CN113662505B - System for measuring myopia diopter - Google Patents
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- CN113662505B CN113662505B CN202111229945.7A CN202111229945A CN113662505B CN 113662505 B CN113662505 B CN 113662505B CN 202111229945 A CN202111229945 A CN 202111229945A CN 113662505 B CN113662505 B CN 113662505B
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/103—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/14—Arrangements specially adapted for eye photography
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Abstract
The invention relates to a measuring system of myopia diopter, which comprises a machine body, a head support, a control integration and an optometry integration, wherein a central control module is arranged in the control integration; the optometry integration is internally provided with an infrared light source, a fixed concave lens, a fixed convex lens, a movable convex lens, a projection image, a light source, a spectroscope, an imaging lens, an imaging diaphragm and an image sensor. According to the invention, an imaging image is transmitted to the central control module through the image sensor, a standard clear image is arranged in the central control module, the central control module compares the imaging image with the standard clear image, the definition value of the imaging image is judged, the moving speed of the sliding table is determined according to the definition value, the moving speed of the sliding table is faster when the definition value is lower, and the moving speed of the sliding table is gradually reduced when the definition value is gradually increased, so that the imaging speed of the clear image is accelerated while the clear fundus image is ensured to be obtained, and the time for optometry is reduced.
Description
Technical Field
The invention relates to the technical field of eye measurement, in particular to a system for measuring myopic diopter.
Background
The computer optometry unit adopts an objective measurement mode, projects an infrared image to the eye fundus of a person, generates a scattering image on the retina of the person, and objectively calculates the diopter of the eye by analyzing a measurement image acquired by CXD. When the traditional computer optometry instrument is used for measurement, an operator lightly controls the front, back, left, right, up and down movement of the instrument by hand, the pupil of the eye of a measured person is captured, the eye is aligned with the pupil of an eyeball, a measurement key is pressed, and the measurement result can be immediately displayed on a screen.
Traditional computerized optometry appearance requires extremely high to the operator, along with the development of science and technology full-automatic computerized optometry appearance replaces traditional computerized optometry appearance step by step, however current full-automatic computerized optometry appearance acquires clear measurement image speed slowly, leads to the optometry time longer.
Disclosure of Invention
Therefore, the invention provides a measuring system for myopia diopter, which is used for solving the problem of long optometry time caused by slow speed of obtaining clear measurement images by a full-automatic computerized optometry instrument in the prior art.
To achieve the above object, the present invention provides a system for measuring myopic diopter, comprising
A body;
a head rest disposed on the left side of the body;
the control integration is arranged on the right side of the machine body, a central control module is arranged in the control integration, and a display panel is arranged on the control integration;
the optometry integration is arranged above the control integration, a sliding platform is arranged below the optometry integration, a sliding track is arranged above the control integration, and the optometry integration can move above the control integration through the sliding platform;
the optometry assembly is internally provided with an infrared light source, a fixed concave lens, a fixed convex lens, a movable convex lens, a projection image, a light source, a spectroscope, an imaging lens, an imaging diaphragm and an image sensor,
a sliding table is arranged below the movable convex lens, a sliding rail positioned on the optometry integration is arranged at the bottom of the sliding table, and the sliding table is connected with the central control module;
the fixed concave lens, the fixed convex lens, the movable convex lens, the projected image and the light source are coaxially arranged from left to right in sequence;
the spectroscope is arranged between the movable convex lens and the projected image and is placed at an angle of 45 degrees;
the imaging lens is positioned right below the spectroscope, the imaging diaphragm and the image sensor are sequentially arranged below the imaging lens, and the image sensor is connected with the central control module;
the light source emits a parallel light source, the projected image is irradiated and thrown, the thrown image is imaged on the retina sequentially through the spectroscope, the movable convex lens, the fixed convex lens and the fixed concave lens, the retina is irradiated by the infrared light source, the reflected image is clearer, the reflected image sequentially passes through the fixed concave lens, the fixed convex lens and the movable convex lens, is reflected again by the spectroscope, passes through the imaging lens and the imaging optical grating, and is imaged on the image sensor finally;
the image sensor transmits an imaging image to the central control module, a standard clear image is arranged in the central control module, the central control module compares the imaging image with the standard clear image, the definition value of the imaging image is judged, and the moving speed of the sliding table is determined according to the definition value.
Further, the image sensor transmits a reflected and imaged image A1 to the central control module, a standard clear image Az is arranged in the central control module, a first color boundary B1, a second color boundary B2 and a … Nth color boundary BN exist in the standard clear image Az, and N is larger than or equal to 2;
the central control module image a1 is analyzed corresponding to the first color cut location of the standard definition image Az,
when the central module identifies the first color cut B1 'in image A1, the central module identifies the width C1 of the first color cut B1' in image A1,
when the central module does not identify the first color cut B1 'in the image A1, the central module determines that the image A1 definition cannot obtain the first color cut B1';
the central control module analyzes the corresponding positions of the second color boundary B2 to the nth color boundary BN in the image a1 according to the analysis method for the first color boundary positions described above, and the central control module counts the width of each color boundary recognizable by the image a1 and generates a color boundary width matrix C0(Ci, Cj, … Ck), where i =1,2, … N, j =2, 3 … N, and k =3, 4, … N.
Furthermore, color boundary width evaluation parameter matrixes D0 and D0 (D1, D2 and D … DN) are arranged in the central control module, wherein D1 is a width C1 evaluation parameter of the first color boundary B1 ', D2 is a width C2 evaluation parameter of the second color boundary B2 ', and DN is a width CN evaluation parameter of the nth color boundary BN ';
the central control module calculates the sharpness values E1, E1= (Di ÷ Ci + Dj ÷ Cj + … + Dk ÷ Ck) × M of the image a1, where M is the image sharpness value calculation compensation parameter.
Furthermore, a first preset image definition value calculation compensation parameter M1, a second preset image definition value calculation compensation parameter M2, a third preset image definition value calculation compensation parameter M3, and M1, M2 and M3 are arranged in the central control module;
the central control module counts the number L of the identified color boundaries and calculates the color boundary identification rate P, wherein P = L/N;
the central control module is also internally provided with a first preset color boundary recognition rate P1 and a second preset color boundary recognition rate P2, wherein P1 is less than P2;
the central control module respectively compares the color boundary recognition rate P with a first preset color boundary recognition rate P1 and a second preset color boundary recognition rate P2,
when P is less than P1, the central control module selects a first preset image definition value calculation compensation parameter M1 as an image definition value calculation compensation parameter M;
when P1 is not less than P < P2, the central control module selects a second preset image definition value calculation compensation parameter M2 as an image definition value calculation compensation parameter M;
and when P is larger than or equal to P2, the central control module selects a third preset image definition value calculation compensation parameter M3 as an image definition value calculation compensation parameter M.
Furthermore, a first preset definition value evaluation parameter e1, a second preset definition value evaluation parameter e2, a third preset definition value evaluation parameter e3, a first preset slide moving speed V1, a second preset slide moving speed V2 and a third preset slide moving speed V3 are also arranged in the central control module, wherein e1 is greater than e2 is less than e3, V1 is greater than V2 and greater than V3,
the central control module compares the sharpness value E1 with a first preset sharpness value evaluation parameter E1, a second preset sharpness value evaluation parameter E2 and a third preset sharpness value evaluation parameter E3,
when E1 is not more than E1, the central control module judges that the definition value of the image A1 does not reach the standard, and the central control module selects V1 as the moving speed of the sliding table;
when E1 is larger than E1 and is not larger than E2, the central control module judges that the definition value of the image A1 does not reach the standard, and the central control module selects V2 as the moving speed of the sliding table;
when E2 is larger than E1 and is not larger than E3, the central control module judges that the definition value of the image A1 does not reach the standard, and the central control module selects V3 as the moving speed of the sliding table;
when E1 > E3, the central control module judges that the definition value of the image A1 reaches the standard, and the central control module does not move the sliding table.
Further, when the central control module selects Vp as the moving speed of the sliding table, p =1,2,3, the central control module controls the sliding table to move leftward at the speed Vp, the image sensor acquires a new reflected image a2 in real time during the moving process, and the central control module calculates a definition value E2 of the image a2 by a method of calculating a definition value E1 of the image a 1;
the central control module compares the sharpness value E2 with the sharpness value E1,
when E2 is larger than E1, the central control module judges that the image is gradually clear and the moving direction is correct;
when E2 is less than E1, the central control module judges that the image is gradually blurred and the moving direction is wrong, controls the sliding table to move in the reverse direction at the speed Vp, and recalculates the sharpness value E2.
Further, when the central control module determines that the moving direction is correct, the central control module compares the definition value E2 with the first preset definition value evaluation parameter E1, the second preset definition value evaluation parameter E2 and the third preset definition value evaluation parameter E3 to adjust the moving speed of the sliding table.
Further, when p =1, the central control module compares the sharpness value E2 with a first preset sharpness value evaluation parameter E1,
when E2 is larger than E1, the central control module adjusts the moving speed of the sliding table to be V2;
when E1 is not less than E2, the central control module continues to control the sliding table to move at the speed V1 until E2 is not less than E1.
Further, when p =2, the central control module compares the sharpness value E2 with a second preset sharpness value evaluation parameter E2,
when E2 is larger than E2, the central control module adjusts the moving speed of the sliding table to be V3;
when E2 is not less than E2, the central control module continues to control the sliding table to move at the speed V2 until E2 is not less than E2.
Further, when p =3, the central control module compares the sharpness value E2 with a third preset sharpness value evaluation parameter E3,
when E2 is larger than E3, the central control module judges that the definition value of the image A2 reaches the standard, and the central control module controls the sliding table to stop moving;
when E3 is not less than E2, the central control module continues to control the sliding table to move at the speed V3 until E2 is not less than E3.
Compared with the prior art, the optical inspection device has the advantages that the imaging image is transmitted to the central control module by the image sensor, the standard clear image is arranged in the central control module, the imaging image is compared with the standard clear image by the central control module, the definition value of the imaging image is judged, the moving speed of the sliding table is determined according to the definition value, the moving speed of the sliding table is higher when the definition value is lower, the moving speed of the sliding table is gradually reduced when the definition value is gradually increased, the imaging speed of the clear image is accelerated while the clear fundus image is ensured to be acquired, and the optical inspection time is shortened.
In particular, the center control module image a1 is analyzed corresponding to the first color break position of the standard definition image Az, when the center control module identifies a first color break B1 'in the image a1, the center control module identifies the width C1 of the first color break B1' in the image a1, and when the center control module does not identify the first color break B1 'in the image a1, the center control module determines that the definition of the image a1 cannot obtain the first color break B1'; the central control module analyzes corresponding positions of a second color boundary B2 to an N color boundary BN in the image A1 according to the analysis method of the first color boundary position, counts the width of each color boundary which can be identified by the image A1 and generates a color boundary width matrix C0, the central control module calculates a definition value E1 of the image A1 according to the color boundary width matrix C0 and the color boundary width evaluation parameter matrix D0, identifies the color boundaries and the widths thereof and integrates, determines the acquired image definition values according to the widths of all the color boundaries, accurately determines the range of the definition values, quickly acquires the definition values of the images and reduces the time for optometry of the full-automatic computer optometry.
Furthermore, a first preset image definition value calculation compensation parameter M1, a second preset image definition value calculation compensation parameter M2, a third preset image definition value calculation compensation parameter M3, and M1, M2 and M3 are arranged in the central control module; the central control module counts the number L of the identified color boundaries and calculates a color boundary identification rate P, the central control module respectively compares the color boundary identification rate P with a first preset color boundary identification rate P1 and a second preset color boundary identification rate P2, an image definition value calculation compensation parameter value is selected, when the number of the identifiable color boundaries is more, the obtained image is clearer, and a larger value is selected as the image definition value calculation compensation parameter; when the recognizable color boundary is less, the acquired image is more fuzzy, a smaller value is selected as an image definition value calculation compensation parameter, and the image definition value calculation compensation parameter matched with the image is acquired by calculating the color boundary recognition rate P, so that the image definition calculation is more accurate, the image definition value is rapidly acquired, and the time for optometry of the full-automatic computerized optometry instrument is shortened.
Particularly, a first preset definition value evaluation parameter E1, a second preset definition value evaluation parameter E2, a third preset definition value evaluation parameter E3, a first preset slipway moving speed V1, a second preset slipway moving speed V2 and a third preset slipway moving speed V3 are further arranged in the central control module, wherein E1 is more than E2 and less than E3, and V1 is more than V2 and more than V3, the central control module compares the definition value E1 with the first preset definition value evaluation parameter E1, the second preset definition value evaluation parameter E2 and the third preset definition value evaluation parameter E3, selects the moving speed of the slipway according to the definition value, when the definition value is smaller, the sliding speed is higher, the sliding speed is guaranteed to be fast moving when the definition is lower, the definition is fast improved, when the definition value is higher, the sliding speed is lower, the sliding speed is prevented from being reversely moved due to excessive movement, through the moving speed who adjusts the slip table, acquire clear image fast, promote optometry speed, reduce optometry time.
Further, when the center control module selects Vp as the moving speed of the sliding table, the center control module controls the sliding table to move leftwards at the speed Vp, the image sensor acquires a new reflection image A2 in real time in the moving process, the center control module calculates a definition value E2 of an image A2 according to a method for calculating a definition value E1 of an image A1, the center control module compares the definition value E2 with the definition value E1 to acquire the definition value in real time, and compares and judges the definition, so that the error of the moving direction is prevented, and the time length for optometry is reduced.
Particularly, when the central control module judges that the moving direction is correct, the central control module compares the definition value E2 with a first preset definition value evaluation parameter E1, a second preset definition value evaluation parameter E2 and a third preset definition value evaluation parameter E3 to adjust the moving speed of the sliding table, monitors the definition in real time and compares the definition with the evaluation parameters in real time, adjusts the moving speed according to the definition change, gradually reduces the speed of the sliding table when the definition value upwards reaches a certain standard, prevents the sliding table from moving excessively to cause reverse movement while ensuring that the clear image is rapidly obtained, rapidly obtains the clear image by adjusting the moving speed of the sliding table, improves the light testing rate and reduces the light testing time.
Drawings
FIG. 1 is a schematic diagram of a system for measuring near vision diopter according to the present invention;
fig. 2 is a schematic structural diagram of the optometry integration according to the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a system for measuring myopic diopter according to the present invention; fig. 2 is a schematic structural diagram of the optometry integration according to the present invention.
The invention provides a system for measuring myopic diopter, which comprises
A machine body 1;
a head rest 2 provided on the left side of the machine body 1;
the control assembly 3 is arranged on the right side of the machine body 1, a central control module is arranged in the control assembly 3, and a display panel 31 is arranged on the control assembly 3;
the optometry integration 4 is arranged above the control integration 3, a sliding platform 5 is arranged below the optometry integration 4, a sliding track 6 is arranged above the control integration 3, and the optometry integration 4 can move above the control integration 3 through the sliding platform 5;
the optometry integration 4 is internally provided with an infrared light source 401, a fixed concave lens 402, a fixed convex lens 403, a movable convex lens 404, a projection image 405, a light source 406, a spectroscope 407, an imaging lens 408, an imaging diaphragm 409 and an image sensor 410, wherein,
a sliding table 411 is arranged below the movable convex lens 404, a sliding rail 412 positioned on the optometry assembly 4 is arranged at the bottom of the sliding table 411, and the sliding table 411 is connected with the central control module;
the fixed concave lens 402, the fixed convex lens 403, the movable convex lens 404, the projected image 405 and the light source 406 are coaxially arranged from left to right in sequence;
the beam splitter 407 is arranged between the convex lens 404 and the projection image 405, and is placed at an angle of 45 °;
the imaging lens 408 is positioned right below the spectroscope 407, the imaging diaphragm 409 and the image sensor 410 are sequentially arranged below the imaging lens 408, and the image sensor 410 is connected with the central control module;
the light source 406 emits a parallel light source 406, the projected image 405 is irradiated and projected, the projected image sequentially passes through the beam splitter 407, the movable convex lens 404, the fixed convex lens 403 and the fixed concave lens 402, and finally is imaged on the retina, the infrared light source 401 irradiates the retina, so that the reflected image is clearer, the reflected image sequentially passes through the fixed concave lens 402, the fixed convex lens 403 and the movable convex lens 404, and is reflected again by the beam splitter 407, and finally is imaged on the image sensor 410 through the imaging lens 408 and the imaging optical grating 409.
Specifically, the image sensor 410 transmits a reflection-imaged image a1 to the central control module, a standard clear image Az is disposed in the central control module, the standard clear image Az stores a first color cut B1, a second color cut B2, a … nth color cut BN, N is greater than or equal to 2;
the central control module image a1 is analyzed corresponding to the first color cut location of the standard definition image Az,
when the central module identifies the first color cut B1 'in image A1, the central module identifies the width C1 of the first color cut B1' in image A1,
when the central module does not identify the first color cut B1 'in the image A1, the central module determines that the image A1 sharpness fails to obtain the first color cut B1'.
Specifically, the central control module analyzes the corresponding positions of the second color boundary B2 to the nth color boundary BN in the image a1 according to the analysis method for the first color boundary positions described above, and the central control module counts the width of each color boundary recognizable by the image a1 and generates a color boundary width matrix C0(Ci, Cj, … Ck), where i =1,2, … N, j =2, 3 … N, k =3, 4, … N,
a color boundary width evaluation parameter matrix D0 and D0 (D1, D2 and D … DN) are arranged in the central control module, wherein D1 is a width C1 evaluation parameter of a first color boundary B1 ', D2 is a width C2 evaluation parameter of a second color boundary B2 ', and DN is a width CN evaluation parameter of an Nth color boundary BN ';
the central control module calculates the sharpness values E1, E1= (Di ÷ Ci + Dj ÷ Cj + … + Dk ÷ Ck) × M of the image a1, where M is the image sharpness value calculation compensation parameter.
Through discernment color boundary and its width to integrate, confirm the image definition value of gathering through the width of all color boundaries, the scope of definition value is confirmed accurately, acquires the definition value of image fast, reduces full-automatic computer optometry appearance's the used time of optometry.
Specifically, a first preset image definition value calculation compensation parameter M1, a second preset image definition value calculation compensation parameter M2, a third preset image definition value calculation compensation parameter M3, and M1, M2 and M3 are arranged in the central control module;
the central control module counts the number L of the identified color boundaries and calculates the color boundary identification rate P, wherein P = L/N;
the central control module is also internally provided with a first preset color boundary recognition rate P1 and a second preset color boundary recognition rate P2, wherein P1 is less than P2;
the central control module respectively compares the color boundary recognition rate P with a first preset color boundary recognition rate P1 and a second preset color boundary recognition rate P2,
when P is less than P1, the central control module selects a first preset image definition value calculation compensation parameter M1 as an image definition value calculation compensation parameter M;
when P1 is not less than P < P2, the central control module selects a second preset image definition value calculation compensation parameter M2 as an image definition value calculation compensation parameter M;
and when P is larger than or equal to P2, the central control module selects a third preset image definition value calculation compensation parameter M3 as an image definition value calculation compensation parameter M.
When the recognizable color boundaries are more, the acquired image is clearer, and a larger value is selected as an image definition value calculation compensation parameter; when the recognizable color boundary is less, the acquired image is more fuzzy, a smaller value is selected as an image definition value calculation compensation parameter, and the image definition value calculation compensation parameter matched with the image is acquired by calculating the color boundary recognition rate P, so that the image definition calculation is more accurate, the image definition value is rapidly acquired, and the time for optometry of the full-automatic computerized optometry instrument is shortened.
Specifically, a first preset definition value evaluation parameter e1, a second preset definition value evaluation parameter e2, a third preset definition value evaluation parameter e3, a first preset sliding table 411 moving speed V1, a second preset sliding table 411 moving speed V2 and a third preset sliding table 411 moving speed V3 are further arranged in the central control module, wherein e1 is greater than e2 is greater than e3, V1 is greater than V2 and greater than V3,
the central control module compares the sharpness value E1 with a first preset sharpness value evaluation parameter E1, a second preset sharpness value evaluation parameter E2 and a third preset sharpness value evaluation parameter E3,
when the E1 is not more than E1, the central control module judges that the definition value of the image A1 does not reach the standard, and the central control module selects V1 as the moving speed of the sliding table 411;
when E1 is larger than E1 and is not larger than E2, the central control module judges that the definition value of the image A1 does not reach the standard, and the central control module selects V2 as the moving speed of the sliding table 411;
when E2 is larger than E1 and is not larger than E3, the central control module judges that the definition value of the image A1 does not reach the standard, and the central control module selects V3 as the moving speed of the sliding table 411;
when E1 is greater than E3, the central control module determines that the definition value of the image A1 reaches the standard, and the central control module does not move the sliding table 411.
Select the functioning speed of slip table according to the definition value, when the definition value is littleer, sliding speed is big more, has ensured the definition and has moved slip table fast movement when lower, promotes the definition fast, and when the definition value is big more, sliding speed is little more, prevents that the slip table from removing and excessively leads to the reverse movement, through the functioning speed who adjusts the slip table, acquires clear image fast, promotes optometry speed, reduces optometry time.
Specifically, when the central control module selects Vp as the moving speed of the sliding table 411, p =1,2,3, the central control module controls the sliding table 411 to move leftward at the speed Vp, the image sensor 410 acquires a new reflected image a2 in real time during the moving process, and the central control module calculates a sharpness value E2 of the image a2 by a method of calculating a sharpness value E1 of the image a 1;
the central control module compares the sharpness value E2 with the sharpness value E1,
when E2 is larger than E1, the central control module judges that the image is gradually clear and the moving direction is correct;
when E2 is less than E1, the central control module judges that the image is gradually blurred and the moving direction is wrong, controls the sliding table 411 to move in the reverse direction at the speed Vp, and recalculates the sharpness value E2.
The method has the advantages that the definition value is obtained in real time, the contrast judgment is carried out on the definition, the moving direction error is prevented, and the duration of optometry is shortened.
Specifically, when the central control module determines that the moving direction is correct, the central control module compares the sharpness value E2 with the first preset sharpness value evaluation parameter E1, the second preset sharpness value evaluation parameter E2, and the third preset sharpness value evaluation parameter E3 to adjust the moving speed of the sliding table 411.
Real-time supervision definition and carry out real-time contrast with the evaluation parameter, change according to the definition and adjust the translation rate, the definition value upwards reaches certain standard, gradually reduces that speed of meaning of slip table, when guaranteeing to acquire clear image fast, prevents that the slip table from removing excessively and leading to reverse movement, through the translation rate of adjusting the slip table, acquires clear image fast, promotes optometry speed, reduces optometry time.
Specifically, when p =1, the central control module compares the sharpness value E2 with a first preset sharpness value evaluation parameter E1,
when E2 is greater than E1, the central control module adjusts the moving speed of the sliding table 411 to V2;
when E1 is equal to or less than E2, the central control module continues to control the sliding table 411 to move at the speed V1 until E2 is equal to or less than E1.
Specifically, when p =2, the central control module compares the sharpness value E2 with a second preset sharpness value evaluation parameter E2,
when E2 is greater than E2, the central control module adjusts the moving speed of the sliding table 411 to V3;
when E2 is equal to or less than E2, the central control module continues to control the sliding table 411 to move at the speed V2 until E2 is equal to or less than E2.
In particular, when p =3, the central control module compares the sharpness value E2 with a third preset sharpness value evaluation parameter E3,
when E2 is larger than E3, the central control module judges that the definition value of the image A2 reaches the standard, and the central control module controls the sliding table 411 to stop moving;
when E3 is equal to or less than E2, the central control module continues to control the sliding table 411 to move at the speed V3 until E2 is equal to or less than E3.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (6)
1. A system for measuring myopic diopter, comprising
A body;
a head rest disposed on the left side of the body;
the control integration is arranged on the right side of the machine body, a central control module is arranged in the control integration, and a display panel is arranged on the control integration;
the optometry integration is arranged above the control integration, a sliding platform is arranged below the optometry integration, a sliding track is arranged above the control integration, and the optometry integration can move above the control integration through the sliding platform;
the optometry assembly is internally provided with an infrared light source, a fixed concave lens, a fixed convex lens, a movable convex lens, a projection image, a light source, a spectroscope, an imaging lens, an imaging diaphragm and an image sensor,
a sliding table is arranged below the movable convex lens, a sliding rail positioned on the optometry integration is arranged at the bottom of the sliding table, and the sliding table is connected with the central control module;
the fixed concave lens, the fixed convex lens, the movable convex lens, the projected image and the light source are coaxially arranged from left to right in sequence;
the spectroscope is arranged between the movable convex lens and the projected image and is placed at an angle of 45 degrees;
the imaging lens is positioned right below the spectroscope, the imaging diaphragm and the image sensor are sequentially arranged below the imaging lens, and the image sensor is connected with the central control module;
the light source emits a parallel light source, the projected image is irradiated and thrown, the thrown image is imaged on the retina sequentially through the spectroscope, the movable convex lens, the fixed convex lens and the fixed concave lens, the retina is irradiated by the infrared light source, the reflected image is clearer, the reflected image sequentially passes through the fixed concave lens, the fixed convex lens and the movable convex lens, is reflected again by the spectroscope, passes through the imaging lens and the imaging optical grating, and is imaged on the image sensor finally;
the image sensor transmits an imaging image to the central control module, a standard clear image is arranged in the central control module, the central control module compares the imaging image with the standard clear image, the definition value of the imaging image is judged, and the moving speed of the sliding table is determined according to the definition value;
the image sensor transmits a reflected and imaged image A1 to the central control module, a standard clear image Az is arranged in the central control module, a first color boundary B1, a second color boundary B2 and a … nth color boundary BN are stored in the standard clear image Az, and N is larger than or equal to 2;
the central control module image a1 is analyzed corresponding to the first color cut location of the standard definition image Az,
when the central module identifies the first color cut B1 'in image A1, the central module identifies the width C1 of the first color cut B1' in image A1,
when the central module does not identify the first color cut B1 'in the image A1, the central module determines that the image A1 definition cannot obtain the first color cut B1';
the central control module analyzes the corresponding positions of the second color boundary B2 to the nth color boundary BN in the image a1 according to the analysis method for the first color boundary position, and the central control module counts the width of each color boundary recognizable by the image a1 and generates a color boundary width matrix C0(Ci, Cj, … Ck), wherein i =1,2, … N, j =2, 3 … N, and k =3, 4, … N;
a color boundary width evaluation parameter matrix D0 and D0 (D1, D2 and D … DN) are arranged in the central control module, wherein D1 is a width C1 evaluation parameter of a first color boundary B1 ', D2 is a width C2 evaluation parameter of a second color boundary B2 ', and DN is a width CN evaluation parameter of an Nth color boundary BN ';
the central control module calculates a definition value E1, E1= (Di/Ci + Dj/Cj + … + Dk/Ck) xM of the image A1, wherein M is an image definition value calculation compensation parameter;
a first preset image definition value calculation compensation parameter M1, a second preset image definition value calculation compensation parameter M2 and a third preset image definition value calculation compensation parameter M3 are arranged in the central control module, and M1 is larger than M2 and M3;
the central control module counts the number L of the identified color boundaries and calculates the color boundary identification rate P, wherein P = L/N;
the central control module is also internally provided with a first preset color boundary recognition rate P1 and a second preset color boundary recognition rate P2, wherein P1 is less than P2;
the central control module respectively compares the color boundary recognition rate P with a first preset color boundary recognition rate P1 and a second preset color boundary recognition rate P2,
when P is less than P1, the central control module selects a first preset image definition value calculation compensation parameter M1 as an image definition value calculation compensation parameter M;
when P1 is not less than P < P2, the central control module selects a second preset image definition value calculation compensation parameter M2 as an image definition value calculation compensation parameter M;
when P is larger than or equal to P2, the central control module selects a third preset image definition value calculation compensation parameter M3 as an image definition value calculation compensation parameter M;
the central control module is also internally provided with a first preset definition value evaluation parameter e1, a second preset definition value evaluation parameter e2, a third preset definition value evaluation parameter e3, a first preset sliding table moving speed V1, a second preset sliding table moving speed V2 and a third preset sliding table moving speed V3, wherein e1 is more than e2 and less than e3, V1 is more than V2 and more than V3,
the central control module compares the sharpness value E1 with a first preset sharpness value evaluation parameter E1, a second preset sharpness value evaluation parameter E2 and a third preset sharpness value evaluation parameter E3,
when E1 is not more than E1, the central control module judges that the definition value of the image A1 does not reach the standard, and the central control module selects V1 as the moving speed of the sliding table;
when E1 is larger than E1 and is not larger than E2, the central control module judges that the definition value of the image A1 does not reach the standard, and the central control module selects V2 as the moving speed of the sliding table;
when E2 is larger than E1 and is not larger than E3, the central control module judges that the definition value of the image A1 does not reach the standard, and the central control module selects V3 as the moving speed of the sliding table;
when E1 > E3, the central control module judges that the definition value of the image A1 reaches the standard, and the central control module does not move the sliding table.
2. The system for measuring myopic diopter of claim 1, wherein when Vp is selected as the moving speed of the sliding table by the central control module, p =1,2,3, the central control module controls the sliding table to move leftwards at the speed Vp, the image sensor acquires a new reflected image a2 in real time during the movement, and the central control module calculates the sharpness value E2 of the image a2 according to the method of calculating the sharpness value E1 of the image a 1;
the central control module compares the sharpness value E2 with the sharpness value E1,
when E2 is larger than E1, the central control module judges that the image is gradually clear and the moving direction is correct;
when E2 is less than E1, the central control module judges that the image is gradually blurred and the moving direction is wrong, controls the sliding table to move in the reverse direction at the speed Vp, and recalculates the sharpness value E2.
3. The system of claim 2, wherein when the central control module determines that the moving direction is correct, the central control module compares the sharpness value E2 with the first, second, and third preset sharpness value evaluation parameters E1, E2, and E3 to adjust the moving speed of the slide.
4. A system for measuring near vision diopter according to claim 3, wherein said central control module compares the sharpness value E2 with a first preset sharpness value evaluation parameter E1 when p =1,
when E2 is larger than E1, the central control module adjusts the moving speed of the sliding table to be V2;
when E1 is not less than E2, the central control module continues to control the sliding table to move at the speed V1 until E2 is not less than E1.
5. A system for measuring near vision diopter according to claim 4, wherein when p =2, said central control module compares the sharpness value E2 with a second preset sharpness value evaluation parameter E2,
when E2 is larger than E2, the central control module adjusts the moving speed of the sliding table to be V3;
when E2 is not less than E2, the central control module continues to control the sliding table to move at the speed V2 until E2 is not less than E2.
6. A system for measuring near vision diopter according to claim 5, wherein when p =3, said central control module compares the sharpness value E2 with a third preset sharpness value evaluation parameter E3,
when E2 is larger than E3, the central control module judges that the definition value of the image A2 reaches the standard, and the central control module controls the sliding table to stop moving;
when E3 is not less than E2, the central control module continues to control the sliding table to move at the speed V3 until E2 is not less than E3.
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