CN106950628B - Double-arc naked-eye 3D imaging grating and preparation method thereof - Google Patents
Double-arc naked-eye 3D imaging grating and preparation method thereof Download PDFInfo
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- CN106950628B CN106950628B CN201710207577.3A CN201710207577A CN106950628B CN 106950628 B CN106950628 B CN 106950628B CN 201710207577 A CN201710207577 A CN 201710207577A CN 106950628 B CN106950628 B CN 106950628B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1842—Gratings for image generation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1847—Manufacturing methods
- G02B5/1852—Manufacturing methods using mechanical means, e.g. ruling with diamond tool, moulding
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1847—Manufacturing methods
- G02B5/1857—Manufacturing methods using exposure or etching means, e.g. holography, photolithography, exposure to electron or ion beams
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Abstract
The invention discloses a double-arc naked eye 3D imaging grating which comprises a double-arc structure, wherein the double-arc structure is continuously and repeatedly arranged on the lower horizontal plane and the upper horizontal plane; the double-arc structure comprises upper convex arcs and lower concave arcs, the endpoints of two adjacent upper convex arcs are superposed and fall on a horizontal plane, the lower concave arc is arranged between the two adjacent upper convex arcs, and the center of the lower concave arc and the superposed endpoint of the two adjacent upper convex arcs are positioned on a vertical straight line; the ratio of the chord length corresponding to the upper convex arc to the chord length corresponding to the lower concave arc is 5:1 to 4: 1. The double-arc naked eye 3D imaging grating has better imaging effect, can realize good naked eye 3D imaging effect, and is more comfortable in appearance; meanwhile, the watching of a plane image cannot be influenced, and the double-arc naked-eye 3D imaging grating is low in manufacturing cost and short in development period, and is a display material particularly suitable for a mobile terminal.
Description
Technical Field
The invention relates to the technical field of naked eye 3D imaging, in particular to a double-arc naked eye 3D imaging grating and a preparation method thereof.
Background
Naked eye 3D, namely, by utilizing the characteristic that two eyes of a person have parallax, a vivid three-dimensional image with space and depth can be obtained under the condition that no auxiliary equipment (such as 3D glasses, helmets and the like) is needed. The naked eye type 3D technology gets rid of the constraint of auxiliary equipment, people can watch three-dimensional images more intuitively, and the technical development of applying the naked eye type 3D to mobile terminal products is faster and faster at present. Currently, naked-eye 3D display materials applied to mobile terminals are generally of two types: the liquid crystal imaging material and the lenticular imaging material are characterized in that when the existing naked eye 3D lenticular imaging material is applied, a straight line is formed at the crossed position of a single lenticular lens and a lenticular lens, the straight line and the lines of pixel points of a liquid crystal screen can interfere with each other to form a certain crosstalk phenomenon, especially when a mobile phone is shaken to watch a plane image, the mobile phone can feel that black light waves roll on the screen, the imaging effect is poor, and a viewer is prone to discomfort.
Disclosure of Invention
The invention aims to provide a double-arc naked eye 3D imaging grating which is good in imaging effect, does not affect the viewing of a plane image and is suitable for a mobile terminal and a preparation method thereof.
In order to solve the technical problem, the invention adopts the following technical scheme:
designing a double-arc naked eye 3D imaging grating, which comprises a double-arc structure with a lower horizontal plane and an upper part which are continuously and repeatedly arranged; the double-arc structure comprises upper convex arcs and lower concave arcs, the end points of two adjacent upper convex arcs are overlapped and fall on the horizontal plane, the lower concave arc is arranged between the two adjacent upper convex arcs, and the centers of the lower concave arcs and the overlapped end points of the two adjacent upper convex arcs are positioned on a vertical straight line; the ratio of the chord length corresponding to the upper convex arc to the chord length corresponding to the lower concave arc is 5:1 to 4: 1.
Preferably, the focal lengths of the upper convex arc and the lower convex arc are the same.
Preferably, the focal distance of the upper convex arc and the lower convex arc is 1-15 mm.
Preferably, the grating is an integrated structure made of UV photosensitive glue, and the refractive index of the UV photosensitive glue is 1.5-1.8.
Preferably, the arc height of the upper convex arc is between 0.0001 and 0.05mm, and the arc height of the lower concave arc is smaller than that of the upper convex arc.
The preparation method of the double-arc naked eye 3D imaging grating comprises the following steps:
(1) Manufacturing a carving tool bit and a grating mold base roller according to the structure of the double-arc naked eye 3D imaging grating, and then carving a grating pattern on the surface of the grating mold base roller by using the carving tool bit;
(2) The grating is manufactured by adopting a normal-temperature cold pressing method: under the condition that cleanliness is required to be less than or equal to 100 levels in a darkroom, a PET film firstly passes through a glue spreader to be coated with UV photosensitive glue for manufacturing the grating, then the UV photosensitive glue is pressed between a grating mold roller and a pressing roller, meanwhile, the UV photosensitive glue for manufacturing the grating is instantly cured through a curing lamp box device, the UV photosensitive glue is cured on a finished product receiving roller through a transmission roller after being cured, and the double-arc naked-eye 3D imaging grating is manufactured.
The invention has the beneficial effects that:
1. the double-arc naked eye 3D imaging grating adopts a double-arc structure which is continuously and repeatedly arranged, smooth transition is realized between two adjacent upper convex arcs through the arranged lower concave arc, so that the intersection of the adjacent upper convex arcs can not form obvious linear shapes, the naked eye 3D imaging material is close to a layer of plane film coated on a liquid crystal screen after being pasted on the liquid crystal screen, and by adopting the grating structure, the crosstalk with the pixel point lines of the liquid crystal screen can be effectively weakened, and the light wave phenomenon when the plane is viewed is improved.
2. The double-arc naked eye 3D imaging grating has better imaging effect, can realize good naked eye 3D imaging effect, and is more comfortable in appearance; meanwhile, the watching of a plane image cannot be influenced, and the double-arc naked-eye 3D imaging grating is low in manufacturing cost and short in development period, and is a display material particularly suitable for a mobile terminal.
Drawings
FIG. 1 is a schematic structural diagram of a dual-arc naked-eye 3D imaging grating according to the present invention;
FIG. 2 is a schematic structural view of an upper convex arc and a lower concave arc;
wherein, 1 is a horizontal plane, 2 is an upper convex arc, and 3 is a lower concave arc.
Detailed Description
The following examples are intended to illustrate the present invention in detail and should not be construed as limiting the scope of the present invention in any way. The instruments and devices referred to in the following examples are conventional instruments and devices unless otherwise specified; the industrial raw materials are all conventional industrial raw materials which are sold on the market if not specifically indicated; the related processing and manufacturing methods are all conventional processing and manufacturing methods unless otherwise specified.
Example 1: a double-arc naked eye 3D imaging grating is shown in figures 1 and 2 and comprises a double-arc structure with a lower horizontal plane 1 and an upper part which are continuously and repeatedly arranged; the double-arc structure comprises an upper convex arc 2 and a lower convex arc 3, the end points of two adjacent upper convex arcs are overlapped and fall on a horizontal plane, the lower convex arc 3 is arranged between the two adjacent upper convex arcs, and the center of the lower convex arc 3 and the overlapped end points of the two adjacent upper convex arcs are positioned on a vertical straight line. The intersection of two adjacent upper convex arcs should form a straight line, the straight line and the lines of the pixel points of the liquid crystal screen can interfere with each other to form a certain crosstalk phenomenon, the imaging effect is greatly influenced, a lower concave arc is arranged at the joint of the two adjacent upper convex arcs, the intersection of the two upper convex arcs can be filled in a concave shape similar to a V shape, the intersection of the two upper convex arcs is enabled to be gentle, the smooth transition between the adjacent upper convex arcs is realized, the straight line can not appear at the intersection of the two upper convex arcs, and the interference of the straight line on the imaging effect is avoided.
Wherein, the ratio of the chord length a corresponding to the upper convex arc 2 to the chord length b corresponding to the lower concave arc 3 is 5:1 to 4: 1. The focal lengths of the upper convex arc 2 and the lower concave arc 3 are the same. The grating is an integrated structure made of UV sensitive glue.
The naked eye 3D display material for the 5.5-inch mobile phone is designed as an example: in this two arc bore hole 3D imaging grating, the chord length a that the epirelief 2 corresponds is 0.126mm, and the chord length that corresponds with concave arc 3 according to the chord length that the epirelief 2 corresponds is 4:1, the chord length b corresponding to the lower concave arc 3 is 0.0315mm; the focal lengths of the upper convex arc 2 and the lower convex arc 3 are the same and are both 1.5mm; the refractive index of the UV photosensitive glue for manufacturing the grating is 1.575; the arc height h1 of the upper convex arc 2 is 0.00370mm, and the arc height h2 of the lower concave arc 3 is 0.00023mm.
The naked eye 3D display material for a 50-inch 4K display is designed as an example: in this two arc bore hole 3D imaging grating, the chord length a that goes up convex arc 2 and correspond is 0.465mm, and the chord length that corresponds with lower concave arc 3 according to the chord length that goes up convex arc 2 corresponds is 5:1, the chord length b corresponding to the lower concave arc 3 is 0.093mm; the focal lengths of the upper convex arc 2 and the lower convex arc 3 are the same and are both 9mm; the refractive index of the UV photosensitive glue for manufacturing the grating is 1.575; the arc height h1 of the upper convex arc 2 is 0.0082mm, and the arc height h2 of the lower concave arc 3 is 0.00031mm.
Example 2: the preparation method of the double-arc naked eye 3D imaging grating comprises the following steps:
(1) Manufacturing a carving tool bit and a grating mold base roller according to the structure of the double-arc naked eye 3D imaging grating, and then carving a grating pattern on the surface of the grating mold base roller by using the carving tool bit;
(2) The grating is manufactured by adopting a normal-temperature cold pressing method: under the condition that cleanliness factor is required to be less than or equal to 100 grades in a darkroom, a PET film firstly passes through a glue spreader, UV photosensitive glue used for manufacturing the grating is coated, then the UV photosensitive glue is pressed between a grating mold roller and a pressing roller, meanwhile, the UV photosensitive glue used for manufacturing the grating is instantly cured through a curing lamp box device, the UV photosensitive glue is cured through a transmission roller after being cured and is received on a finished product receiving roller, and the double-arc naked eye 3D imaging grating is manufactured.
While the present invention has been described in detail with reference to the drawings and the embodiments, those skilled in the art will appreciate that various changes and modifications can be made to the specific parameters in the above embodiments without departing from the spirit of the present invention, and it is intended to cover various embodiments within the scope of the present invention, and detailed descriptions thereof will be omitted.
Claims (5)
1. A double-arc naked eye 3D imaging grating is characterized by comprising a double-arc structure with a lower horizontal plane and an upper part which are continuously and repeatedly arranged; the double-arc structure comprises upper convex arcs and lower concave arcs, the endpoints of two adjacent upper convex arcs are superposed and fall on the horizontal plane, the lower concave arc is arranged between the two adjacent upper convex arcs, and the center of the lower concave arc and the superposed endpoint of the two adjacent upper convex arcs are positioned on a vertical straight line; the ratio of the chord length corresponding to the upper convex arc to the chord length corresponding to the lower concave arc is 5:1 to 4:1, the arc height of the lower concave arc is smaller than that of the upper convex arc; the focal lengths of the upper convex arc and the lower concave arc are the same.
2. The dual arc naked eye 3D imaging grating of claim 1, wherein the focal length of the upper convex arc and the lower concave arc is 1-15 mm.
3. The double-arc naked eye 3D imaging grating as claimed in claim 1, wherein the grating is an integrated structure made of UV (ultraviolet) photosensitive glue, and the refractive index of the UV photosensitive glue is 1.5-1.8.
4. The dual arc naked eye 3D imaging grating of claim 1, wherein the height of the convex upward arc is between 0.0001-0.05 mm.
5. The preparation method of the double-arc naked-eye 3D imaging grating according to claim 1, characterized by comprising the following steps:
(1) Manufacturing a carving tool bit and a grating mold base roller according to the structure of the double-arc naked eye 3D imaging grating, and then carving a grating pattern on the surface of the grating mold base roller by using the carving tool bit;
(2) The grating is manufactured by adopting a normal-temperature cold pressing method: under the condition that cleanliness required in a darkroom is less than or equal to 100 levels, a PET film firstly passes through a glue spreader to be coated with UV photosensitive glue for manufacturing the grating, then the UV photosensitive glue is pressed between a grating mold roller and a pressing roller, meanwhile, the UV photosensitive glue for manufacturing the grating is instantly cured through a curing lamp box device, the UV photosensitive glue is cured on a finished product receiving roller through a transmission roller after being cured, and the double-arc naked-eye 3D imaging grating is manufactured.
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| CN201710207577.3A CN106950628B (en) | 2017-03-31 | 2017-03-31 | Double-arc naked-eye 3D imaging grating and preparation method thereof |
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| CN106950628B true CN106950628B (en) | 2023-04-07 |
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| CN104228074B (en) * | 2013-06-24 | 2016-08-10 | 河南三阳光电有限公司 | Cold pressing the system of colding pressing of lenticulation and the technique of declining |
| CN206609989U (en) * | 2017-03-31 | 2017-11-03 | 河南三阳光电有限公司 | Double arc bore hole 3D Imaging gratings |
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