight faceted pebbles be counterclockwise connected with the datum level 7 of eight rib housings 5, add and will ensure that adjacent surface angle is 45 ° between two man-hour, rotation eight rib housing 5 is passed through like this when measuring, three eight faceted pebbles that the datum level 7 of conveying eight rib housings 5 is counterclockwise connected overlap with the bottom surface 13 of the trapezoidal measuring flume 12 of measurement bracket successively, can realize 45 ° of axle position simulated eye 1,90 ° and location, 135 ° of axle positions.The two ends of the square through hole 6 in eight rib housings 5 are screw thread, by the effect of at one end assembling trim ring 10, other end assembling bottom 11 plays fixed axis position simulated eye 1.
Fig. 6,7,8,9 is schematic diagrams of measurement bracket of the present invention.This measurement bracket is made up of trapezoidal measuring flume 12, top board 15, column 16 and base plate 17, the geometric center place of base plate 17 has a tapped through hole 25, one end of column 16 has threaded interior hole 23, the other end is male connection 22, male connection 22 is identical with tapped through hole 25 diameter of base plate 17, is arranged on base plate 17 by male connection 22 by column 16; The axis of top board 15 has a step-like manhole 21, and have two manholes 20 at distance axis line symmetry place, the step-like manhole 21 of top board 15 is identical with threaded interior hole 23 diameter of column 16, utilizes screw to coordinate fixing with the threaded interior hole 23 of column 16 by the step-like manhole 21 of top board 15; Trapezoidal measuring flume 12 has two identical threaded interior holes 18 and 19, position and the manhole 20 of two on top board 15 are corresponding respectively, and screw to be coordinated with the first threaded interior hole 18 of trapezoidal measuring flume and the second threaded interior hole 19 by the manhole 20 of top board 15 to be fixed.Add and ensure that the bottom surface 13 of trapezoidal measuring flume 12 is parallel with the datum level 14 of trapezoidal measuring flume man-hour.
Sponge implant 26 is put in plane 3 one end of axle position simulated eye 1, then fixes with externally threaded bottom 11; Insert a diaphragm 9 before the ring curved surface 2 of axle position simulated eye 1, then fix with externally threaded trim ring 10.The clear aperature design load of diaphragm 9 is about 6mm, the pupil of simulation human eye on the one hand, the axle bit trial of dissimilar keratometer and the rafractive with keratometry function can be met on the other hand, and effectively reduce the impact of veiling glare in testing process.
Figure 10 gives the example of axle position of the present invention standard.Foregoing axle position simulated eye 1, axle position sleeve and measurement bracket, by strict assembling and positioning program, the axle position standard that final composition is complete.
The axle position error of indication for checking the axle position standard of keratometer to can be used for checking keratometer and the rafractive with keratometry function provided by the invention.
Specific works process is as follows: first utilize stock screw by the bottom hole 24 of base plate 17 by measurement bracket and tested keratometer or fix with the jaw holder of the rafractive of keratometry function, a spirit level is placed in the bottom surface 13 of the trapezoidal measuring flume 12 of measurement bracket, carries out horizontal adjustment by observation bubble position and ensure that measurement bracket is in level; Then in the trapezoidal measuring flume 12 of measurement bracket, place the axle position sleeve being provided with axle position simulated eye 1, the datum level 7 of eight rib housings 5 is allowed to overlap with the bottom surface 13 of trapezoidal measuring flume 12, now can obtain 0 ° of axle position of axle position simulated eye 1, be used for inspection by the axle position indicating value of test examination instrument in 0 ° of direction; Rotate the axle position sleeve that axle position simulated eye 1 is housed, three eight faceted pebbles that the datum level 7 of conveying eight rib housings 5 is counterclockwise connected overlap with the bottom surface 13 of the trapezoidal measuring flume 12 of measurement bracket successively, 45 ° of axle position simulated eye 1,90 ° and 135 ° of axle positions can be realized, can be used to inspection by test examination instrument respectively in the axle position indicating value in 45 °, 90 ° and 135 ° directions; The axle position indicating value of 0 °, 45 °, 90 ° and the 135 ° four direction that last basis obtains can calculate by the axle position error of indication of test examination instrument, thus realizes the axle bit trial of tested keratometer or the rafractive with keratometry function.
Below by reference to the accompanying drawings the specific embodiment of the present invention is described; but these explanations can not be understood to limit scope of the present invention; protection scope of the present invention is limited by the claims of enclosing, and any change on claim basis is all protection scope of the present invention.
Claims (6)
1., for checking an axle position standard for keratometer, it is characterized in that: comprising: axle position simulated eye (1), axle position sleeve and measurement bracket; Axle position simulated eye (1) is positioned at the square through hole (6) of eight rib housings (5); Axle position sleeve is positioned in the trapezoidal measuring flume (12) of measurement bracket;
Described axle position simulated eye (1), this axle position simulated eye (1) is square cylinder, and wherein one end is ring curved surface (2), and the other end is plane (3);
Described axle position sleeve, comprise eight rib housings (5), diaphragm (9), trim ring (10) and bottom (11), wherein eight rib housing (5) profiles are positive eight rib body structures, have square through hole (6) in eight rib housings (5), described axle position simulated eye (1) is positioned at the square through hole (6) of this eight ribs housing (5); The two ends of the square through hole (6) of eight rib housings (5) are screw thread, after the square through hole (6) of eight rib housings (5) is inserted in axle position simulated eye (1), insert a diaphragm (9) the ring curved surface (2) of axle position simulated eye (1) is front, fix with externally threaded trim ring (10), plane (3) one end of axle position simulated eye (1) is fixed with externally threaded bottom (11) again.
2. a kind of for checking the axle position standard of keratometer as claimed in claim 1, it is characterized in that: described measurement bracket, comprise trapezoidal measuring flume (12), top board (15), column (16) and base plate (17), described axle position sleeve is positioned in the trapezoidal measuring flume (12) of measurement bracket; The geometric center place of base plate (17) has a tapped through hole (25), one end of column (16) has threaded interior hole (23), the other end is male connection (22), male connection (22) is identical with tapped through hole (25) diameter of base plate (17), is arranged on base plate (17) by male connection (22) by column (16); The axis of top board (15) has a step-like manhole (21), and have two manholes (20) at distance axis line symmetry place, the step-like manhole (21) of top board (15) is identical with threaded interior hole (23) diameter of column (16), utilizes screw to coordinate fixing with the threaded interior hole (23) of column (16) by the step-like manhole (21) of top board (15); Trapezoidal measuring flume (12) has two identical threaded interior holes (18) and (19), position is corresponding respectively with two manholes (20) on top board (15), and the second threaded interior hole (19) that screw passes through the manhole (20) of top board (15) and first threaded interior hole (18) of trapezoidal measuring flume and trapezoidal measuring flume coordinates to be fixed; The datum level (14) adding bottom surface (13) and the trapezoidal measuring flume ensureing trapezoidal measuring flume (12) man-hour is parallel.
3. a kind of for checking the axle position standard of keratometer as claimed in claim 1 or 2, it is characterized in that: the material of described axle position simulated eye (1) is polymethyl methacrylate (PMMA).
4. a kind of for checking the axle position standard of keratometer as claimed in claim 1 or 2, it is characterized in that: plane (3) end face of described axle position simulated eye (1) is frosted plane.
5. a kind of for checking the axle position standard of keratometer as claimed in claim 1 or 2, it is characterized in that: coating plane (3) end face of described axle position simulated eye (1) scribbling brown, to simulate human eye fundus flavimaculatus, and the impact of veiling glare can be reduced.
6. a kind of for checking the axle position standard of keratometer as claimed in claim 1 or 2, it is characterized in that: the described axle position sleeve that axle position simulated eye (1) is housed can rotate in the trapezoidal measuring flume (12) of measurement bracket, to realize the location of axle position simulated eye (1) in 0 °, 45 °, 90 ° and direction, 135 ° of axle positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410161865.6A CN103948368B (en) | 2014-04-21 | 2014-04-21 | A kind of for checking the axle position standard of keratometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410161865.6A CN103948368B (en) | 2014-04-21 | 2014-04-21 | A kind of for checking the axle position standard of keratometer |
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| CN103948368A CN103948368A (en) | 2014-07-30 |
| CN103948368B true CN103948368B (en) | 2015-09-16 |
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| CN105571836B (en) * | 2016-01-29 | 2019-02-22 | 中国计量科学研究院 | The calibration method of Vertometer device after a kind of contact lense |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101422356A (en) * | 2007-10-31 | 2009-05-06 | 中国计量科学研究院 | Column lens standard device for detecting objective type optometry instrument |
| CA2837309A1 (en) * | 2011-05-26 | 2012-11-29 | Amo Wavefront Sciences, Llc. | Method of verifying performance of an optical measurement instrument with a model eye and an optical measurement instrument employing such a method |
| CN203841680U (en) * | 2014-04-21 | 2014-09-24 | 中国计量科学研究院 | Axial position standard device used for checking keratometer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000237142A (en) * | 1999-02-19 | 2000-09-05 | Canon Inc | Model eye for optometric apparatus |
| US7066598B2 (en) * | 2003-03-25 | 2006-06-27 | Bausch & Lomb Incorporated | Eye model for measurement |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101422356A (en) * | 2007-10-31 | 2009-05-06 | 中国计量科学研究院 | Column lens standard device for detecting objective type optometry instrument |
| CA2837309A1 (en) * | 2011-05-26 | 2012-11-29 | Amo Wavefront Sciences, Llc. | Method of verifying performance of an optical measurement instrument with a model eye and an optical measurement instrument employing such a method |
| CN203841680U (en) * | 2014-04-21 | 2014-09-24 | 中国计量科学研究院 | Axial position standard device used for checking keratometer |
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