Device for optimizing diffraction optical waveguide imaging uniformity through photonic crystal film

Abstract

The utility model discloses a device for optimizing diffraction optical waveguide imaging uniformity through a photonic crystal film, and relates to the technical field of diffraction optical waveguide imaging. The transparent part is used as a waveguide, the radio frequency source is used for sending light, a coupling-in grating and a coupling-out grating are arranged below the transparent part, first coating films are arranged on the periphery of the transparent part, and a reflection space for reflecting the light is reserved between the coupling-in grating and the coupling-out grating. According to the utility model, the photonic crystal film is placed on the opposite side of the coupling-in grating. Incident light firstly passes through the photonic crystal film before entering the waveguide. The photonic crystal film modulates the light by changing the path and characteristics of the incident light. The light distribution is homogenized by the modulation effect, so that the problem of non-uniformity of pictures in a diffraction optical waveguide scheme is solved.

Description

Technical Field

[0001] The utility model belongs to the field of diffraction light waveguide imaging, in particular to a device for optimizing the uniformity of diffraction light waveguide imaging by using a photonic crystal film. Background Art

[0002] Diffraction optical waveguide technology is a popular technology in the field of augmented display. The functions of the augmented display field (AR) are mainly realized by superimposing virtual information on the real world through computer technology, thereby providing users with a rich immersive experience.

[0003] The existing technologies for realizing AR mainly include: Birdbath, off-axis reflection and optical waveguide solutions (diffraction optical waveguide, geometric optical waveguide), etc.

[0004] Diffractive light waveguide technology is widely used in augmented reality (AR) glasses. In the current consumer AR glasses market, this technology is the most popular choice, and many well-known AR manufacturers have adopted this technology. However, there are some common problems with this technology, especially brightness non-uniformity and color non-uniformity. Brightness non-uniformity can lead to significant differences in display effects, which in turn affects the user's visual experience. This problem is particularly prominent in diffractive light waveguide technology. Due to the uneven brightness of the RGB primary colors (red, green, and blue) when displayed, the color performance will be inconsistent. In fact, the problem of color non-uniformity can be attributed to brightness non-uniformity.

[0005] In view of this, the present utility model is proposed. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a device for optimizing the uniformity of diffraction optical waveguide imaging by a photonic crystal film, thereby solving the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0008] A device for optimizing the imaging uniformity of a diffraction light waveguide by using a photonic crystal film, comprising: a transparent member as a waveguide and a radio frequency source for transmitting incident light, an in-coupling grating and an out-coupling grating are arranged below the transparent member, a first coating is arranged around the transparent member, and a reflection space for reflecting incident light is reserved between the in-coupling grating and the out-coupling grating;

[0009] A photonic crystal film corresponding to the coupling-in grating is arranged above the transparent member, and the photonic crystal film faces the radio frequency source for receiving incident light;

[0010] A plurality of holes evenly arranged on the surface of the photonic crystal film are penetrated and opened on the opposite side of the photonic crystal film, and a second coating film for shielding the holes is arranged on the side of the photonic crystal film away from the coupling-in grating.

[0011] Optionally, the hole of the photonic crystal film is in a triangular shape, and the second coating film sinks inside the triangular hole.

[0012] Optionally, the coupling-in grating and the coupling-out grating include a straight plate, and a plurality of triangular blocks for reflecting incident light are arranged in a rectangular arrangement on one side of the straight plate facing the photonic crystal film.

[0013] Optionally, the incident light is reflected at the front and back of the interior of the transparent member, and the reflection path of the incident light is zigzag-shaped.

[0014] Optionally, the transparent member is a flat glass, and the areas of the photonic crystal film, the coupling-in grating and the coupling-out grating are the same.

[0015] Optionally, the colors of the first coating and the second coating include but are not limited to gray, transparent, and black.

[0016] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art. Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described below at the same time:

[0017] The present invention is placed on the opposite side of the coupling grating through the photonic crystal film. Before the incident light enters the waveguide, it first passes through the photonic crystal film. The photonic crystal film modulates the light by changing the path and characteristics of the incident light. This modulation effect uniformizes the distribution of the light, thereby solving the problem of image non-uniformity in the diffraction light waveguide solution.

[0018] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] In the figure:

[0021] Figure 1 This is one of the three-dimensional schematic diagrams of the diffraction light waveguide imaging uniformity device;

[0022] Figure 2 This is the second three-dimensional schematic diagram of the diffraction light waveguide imaging uniformity device;

[0023] Figure 3 This is one of the three-dimensional schematic diagrams of photonic crystal films;

[0024] Figure 4 is a three-dimensional schematic diagram of the second coating;

[0025] Figure 5 This is the second three-dimensional schematic diagram of the photonic crystal film;

[0026] Figure 6 It is a schematic diagram of a top view of a diffraction light waveguide imaging uniformity device;

[0027] Figure 7 This is the third three-dimensional schematic diagram of the diffraction light waveguide imaging uniformity device.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1. Transparent part; 2. In-coupling grating; 3. Out-coupling grating; 4. First coating; 5. Photonic crystal film; 6. Second coating; 7. Straight plate; 8. Triangular block.

[0030] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0031] The utility model will now be further described in detail with reference to the accompanying drawings.

[0032] See also Figure 1-7 As shown, in this embodiment, a device for optimizing the uniformity of imaging of a diffraction light waveguide by a photonic crystal film is provided, including a transparent member 1 as a waveguide and a radio frequency source for transmitting incident light, a coupling-in grating 2 and a coupling-out grating 3 are arranged below the transparent member 1, and a photonic crystal film 5 is used to adjust and homogenize the incident light, and the photonic crystal film 5 can significantly improve the brightness non-uniformity of waveguide imaging and improve the imaging quality. A first coating 4 is arranged on all sides of the transparent member 1, and the first coating 4 of the transparent member 1 is used to enhance the reflection effect and sealing, reduce light loss, and a reflection space for the incident light to reflect is reserved between the coupling-in grating 2 and the coupling-out grating 3; the reflection space provides a path for the light to propagate in the system, so that the light can propagate in the waveguide through total reflection, thereby improving the light utilization efficiency.

[0033] A photonic crystal film 5 corresponding to the coupling grating 2 is arranged above the transparent member 1, and the photonic crystal film 5 faces the radio frequency source for receiving incident light; the position and functional setting of the photonic crystal film 5 optimizes the light coupling process, reduces the loss and interference in light transmission, and thus improves the overall performance of the system.

[0034] The opposite side of the photonic crystal film 5 is penetrated by a number of holes evenly arranged on the surface of the photonic crystal film 5. The holes are used to adjust the light. The uniform hole design of the photonic crystal film 5 makes the light more uniform when entering the waveguide, thereby improving the brightness uniformity and quality of the imaging. The side of the photonic crystal film 5 away from the coupling grating 2 is provided with a second coating 6. The light first passes through the photonic crystal film 5, then passes through the diffraction grating to enter the waveguide, propagates through total reflection, and finally emits through the coupling grating 3.

[0035] In this embodiment, the photonic crystal film 5 includes a hole in the photonic crystal film 5 in a triangular shape, and the second coating 6 is sunken inside the triangular hole. The second coating 6 sunk inside the hole helps to stabilize the path of light, reduce loss and interference during light transmission, and thus improve imaging quality.

[0036] In this embodiment, the coupling-in grating 2 and the coupling-out grating 3 include a straight plate 7, and a plurality of triangular blocks 8 for reflecting incident light are arranged in a rectangular pattern on one side of the straight plate 7 facing the photonic crystal film 5. The arrangement of the triangular blocks 8 helps to accurately control the reflection angle and path of the light in the optical waveguide system, thereby improving the efficiency and uniformity of light transmission. The rectangularly arranged triangular blocks 8 can provide a uniform reflection surface, reducing the loss and interference of light during transmission.

[0037] In this embodiment, the incident light is reflected at the front and back of the transparent member 1, and the reflection path of the incident light is zigzag. The zigzag reflection path helps to identify and reduce the loss in the light transmission process, and optimizes the overall transmission efficiency and imaging quality of the optical waveguide system.

[0038] In this embodiment, the transparent member 1 is a flat glass, and the photonic crystal film 5 has the same area as the coupling-in grating 2 and the coupling-out grating 3. By ensuring that the areas of the photonic crystal film 5 and the grating are the same, optical loss and reduced efficiency due to area mismatch can be avoided. Light can be more evenly distributed during transmission and coupling, improving the uniformity and stability of light transmission.

[0039] In this embodiment, the colors of the first coating 4 and the second coating 6 include but are not limited to gray, transparent, and black.

[0040] The photonic crystal film 5 is placed on the opposite side of the coupling grating 2. Before the incident light enters the waveguide, it first passes through the photonic crystal film 5. The photonic crystal film 5 modulates the light by changing the path and characteristics of the incident light. This modulation effect uniformizes the distribution of the light, thereby solving the problem of image non-uniformity in the diffraction light waveguide solution.

[0041] Working principle: The light emitted by the RF source first enters the waveguide system through the photonic crystal film 5. After passing through the photonic crystal film 5, the light enters the transparent part 1 and passes through the coupling grating 2 to undergo multiple total reflections in a zigzag path between the front and back surfaces of the transparent part 1. After multiple total reflections in the waveguide, the light finally reaches the coupling grating 3. The coupling grating 3 allows the light to be emitted from the waveguide and enter the human eye to form the final image.

[0042] The present invention is not limited to the above-mentioned implementation modes. Anyone should be aware of the structural changes made under the inspiration of the present invention. Any technical solution that is the same or similar to the present invention falls within the protection scope of the present invention. The technology, shape, and structure that are not described in detail in the present invention are all known technologies.

Claims

1. A device for optimizing the uniformity of diffraction optical waveguide imaging using a photonic crystal film, characterized in that: include: A transparent member (1) serving as a waveguide and a radio frequency source for transmitting incident light, an in-coupling grating (2) and an out-coupling grating (3) are arranged below the transparent member (1), a first coating (4) is arranged around the transparent member (1), and a reflection space for reflecting incident light is reserved between the in-coupling grating (2) and the out-coupling grating (3); A photonic crystal film (5) corresponding to the coupling-in grating (2) is arranged above the transparent member (1), and the photonic crystal film (5) faces the radio frequency source and is used to receive incident light; A plurality of holes evenly arranged on the surface of the photonic crystal film (5) are penetrated on the opposite side of the photonic crystal film (5), and a second coating (6) for shielding the holes is arranged on the side of the photonic crystal film (5) away from the coupling-in grating (2).

2. The device for optimizing the uniformity of diffraction optical waveguide imaging by using a photonic crystal film according to claim 1, characterized in that: The hole of the photonic crystal film (5) is in the shape of a triangle, and the second coating film (6) sinks inside the triangular hole.

3. The device for optimizing the uniformity of diffraction optical waveguide imaging by using a photonic crystal film according to claim 1, characterized in that: The coupling-in grating (2) and the coupling-out grating (3) comprise a straight plate (7), and a plurality of triangular blocks (8) for reflecting incident light are arranged in a rectangular arrangement on one side of the straight plate (7) facing the photonic crystal film (5).

4. The device for optimizing the uniformity of diffraction optical waveguide imaging by using a photonic crystal film according to claim 1, characterized in that: The incident light is reflected at the front and back of the interior of the transparent member (1), and the reflection path of the incident light is in a sawtooth shape.

5. The device for optimizing the uniformity of diffraction optical waveguide imaging by using a photonic crystal film according to claim 1, characterized in that: The transparent member (1) is a flat glass, and the photonic crystal film (5) and the coupling-in grating (2) and the coupling-out grating (3) have the same area.

6. The device for optimizing the uniformity of diffraction optical waveguide imaging by using a photonic crystal film according to claim 1, characterized in that: The colors of the first coating (4) and the second coating (6) include gray, transparent, and black.

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