CN208847961U - The nearly eye display optical system of the adjustable Clairvoyant type of depth of focus - Google Patents
The nearly eye display optical system of the adjustable Clairvoyant type of depth of focus Download PDFInfo
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- 230000003287 optical effect Effects 0.000 title claims abstract description 94
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 60
- 230000010287 polarization Effects 0.000 claims abstract description 50
- 238000003384 imaging method Methods 0.000 claims abstract description 6
- 208000003464 asthenopia Diseases 0.000 abstract description 7
- 230000004438 eyesight Effects 0.000 abstract description 7
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- 230000004305 hyperopia Effects 0.000 description 3
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- 230000033228 biological regulation Effects 0.000 description 2
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Abstract
The utility model discloses a kind of nearly eye display optical systems of the adjustable Clairvoyant type of depth of focus, it include: that line polarisation eyeglass, the nearly eye display Optical devices of outgoing polarisation Clairvoyant type and two liquid crystal lens are composed in turn to form imaging optical path, the outer surface of the liquid crystal lens in outside is the viewing face of human eye；The polarization direction of line polarisation eyeglass eye close with the outgoing polarisation Clairvoyant type shows that the outgoing virtual image polarization of light direction of Optical devices is vertical；The polarization direction of described two liquid crystal lens is orthogonal.Optical devices are shown by using the nearly eye of outgoing polarisation Clairvoyant type, and mutually perpendicular two liquid crystal lens of line polarisation eyeglass and polarization direction are respectively set at the device both ends, the nearly eye display optical system of the Clairvoyant type formed in this way, it is adjustable and realizes that the depth of focus is consistent with depth is assembled, it solves vision influx and adjusts collision problem, the visual fatigue for even avoiding user is reduced, and guarantees image displaying quality.The system structure is simple, adjusts and easy to use.
Description
Technical Field
The utility model relates to a nearly eye shows the field, especially relates to a depth of focus adjustable perspective type nearly eye shows optical system.
Background
The perspective display optical system is a device which can make the user watch the external scenery and project the image at the same time, so as to achieve the effect of overlapping the real image and the virtual image without shielding the visual field. Some known see-through display optical systems employ a prism with a reflecting surface (a plane or a free-form surface) and one or more optical lenses, and some employ an optical waveguide lens and a projection lens.
At present, the perspective display optical systems have a problem of convergence-convergence conflict, which seriously affects user experience, that is, people perceive a 3D effect by forming different parallax images on left and right eyes of a person, when the human eyes watch a 3D image, the depth of focus (convergence) generated by lens adjustment is always fixed on a display screen, and the depth of convergence (convergence) generated by eye movement varies with the spatial position of a 3D object, which causes the depth of focus to be inconsistent with the depth of convergence, thereby causing visual fatigue.
In order to solve the problem of convergence and adjustment conflict. Some have adopted multi-focal-plane near-to-eye display technology (e.g., Magic leap corporation), but this has the disadvantage that the system is bulky. Microlens array (Micro-lens array) light field display technology (such as great company) has also been adopted, but this technology can seriously reduce the display resolution of the image. Therefore, how to provide a near-eye display optical system which is small in size, low in complexity of the optical system, and capable of ensuring image display quality, and solving the conflict of vergence adjustment is a problem to be solved.
SUMMERY OF THE UTILITY MODEL
Based on the problem that prior art exists, the utility model aims at providing a depth of focus adjustable perspective type near-to-eye display optical system, when guaranteeing image display quality, solve the convergence of vision and adjust the conflict to reduce the visual fatigue who avoids the user even.
The utility model aims at realizing through the following technical scheme:
an embodiment of the utility model provides a depth of focus adjustable perspective type near-to-eye display optical system, include:
the device comprises a linear polarized lens, an emergent polarized light perspective type near-to-eye display optical device and two liquid crystal lenses; wherein,
the linear polarized lens, the emergent polarized light perspective type near-to-eye display optical device and the two liquid crystal lenses are sequentially arranged at intervals to form an imaging light path, and the outer surface of the liquid crystal lens positioned at the outer side is a viewing surface of human eyes;
the polarization direction of the linearly polarized lens is vertical to the polarization direction of emergent virtual image light of the emergent polarized light perspective type near-to-eye display optical device;
the polarization directions of the two liquid crystal lenses are perpendicular to each other.
By the foregoing the utility model provides a technical scheme can see out, the embodiment of the utility model provides a dark adjustable perspective type near-to-eye display optical system of burnt, its beneficial effect is:
by adopting the emergent polarization perspective type near-eye display optical device, and respectively arranging the linear polarization lens and the two liquid crystal lenses with mutually vertical polarization directions at the two ends of the emergent polarization perspective type near-eye display optical device, the perspective type near-eye display optical system formed in the way can modulate the external live-view light through the linear polarization lens, so that the external live-view light reaching the two liquid crystal lenses through the emergent polarization perspective type near-eye display optical device is linearly polarized light, the polarization direction is vertical to the polarization direction of the emergent virtual image light of the emergent polarization perspective type near-eye display optical device, one liquid crystal lens regulates the light of a virtual view, namely the focal depth of the virtual view is regulated, the other liquid crystal lens regulates the light of the real view, namely the focal depth of the real view is regulated, the two lenses are not interfered with each other, the focusing depth and the convergence depth are consistent after regulation, and the problem of visual ray regulation conflict is solved, the visual fatigue of the user is reduced or even avoided, and the image display quality is ensured. The optical system has simple structure and convenient adjustment and use.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view illustrating a perspective type near-to-eye display optical system with adjustable focal depth according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a configuration of an exit polarized light perspective type near-to-eye display optical device with adjustable focal depth according to an embodiment of the present invention;
fig. 3 is another schematic diagram illustrating another structure of an exit polarized light perspective type near-to-eye display optical device with adjustable focal depth according to an embodiment of the present invention;
fig. 4 is a schematic view of a perspective near-to-eye display optical system with adjustable focal depth provided in an embodiment of the present invention;
fig. 5a is a schematic close-up virtual image imaging diagram of a perspective type near-to-eye display optical system with adjustable focal depth provided in the embodiment of the present invention;
fig. 5b is a schematic view of a remote virtual image imaging of a perspective type near-to-eye display optical system with adjustable focal depth provided by an embodiment of the present invention;
fig. 6 is a schematic view of a conventional perspective-type near-eye display optical system applied to two eyes;
FIG. 7a is a schematic close-up virtual image of a conventional see-through near-eye display optical system;
FIG. 7b is a schematic view of a remote virtual image of a conventional see-through near-eye display optical system;
fig. 8a is a schematic view of a near-eye image of a perspective type near-eye display optical system with adjustable focal depth applied to two eyes according to an embodiment of the present invention;
fig. 8b is a schematic view of a binocular remote virtual image of a perspective type near-to-eye display optical system with adjustable focal depth according to an embodiment of the present invention;
in the figure: 1-linearly polarized lens; 2-an emergent polarized light perspective type near-to-eye display optical device; 21-see-through near-to-eye display refractive lens; 211-mirror array waveguide optics; 22-projection lens set; 23-micro display; 24-a polarizing element; 3-a second liquid crystal lens; 4-a first liquid crystal lens; 5-human eye; 51-left eye; 52-right eye; 10-a perspective type near-eye display optical system with adjustable focal depth corresponding to the left eye; 20-a perspective type near-eye display optical system with adjustable focal depth corresponding to the right eye; a-virtual image I; b-external real scene one; c-external real scene two; a 1-virtual left eye image; a 2-virtual right eye image; a 3-binocular virtual image; b1-virtual image two.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the specific contents of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Details not described in the embodiments of the present invention belong to the prior art known to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides a perspective type near-to-eye display optical system with adjustable focal depth, including:
the device comprises a linear polarized lens, an emergent polarized light perspective type near-to-eye display optical device and two liquid crystal lenses; wherein,
the linear polarized lens, the emergent polarized light perspective type near-to-eye display optical device and the two liquid crystal lenses are sequentially arranged at intervals to form an imaging light path, and the outer surface of the liquid crystal lens positioned at the outer side is a viewing surface of human eyes;
the polarization direction of the linearly polarized lens is vertical to the polarization direction of emergent virtual image light of the emergent polarized light perspective type near-to-eye display optical device;
the polarization directions of the two liquid crystal lenses are perpendicular to each other.
In the optical system, the virtual image light beam emitted from the polarized-light see-through near-eye display optical device is linearly polarized light.
In the above optical system, the polarization direction of the liquid crystal lens adjacent to the outgoing polarized light see-through near-eye display optical device is parallel to the polarization direction of the outgoing virtual image light of the see-through near-eye display dioptric lens of the see-through near-eye display optical device.
As shown in fig. 2 and 3, the outgoing polarization see-through type near-eye display optical device in the optical system includes:
a perspective near-eye display dioptric lens and a projection component; wherein,
a projection assembly is arranged at the lower part of the incident surface of the perspective near-eye display dioptric lens;
the perspective type near-eye display refraction lens adopts an emergent polarized light perspective type near-eye display refraction lens, and the projection assembly adopts a common projection assembly, such as a projection assembly which mostly adopts OLED and DMD as micro-displays; or the perspective near-eye display refraction lens adopts a common perspective near-eye display refraction lens, the projection assembly adopts an emergent polarized light projection assembly or a common polarized light projection assembly combined with a polarized light element for use, in the common projection assembly combined with the polarized light element for use, the common polarized light projection assembly consists of a projection lens group and a micro display which are arranged at intervals, and the projection lens group is positioned on an incident surface of the emergent polarized light perspective near-eye display refraction lens; the polarized light element is arranged between the common projection assembly and the perspective type near-eye display refraction lens, so that emergent light is linearly polarized light.
In the above system, the outgoing polarized light perspective type near-to-eye display dioptric lens adopts any one of a mirror array waveguide lens (see fig. 3), a grating waveguide lens and a prism with a reflecting surface; other forms of perspective near-to-eye display dioptric lenses can also be adopted as long as emergent light is ensured to be polarized light.
The general projection assembly includes:
the projection lens group is arranged on an incident surface of the emergent polarized light perspective type near-to-eye display refraction lens.
In the above system, the exit polarized projection assembly includes (see fig. 4):
the polarized light elements, the projection lens group and the micro display are arranged at intervals; wherein the polarizing element is arranged on the incident surface of the perspective near-eye display dioptric lens.
The above optical system further includes: the control power supply is respectively electrically connected with the two liquid crystal lenses and can respectively input the same or different voltage signals to the two liquid crystal lenses; alternatively, the same or different voltage signals are simultaneously input to the two liquid crystal lenses.
The above optical system further includes: the machine shell, the linear polarized lens, the emergent polarized light perspective type near-to-eye display optical device and the two liquid crystal lenses are all arranged on the machine shell.
The embodiments of the present invention will be described in further detail below.
The utility model provides a perspective type near-to-eye display optical system with adjustable focal depth, which consists of a linear polarized lens, an emergent polarized light perspective type near-to-eye display optical device and two liquid crystal lenses, wherein the polarization directions of the two liquid crystal lenses are mutually vertical; the arrangement of the linearly polarized lens, the see-through near-eye display dioptric lens and the two liquid crystal lenses is shown in fig. 1. The first liquid crystal lens 4, the second liquid crystal lens 3, the perspective type near-to-eye display dioptric lens 21 and the linear polarized lens 1 are arranged in sequence from human eyes to the outside.
The linearly polarized lens is a lens which can enable light rays vibrating in a specific direction to pass through but can not enable light rays vibrating in other vibration directions to pass through, and after natural light passes through the linearly polarized lens, linearly polarized light with a fixed polarization direction can be generated.
The liquid crystal lens is a lens capable of changing diopter by inputting a voltage signal. When no voltage signal exists, the liquid crystal lens has no refractive power and cannot generate a convergence effect on light, and the liquid crystal lens is equivalent to a piece of flat glass. When a certain voltage signal is input, the liquid crystal lens can generate refractive power, can generate convergence or divergence effect on light passing through the liquid crystal lens, is equivalent to a convex lens or a concave lens, and can generate different refractive powers when different voltage signals are input.
A single liquid crystal lens produces refractive power for only one polarization component of light and does not produce optical effects for the right angle (right angle) polarization component.
The emergent polarized light perspective type near-eye display optical device generally comprises a perspective type near-eye display dioptric lens and a projection component; arranged together with the linearly polarized lens and the two liquid crystal lenses is a see-through type near-eye display dioptric lens in the exit polarized see-through type near-eye display optical device.
The utility model discloses emergent polarization perspective type near-to-eye display optical device's in the system structure is shown in fig. 2, and this emergent polarization perspective type near-to-eye display optical device's emergent virtual image light is the linear polarization light.
As shown in fig. 3, in order to realize that the emergent virtual image light of the emergent polarized light perspective type near-to-eye display optical device is linearly polarized light, in the emergent polarized light perspective type near-to-eye display optical device, the waveguide perspective type near-to-eye display dioptric lens is an emergent polarized light perspective type near-to-eye display dioptric lens, and as long as the emergent polarized light perspective type near-to-eye display dioptric lens does not affect the real scene light, the emergent polarized light perspective type near-to-eye display dioptric lens can be applied to the emergent polarized light perspective type near-to-eye display optical device, and the perspective type near-to-eye display dioptric lens can be a mirror array waveguide lens, a grating waveguide lens, a prism with a reflection surface, or other forms. It is understood that the structure of the see-through type near-eye display optical device using the mirror array waveguide lens as shown in fig. 3 is merely an example, and the specific structure of the optical device using the array waveguide lens is not limited thereto.
As shown in fig. 4, in order to realize that the virtual outgoing image light of the optical device for near-to-eye display of outgoing polarized light perspective type is linearly polarized light, the virtual outgoing image light can also be modulated into linearly polarized light by providing a polarization element (the polarization element may adopt a linearly polarized lens (i.e. a second linearly polarized lens) or other type of polarizer) in the projection assembly portion.
The utility model discloses the concrete structure of system refers to fig. 4, and wherein, line polarisation lens can modulate external live action light for the external live action light that the refraction lens that shows optical device through the nearly eye of emergent polarisation perspective type reachs the second liquid crystal lens is the line polarisation, and polarization direction with the emergent virtual image light polarization direction of refraction lens is perpendicular.
The polarization direction of the second liquid crystal lens is parallel to the polarization direction of virtual image light emitted by the perspective near-eye display refraction lens and is vertical to the polarization direction of the modulated external real scene light.
The polarization direction of the first liquid crystal lens 4 is perpendicular to the polarization direction of the second liquid crystal lens 3.
The polarization direction of the first liquid crystal lens 4 is perpendicular to the polarization direction of virtual image light emitted by the perspective near-eye display dioptric lens 21, and is parallel to the polarization direction of the modulated external real scene light.
When a voltage signal is input to the second liquid crystal lens 3, the second liquid crystal lens generates a refractive power for light parallel to its polarization direction and does not generate an optical effect for light perpendicular to its polarization direction. Therefore, the second liquid crystal lens generates refractive power for virtual image light rays emitted from the perspective type near-eye display dioptric lens 21, and does not generate optical action for external real scene light rays.
Different voltage signals are input into the second liquid crystal lens 3, so that the virtual image light rays emitted by the second liquid crystal lens to the perspective type near-eye display optical virtual image can be controlled to generate different refractive powers, the depth of focus of the virtual image is controlled, and meanwhile, the light rays of an external real scene (namely, an external real scene one) are not changed, as shown in fig. 5a and 5 b.
As shown in fig. 6, when the human eye observes the real scene, the depth of focus of the left and right eyes is consistent with the depth of convergence of the two eyes. However, in general, the depth of focus of the left and right eyes of a conventional see-through type near-eye display optical system is not changed, and virtual images at different distances are displayed by changing the depth of focus of the two eyes (see, for example, fig. 7a and 7 b). This causes a conflict in convergence adjustment, unlike the perception habits of human eyes, and thus causes visual fatigue. And the utility model discloses a depth of focus can be adjusted to the system, makes depth of focus and binocular assemble the degree of depth unanimously to solve the tired problem of vision, it is shown with reference to figure 8a, 8 b.
When the displayed virtual image has depth gradation, the depth of focus of the left and right eyes can be adjusted to a proper position, thereby effectively reducing visual fatigue caused by convergence adjustment conflict.
The voltage signal is input to the first liquid crystal lens 4, the refractive power can be generated for the external real scene light, and at the moment, the first liquid crystal lens 4 is equivalent to a myopia lens or a hyperopia lens, so that the system can be adapted to a myopia or hyperopia patient without wearing vision correction glasses.
The first liquid crystal lens 4 and the second liquid crystal lens 3 can input the same or different voltage signals respectively or simultaneously, so that the same or different refractive powers are generated respectively, and the adjustment requirements of the system on the virtual image and the external real scene light rays are met.
During use, the refractive power of the first liquid crystal lens 4 can be adjusted to a fixed value to match the wearer's vision.
Preferably, the positions of the first and second liquid crystal lenses 4 and 3 in the present invention can be interchanged.
The utility model discloses an optical system can effectively solve the convergence of the current general existence among the perspective type near-to-eye display optical system and adjust the conflict problem, alleviates user's visual fatigue. Moreover, the optical system can adapt to different eyesight, including myopia and hyperopia, and a wearer does not need to wear vision correction glasses again in the process of using the optical system, so that the use convenience is improved.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A depth-of-focus adjustable see-through near-to-eye display optical system, comprising:
the device comprises a linear polarized lens, an emergent polarized light perspective type near-to-eye display optical device and two liquid crystal lenses; wherein,
the linear polarized lens, the emergent polarized light perspective type near-to-eye display optical device and the two liquid crystal lenses are sequentially arranged at intervals to form an imaging light path, and the outer surface of the liquid crystal lens positioned at the outer side is a viewing surface of human eyes;
the polarization direction of the linearly polarized lens is vertical to the polarization direction of emergent virtual image light of the emergent polarized light perspective type near-to-eye display optical device;
the polarization directions of the two liquid crystal lenses are perpendicular to each other.
2. The see-through near-eye display optical system with adjustable depth of focus according to claim 1, wherein the emergent virtual image ray of the emergent polarized see-through near-eye display optical device is linearly polarized light.
3. The depth-of-focus adjustable see-through near-to-eye display optical system according to claim 1 or 2, wherein in the system, a polarization direction of a liquid crystal lens adjacent to the exit polarized see-through near-eye display optical device is parallel to a polarization direction of an exit virtual image ray of a see-through near-eye display dioptric lens of the see-through near-eye display optical device.
4. The depth-of-focus adjustable see-through near-eye display optical system according to claim 1 or 2, wherein the exit polarization see-through near-eye display optical device includes:
a perspective near-eye display dioptric lens and a projection component; wherein,
a projection assembly is arranged at the lower part of the incident surface of the perspective near-eye display dioptric lens;
the perspective type near-eye display dioptric lens adopts an emergent polarized light perspective type near-eye display dioptric lens, and the projection assembly adopts a common projection assembly; or the perspective type near-eye display dioptric lens adopts a common perspective type near-eye display dioptric lens, and the projection assembly adopts an emergent polarized light projection assembly or a common polarized light projection assembly used in combination with a polarized light element.
5. The depth-of-focus adjustable see-through near-eye display optical system according to claim 4, wherein the exit polarization see-through near-eye display dioptric lens is any one of a mirror array waveguide lens, a grating waveguide lens and a prism with a reflection surface;
the general polarized projection assembly includes:
the projection lens group is arranged on an incident surface of the emergent polarized light perspective type near-to-eye display refraction lens.
6. The depth-of-focus adjustable see-through near-eye display optical system of claim 4, wherein the common polarized projection assembly used in combination with a polarizing element comprises:
the common polarized light projection assembly consists of a projection lens group and a micro display which are arranged at intervals, and the projection lens group is positioned on an incident surface of the emergent polarized light perspective type near-eye display refraction lens;
the polarized light element is arranged between the common projection assembly and the perspective type near-eye display refraction lens, so that emergent light is linearly polarized light.
7. The depth-of-focus adjustable see-through near-eye display optical system according to claim 1 or 2, further comprising: the control power supply is respectively and electrically connected with the two liquid crystal lenses and can respectively input the same or different voltage signals to the two liquid crystal lenses; alternatively, the same or different voltage signals are simultaneously input to the two liquid crystal lenses.
8. The depth-of-focus adjustable see-through near-eye display optical system according to claim 1 or 2, further comprising: the linear polarized lens, the emergent polarized light perspective type near-to-eye display optical device and the two liquid crystal lenses are all arranged on the machine shell.
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| CN201821759378.XU CN208847961U (en) | 2018-10-29 | 2018-10-29 | The nearly eye display optical system of the adjustable Clairvoyant type of depth of focus |
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| CN201821759378.XU CN208847961U (en) | 2018-10-29 | 2018-10-29 | The nearly eye display optical system of the adjustable Clairvoyant type of depth of focus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061884A (en) * | 2018-10-29 | 2018-12-21 | 北京枭龙科技有限公司 | The nearly eye display optical system of the adjustable Clairvoyant type of depth of focus |
| CN110244309A (en) * | 2019-06-21 | 2019-09-17 | 浙江舜宇光学有限公司 | The detection system and method for depth |
| WO2021254320A1 (en) * | 2020-06-16 | 2021-12-23 | 京东方科技集团股份有限公司 | See-through head-mounted display |
-
2018
- 2018-10-29 CN CN201821759378.XU patent/CN208847961U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061884A (en) * | 2018-10-29 | 2018-12-21 | 北京枭龙科技有限公司 | The nearly eye display optical system of the adjustable Clairvoyant type of depth of focus |
| CN110244309A (en) * | 2019-06-21 | 2019-09-17 | 浙江舜宇光学有限公司 | The detection system and method for depth |
| WO2021254320A1 (en) * | 2020-06-16 | 2021-12-23 | 京东方科技集团股份有限公司 | See-through head-mounted display |
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