CN108634924A - A kind of optometry and emulation mode based on VR technologies - Google Patents
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Abstract
Disclosed herein a kind of optometry based on VR technologies and emulation modes comprising following steps：For being observed the same imaging point of object, various possible difference visual field direction g are defined in a vector space K, the specific visual field direction g in conventional optometry is defined in another vector space K '；Define the mapping matrix T of two spaces:K′→K；The various parameters of the specific visual field direction g are converted into the parameter in the spaces K by the mapping matrix, to obtain comprising the eyeglass optimal imaging parameter under various different visual fields directions；The eyeglass produced according to the eyeglass optimal imaging parameter can meet the needs of actual use, even if wearer's Rotation of eyeball, to the visual field direction of lens edge, the imaging effect of the eyeglass is still fine.
Description
Technical field
The present invention relates to optometry technical field more particularly to a kind of optometrys and emulation mode based on VR technologies.
Background technology
At present for the design of the glasses such as the design of glasses, including spectacles, presbyopic glasses, astigmatism, usually wearing needs
The optometry of the person of asking elder generation, is then designed according to the prescription that prescription obtains, the prescription that current refraction system obtains generally wraps
Include the various eyeglass optimal imaging parameters such as the number of degrees, astigmatism, axle position, prism number of degrees.
But during conventional optometry, human eye watches the instrument in front attentively, and eyeball is only in some specific angle of rotation
It spends in (i.e. specific visual field direction), so the data that this optometry obtains are the parameter of some specific angle, this mode
Obtained prescription of spectacles can not generate directive significance to the use under big visual field.That is this optometry method can not will be different
Visual field direction under the imaging effect of (i.e. the different angle condition of Rotation of eyeball) spectacle lens consider, i.e., can not be by practical eye
Eyeball needs the picture for the entire breadth seen to be showed in a manner of eyeglass lens prescription.The prescription system obtained according to conventional optometry
The spectacle lens made can only can show best imaging effect when human eye eyeball is just at above-mentioned particular rotation angle, if
Wearer's human eye Rotation of eyeball, the inevitable different or effect poor effect of imaging effect of spectacle lens, but actually using
In the process, the rotation of human eye eyeball occurs at random.So the spectacle lens then produced by conventional optometry method are not
Actual needs can be fully met.
And also VR technologies have been used in some optometrys, such as 201710222691.3 (patent name of Chinese patent application：A kind of base
In the optometry method and VR glasses optometry units of VR technologies, patent application publication number：CN106963334A, the applying date：In April, 2017
7 days), it discloses a kind of optometry methods based on VR technologies and VR glasses optometry units, this method to establish optometry in VR systems
Special image, and using the relational expression y=f fitted between the position x for the clear image that human eye is seen and human eye number of degrees y
(x), this method has been proposed that during optometry, and user can be exchanged with VR systems by limbs or language, be fed back, from
And adjust the clarity of image.But the image definition of this method meaning obtains still as in existing optometry technology
Be best lens design parameters under some specific Rotation of eyeball direction (i.e. under some specific visual field direction).If testing
Light human eye ball turns to different directions, cannot just carry out normal optometry.
Invention content
It is an object of the invention to overcome disadvantages mentioned above, a kind of optometry based on VR technologies and emulation mode are provided, it will
The rotation of human eye ball considers during optometry.
To achieve the above object, the technical solution adopted in the present invention is：
A kind of optometry and emulation mode based on VR technologies, include the following steps：
The first step：Optical axis direction Z, observed object are simulated in VR systems；
Second step, design of Simulation goes out an eyeglass in VR systems, which is placed on the optical axis direction and makes its position
Between human eye and observed object, human eye is observed by the eyeglass and is observed object；
Third walks：For being observed the same imaging point of object, various possible difference visual field direction g are defined on one
In a vector space K, the specific visual field direction g in conventional optometry is defined in another vector space K '；
4th step, the mapping matrix T for defining two spaces:K′→K；
5th step, the ginseng that the various parameters of the specific visual field direction g are converted into the spaces K by the mapping matrix
Number, to obtain comprising the eyeglass optimal imaging parameter under various different visual fields directions.
It is defined in the spaces K ', some Rotation of eyeball direction, g (a, b) direction vector can improve imaging, in this arrow
It measures on direction g (a, b), the light energy that human eye captures is I (a, b, λ), and wherein λ is wavelength；In the spaces K, human eye is in vector
The light energy captured on direction g (as, bs) is I (as, bs, λ), according to above-mentioned mapping matrix T:K ' → K defines two space K
With the mapping matrix G of K ' light energies：I (a, b, λ) → I (as, bs, λ), and eyeglass optimal imaging effect is calculated according to following formula
Parameter：
I(as,bs,λ)=∫ ∫K'f(as,bs,a,b,λ)I(a,b,λ)dadb
In formula, it includes that the eyeglass is best that f (as, bs, a, b, λ), which represents the final point transmission function of some transmission functions to be,
Imaging effect parameter,.
Above-mentioned calculation formula use is in vector space, since the Rotation of eyeball of human eye is that have different angles, so I
Angle a and b in (a, b, λ) and I (as, bs, λ) have a variety of different values, therefore they are respectively defined as I (aj,bj, λ) and
I(asj,bsj, λ), j=1 ... ... ..m, wherein j=1 ... ... ..m indicates different angles.
Maximal end point transmission function is calculated according to the formula of above-mentioned calculating maximal end point transmission function to include the following steps：
(1) a series of I (asj, bsj, λ), j=1 are chosen for particular picture in the spaces K ... ... ..m；
(2) mapping matrix G is calculated：I (aj, bj, λ) → I (asj, bsj, λ), j=1 ... ... ..m；
(3) point transmission function f (as, bs, a, b, λ) is calculated；
(4) in the spaces K ', three kinds of wavelength are chosen for above-mentioned particular picture, an iterative calculation point transmission function f (as, bs,
a,b,λ)；
(5) result of calculation of above-mentioned (2) step to (4) step is updated to the formula of above-mentioned calculating maximal end point transmission function
In, it includes eyeglass optimal imaging parameter to calculate final point transmission function f, the final point transmission function f.
The optometry and emulation mode based on VR technologies, further include eyeglass verification method, the eyeglass verification method packet
Include following steps：
The eyeglass optimal imaging parameter that 1st step, the VR systems are obtained according to the above-mentioned first step to the 5th step is to above-mentioned imitative
The eyeglass really designed is adjusted and is formed as new eyeglass, and each parameter of the new eyeglass complies fully with the eyeglass optimal imaging
Parameter；
2nd step simulates human eye by the new observed object of eyeglass observation, and during passing through observation, by not again
Equidirectional angular turn eyeball verifies the imaging effect of new eyeglass.
Beneficial effects of the present invention are：And invent and go out eyeglass using VR technology design of Simulation, and simulate human eye and pass through eyeglass
Object to be seen is observed, by the various parameters under some specific visual field direction in the practical optometry of tradition, by mapping matrix,
It is converted into including the best image lenses parameter in various different visual fields directions；I other words the present invention is by the not Tongfang of Rotation of eyeball
To consideration during optometry, the mirror to be made according to the best lens parameters that optometry of the present invention and emulation mode obtain
Piece is entirely capable of meeting the needs of Rotation of eyeball different directions in actual use, i.e., in wearer's Rotation of eyeball to lens edge visual field
Under direction, the imaging effect of the eyeglass is equally fine, only will appear smaller astigmatism, aberration, distortion；I other words present invention profit
Optometry is combined with emulation with VR technologies, so as to provide total solution for high-precision optometry, vision correction, solution
Determined optometry under single visual field direction in the prior art the problem of.
Description of the drawings
Fig. 1 is the flow diagram of optometry of the present invention and emulation mode；
Fig. 2 is the schematic diagram of eyeball some rotation direction g vectors in the method for the present invention；
Fig. 3 is in the method for the present invention in K and Rotation of eyeball direction schematic diagram under two different spaces of K '；
Fig. 4 is the Three-dimensional Display model schematic of progressive multi-focus lens curvature in the method for the present invention；
Fig. 5 is progressive multi-focus lens sectional curvature display schematic diagram in the method for the present invention.
Specific implementation mode
As shown in Figure 1, the present invention is based on the optometrys of VR technologies and emulation mode to include the following steps：
The first step：Optical axis direction Z, observed object are simulated in VR systems；
Second step：Design of Simulation goes out an eyeglass in VR systems, which is placed on the optical axis direction and makes its position
Between human eye and observed object, human eye is observed by the eyeglass and is observed object；
Third walks：For being observed the same imaging point of object, various possible difference visual field direction g are defined on one
In a vector space K, the specific visual field direction g in conventional optometry is defined in another vector space K '；
4th step, the mapping matrix T for defining two spaces:K′→K；
5th step, the ginseng that the various parameters of the specific visual field direction g are converted into the spaces K by the mapping matrix
Number, to obtain comprising the eyeglass optimal imaging parameter under various different visual fields directions.
As shown in Fig. 2, in angular coordinate system, vector g (a, b) is g in the projection components of YOZ planesy, in XOZ planes
Projection components be gx, wherein gxAngle with Z-direction is a, gxAngle with Z-direction is b, and the direction of optical axis is defined as the side Z
To human eye is located at 0 position.
As shown in figure 3, human eye is observed by eyeglass is observed object, optical axis is the directions z, have on observed object two point A,
B, when human eye is under some Rotation of eyeball angle, i.e., visual field direction is gAUnder, A points can be clearly observed by glasses,
It is g in visual field directionBUnder, it can be clearly observable B points, g by glassesAAnd gBFor specific direction, it is empty to be defined on above-mentioned vector
Between in K '.In vector space K, there is arbitrary more direction to be observed that the A points on object, such as gASIt is similarly swearing in direction
In quantity space K, there is arbitrary more direction to be observed that the B points on object, such as gBSDirection.It is to be understood that in routine
In refraction system, only the imaging effect of glasses, such as astigmatism, aberration, distortion parameter are evaluated in the spaces K '.And the present invention is then
It is the parameter that the various parameters of the specific visual field direction g are converted into the spaces K by the mapping matrix, i other words by K ' skies
Between parameter the parameter in the spaces K is converted by mapping matrix T, i.e., the preferable image-forming condition under single visual field is converted into more
Preferable image-forming condition under a visual field.Wherein mapping matrix can be reflected under conditions of human eye Rotation of eyeball, and eyeglass is original
How image quality (astigmatism, aberration, distortion etc.) declines.
In angular coordinate system, the mapping matrix T:K ' → K is interpreted as T：(a,b)→(as,bs).
Mapping matrix T in order to better understand is defined in the spaces K ', some Rotation of eyeball direction, g (a, b) vector
Direction can improve imaging, and in other words under traditional optometry mode, the wearer of glasses can clearly observe in the direction
To object to be seen, i.e. eyeglass is all corrected in a reasonable range of comparison astigmatism, aberration, distortion etc..In this vector
On direction g (a, b), the light energy that human eye captures is I (a, b, λ), and wherein λ is wavelength；In the spaces K, human eye is in vector side
The light energy captured on g (as, bs) is I (as, bs, λ), according to above-mentioned mapping matrix T:K ' → K defines reflecting for light energy
Penetrate matrix G：I (a, b, λ) → I (as, bs, λ), and eyeglass optimal imaging efficacy parameter is calculated according to following formula：
I (as, bs, λ)=∫ ∫K'f(as,bs,a,b,λ)I(a,b,λ)dadb
In formula, f (as, bs, a, b, λ) represents some transmission functions, final point transmission function include the eyeglass most
Good imaging effect parameter, point transmission function can be understood as the association function of different monochrome images.From above-mentioned calculating
Formula can be seen that in the spaces K, and the light energy I (as, bs, λ) that human eye captures is equal to I (a, b, λ) and point transmission function f
The integral of (as, bs, a, b, λ).
Above-mentioned calculation formula use is in vector space, since the Rotation of eyeball of human eye is that have different angles, so I
Angle a and b in (a, b, λ) and I (as, bs, λ) have a variety of different values, it is therefore necessary to which they are respectively defined as I (aj,bj,
λ) and I (asj,bsj, λ), j=1 ... ... ..m, wherein j=1 ... ... ..m is to indicate different angles.
Eyeglass optimal imaging efficacy parameter is calculated according to above-mentioned formula to include the following steps：
(1) in the spaces K, particular picture (i.e. under some visual field direction, is thought to compare by traditional optometry eye-observation
A kind of more visible picture, such as the commonly E sub-tables in various directions), choose a series of I (asj,bsj, λ), j=
1,...........m；
(2) mapping matrix G is calculated：I(aj,bj,λ)→I(asj,bsj, λ), j=1 ... ... ..m；
(3) point transmission function f (as, bs, a, b, λ) is calculated；
(4) wavelength of tri- kinds of light of F, D, C, iterative calculation point transmission function are chosen for above-mentioned particular picture in the spaces K '
f(as,bs,a,b,λ)；
(5) result of calculation of above-mentioned (2) step to (4) step is updated in above-mentioned calculation formula, is calculated final
Point transmission function f, finally obtained transmission function include eyeglass optimal imaging parameter.It is I (a to walk mapping matrix Gj,bj,λ)→
I(asj,bsj, λ), i.e., by the Parameter Switch in the spaces K ' to the spaces K, described (1) step and the ginseng that (2) are then the known spaces K
It counts, then the parameter in the spaces reverse push K '.
The F light is green light, and wavelength 486nm, D light is yellow light, and wavelength 589nm, C light is feux rouges, and wavelength is
656nm。
The point transmission function that described (2) step is calculated with (4) step is final point transmission function f under the conditions of monochromatic light
It is the final result considered under different wavelength.
In conclusion the present invention considers Rotation of eyeball during optometry, some in the practical optometry of tradition is special
Determine the various parameters under visual field direction, by mapping matrix, is converted into including the best image lenses in various different visual fields directions
Parameter, i.e., by under different visual field directions, the condition of the image imaging clearly of large format will provide, to solve in the prior art
Under single visual field the problem of optometry.
During the threedimensional model of progressive multi-focus lens as shown in Figure 4 is shown, color difference represents different lens curvatures
Radius.
Progressive multi-focus lens as shown in Figure 5, in certain one side of eyeglass, radius of curvature constantly changes, i.e., eyeball is not
Under same rotation direction, the number of degrees of glasses are different, and for seamlessly transitting for this different radii value, spline curve is shown not
Same radius of curvature, radius of curvature size relative value are determined by the opposite length of index line.
In this kind of progressive multi-focus lens seamlessly transitted shown by Fig. 4,5, under different visual field directions, eyeglass
The number of degrees are different, if more errors will be generated using optometry hair method traditional at present, and utilize optometry provided by the invention and
Emulation mode can effectively reduce error, improve the optometry accuracy of such eyeglass.
It is illustrated by taking the presbyopic lens of a progressive additional as an example, i.e., if wearer is it is desirable that a near reading range
The presbyopic glasses of+5.0D, while having other number of degrees depending on far field, near reading range and depending on there are transition region and glasses between far field
Peripheral region, for conventional optometry, when carrying out such optometry, accuracy needs and by optometry person's accurate fit
It can complete, error is larger；And the presbyopic of+5.0D made by the best image lenses parameter that the method for the present invention obtains
Mirror, remote apart from glasses 40cm, after 35 degree of wearer's Rotation of eyeball, observation visual field direction effect, presbyopic glasses distortion is less than
2%, the astigmatism in meridian and sagitta of arc direction is less than 0.03D, and optometry accuracy is very high.
In the present embodiment, preferably, further including eyeglass authentication the present invention is based on the optometry of VR technologies and emulation mode
Method, the eyeglass verification method include the following steps：
The eyeglass optimal imaging parameter that 1st step, the VR systems are obtained according to the above-mentioned first step to the 5th step is to above-mentioned imitative
The eyeglass really designed is adjusted and is formed as new eyeglass, and each parameter of the new eyeglass complies fully with the eyeglass optimal imaging
Parameter；
2nd step simulates human eye by the new observed object of eyeglass observation, and during passing through observation, by not again
Equidirectional angular turn eyeball verifies the imaging effect of new eyeglass, such as astigmatism, aberration, distortion parameter.
In this way, may further ensure that the eyeglass that optometry through the invention and emulation mode obtain by eyeglass verification method
The validity of optimal imaging parameter.
Claims (5)
1. a kind of optometry and emulation mode based on VR technologies, it is characterised in that：Include the following steps：
The first step：Optical axis direction Z, observed object are simulated in VR systems；
Second step, design of Simulation goes out an eyeglass in VR systems, which is placed on the optical axis direction and is located at people
Between eye and observed object, human eye is observed by the eyeglass and is observed object；
Third walks：For being observed the same imaging point of object, various possible difference visual field direction g are defined on an arrow
In quantity space K, the specific visual field direction g in conventional optometry is defined in another vector space K '；
4th step, the mapping matrix T for defining two spaces:K′→K；
5th step, the parameter that the various parameters of the specific visual field direction g are converted into the spaces K by the mapping matrix, from
And it obtains comprising the eyeglass optimal imaging parameter under various different visual fields directions.
2. optometry and emulation mode according to claim 1 based on VR technologies, it is characterised in that：It is defined on the spaces K '
In, some Rotation of eyeball direction, g (a, b) direction vector can improve imaging, on this direction vector g (a, b), human eye
The light energy captured is I (a, b, λ), and wherein λ is wavelength；In the spaces K, human eye captures on direction vector g (as, bs)
Light energy be I (as, bs, λ), according to above-mentioned mapping matrix T:K ' → K defines the mapping matrix of two space K and K ' light energies
G：I (a, b, λ) → I (as, bs, λ), and eyeglass optimal imaging efficacy parameter is calculated according to following formula：
I (as, bs, λ)=∫ ∫K'f(as,bs,a,b,λ)I(a,b,λ)dadb
In formula, it includes the eyeglass optimal imaging effect that f (as, bs, a, b, λ), which represents the final point transmission function of point transmission function,
Fruit parameter, da, db representative integrate variable a, b.
3. optometry and emulation mode according to claim 2 based on VR technologies, it is characterised in that：Above-mentioned calculation formula makes
In vector space, since the Rotation of eyeball of human eye is that have different angles, so in I (a, b, λ) and I (as, bs, λ)
Angle a and b have a variety of different values, therefore they are respectively defined as I (aj,bj, λ) and I (asj,bsj, λ), j=
1 ... ... ..m, wherein j=1 ... ... ..m indicates different angles.
4. optometry and emulation mode according to claim 3 based on VR technologies, it is characterised in that：
Maximal end point transmission function is calculated according to the formula of above-mentioned calculating maximal end point transmission function to include the following steps：
(1) a series of I (asj, bsj, λ), j=1 are chosen for particular picture in the spaces K ... ... ..m；
(2) mapping matrix G is calculated：I (aj, bj, λ) → I (asj, bsj, λ), j=1 ... ... ..m；
(3) point transmission function f (as, bs, a, b, λ) is calculated；
(4) in the spaces K ', three kinds of wavelength are chosen for above-mentioned particular picture, an iterative calculation point transmission function f (as, bs, a, b,
λ)；
(5) result of calculation of above-mentioned (2) step to (4) step is updated in the formula of above-mentioned calculating maximal end point transmission function,
It includes eyeglass optimal imaging parameter to calculate final point transmission function f, the final point transmission function f.
5. optometry and emulation mode according to claim 1 or 2 or 3 or 4 based on VR technologies, it is characterised in that：Also wrap
Eyeglass verification method is included, the eyeglass verification method includes the following steps：
1st step, the VR systems set above-mentioned emulation according to the eyeglass optimal imaging parameter that the above-mentioned first step is obtained to the 5th step
The eyeglass counted out is adjusted and is formed as new eyeglass, and each parameter of the new eyeglass complies fully with the eyeglass optimal imaging ginseng
Number；
2nd step simulates human eye by the new observed object of eyeglass observation, and during passing through observation, passes through not Tongfang again
The imaging effect of new eyeglass is verified to angular turn eyeball.
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