CN111110182B - Lens group structure for vision detection and vision detection method - Google Patents
Lens group structure for vision detection and vision detection method Download PDFInfo
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- CN111110182B CN111110182B CN201911374880.8A CN201911374880A CN111110182B CN 111110182 B CN111110182 B CN 111110182B CN 201911374880 A CN201911374880 A CN 201911374880A CN 111110182 B CN111110182 B CN 111110182B
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- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
- A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
- A61B3/04—Trial frames; Sets of lenses for use therewith
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Abstract
The invention provides a lens group structure for vision detection, belonging to the technical field of computer algorithm, and the lens group structure for vision detection comprises: support, adapter sleeve, first lens, adjusting collar and second lens. The first lens is arranged on the inner side of one end of the connecting sleeve. The adjusting sleeve is in threaded connection with the other end of the connecting sleeve, and a first limiting part is arranged on the inner wall of the adjusting sleeve. One side of the second lens is abutted against the other end of the connecting sleeve, and the other side of the second lens is abutted against the first limiting piece; the first limiting piece is used for adjusting the curvature of the second lens in a matching way with the connecting sleeve; the outer edge of the second lens is arranged at a certain distance from the inner wall of the connecting sleeve. The first lens, the connecting sleeve and the second lens form a light transmitting area; the first lens and the second lens form a lens assembly; the lens assembly adjusts diopter by means of the first limiting piece. The invention also provides a vision detection method. The lens group structure for vision detection and the vision detection method provided by the invention can improve the efficiency of vision detection.
Description
Technical Field
The invention belongs to the technical field of computer algorithms, and particularly relates to a visual acuity detection lens group structure and a visual acuity detection method using the same.
Background
The glasses are lens pieces embedded in the glasses frame, are worn in front of the glasses and are used for improving eyesight, protecting the glasses and the like. During the process of fitting the spectacles, the optometry is generally required first, and then the fitting is required. The optometry mainly detects the left and right eye degree, astigmatism and pupil distance. Astigmatism and interpupillary distance can be measured directly by simple tools. The existing left and right eye power is determined by an optometry instrument. Because the degree of the eyes about can only roughly be known in the optometry, still need wear the glasses of a plurality of different degrees after the optometry, the final lens that confirms is most suitable, and this process is comparatively loaded down with trivial details for visual detection process efficiency is lower.
Disclosure of Invention
The invention aims to provide a lens group structure for vision detection and a vision detection method, and aims to solve the problems of complexity and low efficiency in the vision detection process.
In order to realize the purpose, the invention adopts the technical scheme that: provided is a lens group structure for visual acuity test, comprising:
a support;
the connecting sleeve is of a hollow structure and is detachably connected to the support;
the first lens is arranged on the inner side of one end of the connecting sleeve and is a transparent part;
the adjusting sleeve is in threaded connection with the other end of the connecting sleeve, and a first limiting piece is arranged on the inner wall of the adjusting sleeve; and
the second lens is elastic and is a transparent part, one side of the second lens is abutted against the other end of the connecting sleeve, and the other side of the second lens is abutted against the first limiting piece; the first limiting piece is used for matching with the connecting sleeve to adjust the curvature of the second lens; the outer edge of the second lens is arranged at a certain distance from the inner wall of the connecting sleeve;
the first lens, the connecting sleeve and the second lens form a light transmission area; the first lens and the second lens form a lens assembly; the lens assembly adjusts diopter by means of the first limiting piece.
As another embodiment of the present application, the first limiting member is an annular structure, and the first limiting member is disposed along a circumferential direction of the second lens.
As another embodiment of the present application, the first limiting member includes:
the outer edge of the fixing part is fixed on the inner wall of the adjusting sleeve; and
the abutting part is fixedly connected with one end of the inner edge of the fixing part; the other end of the abutting part is a free end and extends towards the first lens, and the free end abuts against the second lens.
As another embodiment of the application, one end of the connecting sleeve, which is far away from the second lens, is connected with a positioning sleeve, and the positioning sleeve is in threaded connection with the inner wall of the connecting sleeve; the connecting sleeve is close to be provided with the second locating part on the inner wall of position sleeve, the second locating part be used for with the position sleeve cooperates the centre gripping jointly first lens.
As another embodiment of the present application, the first lens has a certain elasticity, and both the first lens and the second lens are convex structures protruding toward the same side; the outer edge of the first lens is arranged at a certain distance from the inner wall of the connecting sleeve; the positioning sleeve is used for matching with the second limiting piece to adjust the curvature of the first lens.
As another embodiment of the present application, an abutting point of the first limiting member and the first lens is located on an inner side of a projection of the positioning sleeve in an axis direction of the positioning sleeve; the butt joint point of the second limiting part and the second lens is positioned on the inner side of the projection of the connecting sleeve in the axis direction.
As another embodiment of the application, the outer peripheral surfaces of the positioning sleeve and the adjusting sleeve are provided with scale marks.
As another embodiment of the present application, the connection sleeve, the adjustment sleeve and the positioning sleeve are coaxially disposed; the connecting sleeve is provided with a protruding portion, the protruding portion is provided with a positioning hole, and the positioning hole is used for being fixedly connected with the support in an inserting mode.
As another embodiment of the present application, the first lens and the second lens are both provided with a through groove, and the through groove extends to the outer edge of the corresponding first lens and the second lens; the sectional area of the notch is increased progressively from the middle part to the outer edge of the corresponding first lens and the second lens.
The vision detection lens group structure has the beneficial effects that compared with the prior art, the vision detection lens group structure has the advantages that the connecting sleeve is detachably connected to the support, the connecting sleeve is of a hollow structure, the inner side of one end of the connecting sleeve is provided with the first lens, and the first lens is a transparent product. The other end of the connecting sleeve is in threaded connection with an adjusting sleeve, and a first limiting part is arranged on the inner wall of the adjusting sleeve. A second lens is arranged between the other end of the connecting sleeve and the first limiting part, and the second lens is clamped and positioned by the connecting sleeve and the first limiting part. The second lens is an elastic and transparent product. The first lens, the connecting sleeve and the second lens form a light transmitting area, the first lens and the second lens form a lens assembly, the distance between the first limiting part and the connecting sleeve can be adjusted by rotating the adjusting sleeve, and then the curvature of the clamped second lens is adjusted. The change in curvature of the second lens element changes the total power of the lens assembly. When the vision detection is carried out, a tester sequentially observes objects through the second lens and the first lens, and adjusts the diopter of the lens assembly through rotating the adjusting sleeve until the image is clear. The degree of the glasses needed to be worn by the tester can be determined through detection and calculation or through a lensmeter. This visual detection is with mirror group structure need not to try on repeatedly, once detects and can determine the most suitable degree, has improved the efficiency that detects.
Another object of the present application is to provide a vision testing method, comprising the steps of:
forming a lens assembly by the first lens and the second lens; the first lens and the second lens are both elastic and transparent pieces;
observing an object through the lens assembly, adjusting the curvature of the first lens until a clear image of the object can be obtained, and determining a first diopter of the lens assembly at the moment;
resetting the first lens, adjusting the curvature of the second lens until a clear image of the object can be obtained, and determining a second diopter of the lens assembly at the moment;
and determining the target power of the lens assembly by the first diopter and the second diopter through detection and calculation.
Compared with the prior art, the vision detection method has the beneficial effects that the first lens and the second lens form the lens assembly; the first lens and the second lens are both elastic and transparent articles. And observing an object through the lens assembly, adjusting the curvature of the first lens until a clear image of the object can be obtained, and determining the first diopter of the lens assembly at the moment. And resetting the first lens, adjusting the curvature of the second lens until a clear image of the object can be obtained, and determining the second diopter of the lens assembly at the moment. And determining the target power of the lens assembly by the first diopter and the second diopter through detection and calculation. Through twice measurement, the total diopter and the target diopter of the lens assembly can be determined through detection and calculation or through a lensmeter, and the target diopter is the diopter of the glasses which are required to be worn by a tester. The vision detection method does not need to try on repeatedly, the most suitable degree can be determined through one-time detection, and the detection efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of a vision testing lens group structure according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a vision testing lens set structure after a regulating sleeve is rotated according to an embodiment of the present invention;
fig. 3 is a schematic connection diagram of a connecting sleeve and a bracket according to an embodiment of the present invention;
FIG. 4 is a schematic connection diagram of a positioning sleeve, an adjusting sleeve and a scale mark provided by the embodiment of the invention;
FIG. 5 is a schematic structural view of a notch and a first lens according to an embodiment of the present invention;
fig. 6 is a flowchart of a vision testing method according to an embodiment of the present invention.
In the figure: 1. a support; 2. connecting sleeves; 3. an adjusting sleeve; 4. a first lens; 5. a second lens; 6. a first limit piece; 601. a fixed part; 602. an abutting portion; 7. a second limiting member; 8. a positioning sleeve; 9. a boss portion; 10. positioning holes; 11. scale marks are marked; 12. and (6) opening the groove.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, the structure of the lens assembly for vision testing of the present invention will now be described. Visual detection is with group lens structure includes: the lens comprises a bracket 1, a connecting sleeve 2, a first lens 4, an adjusting sleeve 3 and a second lens 5. The connecting sleeve 2 is of a hollow structure and is detachably connected to the support 1. The first lens 4 is arranged on the inner side of one end of the connecting sleeve 2, and the first lens 4 is a transparent part. The adjusting sleeve 3 is in threaded connection with the other end of the connecting sleeve 2, and a first limiting part 6 is arranged on the inner wall of the adjusting sleeve 3. The second lens 5 is elastic and is a transparent part, one side of the second lens 5 abuts against the other end of the connecting sleeve 2, and the other side abuts against the first limiting piece 6; the first limiting part 6 is used for matching with the connecting sleeve 2 to adjust the curvature of the second lens 5; the outer edge of the second lens 5 is arranged at a certain distance from the inner wall of the connecting sleeve 2. The first lens 4, the connecting sleeve 2 and the second lens 5 form a light transmission area; the first lens 4 and the second lens 5 form a lens assembly; the lens assembly adjusts diopter by means of the first limiting piece 6.
The vision detection lens group structure has the beneficial effects that compared with the prior art, the vision detection lens group structure has the advantages that the connecting sleeve 2 is detachably connected to the support 1, the connecting sleeve 2 is of a hollow structure, the first lens 4 is arranged on the inner side of one end of the connecting sleeve 2, and the first lens 4 is a transparent part. The other end of the connecting sleeve 2 is in threaded connection with an adjusting sleeve 3, and the inner wall of the adjusting sleeve 3 is provided with a first limiting part 6. A second lens 5 is arranged between the other end of the connecting sleeve 2 and the first limiting piece 6, and the second lens 5 is clamped and positioned by the connecting sleeve 2 and the first limiting piece 6. The second lens 5 is an elastic and transparent piece. The first lens 4, the connecting sleeve 2 and the second lens 5 form a light transmission area, the first lens 4 and the second lens 5 form a lens assembly, the distance between the first limiting part 6 and the connecting sleeve 2 can be adjusted by rotating the adjusting sleeve 3, and then the curvature of the clamped second lens 5 is adjusted. The change in curvature of the second lens element 5 changes the total power of the lens assembly. When carrying out visual acuity test, the tester loops through second lens 5 and first lens 4 and observes thing to adjust the diopter of lens subassembly through rotating adjusting collar 3, until the image is clear. The degree of the glasses needed to be worn by the tester can be determined through detection and calculation or through a lensmeter. This visual detection is with mirror group structure need not to try on repeatedly, once detects and can determine the most suitable degree, has improved the efficiency that detects.
In order to ensure that the first lens 4 and the second lens 5 can be smoothly bent, the first lens 4 and the second lens 5 are both made of resin, the resin lens is made of organic material, the inside of the resin lens is a high-molecular chain structure, the resin lens is connected to form a three-dimensional net structure, the structure among molecules is relatively loose, and spaces capable of generating relative displacement are formed among the molecular chains. The light transmittance is 84% -90%, the light transmittance is good, and the impact resistance of the optical resin lens is strong. Meanwhile, the price of the optometry instrument is expensive, and the price of the diopter detection instruments such as a lensmeter is low. The cost input that the instrument was purchased when this application reducible visual detection.
As a specific embodiment of the optical lens assembly structure for eyesight test provided by the present invention, please refer to fig. 1, the first limiting member 6 is an annular structure, and the first limiting member 6 is disposed along the circumferential direction of the second lens 5. Since the second lens 5 is an elastic and transparent member, the first position-limiting member 6 and the connecting sleeve 2 are distributed on two sides of the second lens 5. And the abutting points of the first limiting part 6 and the second lens 5 and the abutting points of the connecting sleeve 2 and the second lens 5 are arranged in a staggered manner, that is, two abutting points are distributed on different diameters of the second lens 5. Consequently, through rotating adjusting sleeve 3, can adjust the interval between adjusting sleeve 3 and the adapter sleeve 2, and then adjust the crooked radian of second lens 5, the total diopter of lens subassembly can be adjusted in the crooked radian change of second lens 5. Through setting up first locating part 6 to the loop configuration, the butt point of first locating part 6 and second lens 5 encloses and establishes to the circular shape to change the camber of second lens 5 from the circumference, avoid the not clear of the image because the crooked inhomogeneous of certain department of second lens 5 causes.
As an embodiment of the lens assembly structure for eyesight test provided by the present invention, referring to fig. 1, the first limiting member 6 includes: a fixed portion 601 and an abutting portion 602. The outer edge of the fixing part 601 is fixed on the inner wall of the adjusting sleeve 3. One end of the abutting portion 602 is fixedly connected to the inner edge of the fixing portion 601, the other end of the abutting portion 602 is a free end and extends toward the first lens 4, and the free end abuts against the second lens 5. In order to facilitate adjustment and shorten the adjustment process, the first lens 4 and the second lens 5 are both arc-shaped structures with certain bulges. The connecting sleeves 2 are abutted to the outer edge of the second lens 5, and the first limiting piece 6 is abutted to the inner edge of the second lens 5. The fixing portion 601 provided on the first limiting member 6 is disposed perpendicular to the inner wall of the adjusting sleeve 3, the inner edge of the fixing portion 601 is fixed with the abutting portion 602, and the inner side surface of the abutting portion 602 may be disposed parallel to the axis of the adjusting sleeve 3. When the adjusting sleeve 3 is rotated, the abutting portion 602 moves relative to the connecting sleeve 2, and since the second lens 5 is an elastic member, the curvature of the second lens 5 changes while the abutting portion 602 moves. The abutting portion 602 is provided, thereby facilitating the bending deformation of the second lens 5.
As a specific embodiment of the lens group structure for vision detection provided by the present invention, please refer to fig. 1, one end of the connecting sleeve 2 away from the second lens 5 is connected with a positioning sleeve 8, and the positioning sleeve 8 is in threaded connection with the inner wall of the connecting sleeve 2; the connecting sleeve 2 is far away from be provided with second locating part 7 on the inner wall of adjusting sleeve 3, second locating part 7 be used for with position sleeve 8 cooperates the centre gripping location jointly first lens 4. When the first lens 4 is installed, the first lens 4 is abutted against the second limiting part 7, and then the positioning sleeve 8 is in threaded connection with the connecting sleeve 2 until the positioning sleeve 8 is abutted against the first lens 4. The first lens 4 is stabilized inside the connecting sleeve 2 by the combined action of the locating sleeve 8 and the second limiting member 7. And through the rubber ring that is fixed with different thickness at the tip of position sleeve 8, through the butt of rubber ring and first lens 4, not only can adjust the distance between first lens 4 and the second lens 5, reduce the wearing and tearing to first lens 4 surface simultaneously.
As a specific embodiment of the lens assembly structure for vision testing provided by the present invention, please refer to fig. 1, the first lens 4 has a certain elasticity, and the first lens 4 and the second lens 5 are both convex structures protruding toward the same side; the outer edge of the first lens 4 is arranged at a certain distance from the inner wall of the connecting sleeve 2; the positioning sleeve 8 is used for matching with the second limiting part 7 to adjust the curvature of the first lens 4. In order to increase the applicability of the present application, the first lens 4 is also provided as a piece having a certain elasticity. Because myopia accounts for most of the crowd, consequently all set up first lens 4 and second lens 5 into to the convex protruding structure in same side, through adjusting the bellied angle of first lens 4 and second lens 5, can adjust the diopter of whole lens subassembly. The distance between the positioning sleeve 8 and the connecting sleeve 2 can be adjusted by rotating the positioning sleeve 8, so that the bending curvature of the first lens 4 is changed. When the curvature of the first lens 4 or the second lens 5 changes, its corresponding power also changes.
As a specific embodiment of the lens assembly structure for eyesight test provided by the present invention, please refer to fig. 1, an abutting point of the first limiting member 6 and the first lens 4 is located at an inner side of the positioning sleeve 8 projected in an axial direction thereof; the abutting point of the second limiting part 7 and the second lens 5 is located on the inner side of the projection of the connecting sleeve 2 in the axis direction. First, the abutting point of the first limiting member 6 and the first lens 4 is located on the inner side of the projection of the positioning sleeve 8 on the axis thereof, and the first limiting member 6 is fixed with a connecting portion and an extruding portion. The connecting part is fixed and arranged perpendicular to the inner wall of the connecting sleeve 2, and the extrusion part and the abutting part 602 are arranged in the same direction. When the positioning sleeve 8 rotates, the positioning sleeve 8 abuts against the outer edge of the first lens 4, and the abutting point of the second limiting member 7 is located on the inner side of the first lens 4, so that the first lens 4 is easily bent through the lever principle. And the butt point of the second limiting part 7 and the second lens 5 is located at the inner side of the projection of the connecting sleeve 2 in the axial direction, when the adjusting sleeve 3 is rotated, the connecting sleeve 2 is used as a fulcrum, and the first limiting part 6 is used as an acting point to drive the second lens 5 to bend. When the first lens 4 and the second lens 5 are both convex structures, the first limiting member 6 and the second limiting member 7 are both located at the concave side of the corresponding first lens 4 and the second lens 5, so that the first lens 4 and the second lens 5 can be bent. Meanwhile, the first lens 4 and the second lens 5 both have the tendency of being reset to be flat, so that the first lens 4 and the second lens 5 can realize the diopter change in a wider range, and the requirements of people with different degrees are met.
As a specific embodiment of the lens group structure for vision testing provided by the present invention, please refer to fig. 4, the outer peripheral surfaces of the positioning sleeve 8 and the adjusting sleeve 3 are both provided with scale marks 11. In use, the object is first viewed by the test person sequentially through the second lens 5 and the first lens 4 by rotating the adjustment sleeve 3 until a clear image of the object can be obtained. Then the detection personnel take out the connecting sleeve 2 together with the first lens 4 and the second lens 5 from the connecting sleeve 2, and the lens assembly is measured by a lensometer, so that the diopter of the lens assembly is obtained. And the influence on the detection result is avoided by rotating the adjusting sleeve 3 or the positioning sleeve 8 in the detection process. All set up scale mark 11 on the outer peripheral face of position sleeve 8 and adjusting collar 3, scale mark 11 revolves to the setting along the screw thread of position sleeve 8 and adjusting collar 3 to can annotate different colours, the record of being convenient for on the scale mark 11. After the adjustment of the tester is finished, the number of scales for screwing the positioning sleeve 8 and the adjusting sleeve 3 is recorded, so that the accuracy of the test is ensured.
In calculating the diopter, since the first lens 4 and the second lens 5 are included in the present application, the diopter difference between the first lens 4 and the second lens 5 is set to Δ θ;
wherein: s1Is the refractive index of the first lens 4; s2Is the refractive index of the second lens 5; r is1Is the radius of curvature of the first lens 4; r is2Is the radius of curvature of the second lens 5; if the first lens 4 is a plane, α is 0, and when the first lens 4 is a concave plane, α is-1; beta is-1 when the second lens 5 is concave and beta is 0 when the second lens 5 is flat.
In the present application, the refractive index s of the first lens 41And radius of curvature r2The diopter of the first lens 4 is determined by measuring in advance and recording the scale on the scale mark 11 on the positioning sleeve 8 at this time. When the second lens 5 is measured, it is first calibrated, the reference refractive index χ and the reference radius of curvature R of the second lens 5 are measured, and the scale mark 11 at that time is recordedDegree k1. The refractive index is chi when the adjusting sleeve is rotated and aligned again1And the curvature is reduced to R1Record the scale k again at this time2Most of the myopia is due to myopia, and is distributed at 200 to 600 degrees. The range of the bending angle of the second lens 5 varies little, and the change in the refractive index and the radius of curvature is regarded as a linear relationship. The slope of the linear change may be:
in this case, the variation values of the refractive index and the curvature radius when one scale is changed can be obtained
Therefore, after the detector rotates the adjusting sleeve 3, the change of the refractive index and the curvature radius of the second lens 5 at the moment can be determined according to the rotating angle of the adjusting sleeve without testing, and the reference refractive index theta and the reference curvature radius R are combined; the refractive index and the radius of curvature at that time were determined. And the diopter difference is introduced, so that the diopter of the second lens 5 can be determined, the total diopter is determined by the first lens 4 and the second lens 5, and the diopter unit is 100 degrees, so that the diopter required by the examiner can be known.
As a specific embodiment of the lens group structure for vision detection provided by the present invention, please refer to fig. 3, the connecting sleeve 2, the adjusting sleeve 3 and the positioning sleeve 8 are coaxially arranged; the connecting sleeve 2 is provided with a protruding portion 9, the protruding portion 9 is provided with a positioning hole 10, and the positioning hole 10 is used for being fixedly connected with the support 1 in an inserting mode. In order to facilitate observation and installation, the connecting sleeve 2, the adjusting sleeve 3 and the locating sleeve 8 are coaxially arranged, the diameters of the locating sleeve 8, the connecting sleeve 2 and the adjusting sleeve 3 are sequentially increased, the outer edges of the first lens 4 and the second lens 5 are both diameters, and the diameter of the second lens 5 is larger than that of the first lens 4, so that the second lens 5 can be adjusted more conveniently relative to the first lens 4. The second lens 5 is mainly adjusted during testing, and the first lens 4 can be preset. And in order to take off the connecting sleeve 2 from the support 1 smoothly for subsequent detection, symmetrical convex parts 9 are arranged on the outer edge of the connecting sleeve 2, positioning grooves are formed in the bottom surface of the convex part, plug-in components in one-to-one correspondence with the positioning grooves are fixed on the support 1, and the convex parts 9 are inserted into the corresponding plug-in components when the adjusting sleeve 3 is adjusted. After the tester finishes adjusting, the connecting sleeve 2 is taken down from the plug-in unit.
As a specific embodiment of the lens assembly structure for vision testing provided by the present invention, please refer to fig. 5, a groove 12 is formed through each of the first lens element 4 and the second lens element 5, and the groove 12 extends to the outer edge of the corresponding first lens element 4 and the corresponding second lens element 5; the sectional area of the notch 12 increases from the middle to the outer edge of the corresponding first lens 4 and the second lens 5. Because first lens 4 and second lens 5 are flexible and transparent finished piece, in order to guarantee that first lens 4 and second lens 5 can be smooth change for the angle of position sleeve 8 and adjusting collar 3, all link up on first lens 4 and second lens 5 and seted up opening groove 12, opening groove 12 can be regarded as the wedge structure that the cross-section increases progressively. The sectional area of the first lens 4 and the second lens 5 corresponding to the notch 12 is the minimum, then increases progressively to the outer edge of the first lens 4 and the second lens 5, and the notch 12 all runs through the arrangement of the first lens 4 and the second lens 5, thereby enabling the locating sleeve 8 and the adjusting sleeve 3 to be bent smoothly when moving relative to the connecting sleeve 2, and enabling a tester to obtain a clear image.
Referring to fig. 6, another objective of the present invention is to provide a vision testing method, which includes the following steps:
the first lens 4 and the second lens 5 form a lens assembly; the first lens 4 and the second lens 5 are both elastic and transparent pieces.
And observing the object through the lens assembly, and adjusting the curvature of the first lens 4 until a clear image of the object can be obtained, so as to determine the first diopter of the lens assembly at the moment.
And resetting the first lens 4, and adjusting the curvature of the second lens 5 until a clear image of the object can be obtained, and determining the second diopter of the lens assembly at the moment.
And determining the target power of the lens assembly by the first diopter and the second diopter through detection and calculation.
Compared with the prior art, the vision detection method has the beneficial effects that the first lens 4 and the second lens 5 form a lens assembly; the first lens 4 and the second lens 5 are both elastic and transparent pieces. And observing the object through the lens assembly, and adjusting the curvature of the first lens 4 until a clear image of the object can be obtained, so as to determine the first diopter of the lens assembly at the moment. And resetting the first lens 4, adjusting the curvature of the second lens 5 until a clear image of the object can be obtained, and determining the second diopter of the lens assembly at the moment. And determining the target power of the lens assembly by the first diopter and the second diopter through detection and calculation. Through twice measurement to can determine total diopter of lens subassembly and target number of degrees through detecting and calculating or through the lensmeter, the target number of degrees is the required glasses number of degrees of wearing of tester promptly, and this visual detection method need not to try on repeatedly, and the one-time detection can determine the most suitable number of degrees, has improved the efficiency that detects.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. Visual detection is with group lens structure, its characterized in that includes:
a support;
the connecting sleeve is of a hollow structure and is detachably connected to the support;
the first lens is arranged on the inner side of one end of the connecting sleeve and is a transparent part;
the adjusting sleeve is in threaded connection with the other end of the connecting sleeve, and a first limiting piece is arranged on the inner wall of the adjusting sleeve; and
the second lens is elastic and is a transparent part, one side of the second lens is abutted against the other end of the connecting sleeve, and the other side of the second lens is abutted against the first limiting piece; the first limiting piece is used for matching with the connecting sleeve to adjust the curvature of the second lens; the outer edge of the second lens is arranged at a certain distance from the inner wall of the connecting sleeve; the first lens and the second lens are both elastic parts;
the first lens, the connecting sleeve and the second lens form a light transmission area; the first lens and the second lens form a lens assembly; the lens assembly adjusts diopter by means of the first limiting piece;
one end of the connecting sleeve, which is far away from the second lens, is connected with a positioning sleeve, and the positioning sleeve is in threaded connection with the inner wall of the connecting sleeve; a second limiting piece is arranged on the inner wall of the connecting sleeve, which is close to the positioning sleeve, and the second limiting piece is used for being matched with the positioning sleeve to clamp the first lens;
the first lens has certain elasticity, and the first lens and the second lens are both convex structures which protrude towards the same side; the outer edge of the first lens is arranged at a certain distance from the inner wall of the connecting sleeve; the positioning sleeve is used for matching with the second limiting piece to adjust the curvature of the first lens;
the abutting point of the first limiting piece and the first lens is positioned on the inner side of the projection of the positioning sleeve in the axis direction; the butt joint point of the second limiting part and the second lens is positioned on the inner side of the projection of the connecting sleeve in the axis direction.
2. The optical lens assembly for eyesight test as claimed in claim 1, wherein the first limiting member is a ring-shaped member, and the first limiting member is disposed along the circumferential direction of the second lens.
3. The optical lens assembly for eyesight test as claimed in claim 1, wherein the first limiting member comprises:
the outer edge of the fixing part is fixed on the inner wall of the adjusting sleeve; and
the abutting part is fixedly connected with one end of the inner edge of the fixing part; the other end of the abutting part is a free end and extends towards the first lens, and the free end abuts against the second lens.
4. The visual acuity detecting lens array structure according to claim 1, wherein the positioning sleeve and the adjusting sleeve are provided with scale marks on the outer peripheral surfaces thereof.
5. The optical lens assembly for vision test as set forth in claim 1, wherein said connecting sleeve, said adjusting sleeve and said positioning sleeve are coaxially disposed; the connecting sleeve is provided with a protruding portion, the protruding portion is provided with a positioning hole, and the positioning hole is used for being fixedly connected with the support in an inserting mode.
6. The optical lens assembly for vision test as set forth in claim 1, wherein the first lens and the second lens each have a through groove, and the through groove extends to the outer edge of the corresponding first lens and the second lens; the sectional area of the notch is increased progressively from the middle part to the outer edge of the corresponding first lens and the second lens.
7. A vision testing method using the optical lens assembly for vision testing as set forth in any one of claims 1 to 6, comprising the steps of:
forming a lens assembly by the first lens and the second lens; the first lens and the second lens are both elastic and transparent products;
observing an object through the lens assembly, adjusting the curvature of the first lens until a clear image of the object can be obtained, and determining a first diopter of the lens assembly at the moment;
resetting the first lens, adjusting the curvature of the second lens until a clear image of the object can be obtained, and determining a second diopter of the lens assembly at the moment;
and determining the target power of the lens assembly by the first diopter and the second diopter through detection and calculation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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