CN113703173A - Optical device combining eyeglass function and augmented reality device - Google Patents
Optical device combining eyeglass function and augmented reality device Download PDFInfo
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- CN113703173A CN113703173A CN202010431146.7A CN202010431146A CN113703173A CN 113703173 A CN113703173 A CN 113703173A CN 202010431146 A CN202010431146 A CN 202010431146A CN 113703173 A CN113703173 A CN 113703173A
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- optical element
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- augmented reality
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- 230000003287 optical effect Effects 0.000 title claims abstract description 163
- 230000003190 augmentative effect Effects 0.000 title claims abstract description 57
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- 239000012528 membrane Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims 2
- 239000011521 glass Substances 0.000 abstract description 18
- 239000010408 film Substances 0.000 description 27
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 239000011358 absorbing material Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 239000012788 optical film Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
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- 206010020675 Hypermetropia Diseases 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000004305 hyperopia Effects 0.000 description 1
- 201000006318 hyperopia Diseases 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 208000001491 myopia Diseases 0.000 description 1
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- 201000010041 presbyopia Diseases 0.000 description 1
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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
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
-
- 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
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B2027/0178—Eyeglass type
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
The invention provides an optical device combining the functions of glasses and augmented reality, which is suitable for enabling an ambient light beam to be incident to the eyes of a user. The optical device combining the glasses function and the augmented reality function comprises glasses lenses and a diffractive optical element. The eyeglass lens has a first surface facing toward the eye and a second surface facing away from the eye. The diffractive optical element is disposed on the first surface of the eyeglass lens or between the first surface and the second surface of the eyeglass lens, the diffractive optical element having a third surface facing the eye and a fourth surface facing away from the eye, wherein the diffractive optical element is a diffractive optical diaphragm or a diffractive optical plate. An augmented reality device is also presented.
Description
Technical Field
The present invention relates to an optical device and an Augmented Reality (AR) device, and more particularly, to an optical device and an AR device that combine a spectacle function and an AR function.
Background
The augmented reality technology is a technology for integrating information such as visual effect, sound effect and spatial information of a virtual world into real environment information, and not only displays the information of a real environment, but also displays virtual information. The existing augmented reality device has no glasses function, and a user with vision correction requirements can obtain clearer real environment information only by wearing additional correction glasses, so that better visual experience is obtained. In addition, the existing augmented reality device is easily affected by external stray light when used outdoors.
Disclosure of Invention
The present invention is directed to an optical device combining a spectacle function and an augmented reality device, and can provide spectacles having augmented reality effects.
An embodiment of the present invention provides an optical device combining a glasses function and an augmented reality function, which is suitable for making an ambient light beam incident on an eye of a user. The optical device combining the glasses function and the augmented reality function includes a glasses lens and a Diffractive Optical Element (DOE). The eyeglass lens has a first surface facing toward the eye and a second surface facing away from the eye. The diffractive optical element is disposed on the first surface of the eyeglass lens or between the first surface and the second surface of the eyeglass lens, the diffractive optical element having a third surface facing the eye and a fourth surface facing away from the eye, wherein the diffractive optical element is a diffractive optical diaphragm or a diffractive optical plate.
An embodiment of the invention provides an augmented reality device, which includes a spectacle lens, a diffractive optical element and a projector. The eyeglass lens has a first surface facing toward an eye of a user of the augmented reality device and a second surface facing away from the eye. The diffractive optical element is arranged on or in the first surface of the spectacle lens, the diffractive optical element having a third surface facing the eye and a fourth surface facing away from the eye, wherein the diffractive optical element is a diffractive optical diaphragm or a diffractive optical plate. The projector outputs an image beam, and the diffractive optical element is disposed on a transmission path of the image beam and projects the image beam to an eye. Wherein an ambient light beam from the external environment is transmitted to the eye after penetrating the spectacle lens and the diffractive optical element.
In view of the above, in the optical device and the augmented reality device according to the embodiments of the present invention, by combining the diffractive optical element to the eyeglass lens, eyeglasses having augmented reality effects can be provided.
Drawings
FIG. 1 is a schematic cross-sectional view of an optical device and augmented reality device according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of an optical device and augmented reality device according to another embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of an optical device and augmented reality device according to another embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of an optical device according to another embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a shading element of the optical device of the embodiment of FIG. 4;
fig. 6 is a schematic view of a manufacturing apparatus for manufacturing a shading element according to an embodiment of the present invention.
Description of the reference numerals
10. 10a, 10b, 10c optical device
100. 100a, 100b augmented reality device
110 spectacle lens
112 first sub-lens
114 second sub-lens
120 diffractive optical element
120a diffractive optical film
120b diffractive optical plate
120c holographic optical element
130 light-shielding element
130S surface
132 strip-shaped shading structure
133 connecting part
134 base film
134a strip-shaped transparent structure
140 projector
20 manufacturing apparatus
21: film material
22 roller set
22a first roller
22b second roller
22c first auxiliary roller
22d second auxiliary roller
24: die roller
26: glue injection equipment
28 illumination device
30: strip structure
50: eye
Cross section A
H is depth
IL image beam
O is an object
OL real world beam
S1 first surface
S2 second surface
S3 third surface
S3a incident light part
S3b light emergent part
S4 fourth surface
S5 fifth surface
S6 sixth surface
S7 seventh surface
SL stray light beam
W is interval
WL ambient light beam
Detailed Description
Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.
Fig. 1 is a schematic cross-sectional view of an optical device 10 and an augmented reality device 100 according to an embodiment of the invention. Referring to fig. 1, the optical device 10 combining the glasses function and the augmented reality function of the present embodiment includes a glasses lens 110 and a diffractive optical element 120. The eyeglass lens 110 has a first surface S1 facing toward the eye 50 and a second surface S2 facing away from the eye 50. The diffractive optical element 120 is disposed on the first surface S1 of the eyeglass lens 110 or between the first surface S1 and the second surface S2 of the eyeglass lens 110. That is, in the present embodiment, the diffractive optical element 120 may be disposed on one side of the first surface S1 of the eyeglass lens 110 (for example, attached to the first surface S1 of the eyeglass lens 110) or disposed in the eyeglass lens 110. In one embodiment, the diffractive optical element 120 may be in direct contact with the first surface S1 of the eyeglass lens 110, and the diffractive optical element 120 may be directly attached or otherwise bonded to the first surface S1 of the eyeglass lens 110, or the diffractive optical element 120 may be formed directly on the first surface S1 of the eyeglass lens 110, for example. However, in other embodiments, other film layers may be disposed between the diffractive optical element 120 and the first surface S1 of the spectacle lens 110. The diffractive optical element 120 has a third surface S3 facing the eye 50 and a fourth surface S4 facing away from the eye 50. In the present embodiment, the optical device 10 combining the glasses function and the augmented reality function is adapted to make the ambient light WL incident to the eyes 50 of the user, so that the user can see the real world scene through the optical device 10 combining the glasses function and the augmented reality function. By incorporating diffractive optical elements into spectacle lenses, the optical device of the present invention can provide spectacles with augmented reality effects.
Further, the spectacle lens 110 according to the embodiment of the present invention may be a lens for correcting myopia, hyperopia or presbyopia. In addition, the eyeglass lens 110 according to the embodiment of the present invention may have more than two correction functions according to actual requirements. Therefore, the user of the optical device of the invention can not need to wear additional corrective glasses outside the optical device, thereby reducing the burden of the user and improving the use convenience. In addition, the glasses lens 110 can be a plastic lens to improve the safety of the optical device and the augmented reality device of the present invention. The diffractive optical element 120 of the embodiment of the present invention has a diffractive structure (omitted and not shown in the drawings). Specifically, the diffractive optical element 120 may be a diffractive optical membrane or a diffractive optical plate having a diffractive structure. The diffractive optical element 120 is shown as a diffractive optical membrane 120a in the embodiment of fig. 1, but in other embodiments, the diffractive optical element 120 can also be a diffractive optical plate. In the present embodiment, the diffractive optical film 120a is used, which can reduce the manufacturing cost, and the diffractive optical film 120a can also prevent the eye 50 from being damaged when the spectacle lens 110 is broken by impact.
Further, in the present embodiment, the diffractive optical element 120 is configured such that at least a part of the light beam incident from the third surface S3 of the diffractive optical element 120 is totally reflected between the third surface S3 and the fourth surface S4 of the diffractive optical element 120. In this configuration, a part of the diffractive optical element 120 has a light guiding function similar to that of a waveguide element.
FIG. 1 also shows an augmented reality device 100 according to an embodiment of the invention. Referring to fig. 1, the augmented reality device 100 of the present embodiment includes a spectacle lens 110, a diffractive optical element 120, and a projector 140. The eyeglass lens 110 has a first surface S1 facing toward an eye 50 of a user of the augmented reality device 100 and a second surface S2 facing away from the eye 50. The diffractive optical element 120 is disposed on the first surface S1 of the eyeglass lens 110, or between the first surface S1 and the second surface S2 of the eyeglass lens 110. The diffractive optical element 120 has a third surface S3 facing the eye 50 and a fourth surface S4 facing away from the eye 50. The spectacle lens 110 and the diffractive optical element 120 may have a configuration similar to that described above for the optical device 10 combining the spectacle function and the augmented reality function, and are not described herein again. In the present embodiment, the projector 140 outputs the image beam IL, the diffractive optical element 120 is disposed on a transmission path of the image beam IL, and the diffractive optical element 120 projects the image beam IL to the eye 50. That is, the image beam IL output from the projector 140 can be projected to the diffractive optical element 120 and then projected to the eye 50 of the user via the diffractive optical element 120. Thus, the user can see the projected Augmented (Augmented) image picture through the diffractive optical element 120. In addition, the ambient light beam WL from the external environment can be transmitted to the eye 50 after passing through the spectacle lens 110 and the diffractive optical element 120. Therefore, the user can see the real world object through the glasses lens 110 and the diffractive optical element 120 at the same time, so as to combine the augmented image frame and the real world object image to realize the augmented reality device function.
Further, referring to fig. 1, in the present embodiment, the image light beam IL output by the projector 140 is projected to the third surface S3 of the diffractive optical element 120. At least a portion of the image beam IL may penetrate the third surface S3 from the light incident portion S3a of the third surface S3 into the diffractive optical element 120. At least a portion of the image beam IL may be totally reflected between the third surface S3 and the fourth surface S4 of the diffractive optical element 120 after penetrating the third surface S3. At least a part of the image beam IL may be diffracted at least one of the third surface S3 and the fourth surface S4 and projected to the eye 50 through the light exit portion S3b of the third surface S3 after being totally reflected between the third surface S3 and the fourth surface S4 of the diffractive optical element 120. Accordingly, at least a portion of the image beam IL may exit the diffractive optical element 120 through the third surface S3 and be projected to the user' S eye 50. The diffractive optical element 120 is located between the light incident portion S3a and the light exit portion S3b, has a light guiding function similar to that of a waveguide element, and can transmit the image beam IL.
Fig. 2 is a schematic cross-sectional view of an optical device 10a and an augmented reality device 100a according to another embodiment of the present invention. Referring to fig. 2, the optical device 10a and the augmented reality device 100a of the present embodiment are similar to the optical device 10 and the augmented reality device 100 of fig. 1, and the main differences therebetween are as follows. In the present embodiment, the diffractive optical element 120 is a Holographic optical element 120c (HOE). That is, the diffractive optical element 120 is configured to reflectively diffract the light beam incident from the third surface S3 of the diffractive optical element 120 on the third surface S3. In the present embodiment, the image beam IL is projected to the third surface S3 of the diffractive optical element 120. The image beam IL is reflectively diffracted at the third surface S3 of the diffractive optical element 120 and projects at least a portion of the image beam IL to the eye 50.
Fig. 3 is a schematic cross-sectional view of an optical device 10b and an augmented reality device 100b according to another embodiment of the present invention. Referring to fig. 3, the optical device 10b and the augmented reality device 100b of the present embodiment are similar to the optical device 10 and the augmented reality device 100 of fig. 1, and the main differences therebetween are as follows. In the present embodiment, the diffractive optical element 120 is disposed between the first surface S1 and the second surface S2 of the eyeglass lens 110. In the present embodiment, the eyeglass lens 110 may further include a first sub-lens 112 and a second sub-lens 114, and the diffractive optical element 120 is disposed between the first sub-lens 112 and the second sub-lens 114. Specifically, the first sub-lens 112 includes a first surface S1 of the eyeglass lens 110 and a fifth surface S5 facing away from the first surface S1, the second sub-lens 114 includes a second surface S2 of the eyeglass lens 110 and a sixth surface S6 facing away from the second surface S2, and the diffractive optical element 120 is wrapped in the eyeglass lens 110 by respectively attaching the fifth surface S5 of the first sub-lens 112 and the sixth surface S6 of the second sub-lens 114 to the third surface S3 and the fourth surface S4 of the diffractive optical element 120.
The diffractive optical element 120 of the present embodiment is similar to the diffractive optical element 120 shown in fig. 1, 2. The diffractive optical element 120 of the present embodiment may have a configuration similar to the diffractive optical element 120 of the embodiment described above with respect to fig. 1, 2. In the present embodiment, the diffractive optical element 120 is a diffractive optical plate 120 b. In other embodiments, the diffractive optical element 120 can be replaced with a diffractive optical film similar to that shown in fig. 1 and 2.
In the present embodiment, the diffractive optical element 120 may be configured such that at least a portion of the light beam incident from the third surface S3 of the diffractive optical element 120 is totally reflected between the third surface S3 and the fourth surface S4 of the diffractive optical element 120. Referring to fig. 3 again, in the augmented reality device 100b of the embodiment, the image light beam IL output by the projector 140 passes through the first surface S1 of the spectacle lens 110 and is projected to the third surface S3 of the diffractive optical element 120 (the image light beam IL in the first sub-lens 112 is omitted in the schematic diagram of fig. 3). At least a portion of the image beam IL may penetrate the third surface S3 from the light incident portion S3a of the third surface S3 into the diffractive optical element 120. At least a portion of the image beam IL may be totally reflected between the third surface S3 and the fourth surface S4 of the diffractive optical element 120 after penetrating the third surface S3. At least a portion of the image beam IL may be totally reflected between the third surface S3 and the fourth surface S4 of the diffractive optical element 120, and then diffracted at least one of the third surface S3 and the fourth surface S4 and projected to the eye 50 through the light emergent portion S3b of the third surface S3 of the diffractive optical element 120 and the first surface S1 of the eyeglass lens 110 (the image beam IL in the first sub-lens 112 is omitted in the schematic diagram of fig. 3). The diffractive optical element 120 is located between the light incident portion S3a and the light exit portion S3b, has a light guiding function similar to that of a waveguide element, and can transmit the image beam IL.
In other embodiments, the diffractive optical element 120 can also be a holographic optical element, when the image beam IL output by the projector 140 is projected to the third surface S3 of the diffractive optical element 120 through the first surface S1 of the spectacle lens 110, the image beam IL can be reflectively diffracted on the third surface S3 of the diffractive optical element 120, and at least a portion of the image beam IL is projected to the eye 50 through the first surface S1 of the spectacle lens 110.
Fig. 4 is a schematic cross-sectional view of an optical device 10c according to another embodiment of the present invention. Fig. 5 is a schematic cross-sectional view of the light blocking member 130 of the optical device 10c of the embodiment of fig. 4. Referring to fig. 4, the optical device 10c of the present embodiment is similar to the optical device 10 of fig. 1, and the main differences therebetween are as follows. In the present embodiment, the optical device 10c combining the eyeglass function and the augmented reality function further includes the light blocking member 130 disposed on the second surface S2 of the eyeglass lens 110. The light shielding element 130 can be fixed on the second surface S2 of the glasses lens 110 by an attaching method, or the light shielding element 130 can be directly manufactured on the second surface S2 of the glasses lens 110. The light shielding element 130 includes a plurality of strip-shaped light shielding structures 132. As shown in fig. 4, the plurality of light shielding bar structures 132 can absorb or reflect stray light beams SL (e.g., direct solar light beams) from the external environment, but real light beams OL (e.g., light reflected by trees in the field of view of the user) from the object O can be incident on the eyes 50 of the user from the gaps between the plurality of light shielding bar structures 132. By means of the light-shielding element 130, the optical device or augmented reality device of the present invention can shield the stray light beam SL, reduce the stray light entering the user's eye 50, but allow most of the real-world light beam OL to pass through. Therefore, when the optical device or augmented reality device of the present invention is used outdoors, it is less susceptible to external stray light.
In some embodiments, the shading element 130 may further include a base film 134, and the base film 134 is disposed between the strip-shaped shading structure 132 and the second surface S2 of the spectacle lens 110. Referring to fig. 4 and 5, the light shielding element 130 of the present embodiment is a film including a plurality of strip light shielding structures 132, the plurality of strip light shielding structures 132 are disposed on the base film 134, and the base film 134 is attached to the second surface S2 of the glasses lens 110. In some embodiments, the base film 134 may further have a plurality of bar-shaped transparent structures 134a, and the plurality of bar-shaped transparent structures 134a are embedded with the plurality of bar-shaped light shielding structures 132. That is, the plurality of stripe-shaped light shielding structures 132 may be disposed in the grooves formed by the plurality of stripe-shaped transparent structures 134 a. For example, the plurality of bar-shaped transparent structures 134a may be manufactured by, for example, ultraviolet curing, and the plurality of bar-shaped light shielding structures 132 may be formed by filling light absorbing material into the grooves between the adjacent bar-shaped transparent structures 134a after the plurality of bar-shaped transparent structures 134a are formed. As shown in fig. 5, the light shielding element 130 of the present embodiment may have a connecting portion 133 formed of a light absorbing material between adjacent stripe-shaped light shielding structures 132, and the connecting portion 133 has a thinner thickness relative to the stripe-shaped light shielding structures 132, so that the connecting portion 133 does not have a great influence on the light penetration. In other embodiments, the plurality of bar-shaped light shielding structures 132 may also be directly disposed on the surface of the spectacle lens 110, for example, a groove may be formed on the second surface S2 of the spectacle lens 110 and filled with a light absorbing material to form the plurality of bar-shaped light shielding structures 132. Transparent, as used herein, means allowing light to pass through. In the embodiment of the invention, the light transmittance of the strip-shaped transparent structure 134a is higher than that of the strip-shaped light shielding structure 132.
In some embodiments, an additional film (not shown) may be further disposed between the light shielding element 130 and the second surface S2 of the spectacle lens 110, or an additional film (not shown) may be disposed on the seventh surface S7 of the light shielding element 130 opposite to the second surface S2, according to the usage requirement. In the present embodiment, each of the strip-shaped light shielding structures 132 is disposed along a substantially horizontal direction to shield stray light from above, and can block the stray light while maintaining a wide viewing field in the horizontal direction.
In addition, in the present embodiment, the plurality of stripe-shaped light-shielding structures 132 may be made of black light-shielding materials such as black dye. In some embodiments, the light shielding structures 132 can also be made of photochromic material (e.g., material containing silver chloride or other halogen), and can be converted into light shielding material under strong ambient light. The invention is not limited thereto.
Further, in the present embodiment, the plurality of stripe-shaped transparent structures 134a conform to: H/W ≧ 1, where H is the depth of the transparent stripe 134a, and W is the spacing at the bottom of the transparent stripe 134 a. Under this condition, the stripe-shaped light shielding structure 132 has a deeper depth H, and the effect of shielding stray light is good. In addition, the stripe-shaped transparent structure 134a of the present embodiment has a trapezoidal cross section a. In the cross section shown in fig. 5, the cross section a of the stripe-shaped transparent structure 134a is a trapezoid. As will be explained below, providing the cross section a of the stripe-shaped transparent structure 134a as a ladder shape facilitates the fabrication of the base film 134.
Fig. 6 is a schematic diagram of a manufacturing apparatus 20 for manufacturing the shading element 130 according to an embodiment of the present invention. In the present embodiment, the manufacturing apparatus 20 includes a roller set 22, a mold roller 24, a glue injection device 26, and an illumination device 28. The roller group 22 may include a first roller 22a, a second roller 22b, a first auxiliary roller 22c, and a second auxiliary roller 22 d. In the present embodiment, the film 21 is fixed on the first roller and the second roller 22b, wherein the film 21 may be made of any material. In the present embodiment, the film 21 is a light-permeable film. The mold roller 24 may have a plurality of tooth molds, in this embodiment, the tooth molds have a trapezoidal cross section to form a strip structure with a trapezoidal cross section, but the invention is not limited thereto. The tooth die is provided with a trapezoidal cross section, which is beneficial to the subsequent demoulding procedure.
When the manufacturing apparatus 20 of the present embodiment is used to manufacture the base film 134 or the light shielding member 130, the first roller 22a spreads the film 21 and conveys it toward the mold roller 24. The first auxiliary roller 22c sandwiches the film 21 between the first auxiliary roller 22c and the die roller 24, and the second auxiliary roller 22d sandwiches the film 21 between the second auxiliary roller 22d and the die roller 24. The glue injection device 26 injects the glue between the film 21 and the mold roller 24. The light irradiation device 28 may be disposed on a side of the film 21 opposite to the mold roller 24, and when the film 21 passes through the light irradiation device 28, the light irradiation device 28 may emit a light beam to cure the adhesive material injected between the film 21 and the mold roller 24, so as to form a strip structure 30 corresponding to the shape of the tooth mold on the film 21. In the embodiment, the adhesive material may be, for example, an ultraviolet light curing material, and the illumination device 28 may be, for example, an ultraviolet lamp, but the invention is not limited thereto. After the strip-shaped structure 30 is solidified, the second roller 22b rolls and retracts the finished strip-shaped structure 30 together with the film 21. Fig. 6 shows the finished strip-shaped structure 30, and the strip-shaped structure 30 can be used as a plurality of strip-shaped transparent structures 134a of the base film 134. In some embodiments, the light absorbing material may be filled in the plurality of grooves between the bar structures 30 before rolling, which is not limited by the invention.
As described above, in the optical device and the augmented reality device according to the embodiments of the present invention, by combining the diffractive optical element to the eyeglass lens, eyeglasses having augmented reality effects can be provided. In addition, in some embodiments, the optical device and the augmented reality device of the present invention may be configured with a light shielding element to shield stray light and improve the experience of use.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (13)
1. An optical device combining eyewear functionality with augmented reality functionality adapted to direct an ambient light beam to a user's eye, the optical device comprising:
an eyeglass lens having a first surface facing toward the eye and a second surface facing away from the eye; and
a diffractive optical element disposed on the first surface of the eyeglass lens or between the first surface and the second surface of the eyeglass lens, the diffractive optical element having a third surface facing the eye and a fourth surface facing away from the eye, wherein the diffractive optical element is a diffractive optical diaphragm or a diffractive optical plate.
2. The optical device of claim 1, wherein the eyewear lens comprises a first sub-lens and a second sub-lens, and the diffractive optical element is disposed between the first sub-lens and the second sub-lens.
3. The optical device according to claim 1, wherein the diffractive optical element is configured to cause total reflection of at least a portion of the light beam incident from the third surface of the diffractive optical element between the third surface and the fourth surface of the diffractive optical element.
4. The optical device of claim 1, further comprising a shading element disposed on the second surface of the eyeglass lens, the shading element comprising a plurality of strip-shaped shading structures.
5. The optical device according to claim 4, wherein the light shielding element further comprises a substrate film disposed between the plurality of light shielding structures and the second surface of the eyeglass lens, and the substrate film has a plurality of transparent strip structures embedded therein, and the transparent strip structures have a trapezoidal cross section.
6. The optical device of claim 5, wherein the plurality of strip-shaped transparent structures conform to: H/W ≧ 1, where H is a depth of the plurality of bar-shaped transparent structures, and W is an interval at the bottom of the plurality of bar-shaped transparent structures.
7. An augmented reality device, comprising:
an eyeglass lens having a first surface facing towards an eye of a user of the augmented reality device and a second surface facing away from the eye;
a diffractive optical element disposed on the first surface of the eyeglass lens or between the first surface and the second surface of the eyeglass lens, the diffractive optical element having a third surface facing the eye and a fourth surface facing away from the eye, wherein the diffractive optical element is a diffractive optical diaphragm or a diffractive optical plate; and
a projector that outputs an image light beam, the diffractive optical element being disposed on a transmission path of the image light beam, the diffractive optical element projecting the image light beam to the eye;
wherein an ambient light beam from an external environment is transmitted to the eye after penetrating the spectacle lens and the diffractive optical element.
8. The augmented reality device of claim 7, wherein the image beam is projected to the third surface of the diffractive optical element; wherein at least a portion of the image beam is totally reflected between the third surface and the fourth surface of the diffractive optical element after penetrating the third surface, and wherein at least a portion of the image beam is diffracted at least one of the third surface and the fourth surface and projected through the third surface to the eye after totally reflecting between the third surface and the fourth surface of the diffractive optical element.
9. The augmented reality device of claim 7, wherein the image beam is projected to the third surface of the diffractive optical element; the image beam is reflectively diffracted on the third surface of the diffractive optical element and projects at least a portion of the image beam to the eye.
10. The augmented reality device of claim 7, wherein the eyeglass lens comprises a first sub-lens and a second sub-lens, the diffractive optical element being disposed between the first sub-lens and the second sub-lens.
11. The augmented reality device of claim 7, further comprising a shading element disposed on the second surface of the eyeglass lens, the shading element comprising a plurality of strip shading structures.
12. The augmented reality device of claim 11, wherein the light blocking element further comprises a base membrane disposed between the plurality of strip light blocking structures and the second surface of the eyeglass lens, and the base membrane has a plurality of strip transparent structures that are embedded with the plurality of strip light blocking structures, and the plurality of strip transparent structures have a trapezoidal cross section.
13. The augmented reality device of claim 12, wherein the plurality of striped transparent structures conform to: H/W ≧ 1, where H is a depth of the plurality of bar-shaped transparent structures, and W is an interval at the bottom of the plurality of bar-shaped transparent structures.
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