CN209417457U - The humorous diffraction Alvarez zoom intelligent glasses of sandwich style - Google Patents
The humorous diffraction Alvarez zoom intelligent glasses of sandwich style Download PDFInfo
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- CN209417457U CN209417457U CN201821397400.0U CN201821397400U CN209417457U CN 209417457 U CN209417457 U CN 209417457U CN 201821397400 U CN201821397400 U CN 201821397400U CN 209417457 U CN209417457 U CN 209417457U
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Abstract
The utility model discloses a kind of humorous diffraction Alvarez zoom intelligent glasses of sandwich style；Including mirror holder and eyeglass；Eyeglass is all made of a humorous diffraction Alvarez lens group, and a humorous diffraction Alvarez lens group is made of three eyeglasses；Each eyeglass is designed with a humorous diffraction micro structural surface, and two, the outside lens of every group of eyeglass are fixed on mirror holder, and form sealing space, and intermediate lens are fixed on the guide rail of mirror holder by sliding block, and intermediate lens are slided along the direction perpendicular to optical axis；Humorous diffraction micro structural surface is obtained by Alvarez lens removal phase difference, and the mirror holder front two sides are respectively equipped with one or more range sensors；It realizes according to the distance of wearer's object observing and automatically adjusts focal power, enable a user to the state observation target with the most comfortable, alleviate the fatigue of eye muscle, for eyesight user normal for teenager, can achieve pre- myopic-preventing purpose.
Description
Technical field
The utility model relates to a kind of intelligent glasses, and in particular to a kind of intelligence using humorous diffraction Alvarez lens
It can glasses.
Background technique
Country defends to reveal in the special news news conference that strong committee holds on June 4th, 2018: China's myopia number alreadys exceed
4.5 hundred million, the myopia morbidity presentation age is early, be in progress fast, far-gone trend.Wherein, pupil's myopia disease incidence is about 30%, greatly
Student is about 90%.Close eye is considered as influencing the first risk factor of development of myopia.Electronic product is got at present
To enter in people's lives more, teenager is the critical period of refractive status development in the stage, and learns heavy period,
The self-control that teenager uses electronic product is poor, and it is increasing to cause adolescent myopia specific gravity, near-sighted phenomenon
Increasingly become younger.
In China, presbyopia's phenomenon more makes a kind of universal phenomenon, and presbyopia and age growth are closely related, usually at 45 years old
Front and back starts to show, and deepens year by year.According to being directed to recentlyShanghai, Beijing, Guangzhou,Hangzhou, ground such as Nanjing 50 years old or more resident
One-to-one investigational data show that most probably 50 years old or more crowd is influenced by presbyopia, and the ratio in Shanghai and Nanjing is even more high
Up to nearly 90%.More it is a concern that IState is oldPresbyopia crowd gradually moves towards rejuvenation.Eye natural crystal just looks like one
Portion's machine, it may be because is increased and natural aging using the time, it is also possible to because overusing and accelerated ageing.Due to the modern times
Social people rely on the various electronic equipment height such as computer, mobile phone, TV, while life and work pressure constantly increases, people
Universal excess eye-using is chronically at visual fatigue state, therefore is easier that crystal elasticity is caused to accelerate to weaken, so that presbyopia sends out
The sick age constantly shifts to an earlier date.
Patients with presbyopia needs are used alternatingly by Progressive addition lenses or more pair of glasses is just able to satisfy different visual demands.
Some patients with presbyopia may possess a secondary reading spectacles simultaneously, a pair sees Computer glasses, a secondary outdoor glasses and a passenger side
Sail glasses etc., What is more may at home andCompanyEtc. different places be respectively equipped with a whole set of glasses, as one can imagine, can be to normal
Life brings great trouble.
Summary of the invention
The utility model in view of the deficiencies of the prior art, proposes a kind of humorous diffraction Alvarez zoom intelligence of sandwich style
Glasses.
A kind of humorous diffraction Alvarez zoom intelligent glasses of sandwich style of the utility model, including mirror holder and eyeglass；Eyeglass is all
It is made of a humorous diffraction Alvarez lens group, a humorous diffraction Alvarez lens group is made of three eyeglasses；Each eyeglass
It is designed with a humorous diffraction micro structural surface, two, the outside eyeglass of every group of eyeglass is fixed on mirror holder, and forms sealing space,
Intermediate eyeglass is fixed on the guide rail of mirror holder by sliding block, and intermediate eyeglass is slided along the direction perpendicular to optical axis；Humorous diffraction
Micro-structure surface is obtained by Alvarez lens removal phase difference；
Alvarez lens polynomial equation are as follows:
Wherein, z is two polynomial surface height, and A is multinomial coefficient, and f (x, y) is higher order polynomial.
F (x, y)=b1xy4+b2x3y2+b3x5+b4xy6+b5x3y4+b6x5y2+b7x7+…
Wherein, b1,b2,b3... it is higher order polynomial coefficient.
Generate focal length are as follows:
Wherein, δ is two Alvarez lens combination focal powers, and A is multinomial coefficient, and 2 δ are two Alvarez lens
Between relative movement distance, n be Alvarez lens Refractive Index of Material；
The phase difference of Alvarez lens and the relationship of optical path difference are:
WhereinFor phase difference, λ is wavelength, and Δ δ is optical path difference；
By m times of integer that Alvarez lens removal phase difference is 2 π, remaining part is m times that optical path difference is 2 π
Humorous diffraction Alvarez lens；m≥2；
One or more range sensors are respectively equipped with as preferential, described mirror holder front two sides, the distance passes
Sensor is connect with control circuit module；The control circuit module is connect with driving motor, and the driving motor passes through drive
Dynamic screw thread pair driving sliding block sliding.
As preferential, two, the outside eyeglass of every group of eyeglass contains a humorous diffraction micro structural surface, and humorous diffraction is micro-
Body structure surface is located at the surface adjacent with intermediate eyeglass, and the surface far from intermediate eyeglass is that plane, spherical surface or spherical surface are non-
Spherical surface；Intermediate former and later two faces of eyeglass are humorous diffraction micro structural surface.
As preferential, two, the outside eyeglass of every group of eyeglass contains a humorous diffraction micro structural surface, and humorous diffraction is micro-
Body structure surface is located remotely from the adjacent surface of intermediate eyeglass, and the adjacent surface with intermediate eyeglass is plane, spherical surface or ball
Face is aspherical；Intermediate former and later two faces of eyeglass are humorous diffraction micro structural surface.
As preferential, two, the outside eyeglass of every group of eyeglass contains a humorous diffraction micro structural surface, two, outside mirror
One of them humorous diffraction micro structural surface in piece is located at the surface adjacent with intermediate eyeglass, another eyeglass and intermediate mirror
The separate surface of piece is humorous diffraction micro structural surface；Intermediate former and later two faces of eyeglass are humorous diffraction micro structural surface；Outside
The residual surface of two eyeglasses is that plane, spherical surface or spherical surface are aspherical.
As preferential, the surface of three eyeglasses is humorous diffraction micro structural surface.
The utility model, which has the advantages that realize according to the distance of wearer's object observing, automatically adjusts light focus
Degree, enables a user to the state observation target with the most comfortable, alleviates the fatigue of eye muscle, eyesight normal for teenager
For user, pre- myopic-preventing purpose can achieve；For the elderly's patients with presbyopia, patients with presbyopia can be convenient
Distant place and target nearby can clearly be seen clearly simultaneously.Closed lens structure is formed using sandwich structure, avoid dust,
Steam enters in eyeglass gap；Multiple humorous diffraction micro structural surfaces are used simultaneously, make the thickness of each humorous diffraction Alvarez eyeglass
Degree substantially reduces, and the interval between adjacent humorous diffraction Alvarez eyeglass is greatly reduced, so that the thickness of lens set also drops significantly
Low, entire intelligent glasses weight is greatly reduced.
Detailed description of the invention
Fig. 1 intelligence Zoom glasses system construction drawing.
The continuous polynomial free curved surface Alvarez variable focus lens package working principle diagram of Fig. 2 sandwich structure.
The continuous polynomial free curved surface Alvarez lens of Fig. 3 phase-compression sandwich structure become humorous diffraction Alvarez
Lens.
Fig. 4 polynomial free curved surface is located at the sandwich structure Alvarez lens group (Fig. 4 (a)) of adjacent surface by phase
The compressed humorous diffraction Alvarez lens group (Fig. 4 (b)) in position.
In Fig. 5 sandwich structure, 6 surfaces of three pieces Alvarez lens are the Alvarez of polynomial free curved surface saturating
Humorous diffraction Alvarez lens group (Fig. 5 (b)) of the microscope group (Fig. 5 (a)) after phase-compression.
Fig. 6 (a) is focal power sandwich structure when being 0, eyeglass humorous diffraction micro structural surface in front and back is located at close to intermediate mirror
The Alvarez variable focus lens package schematic diagram on piece surface；
Fig. 6 (b) is that focal power is timing sandwich structure, and eyeglass humorous diffraction micro structural surface in front and back is located at close to intermediate mirror
The Alvarez variable focus lens package schematic diagram on piece surface；
Sandwich structure when Fig. 6 (c) is negative for focal power, the humorous diffraction micro structural surface of front and back eyeglass are located at close to intermediate mirror
The Alvarez variable focus lens package schematic diagram on piece surface；
Fig. 7 (a) is focal power sandwich structure when being 0, eyeglass humorous diffraction micro structural surface in front and back is located remotely from intermediate mirror
The Alvarez variable focus lens package schematic diagram on the surface of piece；
Fig. 7 (b) is that focal power is timing sandwich structure, and eyeglass humorous diffraction micro structural surface in front and back is located remotely from intermediate mirror
The Alvarez variable focus lens package schematic diagram on the surface of piece；
Sandwich structure when Fig. 7 (c) is negative for focal power, the humorous diffraction micro structural surface of front and back eyeglass are located remotely from intermediate mirror
The Alvarez variable focus lens package schematic diagram on the surface of piece；
Fig. 8 (a) is focal power sandwich structure when being 0, the humorous diffraction micro structural surface of front lens is located at close to intermediate eyeglass
Surface, the humorous diffraction micro structural surface of rear lens is located remotely from the Alvarez variable focus lens package principle on the surface of intermediate eyeglass
Figure；
Fig. 8 (b) is that focal power is timing sandwich structure, and the humorous diffraction micro structural surface of front lens is located at close to intermediate eyeglass
Surface, the humorous diffraction micro structural surface of rear lens is located remotely from the Alvarez variable focus lens package principle on the surface of intermediate eyeglass
Figure；
Sandwich structure when Fig. 8 (c) is negative for focal power, the humorous diffraction micro structural surface of front lens are located at close to intermediate eyeglass
Surface, the humorous diffraction micro structural surface of rear lens is located remotely from the Alvarez variable focus lens package principle on the surface of intermediate eyeglass
Figure；
Fig. 9 (a) is focal power sandwich structure when being 0, the humorous diffraction micro structural surface of front lens is located remotely from intermediate eyeglass
Surface, the humorous diffraction micro structural surface of rear lens is located at the Alvarez variable focus lens package principle close to the surface of intermediate eyeglass
Figure；
Fig. 9 (b) is that focal power is timing sandwich structure, and the humorous diffraction micro structural surface of front lens is located remotely from intermediate eyeglass
Surface, the humorous diffraction micro structural surface of rear lens is located at the Alvarez variable focus lens package principle close to the surface of intermediate eyeglass
Figure；
Sandwich structure when Fig. 9 (c) is negative for focal power, the humorous diffraction micro structural surface of front lens are located remotely from intermediate eyeglass
Surface, the humorous diffraction micro structural surface of rear lens is located at the Alvarez variable focus lens package principle close to the surface of intermediate eyeglass
Figure；
Figure 10 (a) is focal power when being 0 in sandwich structure, and six surfaces of three eyeglasses are humorous diffraction micro structural table
Face；
Figure 10 (b) is that focal power is in timing sandwich structure, and six surfaces of three eyeglasses are humorous diffraction micro structural
Surface；
When Figure 10 (c) is negative for focal power in sandwich structure, six surfaces of three eyeglasses are humorous diffraction micro structural
Surface；
In the humorous diffraction Alvarez zoom intelligent glasses structure of Figure 11 sandwich, interior outer lens are fixed, and interior eyeglass can edge
Perpendicular to the direction movement of optical axis, the humorous diffraction micro structural surface of interior outer lens is located at the Working mould close to the surface of intermediate lens
Formula.
In the humorous diffraction Alvarez zoom intelligent glasses structure of Figure 12 sandwich, interior outer lens are fixed, and interior eyeglass can edge
Perpendicular to the direction movement of optical axis, the humorous diffraction micro structural surface of interior outer lens is located at foremost and rearmost two surfaces
Operating mode.
In the humorous diffraction Alvarez zoom intelligent glasses structure of Figure 13 sandwich, interior outer lens are fixed, and interior eyeglass can edge
Perpendicular to the direction movement of optical axis, the humorous diffraction micro structural surface of outer lens is located at close to the surface of intermediate lens, interior eyeglass
Humorous diffraction micro structural surface is located remotely from the operating mode on the surface of intermediate eyeglass.
In the humorous diffraction Alvarez zoom intelligent glasses structure of Figure 14 sandwich, interior outer lens are fixed, and interior eyeglass can edge
Perpendicular to the direction movement of optical axis, the humorous diffraction micro structural surface of outer lens is located remotely from the surface of intermediate lens, interior eyeglass
Humorous diffraction micro structural surface is located at the operating mode close to the surface of intermediate eyeglass.
In the humorous diffraction Alvarez zoom intelligent glasses structure of Figure 15 sandwich, interior outer lens are fixed, and interior eyeglass can edge
Perpendicular to the direction movement of optical axis, two surfaces of interior outer lens and intermediate eyeglass are the Working mould on humorous diffraction micro structural surface
Formula.
The humorous diffraction Alvarez zoom intelligent glasses working principle of Figure 16；Figure 16 (a) normal person soon distant objects when show
It is intended to；State when Figure 16 (b) eye-observation closer object, corneal curvature become larger, and axis oculi elongates；Figure 16 (c) puts on humorous spread out
State when eye-observation distant objects after Alvarez zoom intelligent glasses is penetrated, the focal power of variable focus lens package is 0 at this time；Figure
16 (d) put on state when eye-observation near objects after humorous diffraction Alvarez zoom intelligent glasses, at this time variable focus lens package
Focal power is positive, enable object nearby do not change cornea curvature and axis oculi length in the case where remain to clearly
It is imaged on the retina of human eye.
The humorous diffraction Alvarez lens group equivalent optical system figure of Figure 17 sandwich, is equivalent to two pairs of two panels structure compositions
Humorous diffraction Alvarez lens group.
Specific embodiment
As shown in Figure 1, a kind of sandwich style Alvarez zoom intelligent glasses, including mirror holder and eyeglass；The eyeglass of every side is all
It is made of a humorous diffraction Alvarez lens group 4, a humorous diffraction Alvarez lens group is made of three eyeglasses, each eyeglass
It is designed with a humorous diffraction micro structural surface；Two, the outside lens of every group of eyeglass are fixed on mirror holder, and form sealing space,
Intermediate lens are fixed on the sliding groove 2 of mirror holder by sliding block, and intermediate lens are slided along the direction perpendicular to optical axis, humorous to spread out
Micro-structure surface is penetrated to be obtained by Alvarez lens removal phase difference；The mirror holder frontal left is equipped with first sensor 1, mirror
The positive right side of face of frame is equipped with 3rd sensor 5, and mirror holder front is intermediate to be equipped with second sensor 3, the range sensor and control
Circuit module connection；The control circuit module 13 is connect with the first driving motor 7, the second driving motor 1, two driving electricity
Machine drives sliding block sliding by the first screw thread pair 10, the second screw thread pair 12.The driving motor and control circuit is by battery mould
Block 6 is powered；The Alvarez zoom intelligent glasses are additionally provided with two indicator lights, are respectively intended to display electricity and glasses focal length
State；When work, intermediate lens are slided along the direction perpendicular to optical axis；
Alvarez lens surface polynomial equation is (assuming that moving direction is the direction x):
Wherein, z is two polynomial surface height, and A is multinomial coefficient, and f (x, y) is higher order polynomial.
F (x, y)=b1xy4+b2x3y2+b3x5+b4xy6+b5x3y4+b6x5y2+b7x7+…
Wherein, b1,b2,b3... it is higher order polynomial coefficient.
Generate focal length are as follows:
Wherein,For two Alvarez lens combination focal powers, A is multinomial coefficient, and 2 δ are two Alvarez lens
Between relative movement distance, n be Alvarez lens Refractive Index of Material.
Humorous diffraction Alvarez lens remain the original feature of Alvarez lens group, i.e., and the 2nd Alvarez is saturating
Relative to the first Alvarez lens along moving perpendicular to optical axis direction, the focal length of Alvarez lens group can change mirror；Together
When it also has the attributes of Harmonic diffractive lenses, can greatly reduce the thickness of lens, and overcome spread out to a certain extent
Emitter part the shortcomings that there are big color difference.
(focus f is set to make the resonance light wave of Harmonic diffractive lenses converge at the original focus of lens0), it needs to keep it full
The certain condition of foot.When the wavelength used is λ, the focal length of lens are as follows:
For Harmonic diffractive lenses, optical path difference is m λ between annulus0, being equivalent to design wavelength is m λ0, focal length f0's
Common diffraction lens.If to using the p level that wavelength is λ to be imaged, focal length are as follows:
If it is required that fp,λWith former focal length f0It is overlapped, i.e., should meet condition:
It can thus be concluded that:
This just illustrates, for Harmonic diffractive lenses, all wavelength meet resonance light wave corresponding to the integer p of formula (6) and will
Gather common focus f0Place, m are the structural parameters having determined when design, and m is bigger, is determining the resonance wavelength in spectrum segment
It is more.M provides another design freedom, converges to same position to control several wavelength in given spectral region
It sets.By the first lens of Alvarez lens group and the second lens removal phase difference be 2 π integer m (m >=2) again (such as Fig. 3 institute
Show), remaining part is m times of the humorous diffraction Alvarez lens group that optical path difference is 2 π.Phase-compression height δ=m in Fig. 3
λ0/ (n-1), n are the refractive index of lens material.
As shown in Fig. 4 (a), Fig. 4 (b), the sandwich structure Alvarez that polynomial free curved surface is located at adjacent surface is saturating
Humorous diffraction Alvarez lens group of the microscope group after phase-compression；As shown in Fig. 5 (a), Fig. 5 (b), in sandwich structure, three
6 surfaces of piece Alvarez lens are humorous diffraction of the Alvarez lens group of polynomial free curved surface after phase-compression
Alvarez lens group；Multiple humorous diffraction micro structural surfaces are used simultaneously, keep the thickness of each humorous diffraction Alvarez eyeglass big
Big to reduce, the interval between adjacent humorous diffraction Alvarez eyeglass is greatly reduced, so that the thickness of lens set is greatly reduced,
Entire intelligent glasses weight is greatly reduced.
As shown in Fig. 6, Figure 11, two, the outside eyeglass of every group of eyeglass contains a humorous diffraction micro structural surface, and humorous
Diffraction micro structural surface is located at the surface adjacent with intermediate eyeglass, the surface far from intermediate eyeglass be plane, spherical surface or
Spherical surface is aspherical；Intermediate former and later two faces of eyeglass are humorous diffraction micro structural surface；When work, intermediate lens along perpendicular to
It slides in the direction of optical axis.
As shown in Fig. 7, Figure 12, two, the outside eyeglass of every group of eyeglass contains a humorous diffraction micro structural surface, and humorous
Diffraction micro structural surface is located remotely from the adjacent surface of intermediate eyeglass, and the adjacent surface with intermediate eyeglass is plane, spherical surface
Or spherical surface is aspherical；Intermediate former and later two faces of eyeglass are humorous diffraction micro structural surface；When work, intermediate lens are along vertical
Directly slided in the direction of optical axis.
As shown in Fig. 8, Fig. 9, Figure 13, Figure 14, two, the outside eyeglass of every group of eyeglass contains a humorous diffraction micro structural
Surface, one of them humorous diffraction micro structural surface in the eyeglass of two, outside is located at the surface adjacent with intermediate eyeglass, another
A eyeglass is humorous diffraction micro structural surface with the separate surface of intermediate eyeglass；Intermediate former and later two faces of eyeglass are humorous diffraction
Micro-structure surface；The residual surface of two eyeglasses in outside is that plane, spherical surface or spherical surface are aspherical；When work, intermediate lens
It is slided along the direction perpendicular to optical axis.As shown in Figure 10, Figure 15, the surface of three eyeglasses is humorous diffraction micro structural surface.
As shown in Figure 16 (a), human eye when observing distant objects, image distant objects on the retina, polished bard
The nerve generation nerve impulse swashed on the retina is transmitted to cerebral cortex generation visual perception along optic nerve fiber.When seeing nearby
When object, as shown in Figure 16 (b), if the state holding of human eye sees that the state of distant place is constant, at this time formed by near objects
Rear portion as that can project human eye retina, in order to see object nearby clearly, the ciliary muscle of human eye can be tightened, and make the focal length of human eye
It shortens, while the extraocular muscle of human eye can make the eyeball of people elongate (i.e. image distance increase) in optical axis direction, passes through the muscle of human eye
It adjusts, object nearby be imaged also can on the retina.If human eye works long hours under short distance state, ciliary muscle and
Extraocular muscle can generate spasm, can not be restored to the position of relaxation state to generate near-sighted phenomenon.The intelligence of our utility models
Zoom glasses working principle is the range sensor inspection in the object of eye-observation distant place (shown in such as Figure 16 (c)), on glasses
The distance of objective plane is measured, the position of mobile activity Alvarez eyeglass makes the focal power 0 of variable focus lens package, human eye work
(state of distant objects is seen when not wearing glasses, eye muscle is in relaxation state) in normal state, when eye-observation nearby
When target (for example reading a book, see the mobile phone screen), the displacement sensor on intelligent glasses detects object distance human eye at this time
Distance, control activity Alvarez eyeglass are moved to suitable position, and the focal power of variable focus lens package is made to be positive (such as 300 degree), this
The state that human eye remains to when observing distant objects when a sees target nearby, and the muscle in human eye portion is in and loosens shape
State (shown in such as Figure 16 (d)).Intelligent Zoom glasses can make human eye always work in the state that eye muscle loosens, to prevent
Myopia caused by object is closely being seen with avoiding eyes from working long hours, and especially makes the myopia of adolescent student.
Assuming that the focal length of human eye is 22.8mm, the normal distance (comfort distance) of eye cornea front surface to retina is 23
~24mm.When eye-observation object 350mm or more apart from when, human eye works in comfort conditions, and works as eye-observation 150mm
When the object of distance, if people's eye muscle does not adjust, distance of the object after eye imaging, apart from eye cornea front surface
For 26.4mm, if not wearing spectacles, the focal length and image forming job that the muscle of human eye has to adjustment eyes are away from if for a long time
Work can cause human eye near-sighted in this state.
Assuming that the coefficient A=5.0E-4 (1/mm of two polynomial free curved surfaces of Alvarez lens2), the material of lens
For PMMA (refractive index 1.5), clear aperture 20mm, as shown in figure 13, sandwich structure are equivalent to two groups of two panels Alvarez
The structure of lens composition, by formula (2) shown in, when the Alvarez lens of centre move down 2mm, equivalent single group two panels
The focal length of Alvarez lens group are as follows:
The focal length of sandwich structure are as follows: f '=f/2=500 (mm)
Corresponding diopter is+200 degree.
The continuous free form surface of phase-compression is humorous diffraction micro structural surface, it is assumed that the phase difference of humorous Difraction surface isThat is m=2；Design wavelength lambda0It is equal with the wavelength X used, and it is equal to 532nm.By formula (4) it is found that its p level
The focal length of imaging are as follows:
Thus formula is just it is found that as p=2, the coke of humorous diffraction Alvarez lens zoom system and Alvarez lens group
Away from equal.The focal length of the 2 levels imaging of Harmonic diffractive lenses group is equal with the focal length of former continuous free form surface Alvarez lens group.
The focal length of humorous diffraction sandwich structure are as follows: f '=f/2=500 (mm)
Corresponding diopter is+200 degree.
When intermediate Alvarez lens move up 2mm, the focal length of equivalent single group two panels Alvarez lens group are as follows:
The focal length of sandwich structure are as follows: f '=f/2=-500 (mm)
Corresponding diopter is -200 degree.
The continuous free form surface of phase-compression is humorous diffraction micro structural surface, it is assumed that the phase difference of humorous Difraction surface isThat is m=2；Design wavelength lambda0It is equal with the wavelength X used, and it is equal to 532nm.By formula (4) it is found that its p level
The focal length of imaging are as follows:
Thus formula is just it is found that as p=2, the coke of humorous diffraction Alvarez lens zoom system and Alvarez lens group
Away from equal.The focal length of the 2 levels imaging of Harmonic diffractive lenses group is equal with the focal length of former continuous free form surface Alvarez lens group.
The focal length of humorous diffraction sandwich structure are as follows: f '=f/2=-500 (mm)
Corresponding diopter is -200 degree.
When putting on the distance of the users of intelligent glasses when observing closer object (such as when reading), on intelligent glasses
It is 200mm that sensor, which detects object with a distance from human eye, and the control circuit on intelligent glasses is according in the driving of this detection range
Between Alvarez eyeglass move down 2.2mm, generate 220 degree of focal power, it is comfortable that the object for making nearby is still imaged on human eye
Distance 24mm position.It avoids human eye because seeing closer object to reach, and makes muscular tone spasm, and cause myopia existing
As.
When intermediate Alvarez lens move down 2.2mm, the focal length of Alvarez lens group are as follows:
Corresponding diopter is 220 degree.
The continuous free form surface of phase-compression is humorous diffraction micro structural surface, it is assumed that the phase difference of humorous Difraction surface isThat is m=2；Design wavelength lambda0It is equal with the wavelength X used, and it is equal to 532nm.By formula (4) it is found that its p level
The focal length of imaging are as follows:
Thus formula is just it is found that as p=2, the coke of humorous diffraction Alvarez lens zoom system and Alvarez lens group
Away from equal.The focal length of the 2 levels imaging of Harmonic diffractive lenses group is equal with the focal length of former continuous free form surface Alvarez lens group.
Claims (6)
1. the humorous diffraction Alvarez zoom intelligent glasses of sandwich style, it is characterised in that: including mirror holder and eyeglass；Eyeglass is all by one
A humorous diffraction Alvarez lens group is constituted, and a humorous diffraction Alvarez lens group is made of three eyeglasses；Each eyeglass is set
There is a humorous diffraction micro structural surface, two, the outside lens of every group of eyeglass are fixed on mirror holder, and form sealing space, intermediate
Lens be fixed on the guide rail of mirror holder by sliding block, intermediate lens are slided along the direction perpendicular to optical axis；The humorous micro- knot of diffraction
Structure surface is obtained by Alvarez lens removal phase difference；
Alvarez lens polynomial equation are as follows:
Wherein, z is two polynomial surface height, and A is multinomial coefficient, and f (x, y) is higher order polynomial；
F (x, y)=b1xy4+b2x3y2+b3x5+b4xy6+b5x3y4+b6x5y2+b7x7+…
Wherein, b1, b2, b3... it is higher order polynomial coefficient；
Generate focal length are as follows:
Wherein, δ is two Alvarez lens combination focal powers, and A is multinomial coefficient, and 2 δ are between two Alvarez lens
The distance of relative movement, n are the Refractive Index of Material of Alvarez lens；
The phase difference of Alvarez lens and the relationship of optical path difference are:
WhereinFor phase difference, λ is wavelength, and Δ δ is optical path difference；
By m times of integer that Alvarez lens removal phase difference is 2 π, remaining part is that the humorous of m times that optical path difference is 2 π spreads out
Penetrate Alvarez lens；m≥2.
2. the humorous diffraction Alvarez zoom intelligent glasses of sandwich style according to claim 1, it is characterised in that: described
Mirror holder front two sides are respectively equipped with one or more range sensors, and the range sensor is connect with control circuit module；
The control circuit module is connect with driving motor, and the driving motor drives sliding block sliding by driving screw thread pair.
3. the humorous diffraction Alvarez zoom intelligent glasses of sandwich style according to claim 1 or 2, it is characterised in that: every group
Two, the outside eyeglass of eyeglass respectively contains a humorous diffraction micro structural surface, and humorous diffraction micro structural surface is located at and intermediate mirror
The adjacent surface of piece, the surface far from intermediate eyeglass are that plane, spherical surface or spherical surface are aspherical；Intermediate eyeglass former and later two
Face is humorous diffraction micro structural surface.
4. the humorous diffraction Alvarez zoom intelligent glasses of sandwich style according to claim 1 or 2, it is characterised in that: every group
Two, the outside eyeglass of eyeglass respectively contains a humorous diffraction micro structural surface, and humorous diffraction micro structural surface is located remotely from centre
The adjacent surface of eyeglass, the adjacent surface with intermediate eyeglass are that plane, spherical surface or spherical surface are aspherical；Before and after intermediate eyeglass
Two faces are humorous diffraction micro structural surface.
5. the humorous diffraction Alvarez zoom intelligent glasses of sandwich style according to claim 1 or 2, it is characterised in that: every group
Two, the outside eyeglass of eyeglass respectively contains a humorous diffraction micro structural surface, one of them humorous diffraction in the eyeglass of two, outside is micro-
Body structure surface is located at the surface adjacent with intermediate eyeglass, another eyeglass is that humorous diffraction is micro- with the separate surface of intermediate eyeglass
Body structure surface；Intermediate former and later two faces of eyeglass are humorous diffraction micro structural surface；The residual surface of two eyeglasses in outside is flat
Face, spherical surface or spherical surface are aspherical.
6. the humorous diffraction Alvarez zoom intelligent glasses of sandwich style according to claim 1 or 2, it is characterised in that: three
The surface of eyeglass is humorous diffraction micro structural surface.
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| CN201821397400.0U CN209417457U (en) | 2018-08-28 | 2018-08-28 | The humorous diffraction Alvarez zoom intelligent glasses of sandwich style |
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| CN201821397400.0U CN209417457U (en) | 2018-08-28 | 2018-08-28 | The humorous diffraction Alvarez zoom intelligent glasses of sandwich style |
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| CN109116580A (en) * | 2018-08-28 | 2019-01-01 | 杭州电子科技大学 | A kind of humorous diffraction Alvarez zoom intelligent glasses of sandwich style |
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