CN114326104B - Augmented reality glasses with structured light detection function - Google Patents
Augmented reality glasses with structured light detection function Download PDFInfo
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- CN114326104B CN114326104B CN202011041233.8A CN202011041233A CN114326104B CN 114326104 B CN114326104 B CN 114326104B CN 202011041233 A CN202011041233 A CN 202011041233A CN 114326104 B CN114326104 B CN 114326104B
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Abstract
The invention provides an augmented reality glasses with a structured light detection function, which comprises a laser projector, a glasses lens, at least one first diffraction optical element film, an invisible light camera and a second diffraction optical element film. The laser projector is used for emitting at least one invisible light beam and an image light beam. The at least one first diffractive optical element film is disposed on the eyeglass lens. The first diffraction optical element is used for diffracting the invisible light beam into a structural light beam, wherein the structural light beam is transmitted to the object to be detected so as to form a light pattern on the object to be detected. The invisible light camera is used for shooting a light pattern on an object to be detected. The second diffractive optical element film is disposed on the eyeglass lens, and the second diffractive optical element film is used for transmitting the image light beam to eyes.
Description
Technical Field
The present invention relates to augmented reality displays, and more particularly to augmented reality glasses with structured light detection.
Background
With the progress of display technology, virtual reality (virtual reality) display technology and augmented reality (augmented reality) display technology are becoming popular and are being fully studied and developed. The virtual reality display technology allows a user to be immersed in a virtual world displayed on a display, and can display images with stereoscopic impression. The augmented reality display technology enables a user to see an image of a virtual world and also see an object of a real world, and even enables the image of the virtual world and the object of the real world to achieve an interactive effect.
When the display provides an image (i.e. virtual image) of the virtual world to the eyes of the user, if the system can know the position and rotation angle of the eyes, the corresponding virtual image can be provided, and a better display effect can be achieved. However, when the eye tracker is added to the augmented reality display device, the number of components is too large, and the system is too complex.
Disclosure of Invention
The present invention is directed to an augmented reality glasses with structured light detection that integrates a light source of structured light into a laser projector for displaying images, thus having a simpler architecture and a smaller number of elements.
An embodiment of the present invention provides augmented reality glasses with structured light detection function, which is suitable for wearing in front of eyes. The augmented reality glasses with structured light detection function include a laser projector, a glasses lens, at least a first diffractive optical element (diffractive optical element, DOE) film, an invisible light camera, and a second diffractive optical element film. The laser projector is used for emitting at least one invisible light beam and one image light beam, and the eyeglass lens is configured on the paths of the invisible light beam and the image light beam. The at least one first diffractive optical element film is disposed on the eyeglass lens and is located on the path of the invisible light beam. The first diffraction optical element is used for diffracting the invisible light beam into a structural light beam, wherein the structural light beam is transmitted to the object to be detected so as to form a light pattern on the object to be detected. The invisible light camera is used for shooting a light pattern on an object to be detected. The second diffractive optical element film is disposed on the eyeglass lens and located on the path of the image beam, and the second diffractive optical element film is used for transmitting the image beam to the eyes.
In the augmented reality glasses with the structured light detection function according to the embodiments of the present invention, the laser projector emits an invisible light beam in addition to the image light beam, and the invisible light beam forms a structured light beam by the diffraction action of the first diffractive optical element, which is used for detecting the object to be detected. That is, the embodiment of the invention integrates the light source of the structured light into the laser projector for displaying the image, so that the augmented reality glasses with the structured light detection function can have a simpler architecture and a smaller number of elements, and simultaneously achieve the functions of displaying the image and detecting the object to be detected.
Drawings
FIG. 1 is a schematic diagram of an optical path of an augmented reality glasses with structured light detection according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the optical path of the laser projector of FIG. 1;
FIG. 3 is a schematic illustration of the structured light beam of FIG. 1 forming a light pattern on an eye;
FIG. 4 shows the scan paths and positions of the red, green, blue and infrared beams of FIG. 2 on an eyeglass lens;
FIG. 5 is a schematic perspective view of one embodiment of the first diffractive optical element film of FIG. 1;
FIG. 6 is a schematic perspective view of another embodiment of the first diffractive optical element of FIG. 1;
FIG. 7 is a schematic diagram of an optical path of an augmented reality glasses with structured light detection according to another embodiment of the present invention;
FIG. 8 is a schematic front view of the eyeglass lens of FIG. 7 as seen from the eye's line of sight;
FIG. 9 is a schematic diagram of the optical path of the laser projector of FIG. 7;
FIG. 10 is a schematic front view of an ophthalmic lens of an augmented reality glasses with structured light detection function according to another embodiment, as viewed from the eye's line of sight;
FIG. 11 is a schematic front view of an ophthalmic lens of an augmented reality glasses with structured light detection function according to yet another embodiment, as viewed from the eye's line of sight;
fig. 12 is a schematic view of an optical path of an augmented reality glasses with a structured light detection function according to still another embodiment of the present invention.
Description of the reference numerals
50 eyes
60 external object
100. 100b, 100d amplification reality glasses with structured light detection function
110 spectacle lens
112 surface
120. 120a, 120b, 120c, 120d, 124b, 124c, 126b, 126c, 128c, 129c, first diffractive optical element film
122. 122a microstructure
130 invisible light camera
140 second diffractive optical element film
150 spectacle frame
160 processor
200 laser projector
201 light pattern
202. 202b, 2021, 2022, invisible light beams
202': infrared beam
203 structured light beam
204 image beam
210 infrared light laser source
220 laser source
221 red light beam
222 Red laser source
223 green beam
224 green laser source
225 blue light beam
226 blue laser source
230 light combining module
232. 234, 236 dichroic mirror
240 scanning mirror
I1 light spot
I2 Red light scanning Path
I3 green light scanning path
I4 blue light scanning path
Detailed Description
Reference will now be made in detail to the exemplary embodiments of the present 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 light path diagram of an augmented reality glasses with a structured light detection function according to an embodiment of the invention, fig. 2 is a schematic light path diagram of a laser projector in fig. 1, and fig. 3 is a schematic diagram of a structured light beam forming a glazing pattern on an eye in fig. 1. Referring to fig. 1 to 3, the augmented reality glasses 100 with structured light detection function of the present embodiment are suitable for wearing in front of the eyes 50, and the augmented reality glasses 100 with structured light detection function includes a laser projector 200, a glasses lens 110, at least one first diffractive optical element film 120 (a first diffractive optical element film 120 is taken as an example in fig. 1), an invisible light camera 130 and a second diffractive optical element film 140. The laser projector 200 is configured to emit at least one invisible light beam 202 (in fig. 1, an invisible light beam 202 is taken as an example) and an image light beam 204, and the glasses lens 110 is configured on the paths of the invisible light beam 202 and the image light beam 204. The first diffractive optical element film 120 is disposed on the eyeglass lens 110 and is located on the path of the invisible light beam 202. The first diffractive optical element 120 is configured to diffract the invisible light beam 202 into a structural light beam 203, for example, a reflective diffraction, wherein the structural light beam 203 is transmitted to the object to be tested to form a light pattern on the object to be tested. In the present embodiment, the object to be measured is the eye 50, and the structured light beam 203 forms the light pattern 201 on the eye 50.
The invisible light camera 130 is used for shooting a light pattern 201 on an object to be measured. The second diffractive optical element film 140 is disposed on the spectacle lens 110 and is located on the path of the image beam 204, and the second diffractive optical element film 140 is used for transmitting the image beam 204 to the eye 50, for example, diffracting the image beam to the eye 50, so that the eye 50 sees an image frame to be displayed by the laser projector 200, which is presented as a virtual image located in front of the eye 50. The diffraction of the image beam 204 by the second diffractive optical element film 140 is, for example, reflection diffraction. In addition, in the present embodiment, the first diffractive optical element film 120 and the second diffractive optical element film 140 are disposed on the surface 112 of the spectacle lens 110 facing the eye 50. The second diffractive optical element film 140 may be a general diffractive optical element film or a hologram optical element (holographic optical element, HOE) film.
In the present embodiment, the laser projector includes an infrared laser source 210, a plurality of laser sources 220 with different colors, a light combining module 230 and a scanning mirror 240. The infrared laser source 210 is configured to emit an infrared beam 202', and the laser sources 220 with different colors are configured to emit a plurality of light beams with different colors. In the present embodiment, the laser sources 220 with different colors include a red laser source 222, a green laser source 224 and a blue laser source 226, which respectively emit a red light beam 221, a green light beam 223 and a blue light beam 225. In the present embodiment, the infrared light laser source 210 and the laser sources 220 with different colors are laser diodes (laser diode), and the emitted light beams are laser beams.
The light combining module 230 is disposed on the paths of the infrared light beam 202 'and the light beams with different colors (e.g., the red light beam 221, the green light beam 223, and the blue light beam 225) to combine the paths of the infrared light beam 202' and the light beams with different colors. The scanning mirror 240 is disposed on the paths of the infrared light beam 202 'from the light combining module 230 and the light beams with different colors, wherein the scanning mirror 240 is adapted to rotate so that the infrared light beam 202' forms the invisible light beam 202 irradiated on the first diffractive optical element film 120, and the light beams with different colors form the image light beam 204 scanned on the second diffractive optical element film 140. Further, in the present embodiment, the invisible light camera 130 is, for example, an infrared light camera.
Fig. 4 shows the scan paths and positions of the red, green, blue and infrared beams of fig. 2 on the eyeglass lens. Referring to fig. 1, 2 and 4, by rotating the scanning mirror 240, when the scanning mirror 240 is rotated to a proper angle, the infrared laser source 210 can emit the infrared light beam 202' at this time, but the different color laser sources 220 do not emit the red light beam 221, the green light beam 223 and the blue light beam 225, and at this time, the infrared light beam 202' irradiates the invisible light beam 202 on the first diffractive optical element film 120, and forms the light spot I1 on the first diffractive optical element film 120, and then the first diffractive optical element film 120 diffracts the infrared light beam 202' into the structural light beam 203. In addition, the scan mirror 240 is rotated at other angles for most of the time, and the different color laser sources 220 emit the red light beam 221, the green light beam 223 and the blue light beam 225, while the infrared light laser source 210 does not emit the infrared light beam 202', and the red light beam 221, the green light beam 223 and the blue light beam 225 can form the red light scan path I2, the green light scan path I3 and the blue light scan path I4 on the second diffraction optical element film 140, respectively. In addition, as the scanning mirror 240 rotates, the intensities of the red light beam 221, the green light beam 223 and the blue light beam 225 can be changed continuously, so that the colors and the brightness of the scanning paths can be changed, and the second diffractive optical element film 140 diffracts the red light beam 221, the green light beam 223 and the blue light beam 225 to the eye 50, so that the eye 50 can see the color image.
In addition, the eyes 50 can see the external scenery through the glasses lenses 110 in addition to the color image, so as to achieve the effect of amplifying the reality. The eyeglass lenses 110 are, for example, myopia eyeglass lenses, hyperopia eyeglass lenses, presbyopic eyeglass lenses or plano-optic eyeglass lenses.
In this embodiment, the light combining module 230 may include a plurality of dichroic mirrors (dichroic mirrors) or a plurality of dichroic prisms (dichroic prisms). For example, the light combining module 230 includes a dichroic mirror 232, a dichroic mirror 234, and a dichroic mirror 236, wherein the dichroic mirror 232 is adapted to transmit the infrared light beam 202' therethrough to the dichroic mirror 234, and the dichroic mirror 232 is adapted to reflect the blue light beam 225 to the dichroic mirror 234. Dichroic mirror 234 is adapted to pass infrared light beam 202' through blue light beam 225 to dichroic mirror 236, and dichroic mirror 234 is adapted to reflect green light beam 223 to dichroic mirror 236. Dichroic mirror 236 is adapted to transmit infrared light beam 202', blue light beam 225, and green light beam 223 to scan mirror 240, and dichroic mirror 236 is adapted to reflect red light beam 221 to scan mirror 240. In this way, the light combining module 230 can combine the paths of the red light beam 221, the green light beam 223, the blue light beam 225, and the infrared light beam 202'.
In the present embodiment, the augmented reality glasses 100 with the structured light detection function further comprise a glasses frame 150, and the laser projector 200, the glasses lenses 110 and the invisible light camera 130 are disposed on the glasses frame 150, wherein the laser projector 200 can be disposed on the earpiece of the glasses frame 150, and the invisible light camera 130 can be disposed near the center of the glasses frame 150 near the nose pad. In addition, in the present embodiment, the augmented reality glasses 100 with the structured light detection function further includes a processor 160 electrically connected to the invisible light camera 130, and configured to calculate the position of the object to be detected (i.e. the eye 50 in the present embodiment) according to the light pattern 201 (as shown in fig. 3) captured by the invisible light camera 130, for example, calculate the position of the eye 50 and the gaze direction thereof. Since the light pattern 201 is deformed or shifted according to the concave-convex curved surface of the eye 50, the processor 160 can calculate the position of each position on the eye in the three-dimensional space based on the deformation or shift. The processor 160 may also be disposed on the eyeglass frame 150, for example, on the earpiece of the eyeglass frame 150.
In one embodiment, processor 160 is, for example, a central processing unit (central processing unit, CPU), microprocessor (microprocessor), digital signal processor (digital signal processor, DSP), programmable controller, programmable logic device (programmable logic device, PLD), or other similar apparatus or combination of such apparatuses, as the invention is not limited thereto. Furthermore, in one embodiment, the functions of the processor 160 may be implemented as a plurality of program codes. The program codes are stored in a memory and executed by the processor 160. Alternatively, in an embodiment, the functions of the processor 160 may be implemented as one or more circuits. The present invention is not limited to the implementation of the functions of processor 160 in software or hardware.
In the augmented reality glasses 100 with the structured light detection function of the present embodiment, the laser projector 200 emits the invisible light beam 202 in addition to the image light beam 204, and the invisible light beam 202 forms the structured light beam 203 by the diffraction action of the first diffractive optical element 120, which is used for detecting the object to be detected. That is, the light source of the structured light 203 is integrated into the laser projector 200 for displaying images, that is, the light source of the eye tracker (eye tracker) is integrated into the laser projector 200, so that the augmented reality glasses 100 with the structured light detection function can have a simpler architecture and a smaller number of elements, and simultaneously achieve the functions of displaying images and detecting objects to be detected.
Fig. 5 is a perspective view of one embodiment of the first diffractive optical element film in fig. 1, and fig. 6 is a perspective view of another embodiment of the first diffractive optical element in fig. 1. Referring to fig. 1 and 5, the first diffractive optical element film 120 may have a plurality of microstructures 122, such as stripe-shaped protrusions in fig. 5, each microstructure 122 may extend in a direction perpendicular to the plane of the drawing in fig. 1, and the microstructures 122 may be arranged in a horizontal direction in fig. 1, so as to generate a light pattern, such as a stripe-shaped light pattern. Referring to fig. 1 and 6 again, in another embodiment, the first diffractive optical element film 120a as shown in fig. 6 may be used instead of the first diffractive optical element film 120 as shown in fig. 5. The first diffractive optical element film 120a of fig. 6 has a plurality of microstructures 122a arranged in two dimensions, the microstructures 122a being, for example, dot-like protrusions, and the light pattern thus produced being, for example, like the dot-like light pattern 201 of the array arrangement of fig. 3. The first diffractive optical element film 120 of fig. 5 and the first diffractive optical element film 120a of fig. 6 are, for example, diffraction gratings.
Fig. 7 is a schematic view of an optical path of an augmented reality glasses with a structured light detection function according to another embodiment of the present invention, fig. 8 is a schematic view of the glasses lens in fig. 7 from the direction of the eye's line of sight, and fig. 9 is a schematic view of the optical path of the laser projector in fig. 7. Referring to fig. 7 to 9, the augmented reality glasses 100b with structured light detection function of the present embodiment are similar to the augmented reality glasses 100 with structured light detection function of fig. 1, and the main differences are as follows. The augmented reality glasses 100b with the structured light detection function of the present embodiment include two first diffractive optical element films 120b disposed on both sides of the second diffractive optical element film 140, for example, a first diffractive optical element film 124b located on the right side of the second diffractive optical element film 140 and a first diffractive optical element film 126b located on the left side of the second diffractive optical element film 140. In addition, when the scanning mirror 240 of the laser projector 200 turns to two different angles at different times, the infrared light laser source 210 emits the infrared light beam 202', and the scanning mirror 240 at two different angles respectively reflects the infrared light beam 202' to different directions at two different times to form two invisible light beams 202b, such as the invisible light beam 2021 and the invisible light beam 2022, respectively, which are transmitted in different directions. Wherein the invisible light beam 2021 is irradiated on the first diffractive optical element film 124b to form the structural light beam 203, and the invisible light beam 2022 is irradiated on the first diffractive optical element film 126b to form another structural light beam 203, and both structural light beams 203 are transmitted to the eye 50 to form two light patterns on the eye. The two light patterns may encompass more angles of the eye 50 to make the processor 160 more accurate in calculating the position of the eye 50 and its gaze direction.
Fig. 10 is a schematic front view of an ophthalmic lens of an augmented reality glasses with structured light detection function according to another embodiment, as seen from the line of sight of the eye. Referring to fig. 7, 8 and 10, the augmented reality glasses with structured light detection function of the embodiment of fig. 10 are similar to the augmented reality glasses 100b with structured light detection function of fig. 7, and the difference between them is that the first diffractive optical element film 124b and the first diffractive optical element film 126b in the embodiment of fig. 10 are disposed on the upper side and the lower side of the second diffractive optical element film 140, respectively, and the invisible light beams 2021 and 2022 are irradiated on the first diffractive optical element film 124b and the first diffractive optical element film 126b, respectively.
Fig. 11 is a schematic front view of an ophthalmic lens in an augmented reality glasses with structured light detection function according to still another embodiment, as seen from the line of sight of the eye. Referring to fig. 7, 8 and 11, the augmented reality glasses with structured light detection function of the embodiment of fig. 11 are similar to the augmented reality glasses with structured light detection function 100b of fig. 7, but the difference between them is that the augmented reality glasses with structured light detection function of the embodiment of fig. 11 have four first diffractive optical element films 120c respectively arranged around the second diffractive optical element film 140, for example, the first diffractive optical element films 124c, 126c, 128c and 129c respectively arranged on the right side, the left side, the upper side and the lower side of the second diffractive optical element film 140, and the scanning mirror of the laser projector is rotated to four different angles at four different times to reflect the infrared light beams in four different directions to form four invisible light beams respectively irradiated on the first diffractive optical element films 124c, 126c, 128c and 129 c. The first diffractive optical element films 124c, 126c, 128c, and 129c diffract the four invisible light beams into four structural light beams, which are each transmitted to the eye to form four light patterns on the eye. The four light patterns may encompass more angles of the eye 50 to make the processor 160 more accurate in calculating the position of the eye 50 and its gaze direction.
Fig. 12 is a schematic view of an optical path of an augmented reality glasses with a structured light detection function according to still another embodiment of the present invention. Referring to fig. 12, the augmented reality glasses 100d with structured light detection function of the present embodiment are similar to the augmented reality glasses 100 with structured light detection function of fig. 1, and the differences are as follows. In the augmented reality glasses 100d with the structured light detection function of the present embodiment, the object to be detected is the external object 60, wherein the glasses lens 110 is located between the external object 60 and the eye 50. The first diffractive optical element film 120d diffracts the invisible light beam 202 to the outside into the structured light beam 203, and this diffraction is, for example, transmission diffraction. The structured light beam 203 is transmitted to the foreign object 60 to form a light pattern on the foreign object 60. By capturing the light pattern with the invisible light camera 130, the processor 160 can calculate the position of the external object 60. In the present embodiment, there may be a plurality of, for example, two, invisible cameras 130 disposed at the center and at one side of the glasses frame 150. The present invention does not limit the number of invisible light cameras 130. In another embodiment, the number of invisible cameras 130 may also be one.
In summary, in the amplifying reality glasses with the structured light detection function according to the embodiments of the present invention, the laser projector emits the invisible light beam in addition to the image light beam, and the invisible light beam forms the structured light beam by the diffraction action of the first diffractive optical element, which is used for detecting the object to be detected. That is, the embodiment of the invention integrates the light source of the structured light into the laser projector for displaying the image, so that the augmented reality glasses with the structured light detection function can have a simpler architecture and a smaller number of elements, and simultaneously achieve the functions of displaying the image and detecting the object to be detected.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. An augmented reality glasses with structured light detection function, adapted to be worn in front of the eyes, the augmented reality glasses with structured light detection function comprising:
the laser projector is used for emitting at least one invisible light beam and an image light beam;
an eyeglass lens disposed on a path of the invisible light beam and the image light beam;
at least one first diffraction optical element film, disposed on the eyeglass lens and located on the path of the invisible light beam, wherein the first diffraction optical element is configured to diffract the invisible light beam into a structural light beam, and the structural light beam is transmitted to an object to be detected, so as to form a light pattern on the object to be detected;
an invisible light camera for shooting the light pattern on the object to be detected; and
the second diffraction optical element film is configured on the eyeglass lens and is positioned on the path of the image light beam, and the second diffraction optical element film is used for transmitting the image light beam to the eye, wherein the at least one first diffraction optical element film comprises two first diffraction optical element films respectively configured on two sides of the second diffraction optical element film, and the at least one invisible light beam comprises two invisible light beams respectively irradiated on the two first diffraction optical element films.
2. The augmented reality glasses with structured light detection function according to claim 1, wherein the object to be detected is the eye.
3. The augmented reality glasses with structured light detection function according to claim 1, wherein the object to be detected is an external object, wherein the glasses lens is located between the external object and the eye.
4. The augmented reality glasses with structured light detection function according to claim 1, wherein the first and second diffractive optical element films are disposed on a surface of the glasses lens facing the eye.
5. The augmented reality glasses with structured light detection function according to claim 1, wherein the laser projector comprises:
an infrared laser source for emitting an infrared beam;
a plurality of laser sources of different colors for emitting a plurality of light beams of different colors;
the light combining module is configured on the paths of the infrared light beam and the light beams with different colors so as to combine the paths of the infrared light beam and the light beams with different colors; and
and a scanning mirror configured on paths of the infrared light beam from the light combining module and the plurality of light beams with different colors, wherein the scanning mirror is adapted to rotate so that the infrared light beam forms the at least one invisible light beam irradiated on the at least one first diffractive optical element film, and the plurality of light beams with different colors form the image light beam scanned on the second diffractive optical element film.
6. The augmented reality glasses with structured light detection function according to claim 1, wherein the at least one first diffractive optical element film is four first diffractive optical element films respectively arranged around the second diffractive optical element film, and the at least one invisible light beam is four invisible light beams respectively irradiated to the four first diffractive optical element films.
7. The augmented reality glasses with structured light detection function according to claim 1, wherein the second diffractive optical element film is a holographic optical element film.
8. The augmented reality glasses with structured light detection function according to claim 1, further comprising a processor electrically connected to the invisible light camera and configured to calculate a position of the object to be detected according to the light pattern captured by the invisible light camera.
9. The augmented reality glasses with structured light detection function according to claim 1, further comprising a glasses frame, wherein the laser projector and the glasses lenses are configured on the glasses frame.
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| CN111399248A (en) * | 2019-01-03 | 2020-07-10 | 宏星技术股份有限公司 | Augmented reality device, notebook computer and intelligent glasses |
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