CN110515215A - A kind of ultra thin optical mould group and ultra-thin display device - Google Patents
A kind of ultra thin optical mould group and ultra-thin display device Download PDFInfo
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- CN110515215A CN110515215A CN201910925736.2A CN201910925736A CN110515215A CN 110515215 A CN110515215 A CN 110515215A CN 201910925736 A CN201910925736 A CN 201910925736A CN 110515215 A CN110515215 A CN 110515215A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 31
- 239000000758 substrate Substances 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 14
- 206010010071 Coma Diseases 0.000 claims abstract description 12
- 206010073261 Ovarian theca cell tumour Diseases 0.000 claims abstract description 7
- 208000001644 thecoma Diseases 0.000 claims abstract description 7
- 239000002061 nanopillar Substances 0.000 claims description 39
- 230000000737 periodic effect Effects 0.000 claims description 7
- 238000003384 imaging method Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002050 diffraction method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/4205—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive optical element [DOE] contributing to image formation, e.g. whereby modulation transfer function MTF or optical aberrations are relevant
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/4205—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive optical element [DOE] contributing to image formation, e.g. whereby modulation transfer function MTF or optical aberrations are relevant
- G02B27/4211—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive optical element [DOE] contributing to image formation, e.g. whereby modulation transfer function MTF or optical aberrations are relevant correcting chromatic aberrations
Abstract
The present invention discloses a kind of ultra thin optical mould group and ultra-thin display device, and ultra thin optical mould group includes: transparent substrates, set on the transparent substrates any surface the first surpasses surface, the second surpasses surface set on another surface of the transparent substrates；Light focusing from elementary area can be converged and be imaged with lens function by the surface that the first surpasses；The surface that the second surpasses is with coma correcting function, for eliminating the coma of the light, promotion display effect.The present invention is by being respectively set the super surface texture with different function in the two sides of the transparent substrates, it can be realized ultrashort burnt imaging, system length is effectively reduced, while the coma that can also eliminate big field angle light influences, the portability and display effect of lifting system.
Description
Technical field
The present invention relates to display equipment technical field more particularly to a kind of ultra thin optical mould groups and ultra-thin display device.
Background technique
Instantly VR/AR shows the image that amplification is usually realized using the combination of lens group and display screen, in order to subtract
Mini system volume improves portability, also there is using Fresnel Lenses the scheme for replacing ordinary lens.But Fresnel Lenses skill
The finite volume that art can reduce, and there are multiple steps for its structure, are not planarization structure.Utilize diffraction optical element
(DOE, Diffractive Optical Elements) can realize Light Modulation in a planar structure, can be as far as possible
Ground reduces system bulk, promotes the comfort level for wearing VR/AR equipment.
Diffraction optical element, usually just for lesser spectral region and angular range, therefore when in use can in design
There are color difference and coma, for a VR/AR display system, it would be desirable to and tri- color of RGB all has good display effect, and
With biggish field angle and enlargement ratio.Using diffraction method, single structure is difficult to meet such demand.
Therefore, prior art Shortcomings need to improve.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of ultra thin optical mould group and ultra-thin display device.
Technical scheme is as follows: providing a kind of ultra thin optical mould group, comprising: transparent substrates are set to the light transmission
Substrate any surface the first surpasses surface, the second surpasses surface set on another surface of the transparent substrates；
The surface that the first surpasses is imaged with lens function for that will converge from the light focusing of elementary area；
The surface that the second surpasses is with coma correcting function, for eliminating the coma of the light, promotion display effect.
Further, described the first to surpass multiple microstructure units that surface includes periodic arrangement；It is described the second to surpass surface
Multiple microstructure units including periodic arrangement.
Further, multiple microstructure units in an arrangement period are used to carry out phase tune to single wavelength light
System；Or,
Multiple microstructure units in one arrangement period are used to carry out phase-modulation, Duo Gesuo to multi-wavelength's light
Microstructure unit is stated with different characteristic size.
Further, the microstructure unit is cylindrical body nano-pillar or the microstructure unit is cuboid nano-pillar.
Further, a characteristic parameter of a microstructure unit corresponds to identical wavelength light or different wavelengths of light
One phase-modulation passes through the different characteristic of the cylindrical body nano-pillar when the microstructure unit is cylindrical body nano-pillar
Size is to form different characteristic parameters；When the microstructure unit is cuboid nano-pillar, pass through the cuboid nanometer
The different characteristic size and/or different rotary angle of column are to form different characteristic parameters.
Further, the characteristic size difference of the cylindrical body nano-pillar includes:
The diameter difference of the cylindrical body nano-pillar or the height of the cylindrical body nano-pillar are different.
Further, when the microstructure unit is cuboid nano-pillar, the characteristic size of the cuboid nano-pillar
Within the scope of 50nm~1um.
Further, the characteristic parameter of a microstructure unit corresponds to one of identical wavelength light or different wavelengths of light
Phase-modulation, the expression formula of the corresponding phase modulation function of the microstructure unit are as follows:
For phase-modulation degree, λ is wavelength, and f is the focal length of lens, and r is the radical length under polar coordinates.
Further, the transparent substrates close to described image unit side surface setting it is described the first surpass surface,
Described the second surpass surface far from the surface setting of described image unit side in the transparent substrates.
The present invention also provides a kind of ultra-thin display device, including elementary area and ultra thin optical mould group as described above, institutes
Elementary area is stated to be oppositely arranged with the ultra thin optical mould group.
Using the above scheme, the present invention is super with different function by being respectively set in the two sides of the transparent substrates
Surface texture can be realized ultrashort burnt imaging, system length be effectively reduced, while can also eliminate the coma of big field angle light
It influences, the portability and display effect of lifting system.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the ultra-thin display device of the present invention；
Fig. 2 is the structural schematic diagram of one embodiment of microstructure unit of the present invention；
Fig. 3 is the structural schematic diagram of another embodiment of microstructure unit of the present invention；
Fig. 4 is the top view of one embodiment of microstructure unit of the present invention；
Fig. 5 is the side view of one embodiment of microstructure unit of the present invention；
Fig. 6 is the graph of relation of radius and phase-modulation in one embodiment of the invention；
Fig. 7 is the rotation angle schematic diagram of microstructure unit in one embodiment of the invention；
Fig. 8 is the structural schematic diagram for one embodiment of microstructure unit that the present invention has three color phase-modulations；
Fig. 9 is the structural schematic diagram for another embodiment of microstructure unit that the present invention has three color phase-modulations；
Figure 10 is the optical path effect diagram before coma correction；
Figure 11 is the optical path effect diagram after coma correction.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Before the embodiments of the invention are explained in detail, first the definition on " super surface " is illustrated.Super surface is diffraction
One kind of optical element (DOE), it can realize the phase-modulation of light by planar structure, can greatly reduce optics member
The volume of part.In the following, the contents of the present invention will be described in detail by specific embodiment.
Referring to Fig. 1, the present invention provides a kind of ultra-thin display device and ultra thin optical mould group, ultra-thin display device includes figure
As unit 5 and ultra thin optical mould group, elementary area 5 are oppositely arranged with ultra thin optical mould group, specifically, the display device can be with
It is AR display device, is also possible to VR display device.
Ultra thin optical mould group specifically includes: transparent substrates 1 the first surpass surface set on 1 any surface of transparent substrates
2, and the second surpass surface 3 set on another surface of the transparent substrates 1.The surface 2 that the first surpasses can be incited somebody to action with lens function
Light focusing from elementary area converges imaging, and the lens made in this way can have biggish numerical aperture
(NA), therefore system length can be effectively reduced, promotes portability；The second surpass surface 3 with coma correcting function, for eliminating
The coma of above-mentioned light promotes display effect.
As shown in Figure 1, in one embodiment, being arranged first close to the surface of the side of elementary area 5 in transparent substrates 1
Super surface 2, surface setting of the transparent substrates 1 far from 5 side of elementary area is described the second to surpass surface 3.Certainly, the first surpass surface 2
It can also be exchanged with the setting position for the second surpassing surface 3.
The embodiment of the present invention by the way that the super surface texture with different function is respectively set in the two sides of transparent substrates 1,
It can be realized ultrashort burnt imaging, system length be effectively reduced, while the coma that can also eliminate big field angle light influences, and is promoted
The portability and display effect of system.
Fig. 2 to Fig. 5 is please referred to, super surface specifically can be by multiple microstructure unit groups of the periodic arrangement in plane
At.In one arrangement period, including multiple microstructure units.Multiple microstructure unit can be used for carrying out single wavelength light
Phase-modulation carries out phase-modulation to monochromatic light, can be used for carrying out phase-modulation to multi-wavelength's light, i.e., to polychromatic light
Carry out phase-modulation.The material of microstructure unit may include: Si, a-Si, TiO2, SiO2Deng.
Microstructure unit distinguishes different phase tune particular by different characteristic parameters when carrying out phase-modulation
System, i other words, a characteristic parameter of each microstructure unit can correspond to a phase-modulation of single wavelength light,
A phase-modulation of certain wavelength light in multi-wavelength's light can be corresponded to.According to the different form of microstructure unit (for cylinder
Body nano-pillar or cuboid nano-pillar), different characteristic parameters can be determined by rotation angle or characteristic size, in detail will
It is described below.In an arrangement period, each microstructure unit all has different phase-modulation degree, passes through plane
The microstructure unit of arrangement different characteristic parameter can realize the function of lens or other optical elements (such as coma correction mirror).
The lens made by means of which, can break through the limitation (material, face type etc.) of ordinary lens, and under identical bore, focal length can
To be less than ordinary lens, to reduce the total length of optical system.
In the specific implementation, the first surpass multiple microstructure units 41 that surface 2 includes periodic arrangement, it is described the second to surpass surface
3 include multiple microstructure units 41 of periodic arrangement.As shown in figure 3, in an arrangement period, including multiple micro-structure lists
Member 41.It include multiple multiple microstructure units arranged in the way of arrangement period on the super surface of the first or second.
In embodiments of the present invention, the appearance form of microstructure unit 41 can be cylindrical body nano-pillar (as shown in Figure 3),
May be cuboid nano-pillar (as shown in Figure 2).Because a characteristic parameter of a microstructure unit can correspond to identical
One phase-modulation of wavelength light or different wavelengths of light, therefore when carrying out phase-modulation, particular by microstructure unit
Different characteristic parameter (size, rotation angle) distinguishes different phase-modulation degree.The appearance form of microstructure unit 41 is different
Sample, corresponding characteristic parameter, which distinguishes mode, certain difference.
Specifically, when microstructure unit 41 is cylindrical body nano-pillar, since cylinder is centrosymmetric structure, only
Different characteristic parameters (as shown in Figure 3), the circle of different characteristic size can be characterized by the characteristic size of cylindrical body nano-pillar
Cylinder nano-pillar characterizes different characteristic parameters, and then corresponding different phase-modulation degree.Specifically, the spy of cylindrical body nano-pillar
Sign size includes the diameter and height of cylindrical body nano-pillar；For example, the different-diameter or different height of cylindrical body nano-pillar can be passed through
It spends to characterize the microstructure unit of different characteristic parameter.The diameter range of cylindrical body nano-pillar is in 100 nanometer level.
When microstructure unit 41 is cuboid nano-pillar, since cuboid nano-pillar is non-centrosymmetric structure,
When characterizing different characteristic parameter, rotation angle and/or characteristic size can be selected.Such as, using different characteristic size and/or not
It is characterized different characteristic parameters (as shown in Fig. 2, Fig. 4 and Fig. 5) with the cuboid nano-pillar of rotation angle, and then corresponding different
Phase-modulation degree.It should be noted that the characteristic size (length) of cuboid nano-pillar is usually wavelength magnitude, it is minimum
Size is about 50nm or so, and full-size is no more than 1um, and the cell period is no more than 1um.
Specifically, in one embodiment, by the rotation of the cuboid nano-pillar of identical size come phase modulation.Exist
The characteristic size of the microstructure unit 41 in one arrangement period is identical (height is identical, cross sectional dimensions is identical), but revolves
Gyration θ is different, by the rotation angle, θ of the microstructure unit 41 in one arrangement period of change come phase modulation, such as
Shown in Fig. 7, the rotation angle, θ is the angle that the length direction of the cross section of cuboid nano-pillar is rotated through by X axis Y direction
Degree.
Specifically, the cell period of microstructure unit 41 described in the present embodiment is no more than 1um.With cuboid nanometer
For column, under the above conditions, the characteristic size of the microstructure unit 41 controls micro- knot within the scope of 50nm~1um
The adjustable phase of rotation angle, θ of structure unit 41 carries out micro-structure list by the phase-structure corresponding relationship being hereinafter described
The focusing effect of lens can be realized in the arrangement of member.
It is already mentioned above, microstructure unit comes area when carrying out phase-modulation, particular by different characteristic parameters
Divide different phase-modulation degree, i other words, a characteristic parameter of each microstructure unit can correspond to single wavelength light
One phase-modulation can also correspond to a phase-modulation of certain wavelength light in multi-wavelength's light.
When determining the arrangement mode of microstructure unit 41, for monochromatic light, the corresponding phase-modulation of microstructure unit 41
The expression formula of function are as follows:
For phase-modulation degree, λ is wavelength, and f is the focal length of lens, and r is the radical length under polar coordinates.It follows that
As long as determining the phase modulation function of entire super surface face type, it will be able to determine the arrangement architecture of corresponding microstructure unit,
Realize the monochromatic light optics modulation effect of planarization.Therefore, the first surpass surface 2 by adjusting described and described the second surpass surface 3
On the microstructure unit 41 phase-modulation degree, to obtain lens function and coma correcting function respectively.
The case where being cylindrical body nano-pillar for microstructure unit 41, by taking monochromatic wavelength 660nm as an example, it is assumed that cylindrical body
The height of nano-pillar is determined as 615nm, and the radius of cylindrical body is related with phase-modulation, and abscissa is cylindrical radius, and ordinate is
Phase-modulation, when radius changes to 150nm from 70nm, which has the phase-modulation (as shown in Figure 6) of ± 0.8 π.For
The case where microstructure unit 41 is long square column, phase-modulation depends on the rotation angle, θ of pillar, specifically, in above-mentioned item
Under part, phase-modulation degreeEqual to the rotation angle, θ (as shown in Figure 7) of twice of microstructure unit.
As it was noted above, multiple microstructure units in an arrangement period can carry out phase tune to single wavelength light
System, but it is directed to monochromatic light, wave-length coverage and angular range are all smaller at work for optics module.In order to promote display
It can, it is desirable to which multiple microstructure units in an arrangement period can carry out phase-modulation to multi-wavelength's light.For example, it is desirable to one
Multiple microstructure units in a arrangement period can be modulated RGB three coloured light.At this point, design method and monochromatic light method
It is similar.
When specific design, because needing to carry out RGB three coloured light phase-modulation simultaneously, consideration passes through different features
Size modulates the phase of different color of light.I other words when carrying out phase-modulation to polychromatic light, in an arrangement period
Multiple microstructure units must have different characteristic size.For example, it is desired to phase-modulation be carried out to RGB three coloured light, true
After the characteristic size of fixed each middle color of light, RGB three coloured light can be directed to according to the monochromatic design method described above
It is designed out the arrangement architecture of each monochromatic microstructure unit respectively, then carries out special arrangement, forms such as Fig. 8, Fig. 9
Shown in structure.In Fig. 8, Fig. 9, due to having different characteristics size, to feux rouges R, only corresponding R-portion for RGB
Structure plays phase-modulation, and green light G, blue light B are also similarly.Thus, so that it may integrate three wave bands in a plane
Lens, promote colored display quality.
Figure 10 and Figure 11 are please referred to, the surface 3 that the second surpasses equally can adjust the micro-structure list using aforesaid way
The phase-modulation degree of member 41 realizes coma correcting function.Emulate to obtain by Zemax, be added it is described the second surpass surface 3 it
Afterwards, preferable coma rectification effect can be obtained.It can be seen that the display after correction is imitated from the comparison diagram of coma correction front and back
Fruit is effectively promoted.
It is tied in conclusion the super surface with different function is respectively set by the two sides in transparent substrates in the present invention
Structure can also meet tri- color of RGB and show, and eliminate the intelligent of big field angle light while realizing ultrashort burnt imaging
Difference influences, and system length is effectively reduced, and promotes portability and display effect.
The above is merely preferred embodiments of the present invention, be not intended to restrict the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (10)
1. a kind of ultra thin optical mould group characterized by comprising transparent substrates, set on the of the transparent substrates any surface
One surpass surface, the second surpasses surface set on another surface of the transparent substrates；
The surface that the first surpasses is imaged with lens function for that will converge from the light focusing of elementary area；
The surface that the second surpasses is with coma correcting function, for eliminating the coma of the light, promotion display effect.
2. ultra thin optical mould group according to claim 1, which is characterized in that the surface that the first surpasses includes periodic arrangement
Multiple microstructure units；It is described the second to surpass multiple microstructure units that surface includes periodic arrangement.
3. ultra thin optical mould group according to claim 2, which is characterized in that multiple micro- knots in an arrangement period
Structure unit is used to carry out phase-modulation to single wavelength light；Or,
Multiple microstructure units in one arrangement period are used to carry out phase-modulation to multi-wavelength's light, multiple described micro-
Structural unit has different characteristic size.
4. ultra thin optical mould group according to claim 3, which is characterized in that the microstructure unit is cylindrical body nanometer
Column or the microstructure unit are cuboid nano-pillar.
5. ultra thin optical mould group according to claim 4, which is characterized in that a feature of a microstructure unit
Parameter corresponds to a phase-modulation of identical wavelength light or different wavelengths of light, when the microstructure unit is cylindrical body nano-pillar
When, by the different characteristic size of the cylindrical body nano-pillar to form different characteristic parameters；When the microstructure unit is
When cuboid nano-pillar, by the different characteristic size and/or different rotary angle of the cuboid nano-pillar to form difference
Characteristic parameter.
6. ultra thin optical mould group according to claim 5, which is characterized in that the characteristic size of the cylindrical body nano-pillar is not
Together, comprising: the diameter difference of the cylindrical body nano-pillar or the height of the cylindrical body nano-pillar are different.
7. ultra thin optical mould group according to claim 4 or 5, which is characterized in that when the microstructure unit is cuboid
When nano-pillar, the characteristic size of the cuboid nano-pillar is within the scope of 50nm~1um.
8. ultra thin optical mould group according to any one of claim 3 to 6, which is characterized in that a micro-structure list
The characteristic parameter of member corresponds to a phase-modulation of identical wavelength light or different wavelengths of light, and a microstructure unit is corresponding
The expression formula of phase modulation function are as follows:
The arrangement mode of multiple microstructure units is determined by the phase modulation function in one arrangement period
's；For phase-modulation degree, λ is wavelength, and f is the focal length of lens, and r is the radical length under polar coordinates.
9. ultra thin optical mould group according to claim 1, which is characterized in that in the transparent substrates close to described image list
The surface setting of first side is described the first to surpass surface, and institute is arranged far from the surface of described image unit side in the transparent substrates
It states and the second surpasses surface.
10. a kind of ultra-thin display device, which is characterized in that including surpassing described in elementary area and any one of claims 1 to 9
Thin optics module, described image unit are oppositely arranged with the ultra thin optical mould group.
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| CN112083519A (en) * | 2020-08-24 | 2020-12-15 | 南京理工大学 | Double-layer super-surface coma-aberration-eliminating imaging lens suitable for unmanned aerial vehicle moving shooting |
| CN112684522A (en) * | 2020-11-26 | 2021-04-20 | 中国科学院上海微系统与信息技术研究所 | Ultraviolet and visible light common-lens double-light-path imaging detection system and manufacturing method thereof |
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| CN112684522A (en) * | 2020-11-26 | 2021-04-20 | 中国科学院上海微系统与信息技术研究所 | Ultraviolet and visible light common-lens double-light-path imaging detection system and manufacturing method thereof |
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| CN114252991A (en) * | 2022-01-10 | 2022-03-29 | 东南大学 | Super-surface micro-nano near-to-eye display based on retina display |
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