CN110346364A - A kind of vertometer and its measurement method to eyeglass torsion resistance - Google Patents
A kind of vertometer and its measurement method to eyeglass torsion resistance Download PDFInfo
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- CN110346364A CN110346364A CN201910667710.2A CN201910667710A CN110346364A CN 110346364 A CN110346364 A CN 110346364A CN 201910667710 A CN201910667710 A CN 201910667710A CN 110346364 A CN110346364 A CN 110346364A
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Abstract
The present invention provides a kind of vertometer and its to the measurement method of eyeglass torsion resistance, it include: the light spot image for obtaining eyeglass, divide light spot image into N*N matrix dot, and the vertex lens power that N*N matrix dot is calculated in vertex lens power is carried out to each matrix dot respectively, the vertex lens power of N*N matrix dot is averaged later to obtain standard vertex lens power, the vertex lens power of N*N matrix dot is compared with standard vertex lens power, obtain the vertex lens power difference of N*N matrix dot, then the vertex lens power difference of N*N matrix dot is compared with standard of tolerance, obtain the standard deviation of N*N matrix dot, M matrix dot for being distributed in center of lens surrounding is subsequently chosen from N*N matrix dot, and weighted differences operation is carried out to the standard deviation of M matrix dot, obtain the torsion resistance of eyeglass, so as to eyeglass The degree of wear is judged, and then can be used whether the more intuitive eyeglass for clearly learning oneself in family has already appeared abrasion and the degree of wear.
Description
Technical field
The present invention relates to technical optics fields of measurement, more specifically to a kind of vertometer and its to eyeglass torsion resistance
Measurement method.
Background technique
Vertometer is that light beam shot from the light source is carried out light projector to detected eyeglass, using optical detection device to transmission
The light quantity distribution for being detected the light of eyeglass is detected, and the instrument for detecting the refracting characteristic of eyeglass is measured according to its testing result
Device.
Vertometer carries out measuring fixed amount, still, traditional vertometer as with various parameters of the mirror metrical instrument to eyeglass
Can only the parameters such as concave-sphere, cylindrical mirror, prism to eyeglass measure, there is no relevant index to carry out the degree of wear of eyeglass
Judgement identification, cause user cannot the more intuitive eyeglass for clearly learning oneself whether have already appeared abrasion and the degree of wear.
Summary of the invention
In view of this, the present invention provides a kind of vertometer and its to the measurement method of eyeglass torsion resistance, it is existing to solve
The vertometer the problem of degree of wear, that is, torsion resistance of eyeglass cannot being measured.
To achieve the above object, the invention provides the following technical scheme:
A kind of measurement method of vertometer to eyeglass torsion resistance, comprising:
The light spot image for obtaining eyeglass, divides the light spot image into N*N matrix dot, clicks through respectively to each matrix
The vertex lens power of the N*N matrix dot is calculated in row vertex lens power；
It averages the vertex lens power of the N*N matrix dot to obtain standard vertex lens power, the top of the N*N matrix dot is burnt
Degree is compared with the standard vertex lens power, obtains the vertex lens power difference of the N*N matrix dot；
The vertex lens power difference of the N*N matrix dot is compared with standard of tolerance, obtains the N*N matrix dot
Standard deviation；
M matrix dot for being distributed in the center of lens surrounding is chosen from the N*N matrix dot, and to the M square
The standard deviation of lattice point carries out weighted differences operation, obtains the distortion angle value of the eyeglass；
Wherein, M, N are the natural number greater than 1.
Optionally, the vertex lens power difference of the N*N matrix dot is compared with standard of tolerance, obtains the N*N
The standard deviation of matrix dot, comprising:
If the vertex lens power difference the standard of tolerance 2% hereinafter, if the standard deviation be equal to 0；
If the vertex lens power difference is higher than the 2% of the standard of tolerance, but is equal to the 25% of the standard of tolerance, then described
Standard deviation is equal to 1；
If the vertex lens power difference is higher than the 25% of the standard of tolerance, but less than or equal to the standard of tolerance
50%, then the standard deviation is equal to 2；
If the vertex lens power difference is higher than the 50% of the standard of tolerance, but less than or equal to the standard of tolerance
75%, then the standard deviation is equal to 3；
If the vertex lens power difference is higher than the 75% of the standard of tolerance, but less than or equal to the standard of tolerance
100%, then the standard deviation is equal to 4；
If the vertex lens power difference is higher than the 100% of the standard of tolerance, but less than or equal to the standard of tolerance
125%, then the standard deviation is equal to 5；
If the vertex lens power difference is higher than the 125% of the standard of tolerance, but less than or equal to the standard of tolerance
150%, then the standard deviation is equal to 6.
Optionally, N is equal to 9, M and is equal to 8.
Optionally, weighted differences operation is carried out to the standard deviation of 8 matrix dots, obtains the distortion angle value packet of the eyeglass
It includes:
If operation result is equal to 8, the distortion angle value is equal to 0；
If operation result is greater than 9 and less than 25, the distortion angle value is equal to 25%；
If operation result is greater than 26 and less than 30, the distortion angle value is equal to 50%；
If operation result is greater than 31 and less than 35, the distortion angle value is equal to 75%；
If operation result is greater than 36 and less than 40, the distortion angle value is equal to 100%；
If operation result is greater than 41 and less than 45, the distortion angle value is equal to 125%；
If operation result is greater than 46, the distortion angle value is equal to 150%.
A kind of vertometer, comprising:
Image acquisition unit, for obtaining the light spot image of eyeglass；
Vertex lens power computing unit respectively clicks through each matrix for dividing the light spot image into N*N matrix dot
The vertex lens power of the N*N matrix dot is calculated in row vertex lens power；
Vertex lens power difference computational unit, for averaging the vertex lens power of the N*N matrix dot to obtain standard vertex lens power,
The vertex lens power of the N*N matrix dot is compared with the standard vertex lens power, obtains the vertex lens power of the N*N matrix dot
Difference；
Standard deviation computing unit, for the vertex lens power difference of the N*N matrix dot to be compared with standard of tolerance,
Obtain the standard deviation of the N*N matrix dot；
Torsion resistance computing unit, for choosing M square for being distributed in the center of lens surrounding from the N*N matrix dot
Lattice point, and weighted differences operation is carried out to the standard deviation of the M matrix dot, obtain the torsion resistance of the eyeglass, wherein M,
N is the natural number greater than 1.
Optionally, the standard deviation computing unit by the vertex lens power difference of the N*N matrix dot and standard of tolerance into
Row compares, and obtains the standard deviation of the N*N matrix dot, comprising:
If the vertex lens power difference the standard of tolerance 2% hereinafter, if the standard deviation be equal to 0；
If the vertex lens power difference is higher than the 2% of the standard of tolerance, but is equal to the 25% of the standard of tolerance, then described
Standard deviation is equal to 1；
If the vertex lens power difference is higher than the 25% of the standard of tolerance, but less than or equal to the standard of tolerance
50%, then the standard deviation is equal to 2；
If the vertex lens power difference is higher than the 50% of the standard of tolerance, but less than or equal to the standard of tolerance
75%, then the standard deviation is equal to 3；
If the vertex lens power difference is higher than the 75% of the standard of tolerance, but less than or equal to the standard of tolerance
100%, then the standard deviation is equal to 4；
If the vertex lens power difference is higher than the 100% of the standard of tolerance, but less than or equal to the standard of tolerance
125%, then the standard deviation is equal to 5；
If the vertex lens power difference is higher than the 125% of the standard of tolerance, but less than or equal to the standard of tolerance
150%, then the standard deviation is equal to 6.
Optionally, N is equal to 9, M and is equal to 8.
Optionally, the torsion resistance computing unit carries out weighted differences operation to the standard deviation of 8 matrix dots, obtains institute
The distortion angle value for stating eyeglass includes:
If operation result is equal to 8, the distortion angle value is equal to 0；
If operation result is greater than 9 and less than 25, the distortion angle value is equal to 25%；
If operation result is greater than 26 and less than 30, the distortion angle value is equal to 50%；
If operation result is greater than 31 and less than 35, the distortion angle value is equal to 75%；
If operation result is greater than 36 and less than 40, the distortion angle value is equal to 100%；
If operation result is greater than 41 and less than 45, the distortion angle value is equal to 125%；
If operation result is greater than 46, the distortion angle value is equal to 150%.
Optionally, the vertometer includes display, and the torsion resistance computing unit is also used to control the display and exists
Torsion resistance viewing area shows the standard deviation of each matrix dot, wherein the display area of the different matrix dots of standard deviation
Number of pixels is different.
Optionally, the torsion resistance computing unit is also used to control the display and shows the torsion in torsion resistance viewing area
Curvature value.
Compared with prior art, the technical scheme provided by the invention has the following advantages:
Vertometer provided by the present invention and its measurement method to eyeglass torsion resistance, after the light spot image for obtaining eyeglass,
It divides light spot image into N*N matrix dot, and vertex lens power is carried out to each matrix dot respectively, N*N matrix dot is calculated
Vertex lens power averages the vertex lens power of N*N matrix dot to obtain standard vertex lens power later, by the vertex lens power of N*N matrix dot with
Standard vertex lens power is compared, and obtains the vertex lens power difference of N*N matrix dot, then by the vertex lens power difference of N*N matrix dot
It is compared with standard of tolerance, obtains the standard deviation of N*N matrix dot, be subsequently distributed in mirror from N*N matrix dot selection
M matrix dot of piece center surrounding, and weighted differences operation is carried out to the standard deviation of M matrix dot, obtain the distortion of eyeglass
Degree, judges, and then the more intuitive eyeglass for clearly learning oneself in family can be used so as to the degree of wear to eyeglass
Whether abrasion and the degree of wear are had already appeared.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is flow chart of the vertometer provided in an embodiment of the present invention to the measurement method of eyeglass torsion resistance；
Fig. 2 is the distribution schematic diagram of 9*9 matrix dot provided in an embodiment of the present invention；
Fig. 3 is the distribution schematic diagram of 8 matrix dots provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of vertometer provided in an embodiment of the present invention；
Fig. 5 is a kind of display interface schematic diagram of torsion resistance provided in an embodiment of the present invention；
Fig. 6 is the display interface schematic diagram of another torsion resistance provided in an embodiment of the present invention.
Specific embodiment
It is core of the invention thought above, to keep the above objects, features and advantages of the present invention more obvious easily
Understand, following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a kind of vertometers to the measurement method of eyeglass torsion resistance, as shown in Figure 1, comprising:
S101: obtaining the light spot image of eyeglass, the light spot image is divided into N*N matrix dot, respectively to each square
Lattice point carries out the vertex lens power that the N*N matrix dot is calculated in vertex lens power；
In the embodiment of the present invention, vertometer includes measurement light source, image acquisition unit, display, processing unit and storage
Device etc., after measuring source emissioning light line and being irradiated on eyeglass, image acquisition unit obtains the light after eyeglass, obtains mirror
The light spot image of piece, and light spot image is transmitted to processing unit, processing unit divides light spot image into N*N matrix dot,
As shown in Fig. 2, being divided into 9*9 matrix dot, and vertex lens power is carried out to each matrix dot respectively, N*N matrix dot is calculated
Vertex lens power.
S102: averaging the vertex lens power of the N*N matrix dot to obtain standard vertex lens power, by the N*N matrix dot
Vertex lens power be compared with the standard vertex lens power, obtain the vertex lens power difference of the N*N matrix dot；
The vertex lens power for N*N matrix dot being calculated is averaged, standard vertex lens power is obtained, by N*N matrix dot
In the vertex lens power of each matrix dot be compared with standard vertex lens power, obtain the vertex lens power difference of N*N matrix dot.Namely
It says, carries out the vertex lens power of matrix dot each in N*N matrix dot to seek difference operation with standard vertex lens power, obtain N*N matrix
The vertex lens power difference of point.
S103: the vertex lens power difference of the N*N matrix dot is compared with standard of tolerance, obtains the N*N square
The standard deviation of lattice point；
The vertex lens power difference of N*N matrix dot is compared with standard of tolerance, obtains the standard deviation of N*N matrix dot
Value.Optionally, above-mentioned standard tolerance is GB standard of tolerance, that is, international standard tolerance.
It is specifically compared by following standard and assignment:
If the vertex lens power difference the standard of tolerance 2% hereinafter, if the standard deviation be equal to 0；
If the vertex lens power difference is higher than the 2% of the standard of tolerance, but is equal to the 25% of the standard of tolerance, then described
Standard deviation is equal to 1；
If the vertex lens power difference is higher than the 25% of the standard of tolerance, but less than or equal to the standard of tolerance
50%, then the standard deviation is equal to 2；
If the vertex lens power difference is higher than the 50% of the standard of tolerance, but less than or equal to the standard of tolerance
75%, then the standard deviation is equal to 3；
If the vertex lens power difference is higher than the 75% of the standard of tolerance, but less than or equal to the standard of tolerance
100%, then the standard deviation is equal to 4；
If the vertex lens power difference is higher than the 100% of the standard of tolerance, but less than or equal to the standard of tolerance
125%, then the standard deviation is equal to 5；
If the vertex lens power difference is higher than the 125% of the standard of tolerance, but less than or equal to the standard of tolerance
150%, then the standard deviation is equal to 6.
That is, if the vertex lens power difference of matrix dot is higher than the 2% of GB standard of tolerance, but it is equal to GB standard of tolerance
25%, then standard deviation is 1, if the vertex lens power difference of matrix dot is higher than the 25% of GB standard of tolerance, but is marked less than or equal to GB
The 50% of quasi- tolerance, then standard deviation is 2, and so on.
Wherein, the standard of tolerance of different type eyeglass or the different eyeglass of vertex lens power is different, as shown in the table:
S104: M matrix dot for being distributed in the center of lens surrounding is chosen from the N*N matrix dot, and to the M
The standard deviation of a matrix dot is weighted, and obtains the torsion resistance of the eyeglass；
Wherein, M, N are the natural number greater than 1.Optionally, N is equal to 9, M equal to 8, only as example in the embodiment of the present invention
It is illustrated, it is not limited to this.
As shown in figure 3, choosing 8 matrix dots for being distributed in center of lens surrounding, i.e., overstriking in figure from 9*9 matrix dot
8 matrix dots, and the standard deviation of 8 matrix dots is weighted, optionally, torsion resistance is equal to the mark of 8 matrix dots
The sum of quasi- difference can obtain the torsion resistance of eyeglass according to operation result later:
If operation result is equal to 8, angle value is distorted equal to 0；
If operation result is greater than 9 and less than 25, angle value is distorted equal to 25%；
If operation result is greater than 26 and less than 30, angle value is distorted equal to 50%；
If operation result is greater than 31 and less than 35, angle value is distorted equal to 75%；
If operation result is greater than 36 and less than 40, angle value is distorted equal to 100%；
If operation result is greater than 41 and less than 45, angle value is distorted equal to 125%；
If operation result is greater than 46, angle value is distorted equal to 150%.
Vertometer provided by the present invention is to the measurement method of eyeglass torsion resistance, after the light spot image for obtaining eyeglass, by light
Spot picture portion carries out the top coke that N*N matrix dot is calculated in vertex lens power to each matrix dot at N*N matrix dot, and respectively
Degree, averages the vertex lens power of N*N matrix dot to obtain standard vertex lens power later, by the vertex lens power and standard of N*N matrix dot
Vertex lens power is compared, and obtains the vertex lens power difference of N*N matrix dot, then by the vertex lens power difference of N*N matrix dot and mark
Quasi- tolerance is compared, and obtains the standard deviation of N*N matrix dot, is subsequently distributed in eyeglass from N*N matrix dot selection
M matrix dot of heart surrounding, and weighted differences operation is carried out to the standard deviation of M matrix dot, the torsion resistance of eyeglass is obtained, from
And the degree of wear of eyeglass can be judged, and then the more intuitive eyeglass for clearly learning oneself in family can be used whether
Occurred wearing and the degree of wear.
The embodiment of the invention also provides a kind of vertometers, as shown in figure 4, including image acquisition unit 10, lensometer
Calculate unit 11, vertex lens power difference computational unit 12, standard deviation computing unit 13 and torsion resistance computing unit 14.
It should be noted that vertometer includes measurement light source, image acquisition unit, display, place in the embodiment of the present invention
Unit and memory etc. are managed, wherein processing unit includes vertex lens power computing unit, vertex lens power difference computational unit, standard deviation meter
Calculate unit and torsion resistance computing unit etc..
In the embodiment of the present invention, image acquisition unit 10, for obtaining the light spot image of eyeglass；
Vertex lens power computing unit 11, for dividing the light spot image into N*N matrix dot, respectively to each matrix dot
Carry out the vertex lens power that the N*N matrix dot is calculated in vertex lens power；
Vertex lens power difference computational unit 12 obtains standard top coke for averaging the vertex lens power of the N*N matrix dot
Degree, the vertex lens power of the N*N matrix dot is compared with the standard vertex lens power, obtains the top of the N*N matrix dot
Focal power difference；
Standard deviation computing unit 13, for comparing the vertex lens power difference of the N*N matrix dot with standard of tolerance
Compared with obtaining the standard deviation of the N*N matrix dot；
Torsion resistance computing unit 14, for being distributed in M of the center of lens surrounding from N*N matrix dot selection
Matrix dot, and weighted differences operation is carried out to the standard deviation of the M matrix dot, obtain the torsion resistance of the eyeglass, wherein
M, N is the natural number greater than 1.
Optionally, the standard deviation computing unit 13 is by the vertex lens power difference and standard of tolerance of the N*N matrix dot
It is compared, obtains the standard deviation of the N*N matrix dot, comprising:
If the vertex lens power difference the standard of tolerance 2% hereinafter, if the standard deviation be equal to 0；
If the vertex lens power difference is higher than the 2% of the standard of tolerance, but is equal to the 25% of the standard of tolerance, then described
Standard deviation is equal to 1；
If the vertex lens power difference is higher than the 25% of the standard of tolerance, but less than or equal to the standard of tolerance
50%, then the standard deviation is equal to 2；
If the vertex lens power difference is higher than the 50% of the standard of tolerance, but less than or equal to the standard of tolerance
75%, then the standard deviation is equal to 3；
If the vertex lens power difference is higher than the 75% of the standard of tolerance, but less than or equal to the standard of tolerance
100%, then the standard deviation is equal to 4；
If the vertex lens power difference is higher than the 100% of the standard of tolerance, but less than or equal to the standard of tolerance
125%, then the standard deviation is equal to 5；
If the vertex lens power difference is higher than the 125% of the standard of tolerance, but less than or equal to the standard of tolerance
150%, then the standard deviation is equal to 6.
Optionally, N is equal to 9, M and is equal to 8.Certainly, the present invention is not limited to this, in other embodiments, can basis
It needs to carry out value to N and M.
Optionally, the torsion resistance computing unit 14 carries out weighted differences operation to the standard deviation of 8 matrix dots, obtains
The distortion angle value of the eyeglass includes:
If operation result is equal to 8, the distortion angle value is equal to 0；
If operation result is greater than 9 and less than 25, the distortion angle value is equal to 25%；
If operation result is greater than 26 and less than 30, the distortion angle value is equal to 50%；
If operation result is greater than 31 and less than 35, the distortion angle value is equal to 75%；
If operation result is greater than 36 and less than 40, the distortion angle value is equal to 100%；
If operation result is greater than 41 and less than 45, the distortion angle value is equal to 125%；
If operation result is greater than 46, the distortion angle value is equal to 150%.
Vertometer in the embodiment of the present invention includes display, and the torsion resistance computing unit 14 is also used to control described aobvious
Show that device shows the standard deviation of each matrix dot in torsion resistance viewing area, wherein the display of the different matrix dots of standard deviation
The number of pixels in region is different.
If eyeglass is non-distorted, show the degree of all positions in measured zone be it is identical, will not occur display label
Point, the display mark point can be round or square pattern etc.；If eyeglass has distortion, show non-eyeglass centre bit in measured zone
Set it is variant with the degree of center of lens position (including diopter of correction and cylindrical mirror degree), will occur 8 display mark points, such as Fig. 5 institute
Show.
Wherein, 8 display mark point positions are not identical as the degree difference of center of lens position, then 8 display mark points
Size it is not identical, as shown in figure 5,8 display mark points ● size it is not identical；In 8 display mark point positions and eyeglass
The degree difference of heart position is identical, then the size of 8 display mark points is identical.
Each display mark point has 7 kinds of different sizes to show, the degree to indicate the position and center of lens position is poor
Off course degree.The size of difference display mark point and the corresponding relationship of standard deviation A are as follows:
If A is equal to 0, show that the size of mark point is 1 pixel；
If A is equal to 1, show that the size of mark point is 4 pixels；
If A is equal to 2, show that the size of mark point is 8 pixels；
If A is equal to 3, show that the size of mark point is 12 pixels；
If A is equal to 4, show that the size of mark point is 16 pixels；
If A is equal to 5, show that the size of mark point is 20 pixels；
If A is equal to 6, show that the size of mark point is 24 pixels.
Still optionally further, torsion resistance computing unit 14 is also used to control the display and shows institute in torsion resistance viewing area
State distortion angle value, so as to user can the more intuitive eyeglass for clearly learning oneself whether have already appeared abrasion and abrasion journey
Degree.
In the embodiment of the present invention, distortion angle value, such as 25%, 50% can be shown in the form of percentage, can also be made
Torsion resistance is identified with region area, as shown in fig. 6, as unit of radius of circle (100% torsion resistance), equally distributed 8 in region
The ratio of area of a polygon composed by coordinate of the torsion resistance of a point in unit circle and unit circle is in present viewing field
Distort degree.Certainly, the present invention is not limited to this, in other embodiments, can also show torsion resistance using other modes.
Vertometer provided by the present invention after the light spot image for obtaining eyeglass, divides light spot image into N*N matrix
Point, and the vertex lens power that N*N matrix dot is calculated in vertex lens power is carried out to each matrix dot respectively, later by N*N matrix dot
Vertex lens power average to obtain standard vertex lens power, the vertex lens power of N*N matrix dot is compared with standard vertex lens power, obtains N*
Then the vertex lens power difference of N*N matrix dot is compared with standard of tolerance, obtains N*N by the vertex lens power difference of N number of matrix dot
The standard deviation of a matrix dot subsequently chooses M matrix dot for being distributed in center of lens surrounding from N*N matrix dot, and to M
The standard deviation of a matrix dot carries out weighted differences operation, the torsion resistance of eyeglass is obtained, so as to the degree of wear to eyeglass
Judged, and then can be used whether the more intuitive eyeglass for clearly learning oneself in family has already appeared abrasion and abrasion journey
Degree.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of vertometer is to the measurement method of eyeglass torsion resistance characterized by comprising
The light spot image for obtaining eyeglass, divides the light spot image into N*N matrix dot, pushes up respectively to each matrix dot
The vertex lens power of the N*N matrix dot is calculated in focal power；
Average the vertex lens power of the N*N matrix dot to obtain standard vertex lens power, by the vertex lens power of the N*N matrix dot with
The standard vertex lens power is compared, and obtains the vertex lens power difference of the N*N matrix dot；
The vertex lens power difference of the N*N matrix dot is compared with standard of tolerance, obtains the standard of the N*N matrix dot
Difference；
M matrix dot for being distributed in the center of lens surrounding is chosen from the N*N matrix dot, and to the M matrix dot
Standard deviation carry out weighted differences operation, obtain the distortion angle value of the eyeglass；
Wherein, M, N are the natural number greater than 1.
2. the method according to claim 1, wherein by the vertex lens power difference and standard of the N*N matrix dot
Tolerance is compared, and obtains the standard deviation of the N*N matrix dot, comprising:
If the vertex lens power difference the standard of tolerance 2% hereinafter, if the standard deviation be equal to 0；
If the vertex lens power difference is higher than the 2% of the standard of tolerance, but is equal to the 25% of the standard of tolerance, then the standard
Difference is equal to 1；
If the vertex lens power difference is higher than the 25% of the standard of tolerance, but is less than or equal to the 50% of the standard of tolerance, then
The standard deviation is equal to 2；
If the vertex lens power difference is higher than the 50% of the standard of tolerance, but is less than or equal to the 75% of the standard of tolerance, then
The standard deviation is equal to 3；
If the vertex lens power difference is higher than the 75% of the standard of tolerance, but is less than or equal to the 100% of the standard of tolerance, then
The standard deviation is equal to 4；
If the vertex lens power difference is higher than the 100% of the standard of tolerance, but is less than or equal to the 125% of the standard of tolerance,
Then the standard deviation is equal to 5；
If the vertex lens power difference is higher than the 125% of the standard of tolerance, but is less than or equal to the 150% of the standard of tolerance,
Then the standard deviation is equal to 6.
3. method according to claim 1 or 2, which is characterized in that N is equal to 9, M and is equal to 8.
4. according to the method described in claim 3, it is characterized in that, the standard deviation to 8 matrix dots carries out weighted differences fortune
It calculates, the distortion angle value for obtaining the eyeglass includes:
If operation result is equal to 8, the distortion angle value is equal to 0；
If operation result is greater than 9 and less than 25, the distortion angle value is equal to 25%；
If operation result is greater than 26 and less than 30, the distortion angle value is equal to 50%；
If operation result is greater than 31 and less than 35, the distortion angle value is equal to 75%；
If operation result is greater than 36 and less than 40, the distortion angle value is equal to 100%；
If operation result is greater than 41 and less than 45, the distortion angle value is equal to 125%；
If operation result is greater than 46, the distortion angle value is equal to 150%.
5. a kind of vertometer characterized by comprising
Image acquisition unit, for obtaining the light spot image of eyeglass；
Vertex lens power computing unit respectively pushes up each matrix dot for dividing the light spot image into N*N matrix dot
The vertex lens power of the N*N matrix dot is calculated in focal power；
Vertex lens power difference computational unit, for averaging the vertex lens power of the N*N matrix dot to obtain standard vertex lens power, by institute
The vertex lens power for stating N*N matrix dot is compared with the standard vertex lens power, and the vertex lens power for obtaining the N*N matrix dot is poor
Value；
Standard deviation computing unit is obtained for the vertex lens power difference of the N*N matrix dot to be compared with standard of tolerance
The standard deviation of the N*N matrix dot；
Torsion resistance computing unit, for choosing M matrix for being distributed in the center of lens surrounding from the N*N matrix dot
Point, and weighted differences operation is carried out to the standard deviation of the M matrix dot, obtain the torsion resistance of the eyeglass, wherein M, N
For the natural number greater than 1.
6. vertometer according to claim 5, which is characterized in that the standard deviation computing unit is by the N*N square
The vertex lens power difference of lattice point is compared with standard of tolerance, obtains the standard deviation of the N*N matrix dot, comprising:
If the vertex lens power difference the standard of tolerance 2% hereinafter, if the standard deviation be equal to 0；
If the vertex lens power difference is higher than the 2% of the standard of tolerance, but is equal to the 25% of the standard of tolerance, then the standard
Difference is equal to 1；
If the vertex lens power difference is higher than the 25% of the standard of tolerance, but is less than or equal to the 50% of the standard of tolerance, then
The standard deviation is equal to 2；
If the vertex lens power difference is higher than the 50% of the standard of tolerance, but is less than or equal to the 75% of the standard of tolerance, then
The standard deviation is equal to 3；
If the vertex lens power difference is higher than the 75% of the standard of tolerance, but is less than or equal to the 100% of the standard of tolerance, then
The standard deviation is equal to 4；
If the vertex lens power difference is higher than the 100% of the standard of tolerance, but is less than or equal to the 125% of the standard of tolerance,
Then the standard deviation is equal to 5；
If the vertex lens power difference is higher than the 125% of the standard of tolerance, but is less than or equal to the 150% of the standard of tolerance,
Then the standard deviation is equal to 6.
7. vertometer according to claim 5 or 6, which is characterized in that N is equal to 9, M and is equal to 8.
8. vertometer according to claim 7, which is characterized in that mark of the torsion resistance computing unit to 8 matrix dots
Quasi- difference carries out weighted differences operation, and the distortion angle value for obtaining the eyeglass includes:
If operation result is equal to 8, the distortion angle value is equal to 0；
If operation result is greater than 9 and less than 25, the distortion angle value is equal to 25%；
If operation result is greater than 26 and less than 30, the distortion angle value is equal to 50%；
If operation result is greater than 31 and less than 35, the distortion angle value is equal to 75%；
If operation result is greater than 36 and less than 40, the distortion angle value is equal to 100%；
If operation result is greater than 41 and less than 45, the distortion angle value is equal to 125%；
If operation result is greater than 46, the distortion angle value is equal to 150%.
9. vertometer according to claim 5, which is characterized in that the vertometer includes display, the torsion resistance meter
Calculation unit is also used to control the display and shows the standard deviation of each matrix dot in torsion resistance viewing area, wherein standard deviation
The number of pixels of the display area of the different matrix dots of value is different.
10. vertometer according to claim 9, which is characterized in that the torsion resistance computing unit is also used to control described
Display shows the distortion angle value in torsion resistance viewing area.
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