CN116520564A - Virtual image distance acquisition system and method based on double-reflection type remote instrument - Google Patents
Virtual image distance acquisition system and method based on double-reflection type remote instrument Download PDFInfo
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Abstract
The invention relates to a virtual image distance acquisition system and a method based on a double-reflection type remote instrument, wherein the method comprises the following steps: firstly, obtaining the distance between an objective lens and a reading object and marking the distance as a first object distance, and obtaining the distance between an ocular lens and the objective lens and marking the distance as a second object distance; secondly, obtaining the virtual image distance of the ocular according to the first object distance and the second object distance and recording the virtual image distance as a first image distance; finally, the first image distance is displayed to a user through the display module, so that virtual image distance display of the ocular is achieved, the user can directly observe the distance in the actual use process, the use experience is further improved, and convenience is provided for parents to timely know the eye distance of the child.
Description
Technical Field
The invention relates to the technical field of myopia prevention, in particular to a virtual image distance acquisition system and method based on a double-reflection type remote instrument.
Background
The prior art does not have a good device and a good method for protecting the eyesight and preventing the myopia, so that the study of the device and the method for protecting the eyesight and preventing the myopia is important, the eyes of students are in the growth and development period, the learning amount of the students is large, the eye using time is long, the damage of the eyes of the students caused by the unhealthy eyes is large, the age of the students is small, the importance of the students on protecting the eyesight and preventing the myopia is insufficient, and the activity of the students on protecting the eyesight and preventing the myopia is lack of initiative and consciousness, so that the work for protecting the eyesight and preventing the myopia is required to be grasped from the students, and the study of the students from the students is better to grasp the habit of developing good healthy eyes, and the device and the method for protecting the eyesight and preventing the myopia are required to be well studied and popularized.
The long-term sitting posture of children is irregular in the learning process, the incidence rate of myopia is higher and higher due to unreasonable sight angles, and the special learning instrument is purchased by most parents for learning, the learning instrument generally comprises two mirrors and a bracket which are oppositely arranged front and back, wherein the ocular is a concave mirror, the objective is a convex mirror, and the distance between a book object image and the glasses of the children is further extended through the twice reflection of the two mirrors.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a virtual image distance acquisition system and a virtual image distance acquisition method based on a dual-reflection type remote instrument, which can well solve the problems.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the acquisition method of the virtual image distance acquisition system based on the double-reflection type remote instrument comprises the following steps:
the distance between the objective lens and the reading object is obtained and recorded as a first object distance, and the distance between the ocular lens and the objective lens is obtained and recorded as a second object distance;
acquiring a virtual image distance of the ocular according to the first object distance and the second object distance and recording the virtual image distance as a first image distance;
and displaying the first image distance to a user.
The method for obtaining the virtual image distance of the eyepiece according to the first object distance and the second object distance and recording the virtual image distance as a first image distance comprises the following steps of
According to the eyepiece imaging formula K1:wherein P is 1 ＝Y+Q 2 Solve for Q 1 ；
According to the objective imaging formula K2:wherein P is 2 Let X, solve Q 2 ；
Will Q 2 Substitution of K1 to solve for Q 1 Wherein, the method comprises the steps of, wherein,
wherein X and Y are both constants and respectively represent the first object distance and the second object distance, Q 1 Representing the first image distance, Q 2 Representing the image distance of the objective lens.
The invention discloses an acquisition method of a virtual image distance acquisition system based on a double-reflection type remote indicator, wherein a first measuring point is marked on an objective lens, and the linear distance between the first measuring point and a read material is the first object distance;
the first measuring point is the center point of the objective lens, and the distance between the first measuring point and the center point of the ocular lens is the second distance.
The invention relates to an acquisition method of a virtual image distance acquisition system based on a double-reflection type remote instrument, wherein X is acquired by the following method:
acquiring a first horizontal distance between the objective lens and the reading object as a first vertical edge of a right triangle, and marking the first vertical edge as G;
the first vertical distance between the objective lens and the horizontal plane of the reading object is obtained as the second vertical edge of the right triangle and is marked as H 2 ；
According to G and H 2 Obtaining X;
wherein Y is a constant and has a value ranging from 5 to 35 in cm.
The invention relates to an acquisition method of a virtual image distance acquisition system based on a double-reflection type remote instrument, wherein Y takes a value of 15 or 17.8,
when Y takes a value of 15, the ocular and the objective lens are used for watching a mobile phone or a notebook computer;
when Y takes a value of 17.8, the eyepiece and the objective lens are used to view a book.
The invention relates to an acquisition method of a virtual image distance acquisition system based on a double-reflection type remote indicator, wherein a second measuring point is marked on an ocular, the second measuring point is positioned at the lower end of the ocular, and the vertical distance between the second measuring point and the horizontal plane of a reading material is recorded as H 0 ；
When Y takes a value of 15, H 2 ＝H 0 +0.2, thenSubstituting X into K2 to solve Q 2 Will Q 2 Substitution of K1 to solve for Q 1
And pass Q through the display screen 1 Displaying to a user;
when Y takes a value of 17.8, at the moment, the upper end of the objective lens inclines forwards by 15 degrees, H 2 ＝H 0 -0.4, thenSubstituting X into K2 to solve Q 2 And Q is taken 2 Substitution of K1 to solve for Q 1 ；
And will Q 1 To display to the user.
In addition, the invention also provides a virtual image distance acquisition system based on the double-reflection type remote instrument, which comprises
The reflecting surface of the objective lens is a convex surface and is used for reflecting the object image of the reading material on the tabletop;
an eyepiece with a concave reflecting surface for reflecting a virtual image of the objective lens into human eyes;
the distance acquisition module acquires a first object distance of the objective lens according to the distance between the objective lens and the reading material, and generates first distance information corresponding to the first object distance;
the first control module calculates the first image distance according to the imaging formulas of the objective lens and the ocular lens and the first distance information;
and the display module is used for displaying the first image distance to a user.
The invention relates to a virtual image distance acquisition system based on a double-reflection type remote instrument, wherein the distance acquisition module comprises
The first distance measuring module is used for obtaining the vertical distance between the objective lens and the horizontal plane of the reading object and obtaining the horizontal distance between the objective lens and the reading object;
and the second control module acquires a first object distance of the objective lens according to the vertical distance and the horizontal distance, generates first distance information corresponding to the first object distance and sends the first distance information to the first control module.
The invention relates to a virtual image distance acquisition system based on a double-reflection type remote instrument, which further comprises
And the mobile terminal is used for a user to view the first image distance.
The invention relates to a virtual image distance acquisition system based on a double-reflection type remote instrument, which further comprises
And the second distance measuring module is used for acquiring the vertical distance between the ocular lens and the horizontal plane of the reading object.
The invention has the beneficial effects that: firstly, the distance between the objective lens and the reading object is acquired and recorded as a first object distance, secondly, the virtual image distance of the eyepiece is acquired according to the first object distance and the second object distance and recorded as a first image distance, and finally, the first image distance is displayed to a user through a display module, so that the virtual image distance of the eyepiece is displayed, further, the user can directly observe the distance in the actual use process, the use experience is further improved, convenience is provided for parents to timely know the eye distance of children, in addition, in each use, the use condition that the eye distance is adjusted only by experience in the prior art is avoided, higher consistency of the eye distance used each time is ensured, and good eye using habit of the user is further promoted.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, in which the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained by those skilled in the art without inventive effort:
fig. 1 is a flowchart of an acquisition method of a virtual image distance acquisition system based on a dual reflection type zoom-out apparatus of the present invention.
Fig. 2 is a schematic diagram of the structure and the optical path of the virtual image distance acquisition system based on the dual reflection type remote instrument of the present invention.
Fig. 3 is a schematic system structure of a virtual image distance acquisition system based on a dual reflection type remote instrument according to the present invention.
Detailed Description
The terms "first," "second," "third," and "fourth" and the like in the description and in the claims and drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
"plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
Moreover, the terms "upper, lower, left, right, upper end, lower end, longitudinal" and the like that represent the orientation are all referred to with reference to the attitude position of the apparatus or device described in this scheme when in normal use.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the following description will be made in detail with reference to the technical solutions in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present invention, based on the embodiments of the present invention.
The method for acquiring the virtual image distance acquiring system based on the dual-reflection type remote instrument according to the preferred embodiment of the invention is shown in fig. 1, and comprises the following steps:
step S10: firstly, the distance between the objective lens and the reading object 100 is acquired and recorded as a first object distance, the distance between the ocular lens and the objective lens is acquired and recorded as a second object distance, wherein the objective lens is positioned at the front lower part of the ocular lens, a user is positioned at the front side of the ocular lens, and when the reading object is used, the reading object is positioned at the rear lower part of the ocular lens and enters the ocular lens through the reflection of the objective lens, and then is reflected again to enter human eyes;
step S20: secondly, obtaining a virtual image distance of the ocular lens according to the first object distance and the second object distance and recording the virtual image distance as a first image distance;
step S30: finally, the first image distance is displayed to a user through a display module;
and then realize the virtual image distance display of eyepiece, and then make the user can directly observe the distance in the in-service use, further promoted the use and experienced the sense, it is convenient to provide the parents to child's timely understanding of eye distance, moreover when using at every turn, can directly carry out real-time contrast through the numerical value that shows with the position of actual adjustment, avoided the tradition to only rely on experience to adjust the service condition of eye distance, guarantee that the eye distance of using at every turn reaches higher uniformity, further promoted the user to develop good eye habit, effectively reduced the incidence of myopia.
The step S20 specifically includes:
according to the imaging formula K1 of the eyepiece:wherein P is 1 ＝Y+Q 2 Solve for Q 1 ；
According to the imaging formula K2 of the objective lens:wherein P is 2 Let X, solve Q 2 ；
Will Q 2 Substituting formula K1 to solve Q 1 Obtaining
Wherein X and Y are constants and respectively represent a first object distance and a second object distance, Q 1 Represents a first image distance, Q 2 Representing the image distance of the objective lens, f 1 And f 2 Respectively representing the focal lengths of the ocular lens and the objective lens, it can be seen that only f needs to be known 1 、f 2 The values of X and Y can be indirectly known as Q 1 In practice, f 1 And f 2 The value of the lens is the self-carried parameter of the ocular lens and the objective lens, the self-carried parameter is a known value, the distance Y between the objective lens and the objective lens of the learning instrument is fixed and is also a known value in the using state, and the only unknown number is X, at the moment, X can be directly measured by a user or can be directly measured by a distance measuring sensor, and the relationship is thatAll parameters of the eyepiece are known, and then the virtual image distance value Q of the eyepiece can be calculated 1 And then can be displayed to the user, and the user can display Q according to the displayed 1 The numerical value is used for reference adjustment of the position of the learning instrument or the sitting posture of the learning instrument, and the like, so that the condition that the adjustment result is not ideal due to the adjustment of the learning instrument according to the experience of a user is avoided.
Further, a first measuring point A1 is marked on the objective lens, the linear distance between the first measuring point A1 and the reading material is a first object distance, wherein the first measuring point A1 is the center point of the objective lens, the distance between the first measuring point A1 and the center point of the eyepiece is a second object distance, and the fluctuation of data caused by the fact that the positions of the two measuring points of the measuring distance are different in a large range is avoided, and finally the Q is influenced 1 To ensure the accuracy of the final result.
Preferably, when the learning apparatus is used, the objective lens is located above the tabletop 200 (i.e. the horizontal plane located) where the reading object is located below and behind the objective lens, as shown in fig. 2, so that the reading object and the objective lens are located at two ends of the hypotenuse of a right triangle, and therefore, the size of X can be known only by calculating two right-angle sides of the right triangle, and at this time, the two right-angle sides of the triangle can be obtained through manual measurement or can be obtained through direct detection by the sensor, and therefore, X can be obtained specifically by the following method:
acquiring a first horizontal distance between a first measuring point A1 on the objective lens and a reading material as a first vertical edge of a right triangle, and marking as G;
acquiring a first vertical distance between a first measuring point A1 of the objective lens and a horizontal plane of a reading object as a right angle IIIA second vertical edge of angular shape, and denoted as H 2 ；
And then according to G and H 2 X is found according to Pythagorean theorem, and Q can be obtained 1 Is a value of (2).
Preferably, Y is a constant and has a value in the range of 5 to 35 in cm.
In practice, Y may take a value of 15 or 17.8;
when Y takes a value of 15, the ocular and the objective lens are suitable for watching a mobile phone or a notebook computer;
when Y takes a value of 17.8, the eyepiece and objective lens are suitable for viewing a book.
Further, to reduce the number of measurement positions resulting in measurement error pair Q 1 The influence of the final value marks a second measuring point A2 on the ocular, the second measuring point A2 is positioned at the lower end of the ocular, and the vertical distance between the second measuring point A2 and the horizontal plane of the reading object is recorded as H 0 Taking H0 as a reference and adding an error correction value to replace H2;
when Y takes a value of 15, namely, when a user watches electronic equipment such as a mobile phone or a notebook computer, H is 2 ＝H 0 +0.2, according to the Pythagorean theorem,substituting X into K2 to solve Q 2 Further let Q 2 Substitution of K1 to solve for Q 1 ；
And pass Q through the display screen 1 Displaying to a user;
when Y takes a value of 17.8, the upper end of the objective lens is inclined forwards by 15 degrees at the moment, H 2 ＝H 0 -0.4, thenSubstituting X into K2 to solve Q 2 And Q is taken 2 Substitution of K1 to solve for Q 1 ；
And will Q 1 To display to the user.
The virtual image distance acquisition system based on the dual-reflection type zoom-out device according to the preferred embodiment of the present invention is used for implementing the above-mentioned acquisition method, as shown in fig. 2 and 3, and the system includes:
the reflecting surface of the objective lens 1 is a convex surface and is used for reflecting the object image of the reading material on the tabletop, wherein the focal length of the objective lens is half of the radius of the spherical surface where the reflecting surface is positioned;
an eyepiece 2, the reflection surface of which is a concave surface, for reflecting a virtual image of the objective lens into the human eye, wherein the focal length of the eyepiece is half of the radius of the spherical surface where the reflection surface is located;
the distance acquisition module 3 acquires a first object distance of the objective lens according to the distance between the objective lens and the reading material and generates first distance information corresponding to the first object distance;
a first control module 7 for calculating a value of a first image distance according to an imaging formula of the objective lens and the eyepiece and the first distance information;
a display module 4 for displaying the first image distance Q 1 To display to the user.
Preferably, the distance acquisition module 3 includes:
the first ranging module 31 is arranged at a first measuring point A1 on the objective lens, and is used for obtaining the vertical distance between the objective lens and the horizontal plane of the reading object and the horizontal distance between the objective lens and the reading object;
the second control module 32 obtains the first object distance of the objective lens according to the vertical distance and the horizontal distance, and generates first distance information corresponding to the first object distance and sends the first distance information to the first control module.
Preferably, the system further comprises:
the mobile terminal 5, in particular, an electronic device such as a mobile phone or a tablet computer, is loaded with a corresponding app for a user to view the first image distance, or is convenient for the user to input the value of X or Y to the second control module, so that the configuration of the first ranging module can be reduced.
Preferably, the system further comprises:
and the second distance measuring module 6 is arranged at the position of a second measuring point A2 on the ocular lens and used for acquiring the vertical distance between the ocular lens and the horizontal plane of the reading object.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (10)
1. The acquisition method of the virtual image distance acquisition system based on the double-reflection type remote instrument is characterized by comprising the following steps of:
the distance between the objective lens and the reading object is obtained and recorded as a first object distance, and the distance between the ocular lens and the objective lens is obtained and recorded as a second object distance;
acquiring a virtual image distance of the ocular according to the first object distance and the second object distance and recording the virtual image distance as a first image distance;
and displaying the first image distance to a user.
2. An acquisition method of a virtual image distance acquisition system based on a dual reflection zoom apparatus according to claim 1, wherein the acquiring the virtual image distance of the eyepiece from the first object distance and the second object distance and noting the virtual image distance as the first image distance includes
According to the eyepiece imaging formula K1:wherein P is 1 ＝Y+Q 2 Solve for Q 1 ；
According to the objective imaging formula K2:wherein P is 2 Let X, solve Q 2 ；
Will Q 2 Substitution of K1 to solve for Q 1 Wherein, the method comprises the steps of, wherein,
wherein X and Y are both constants and respectively represent the first object distance and the second object distance, Q 1 Representing the first image distance, Q 2 Representing the image distance of the objective lens, f 1 And f 2 Representing the focal lengths of the eyepiece and the objective lens, respectively.
3. The method for obtaining a virtual image distance obtaining system based on a dual-reflection zoom-out apparatus as recited in claim 2, wherein a first measurement point is marked on the objective lens, and a linear distance between the first measurement point and the reading material is the first object distance;
the first measuring point is the center point of the objective lens, and the distance between the first measuring point and the center point of the ocular lens is the second distance.
4. A method for acquiring a virtual image distance acquiring system based on a dual reflection zoom out apparatus according to claim 3, wherein X is acquired by:
acquiring a first horizontal distance between the objective lens and the reading object as a first vertical edge of a right triangle, and marking the first vertical edge as G;
the first vertical distance between the objective lens and the horizontal plane of the reading object is obtained as the second vertical edge of the right triangle and is marked as H 2 ；
According to G and H 2 Obtaining X;
wherein Y is a constant and has a value ranging from 5 to 35 in cm.
5. A virtual image distance acquisition system based on a dual reflection zoom-out apparatus according to claim 4, wherein Y takes on a value of 15 or 17.8,
when Y takes a value of 15, the ocular and the objective lens are used for watching a mobile phone or a notebook computer;
when Y takes a value of 17.8, the eyepiece and the objective lens are used to view a book.
6. An acquisition method of a virtual image distance acquisition system based on a dual-reflection zoom-out apparatus as recited in claim 5, wherein a second measurement point is marked on the eyepiece, the second measurement point is located at the lower end of the eyepiece, and a vertical distance from the second measurement point to a horizontal plane where the reading material is located is recorded as H 0 ；
When Y takes a value of 15, H 2 ＝H 0 +0.2, thenSubstituting X into K2 to solve Q 2 And Q is taken 2 Substitution of K1 to solve for Q 1 ；
And pass Q through the display screen 1 Displaying to a user;
when Y takes a value of 17.8, at the moment, the upper end of the objective lens inclines forwards by 15 degrees, H 2 ＝H 0 -0.4, thenSubstituting X into K2 to solve Q 2 And Q is taken 2 Substitution of K1 to solve for Q 1 ；
And will Q 1 To display to the user.
7. A virtual image distance acquisition system based on a dual-reflection type remote instrument is characterized by comprising
The reflecting surface of the objective lens is a convex surface and is used for reflecting the object image of the reading material on the tabletop;
an eyepiece with a concave reflecting surface for reflecting a virtual image of the objective lens into human eyes;
the distance acquisition module acquires a first object distance of the objective lens according to the distance between the objective lens and the reading material, and generates first distance information corresponding to the first object distance;
the first control module calculates the first image distance according to the imaging formulas of the objective lens and the ocular lens and the first distance information;
and the display module is used for displaying the first image distance to a user.
8. A virtual image distance acquisition system based on a dual reflection zoom-out machine as recited in claim 7, wherein the distance acquisition module comprises
The first distance measuring module is arranged at the position of the first measuring point and used for acquiring the vertical distance between the objective lens and the horizontal plane of the reading object and also used for acquiring the horizontal distance between the objective lens and the reading object;
and the second control module acquires a first object distance of the objective lens according to the vertical distance and the horizontal distance, generates first distance information corresponding to the first object distance and sends the first distance information to the first control module.
9. A virtual image distance acquisition system based on a dual reflection zoom out machine as recited in claim 7, further comprising
And the mobile terminal is used for a user to view the first image distance.
10. A virtual image distance acquisition system based on a dual reflection zoom out machine as recited in claim 7, further comprising
And the second ranging module is arranged at a second measuring point and used for acquiring the vertical distance between the ocular and the horizontal plane of the reading object.
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