CN217360458U - Optical machine, near-to-eye display equipment and dimming unit - Google Patents
Optical machine, near-to-eye display equipment and dimming unit Download PDFInfo
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Abstract
The embodiment of the utility model relates to augmented reality technical field discloses an ray apparatus, near-to-eye display device and unit of adjusting luminance, and this ray apparatus includes like image source unit, lighting unit, the unit of adjusting luminance and formation of image unit, and this unit of adjusting luminance includes the free-form surface prism, first compensation prism and second compensation prism, and this lighting unit can output the illumination light, and this unit of adjusting luminance can be with illumination light turn to like image source unit, arouses like image source unit to produce image light, and image light loops through the unit of adjusting luminance again and forms images with formation of image unit output, the embodiment of the utility model provides a through setting up adjust luminance the unit, on the one hand can be with the even light back output of illumination light to like image source unit, and on the other hand possesses the function of exporting like image light and not equidirectional with image light and illumination light separation again, and the whole volume of ray apparatus is less, has compromise ray apparatus and near-to-eye display device's portability.
Description
Technical Field
The embodiment of the utility model provides a relate to augmented reality technical field, in particular to ray apparatus, near-to-eye display device and unit of adjusting luminance.
Background
Near-eye display systems, also known as head-mounted displays, originally originated in the field of air force, mainly to solve the problem of the great amount of information collected by the increasingly sophisticated instruments and weapons systems on aircraft, by means of which all the information of the instruments can be presented in the field of view in front of the pilot, concentrating the pilot on the operation of the aircraft and aiming. As people learn and understand near-eye display products more, the application field of the near-eye display products is also expanding continuously. In the civil aspect, the method is mainly combined with related virtual technologies and applied to education and training, exhibition and promotion of commercial products, simulation training of medicine and the like.
In implementing the embodiments of the present invention, the inventor finds that there are at least the following problems in the above related art: in a traditional Augmented Reality (AR) light machine, a lighting system generally uses a compound eye or light homogenizing scheme of a light guide tube, and the two schemes can achieve high energy utilization rate and uniformity, but have the defect of overlarge volume, which conflicts with the light requirement of the light machine.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides an optical machine, near-to-eye display equipment and a dimming unit.
The embodiment of the utility model provides an aim at is realized through following technical scheme:
in order to solve the above technical problem, in a first aspect, the embodiment of the present invention provides an optical machine, including: an image source unit for receiving the illumination light and generating and outputting image light; an illumination unit for outputting the illumination light; the dimming unit is arranged on the light emitting sides of the illumination unit and the image source unit and comprises a free-form surface prism, a first compensation prism and a second compensation prism, the illumination light is collimated and homogenized through the free-form surface prism and the first compensation prism and then is emitted to the image source unit, and the image light is output after the light emitting direction is adjusted through the first compensation prism, the free-form surface prism and the second compensation prism in sequence; and the imaging unit is arranged on the light emitting side of the dimming unit and used for imaging the image light output by the dimming unit.
In some embodiments, the freeform prism comprises at least: the first working surface is arranged in the light outgoing direction of the illuminating unit and used for transmitting the illuminating light into the free-form surface prism; a second working surface, one edge of which is connected with an edge of the first working surface, for reflecting the illumination light with an incident angle larger than a critical angle of total reflection when reaching the second working surface for one time, transmitting the illumination light with an incident angle smaller than the critical angle of total reflection when reaching the second working surface, and transmitting the image light; and one edge of the third working surface is connected with the other edge of the second working surface, and the other edge of the third working surface is connected with the other edge of the first working surface, so that the illumination light after primary reflection is secondarily reflected to the second working surface, the incident angle of the illumination light after secondary reflection when reaching the second working surface is smaller than the critical angle of total reflection, and the image light is transmitted.
In some embodiments, the first working surface, the second working surface, and the third working surface are all free-form surfaces, and the free-form surfaces are composed of a plurality of small surface elements.
In some embodiments, the first compensation prism comprises at least: a first surface disposed toward the image source unit for transmitting the illumination light to the image source unit and the image light into the first compensation prism; and a second surface, one edge of which is connected with one edge of the first surface, the surface type of which is the same as that of the second working surface, and the second surface is attached to the second working surface and used for transmitting the illumination light and the image light.
In some embodiments, the first surface is a flat surface and the second surface is a free-form surface, the free-form surface being composed of a number of facets.
In some embodiments, the second compensation prism comprises at least: a third surface disposed toward the imaging unit for transmitting the image light out to the imaging unit; and one edge of the fourth surface is connected with one edge of the third surface, the surface type of the fourth surface is the same as that of the third working surface, and the fourth surface is attached to the third working surface and used for transmitting the image light.
In some embodiments, the third surface is a flat surface and the fourth surface is a free-form surface, the free-form surface being composed of a number of minor facets.
In some embodiments, the imaging unit is a lens set including at least two imaging lenses.
In order to solve the above technical problem, in a second aspect, the embodiment of the present invention provides a near-to-eye display device, including: the optical machine according to the first aspect, and a waveguide disposed in the light exit direction of the optical machine, wherein the waveguide is configured to output the imaging light beam output by the optical machine to a human eye for imaging.
In order to solve the above technical problem, a third aspect of the present invention provides a light modulation unit, including: the free-form surface prism, first compensation prism and second compensation prism, wherein, the free-form surface prism includes at least: the device comprises a first working surface, a second working surface and a third working surface, wherein one edge of the second working surface is connected with one edge of the first working surface, one edge of the third working surface is connected with the other edge of the second working surface, and the other edge of the third working surface is connected with the other edge of the first working surface; the first compensating prism includes at least: the surface type of the second surface is the same as that of the second working surface and is attached to the second working surface; the second compensating prism includes at least: the surface type of the fourth surface is the same as that of the third working surface, and the fourth surface is attached to the third working surface.
In some embodiments, the first working surface, the second working surface, the third working surface, the second surface, and the fourth surface are all free-form surfaces, the free-form surfaces are composed of a plurality of facet elements, and the first surface and the third surface are both planar surfaces.
Compared with the prior art, the beneficial effects of the utility model are that: be different from prior art's condition, the embodiment of the utility model provides an optical machine, near-to-eye display device and unit of adjusting luminance is provided, this optical machine includes like source unit, the lighting unit, adjust luminance unit and imaging unit, this unit of adjusting luminance includes the free-form surface prism, first compensation prism and second compensation prism, this lighting unit can output the illumination light, this unit of adjusting luminance can be with illumination light turn to like source unit, arouse like source unit and produce image light, image light loops through the unit of adjusting luminance again and imaging unit output formation of image. The embodiment of the utility model provides a through setting up the unit of adjusting luminance can be exported to like source unit after the even light of illumination light on the one hand, and on the other hand possesses the function of exporting image light sum illumination light separation to not equidirectional again, and the whole volume of ray apparatus is less, has compromise ray apparatus and near-to-eye display device's portability.
Drawings
The embodiments are illustrated by the figures of the accompanying drawings which correspond and are not meant to limit the embodiments, in which elements/blocks having the same reference number designation may be represented by like elements/blocks, and in which the drawings are not to scale unless otherwise specified.
Fig. 1 is a structure and a light path diagram of an optical machine according to an embodiment of the present invention;
FIG. 2 is an imaging schematic diagram of an image source unit in the light engine of FIG. 1;
FIG. 3 is a block diagram of a free form prism in the optical bench of FIG. 1;
FIG. 4 is a block diagram of a first compensating prism in the optical bench of FIG. 1;
FIG. 5 is a block diagram of a second compensating prism in the optical bench of FIG. 1;
FIG. 6 is an enlarged view of the free-form surface element structure of FIGS. 3, 4 and 5;
fig. 7 is a structural diagram of a near-eye display device according to a second embodiment of the present invention.
In the figure: 101. an image source unit; 201. a lighting unit; 301. a free-form surface prism; 302. a first compensation prism; 303. a second compensating prism; 3011. a first working surface; 3012. a second working face; 3013. a third working face; 3021. a first surface; 3022. a second surface; 3031. a third surface; 3032. a fourth surface; 401. a first imaging lens; 402. a second imaging lens; 10. a near-eye display device; 100. an optical machine; 200. a waveguide sheet.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be noted that, if not conflicted, the various features of the embodiments of the invention can be combined with each other and are within the scope of protection of the present application. In addition, although the functional blocks are divided in the device diagram, in some cases, the blocks may be divided differently from those in the device. Further, the terms "first," "second," "third," and the like, as used herein do not limit the order of data and execution, but merely distinguish between identical or similar items that have substantially the same function or effect. In order to facilitate the connection structure to be limited, the utility model discloses use the light-emitting direction of light to carry out the position of part and prescribe a limit to as the reference.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
Specifically, the embodiments of the present invention will be further explained with reference to the drawings.
Example one
The embodiment of the utility model provides an optical machine please refer to fig. 1, it shows the utility model provides a structure and light path of optical machine, the optical machine includes: an image source unit 101, an illumination unit 201, a dimming unit (including at least 301, 302, and 303), and an imaging unit (including at least 401 and 402).
The image source unit 101 for receiving illumination light and generating and outputting image light; in an embodiment of the present invention, the image source unit 101 is particularly suitable for a Digital Light Processing (DLP), the DLP element is composed of a plurality of Digital Micromirror Devices (DMDs) arranged in an array, and can implement a visual Digital information display, each DMD is equivalent to a pixel, and the Digital control technology can implement the angle switching between the DMD and the DLP protective cover plate surface, thereby implementing the "on" and "off" of the DMD, i.e. the on and off of each pixel, so as to implement the visual Digital information display, specifically, see fig. 2, which shows the imaging schematic diagram of the image source unit 101 in the optical engine shown in fig. 1, since there is a certain inclination angle during the operation, in order to ensure that the outgoing Light at the center is perpendicular to the surface of the image source unit 101, the illuminating Light for illuminating the DMD needs to shine into the DMD at a certain angle, the adjustment of the angle of the illumination light is realized by the dimming unit in the embodiment of the present invention.
The illumination unit 201 is configured to output the illumination light; specifically, the illumination unit 201 may be a Light-Emitting Diode (LED) Light source integrated by RGB (red, green, and blue) lampwicks, and specifically, the number and arrangement of the LEDs in the illumination unit 201, the color setting of Light, and the like may be designed according to actual needs.
The dimming unit is arranged on the light emitting sides of the illumination unit 201 and the image source unit 101, and comprises a free-form surface prism 301, a first compensation prism 302 and a second compensation prism 303, the illumination light is collimated and homogenized through the free-form surface prism 301 and the first compensation prism 302 in sequence and then emitted to the image source unit 101, and the image light is output after the light emitting direction is adjusted through the first compensation prism 302, the free-form surface prism 301 and the second compensation prism 303 in sequence; wherein the refractive index of the first compensating prism 302 and the refractive index of the second compensating prism 303 are both smaller than the refractive index of the free-form surface prism 301.
Specifically, referring to fig. 3, which shows a structure of the free-form surface prism 301 in the optical machine shown in fig. 1, the free-form surface prism 301 includes one or more free-form surfaces, and in the example shown in fig. 3, the free-form surface prism 301 at least includes: a first work surface 3011 disposed in the light exit direction of the illumination unit 201 for transmitting the illumination light into the free-form surface prism 301; a second working surface 3012, one edge of which is connected to an edge of the first working surface 3011, and configured to once reflect the illumination light having an incident angle larger than a critical angle of total reflection when reaching the second working surface 3012, transmit the illumination light having an incident angle smaller than the critical angle of total reflection when reaching the second working surface 3012, and transmit the image light; and one edge of the third working surface 3013 is connected to the other edge of the second working surface 3012, and the other edge of the third working surface 3013 is connected to the other edge of the first working surface 3011, and is configured to reflect the illumination light after the primary reflection to the second working surface 3012 for a second time, so that an incident angle when the illumination light after the secondary reflection reaches the second working surface 3012 is smaller than a critical angle of total reflection, and to transmit the image light. In a preferred embodiment, the primary reflection and the secondary reflection are total reflections; namely: the second working surface 3012 is configured to totally reflect the illumination light with an incident angle larger than a critical total reflection angle once when reaching the second working surface 3012, make the incident angle of the illumination light after total reflection once when reaching the third working surface 3013 larger than a critical total reflection angle, and transmit the illumination light with an incident angle smaller than the critical total reflection angle when reaching the second working surface 3012; the third working surface 3013 is configured to totally reflect the illumination light after primary total reflection to the second working surface 3012 twice, make an incident angle of the illumination light after secondary reflection when reaching the second working surface 3012 smaller than a critical angle of total reflection, and transmit the image light.
In addition, please refer to fig. 4, which shows a structure of the first compensation prism 302 in the optical machine shown in fig. 1, wherein the first compensation prism 302 at least includes: a first surface 3021, provided toward the image source unit 101, for transmitting the illumination light to the image source unit 101 and the image light into the first compensation prism 302; a second surface 3022 having an edge connected to an edge of the first surface 3021, having a same surface shape as the second working surface 3012, and attached to the second working surface 3012, for transmitting the illumination light and the image light.
In addition, please refer to fig. 5, which shows a structure of the second compensating prism 303 in the optical machine shown in fig. 1, wherein the second compensating prism 303 at least includes: a third surface 3031, provided toward the imaging unit, for transmitting the image light to exit to the imaging unit; and a fourth surface 3032, one edge of which is connected to an edge of the third surface 3031, and a surface shape of which is the same as that of the third working surface 3013, and is attached to the third working surface 3013, and is configured to transmit the image light. The front and back surfaces (namely the second working surface 3012 and the third working surface 3013) of the free-form surface prism 301 are respectively provided with the compensating prisms (the first compensating prism 302 and the second compensating prism 303), so that the influence of the illuminating element on an imaging light path is avoided; namely: therefore, the image light generated by the image source unit 101 can be prevented from directly irradiating the second working surface 3012 and the third working surface 3013 of the free-form surface prism 301, so that the image light cannot vertically enter the free-form surface prism and cannot penetrate through the free-form surface prism 301 with high luminous efficiency.
In addition, the first working surface 3011, the second working surface 3012, and the third working surface 3013 are all free-form surfaces, and the free-form surfaces are composed of a plurality of small surface elements; the first surface 3021 is a plane, the second surface 3022 is a free-form surface, and the free-form surface is composed of a plurality of small surface elements; the third surface 3031 is a plane, the fourth surface 3032 is a free-form surface, and the free-form surface is composed of a plurality of small surface elements; the enlarged view of the surface element structure of the free-form surface element can be seen in fig. 6, and the surface shape of each small surface element can be independently designed and adjusted during design, so that the required light regulation and control capability is achieved, and the free-form surface element with the surface element structure has high design freedom and can realize comprehensive light regulation. Therefore, by applying the free-form surface prism 301 to the AR illumination system, the three free-form surface working surfaces (3011, 3012, 3013) have high degrees of freedom, so that the illumination system can be ensured to achieve high energy utilization rate and uniformity, and the volume of the illumination system can be effectively reduced. Furthermore, the free-form surface is composed of a plurality of small surface elements with different curvatures.
The imaging unit is arranged on the light emitting side of the dimming unit and used for imaging the image light output by the dimming unit; the imaging unit is a lens group, the lens group at least comprises two imaging lenses, the imaging lenses can be resin material lenses, glass material lenses or lenses formed by combining two materials, and the surface types of the imaging lenses can be spherical surfaces, aspherical surfaces and the like; specifically, in the example shown in fig. 1, the imaging unit includes a first imaging lens 401 and a second imaging lens 402, and the first imaging lens 401 is a concave lens and the second imaging lens 402 is a convex lens, and the imaging unit having this structure can shape the image light output from the dimming unit into parallel light (i.e., an imaging light beam). In other embodiments, the number, shape, material, etc. of the imaging lenses can be designed according to actual needs, and need not be limited by the embodiments of the present invention.
The optical engine provided by the embodiment of the present invention can be applied to an augmented reality device, and in the working process of the optical engine, please refer to fig. 1 continuously, wherein a dotted line represents illumination light, a solid line represents image light, the illumination light emitted by the illumination unit 201 passes through the first working surface 3011 of the freeform prism 301 and irradiates on the second working surface 3012 at a first angle, after being totally reflected by the second working surface 3012 and irradiates on the third working surface 3013 at a second angle, after being totally reflected by the third working surface 3013 and irradiating on the second working surface 3012 at a third angle, the illumination light refracted by the second working surface 3012 and collimated into uniform illumination light irradiates on the image source unit 101 (for example, the image source unit 101 is a DLP) at a certain angle, after the image source unit 101 (for example, a DMD on a DLP) is illuminated, a displayed information picture is displayed, the image light containing information picture content exits perpendicularly to the surface of the image source unit 101, since the first surface 3021 of the first compensation prism 302 and the third surface 3031 of the second compensation prism 303 are both flat, the image light directly passes through the first compensation prism 302 and the third compensation prism 303 according to the refraction theorem, that is, the image light irradiates the second working surface 3012 at a fourth angle through the first surface 3021 of the first compensation prism 302, irradiates the third working surface 3013 at a fifth angle after being refracted by the second working surface 3012, irradiates the imaging unit through the third surface 3031 of the second compensation prism 303 at a sixth angle through the third working surface 3013, is modulated by the first imaging lens 401 and the second imaging lens 402, and is emitted as parallel light (i.e., an imaging light beam). The utility model discloses utilize special lighting system, reduced the whole volume of ray apparatus, also be favorable to the global design of later stage product, and have, can realize AR optical imaging at second imaging lens 402 play plain noodles collocation diffraction waveguide piece or array waveguide piece.
Example two
The embodiment of the utility model provides a near-to-eye display device, please see fig. 7, it shows the utility model provides a near-to-eye display device's structure, near-to-eye display device 10 includes, include: an optical engine 100 and a waveguide sheet 200.
The optical machine 100 is an optical machine according to the first embodiment, and is capable of outputting an imaging light beam, and specifically, the structure and the operation principle thereof are shown in the first embodiment and fig. 1 to 6, which are not described in detail herein.
EXAMPLE III
The embodiment of the utility model provides a dimming unit, please continue to refer to fig. 1, fig. 3, fig. 4 and fig. 5, the utility model provides a dimming unit is the dimming unit in embodiment one promptly, and the dimming unit with in embodiment one has the same structure, includes equally: free-form surface prism 301, first compensating prism 302 and second compensating prism 303, the difference lies in, the embodiment of the utility model provides a dimming unit can also be applied to in other lighting system, other types of ray apparatus, other imaging system, other optical path structures, specifically, can carry out adaptability design or adjustment according to the practical application scene. Wherein,
the free-form surface prism 301 includes at least: the working face comprises a first working face 3011, a second working face 3012 and a third working face 3013, wherein one edge of the second working face 3012 is connected with one edge of the first working face 3011, one edge of the third working face 3013 is connected with the other edge of the second working face 3012, and the other edge of the third working face 3013 is connected with the other edge of the first working face 3011;
the first compensation prism 302 includes at least: a first surface 3021 and a second surface 3022, an edge of the second surface 3022 being contiguous with an edge of the first surface 3021, the second surface 3022 having a face shape that is the same as the face shape of the second working surface 3012 and being configured to conform to the second working surface 3012;
the second compensating prism 303 includes at least: a third surface 3031 and a fourth surface 3032, wherein a seamed edge of the fourth surface 3032 is connected with a seamed edge of the third surface 3031, and the surface shape of the fourth surface 3032 is the same as the surface shape of the third working surface 3013 and is attached to the third working surface 3013.
In some embodiments, the first working surface 3011, the second working surface 3012, the third working surface 3013, the second surface 3022, and the fourth surface 3032 are all free-form surfaces, and the free-form surfaces are composed of a plurality of small facets, and in particular, the structure of the free-form surfaces may continue to refer to fig. 6, and the first surface 3021 and the third surface 3031 are all planar surfaces.
The embodiment of the utility model provides a when the lighting system of unit of adjusting luminance in using the ray apparatus that can greatly reduce the whole volume of ray apparatus, and the surface sets up two compensation prisms around the free-form surface prism, can avoid the influence of illuminating element to the formation of image light path. In other application scenarios, the setting position and the angle of the light modulation unit, the specific size parameters, the shape, the materials, etc. of the free-form surface prism 301, the first compensating prism 302 and the second compensating prism 303 in the light modulation unit can be adjusted according to the actual need under the condition of satisfying the above features, and do not need to be restricted by the embodiment of the present invention.
The embodiment of the utility model provides an in the ray apparatus, near-to-eye display device and unit of adjusting luminance is provided, this ray apparatus includes like source unit, lighting unit, unit and the formation of image unit of adjusting luminance, and this unit of adjusting luminance includes free-form surface prism, first compensation prism and second compensation prism, and this lighting unit can output the illumination light, and this unit of adjusting luminance can be with illumination light turn to like source unit, arouses like source unit to produce image light, and image light loops through the unit of adjusting luminance again and the formation of image is exported with the formation of image unit, the embodiment of the utility model provides a through setting up adjust luminance the unit, on the one hand can export the even light back of illumination light to like source unit, and on the other hand possesses the function of exporting the not equidirectional with image light and illumination light separation again, and the whole volume of ray apparatus is less, has compromise ray apparatus and near-to-eye display device's portability.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
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 it; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.
Claims (11)
1. An optical bench, comprising:
an image source unit for receiving the illumination light and generating and outputting image light;
an illumination unit for outputting the illumination light;
a light adjusting unit arranged at the light emitting sides of the illumination unit and the image source unit and comprising a free-form surface prism, a first compensating prism and a second compensating prism,
the illumination light is collimated and homogenized through the free-form surface prism and the first compensation prism and then is emitted to the image source unit, and the image light is output after the light emitting direction is adjusted through the first compensation prism, the free-form surface prism and the second compensation prism in sequence;
and the imaging unit is arranged on the light emitting side of the dimming unit and used for imaging the image light output by the dimming unit.
2. The optical bench of claim 1, wherein the freeform prism comprises at least:
the first working surface is arranged in the light outgoing direction of the illuminating unit and used for transmitting the illuminating light into the free-form surface prism;
a second working surface, one edge of which is connected with an edge of the first working surface, for reflecting the illumination light with an incident angle larger than a critical angle of total reflection when reaching the second working surface for one time, transmitting the illumination light with an incident angle smaller than the critical angle of total reflection when reaching the second working surface, and transmitting the image light;
and one edge of the third working surface is connected with the other edge of the second working surface, and the other edge of the third working surface is connected with the other edge of the first working surface, so that the illumination light after primary reflection is secondarily reflected to the second working surface, the incident angle of the illumination light after secondary reflection when reaching the second working surface is smaller than the critical angle of total reflection, and the image light is transmitted.
3. The light engine of claim 2,
the first working face, the second working face and the third working face are all free-form surfaces, and the free-form surfaces are composed of a plurality of small surface elements.
4. The optical machine of claim 2, wherein the first compensating prism comprises at least:
a first surface disposed toward the image source unit for transmitting the illumination light to the image source unit and the image light into the first compensation prism;
and a second surface, one edge of which is connected with one edge of the first surface, the surface type of which is the same as that of the second working surface, and the second surface is attached to the second working surface and is used for transmitting the illumination light and the image light.
5. The light engine of claim 4,
the first surface is a plane, the second surface is a free-form surface, and the free-form surface is composed of a plurality of small surface elements.
6. The optical bench of claim 2, wherein the second compensating prism comprises at least:
a third surface disposed toward the imaging unit for transmitting the image light out to the imaging unit;
and one edge of the fourth surface is connected with one edge of the third surface, the surface type of the fourth surface is the same as that of the third working surface, and the fourth surface is attached to the third working surface and used for transmitting the image light.
7. The light engine of claim 6,
the third surface is a plane, the fourth surface is a free-form surface, and the free-form surface is composed of a plurality of small surface elements.
8. The light engine according to any of the claims 1 to 7,
the imaging unit is a lens group, and the lens group at least comprises two imaging lenses.
9. A near-eye display device, comprising: the optical engine according to any one of claims 1 to 8, and a waveguide disposed in the light exit direction of the optical engine, wherein the waveguide is configured to output the imaging light beam output by the optical engine to the human eye for imaging.
10. A dimming cell, comprising: a free-form surface prism, a first compensating prism, and a second compensating prism, wherein,
the free-form surface prism includes at least: the working face comprises a first working face, a second working face and a third working face, wherein one edge of the second working face is connected with one edge of the first working face, one edge of the third working face is connected with the other edge of the second working face, and the other edge of the third working face is connected with the other edge of the first working face;
the first compensation prism includes at least: the surface type of the second surface is the same as that of the second working surface and is attached to the second working surface;
the second compensating prism includes at least: the surface type of the fourth surface is the same as that of the third working surface, and the fourth surface is attached to the third working surface.
11. The dimming unit of claim 10,
the first working surface, the second working surface, the third working surface, the second surface and the fourth surface are free-form surfaces, the free-form surfaces are composed of a plurality of small surface elements,
the first surface and the third surface are both planar.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116165804A (en) * | 2023-04-24 | 2023-05-26 | 杭州灵伴科技有限公司 | Optical display device and AR display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116165804A (en) * | 2023-04-24 | 2023-05-26 | 杭州灵伴科技有限公司 | Optical display device and AR display device |
| CN116165804B (en) * | 2023-04-24 | 2023-07-25 | 杭州灵伴科技有限公司 | Optical display device and AR display device |
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