Optical device having structure for improving imaging performance

Abstract

According to an embodiment of the present invention, an optical device may be provided, the optical device comprising: an image sensor including a plurality of pixels; a microlens array which is spaced apart from the image sensor and includes a plurality of microlenses disposed on one surface of a transparent substrate; and a first aperture layer and a second aperture layer disposed on both surfaces of the substrate and configured to limit the path of light passing through the microlens array, wherein the first aperture layer includes a plurality of entrance pupils corresponding to the plurality of microlenses, respectively, and the second aperture layer includes a plurality of exit pupils corresponding to the plurality of microlenses, respectively.

Description

An optical device having a structure for improving imaging performance

[0001] The present invention relates to an optical device for acquiring high-resolution images of close-range objects. More specifically, the present invention relates to an optical device comprising a microlens module for improving imaging performance.

[0002] Recently, research has been active on optical modules composed of microlens arrays (MLAs) for use in various displays and imaging devices. Technological advancements have been made, such as designing lens structures that mimic the structure of insect eyes using microlens arrays, thereby enabling the acquisition of distance information about objects using visual information acquired from various perspectives.

[0003] In particular, research is being conducted on packaging a microlens array with an image sensor to form a camera device to acquire more three-dimensional and accurate images of objects. However, such imaging devices are typically designed for specific purposes and are packaged to be optimized for imaging objects located at specific distances.

[0004] However, as the aperture is used to limit the amount of light to obtain high-resolution images, some pixels of the image sensor cannot be used for imaging, resulting in a loss of fill factor in the imaging device.

[0005] An object of the present invention is to provide an optical device that improves imaging performance.

[0006] Another object of the present invention is to provide an optical device having a structure for maximizing the utilization efficiency of pixels of an image sensor and the number of microlenses.

[0007] According to one embodiment, there is provided an image sensor comprising a plurality of pixels; a microlens array comprising a plurality of microlenses arranged spaced apart from the image sensor and arranged on one surface of a transparent substrate; and a first aperture layer and a second aperture layer positioned on both surfaces of the substrate and implemented to limit a path of light passing through the microlens array. An optical device may be provided, wherein the first aperture layer includes a plurality of entrance pupils corresponding to each of the plurality of microlenses, the second aperture layer includes a plurality of exit pupils corresponding to each of the plurality of microlenses, and a field of view on an image plane corresponding to the image sensor, the field of view being defined as an area in which light reflected from an object can reach by passing through the entrance pupil, an exit pupil corresponding to the entrance pupil, and the microlenses, and the field of view includes an imaging area for acquiring an image of the object based on the received light, and a boundary area between an edge of the imaging area and an edge of the field of view, and the microlens array includes a first microlens and a second microlens, and the first microlens and the second microlens are arranged to be spaced apart from each other by a first distance, such that at least a portion of the first boundary area corresponding to the first microlens and at least a portion of the second boundary area corresponding to the second microlens overlap.

[0008] The solutions to the problems of the present invention are not limited to the solutions described above, and solutions not mentioned can be clearly understood by a person having ordinary skill in the art to which the present invention pertains from this specification and the attached drawings.

[0009] An optical device according to one embodiment of the present invention can improve imaging performance.

[0010] An optical device according to one embodiment of the present invention can maximize the utilization efficiency of pixels of an image sensor and the number of microlenses.

[0011] The effects of the present invention are not limited to the effects described above, and effects not mentioned can be clearly understood by a person having ordinary skill in the art to which the present invention pertains from this specification and the attached drawings.

[0012] FIG. 1 is a drawing for explaining an optical system included in an optical device according to various embodiments.

[0013] FIGS. 2A to 2C are drawings illustrating lens designs considering optical paths according to various embodiments.

[0014] FIG. 3 is a diagram illustrating image areas on an image plane of an optical device according to various embodiments.

[0015] FIG. 4 is a drawing for explaining the structure of an optical system included in an optical device according to various embodiments.

[0016] FIG. 5 is a drawing for explaining an optical device having a light emitting unit according to various embodiments.

[0017] FIG. 6 is a diagram illustrating an example for packaging an optical device according to various embodiments.

[0018] FIG. 7 is a drawing for explaining the difference in imaging performance according to the packaging method of the optical device according to various embodiments.

[0019] According to one embodiment, there is provided an image sensor comprising a plurality of pixels; a microlens array comprising a plurality of microlenses arranged spaced apart from the image sensor and arranged on one surface of a transparent substrate; and a first aperture layer and a second aperture layer positioned on both surfaces of the substrate and implemented to limit a path of light passing through the microlens array. An optical device may be provided, wherein the first aperture layer includes a plurality of entrance pupils corresponding to each of the plurality of microlenses, the second aperture layer includes a plurality of exit pupils corresponding to each of the plurality of microlenses, and a field of view on an image plane corresponding to the image sensor, the field of view being defined as an area in which light reflected from an object can reach by passing through the entrance pupil, an exit pupil corresponding to the entrance pupil, and the microlenses, and the field of view includes an imaging area for acquiring an image of the object based on the received light, and a boundary area between an edge of the imaging area and an edge of the field of view, and the microlens array includes a first microlens and a second microlens, and the first microlens and the second microlens are arranged to be spaced apart from each other by a first distance, such that at least a portion of the first boundary area corresponding to the first microlens and at least a portion of the second boundary area corresponding to the second microlens overlap.

[0020] An optical device according to one embodiment may be designed such that light scattered from an object sequentially passes through the first aperture layer, the transparent substrate, the second aperture layer, and at least one microlens and is directed to the image sensor.

[0021] An optical device according to one embodiment can adjust the field of view by adjusting the size of a plurality of entrance pupils or the size of a plurality of exit pupils.

[0022] The boundary region can be set as an area where imaging is impossible due to a small amount of light reaching it or the light being out of focus.

[0023] The imaging area may include an area where the amount of light is sufficient and an area where the amount of light is limited by the edge of the entrance pupil.

[0024] An optical device according to one embodiment can adjust the size of an area where the first boundary region and the second boundary region overlap by adjusting the size of a plurality of entrance pupils or the size of the plurality of exit pupils.

[0025] The optical device may be designed such that the first imaging area corresponding to the first microlens and the second boundary area corresponding to the second microlens do not overlap.

[0026] The distance between adjacent microlenses can be determined based on the adjacent boundary regions.

[0027] The first aperture layer may be made of metal, and at least one organic light-emitting diode (OLED) may be disposed on one surface of the first aperture layer, and the organic light-emitting diode may be implemented to emit light outside the optical device.

[0028] An optical device according to one embodiment further comprises a light blocking material for blocking ambient light, wherein the light blocking material can be sealed around the image sensor or the microlens array.

[0029] Since the embodiments described in this specification are intended to clearly explain the idea of ​​the present invention to a person having ordinary skill in the art to which the present invention pertains, the present invention is not limited to the embodiments described in this specification, and the scope of the present invention should be interpreted to include modified or altered examples that do not depart from the idea of ​​the present invention.

[0030] The terms used in this specification have been selected from widely used terms, taking into account the functions of the present invention. However, these terms may vary depending on the intentions of those skilled in the art, precedents, or the emergence of new technologies. However, if a specific term is defined and used with an arbitrary meaning, the meaning of that term will be described separately. Therefore, the terms used in this specification should be interpreted based on the actual meaning of the term and the overall content of this specification, rather than simply the name of the term.

[0031] The drawings attached to this specification are intended to facilitate explanation of the present invention, and the shapes depicted in the drawings may be exaggerated as necessary to help understand the present invention, and therefore the present invention is not limited by the drawings.

[0032] If a detailed description of the composition or function of a known disclosure related to the present invention in this specification is deemed to obscure the gist of the present invention, a detailed description thereof will be omitted as necessary. Furthermore, the numbers (e.g., "first," "second," etc.) used throughout the description of this specification are merely identifiers used to distinguish one component from another.

[0033] In addition, the suffixes "part" and "part" for components used in the following description are given or used interchangeably only for the convenience of writing the specification, and do not have distinct meanings or roles in themselves.

[0034]

[0035] FIG. 1 is a drawing for explaining an optical system included in an optical device according to various embodiments.

[0036] Referring to FIG. 1, the optical device (100) may include an optical system for obtaining an image of an object based on light reflected from the object.

[0037] Specifically, the optical device (100) may include an image sensor (110) including a plurality of pixels, a microlens array (120), a transparent substrate (glass wafer, 130), and at least one aperture layer (140, 150). In addition, although not shown in FIG. 1, the optical device (100) may further include general components included in an optical system for acquiring an image of an object. For example, the optical device (100) may further include at least one processor that processes electrical signals generated based on the image sensor to generate an image of the object. In addition, the optical device (100) may further include a memory that stores the electrical signals generated from the image sensor and the images generated from the at least one processor.

[0038] An image sensor (110) may include a plurality of pixels for receiving light and outputting an electrical image signal. The image sensor (110) may acquire an image corresponding to an object based on pixel values ​​output by the plurality of pixels.

[0039] A microlens array (MLA, Microlens Array, 120) may include a plurality of microlenses arranged in an array form. For example, it may include, but is not limited to, a first microlens (121), a second microlens (122), and a third microlens (123) arranged in a first direction.

[0040] The microlens array (120) may be arranged on one surface of the transparent substrate (130). In addition, the microlens array (120) may be arranged at a predetermined distance from the image sensor (110). Specifically, the microlens array (120) may be arranged on one surface of the transparent substrate (130) such that the refractive portions of the plurality of microlenses (e.g., convex portions in the case of a convex lens, concave portions in the case of a concave lens) face the image sensor (110).

[0041] At least one aperture layer (140, 150) can limit the amount of light received or the path of the light. Specifically, at least one aperture layer (140, 150) can be implemented to include at least one pupil so that light can pass through at least one pupil. For example, at least one aperture layer (140, 150) can be a metal layer having at least one pore formed therein. In this case, at least one pore formed in the metal layer can have a circular shape, and the longitudinal and transverse spacing between the pores can be formed equally, so that the pore pattern can be formed in a matrix shape.

[0042] The optical device (100) may include a first aperture layer (140) and a second aperture layer (150) for controlling a field of view and amount of light received. Specifically, the optical device (100) may include a first aperture layer (140) and a second aperture layer (150) arranged on both sides of a transparent substrate (130). For example, the second aperture layer (150) may be arranged on one side of the transparent substrate (130) on which the microlens array (120) is arranged, and the first aperture layer (140) may be arranged on the other side of the transparent substrate (130). For example, the optical device (100) may be designed such that light (1) reflected from an object surface sequentially passes through the first aperture layer (140), the transparent substrate (130), the second aperture layer (150), and the microlens array (120) to be directed to at least one pixel included in the image sensor.

[0043] At least one aperture layer (140, 150) may include at least one pupil. Specifically, a first aperture layer (140) positioned from the transparent substrate (130) toward the outside of the device may include at least one entrance pupil (145) defining a path for light to be received. In addition, a second aperture layer (150) positioned from the transparent substrate (130) toward the inside of the device may include at least one exit pupil (155) defining a path for light to be received.

[0044] At this time, each of the plurality of entrance pupils included in the first aperture layer (140) may correspond to each of the plurality of microlenses included in the microlens array (120). In addition, each of the plurality of exit pupils included in the second aperture layer (150) may correspond to each of the plurality of microlenses included in the microlens array (120). The entrance pupil (145) and the exit pupil (155) may form an aperture to limit the amount of light to be received by the image sensor. Through this, the optical device (100) may be designed so that light (1) reflected from the object surface sequentially passes through the entrance pupil (145), the transparent substrate (130), the exit pupil (155), and the microlens (121) and is directed to at least one pixel included in the image sensor.

[0045] The components constituting the optical system can form a light-absorbing layer to reduce optical trostok by blocking light around the lens, and the light-absorbing layer can further include a dielectric layer (e.g., photoresist, silicon (Si), germanium (Ge), gallium arsenide (GaAs), iron oxide (FexOy), silicon oxide, silicon nitride, titanium oxide, and titanium nitride, metal (Cr, Al, etc.) or a combination thereof), or a coating layer formed by thermal reflow, etc.

[0046] In the present disclosure, at least a portion of the entrance pupil (145), the exit pupil (155) and the image sensor (110) corresponding to one microlens (121) can be defined as a unit optical system (200).

[0047] Below, the detailed design structure of the unit optical system (200) is described, and based on this, the structure of the optical device that improves imaging performance by minimizing the loss of fill factor is described.

[0048]

[0049] FIGS. 2A to 2C are drawings illustrating lens designs considering optical paths according to various embodiments.

[0050] FIG. 3 is a diagram illustrating image areas on an image plane of an optical device according to various embodiments.

[0051] Light reflected (or scattered) from the object plane can reach the image plane corresponding to the image sensor through the unit optical system.

[0052] In the present disclosure, at least one area where light reflected from an object area (OP1, OP2, OP3, 쪋) reaches the image plane is defined as follows.

[0053] The area that light reflected from an object area included in the maximum field of view can reach on the image plane is called the field of view.

[0054] Additionally, within the field of view, the region where an image of an object can be generated is called the imaging region. For example, the imaging region may be, but is not limited to, the region where light is received and reaches more than half of the lens. Furthermore, the imaging region may include a region with sufficient light and good focus (a high-resolution region) and a region where the amount of light is limited by the edge of the pupil.

[0055] Additionally, within the field of view, the region where an image of an object cannot be generated is called the boundary region. For example, the boundary region may refer to a region where imaging of an object is impossible due to insufficient light reaching the image and poor focus.

[0056]

[0057] Referring to FIG. 2A, the unit optical system (200) can be implemented so that light scattered from a first object area (OP1) on an object plane reaches a first imaging area (IP1) through a microlens (ML). At this time, light rays included in the beam of light scattered from the first object area (OP1) can pass through a first edge (211) (e.g., UXP, upper exit pupil) and a second edge (212) (e.g., LXP, lower exit pupil) of an exit pupil (210) to form a boundary of the first imaging area (IP1).

[0058] Additionally, light scattered from the first object area (OP1) can reach the first imaging area (IP1) by being limited in quantity through the entire edge area of ​​the exit pupil. Additionally, at least a portion of the light rays included in the beam of light scattered from the first object area (OP1) can pass through the microlens center and reach the first imaging area (IP1).

[0059] Since the light reaching the first imaging area (IP1) has a sufficient amount of light with little loss, the image sensor can receive the light reaching the first imaging area (IP1) and obtain a high-resolution image.

[0060]

[0061] Referring to FIG. 2b, the unit optical system (200) can be implemented so that light scattered from the second object area (OP2) on the object plane reaches the second imaging area (IP2) through the microlens (ML).

[0062] The second imaging area (IP2) may be an area where an image of an object can be acquired based on the arriving light.

[0063] For example, light scattered in the second object area (OP2) can reach the second imaging area (IP2) by forming a path between a first path connecting a first edge (221) of the entrance pupil (220) (e.g., UNP, upper entrance pupil) and the center (LC) of the microlens and a second path connecting a second edge (222) of the entrance pupil (220) (e.g., LNP, lower entrance pupil) and the center (LC) of the microlens.

[0064] In addition, light scattered in an area of ​​the second object area (OP2) excluding the first object area (OP1) may reach the image plane with the light quantity limited by the entrance pupil (220). Light scattered in an area of ​​the second object area (OP2) excluding the first object area (OP1) may reach an area of ​​the second imaging area (IP2) excluding the first imaging area (IP1). That is, an area of ​​the second imaging area (IP2) excluding the first imaging area (IP1) may be an area in which the light quantity is limited by the edge of the pupil.

[0065] Additionally, the second imaging area (IP2) may include the first imaging area (IP1). The second imaging area (IP2) includes the first imaging area (IP1) capable of acquiring a high-resolution image and an area in which the amount of light is limited.

[0066]

[0067] Referring to FIG. 2c, the unit optical system (200) can be implemented so that light scattered from the third object area (OP3) on the object plane reaches the second imaging area (IP2) or the boundary area (IP3) through the microlens (ML).

[0068] Specifically, the unit optical system (200) can be implemented so that light scattered in an area excluding the second object area (OP2) among the third object areas (OP3) on the object plane reaches the boundary area (IP3) through the microlens (ML).

[0069] The boundary region (IP3) may be an area where it is impossible to obtain an image of an object even if light reaches it.

[0070] For example, light scattered in the third object area (OP3) can reach the second imaging area (IP2) or boundary area (IP3) by forming a path between a first path connecting the first edge (221) of the entrance pupil (220) and the second edge (212) of the exit pupil (210) and a second path connecting the second edge (222) of the entrance pupil (220) and the first edge (211) of the exit pupil (210).

[0071] Specifically, light scattered in the third object area (OP3) can reach the boundary area (IP3) by forming a path between a path connecting a first edge (221) of the entrance pupil (220) and a second edge (212) of the exit pupil (210) and a path connecting the first edge (221) of the entrance pupil (220) and the center (LC) of the microlens, or a path connecting the second edge (222) of the entrance pupil (220) and the first edge (211) of the exit pupil (210) and a path connecting the second edge (222) of the entrance pupil (220) and the center (LC) of the microlens.

[0072] Light reaching the boundary region (IP3) is limited in amount by the pupils and is out of focus, so the image sensor cannot acquire an image of the object based on the light reaching the boundary region (IP3).

[0073] In order to solve the problem that the area that can be used for actual image processing is limited because the resolution decreases from the center to the periphery when shooting with a lens array, it is necessary to design image areas on the image plane in detail according to the object area where light is scattered, as shown in FIGS. 2a to 2c.

[0074] Additionally, by overlapping the image-imaging-unavailable areas (e.g., boundary areas) corresponding to each adjacent lens, the wasted image sensor area can be utilized, thereby improving the fill factor and utilizing more lenses to improve the quality of the restored image.

[0075] Additionally, the optical device can control the overlapping area by adjusting the angle of view using aperture layers arranged on both sides of the wafer.

[0076] Specifically, the optical device can adjust the angle of view by adjusting the size of the pupil of at least one aperture layer.

[0077] For example, referring to (a) and (b) of FIG. 3, the diameter of the field of view can be adjusted from a first diameter (D1) to a second diameter (D2) by adjusting the size of the entrance pupil (301). Accordingly, the size of the imaging area and the size of the boundary area can be adjusted, and the size of the overlapping area with the field of view of an adjacent lens can be adjusted.

[0078] Additionally, for example, referring to (a) and (c) of FIG. 3, the diameter of the field of view can be adjusted from the first diameter (D1) to the third diameter (D3) by adjusting the size of the exit pupil (303). Accordingly, the size of the boundary region can be adjusted, and the size of the overlapping region with the field of view of an adjacent lens can be adjusted.

[0079]

[0080] Below, we describe a method for designing optimal spacing between lenses to improve fill factor by utilizing the overlap of boundary areas with adjacent lenses.

[0081]

[0082] FIG. 4 is a drawing for explaining the structure of an optical system included in an optical device according to various embodiments.

[0083] Referring to FIG. 4, the optical device (400) may include an image sensor (410), a substrate (420), a microlens array (MLA), a first aperture layer (430) and a second aperture layer (440) disposed on both sides of the substrate (420). At this time, the first aperture layer (430) may include at least one entrance pupil (435), and the second aperture layer (440) may include at least one exit pupil (445).

[0084] Additionally, the microlens array (MLA) may include first microlenses (401) and second microlenses (402) arranged adjacently.

[0085] The optical device can determine the separation distance between microlenses by considering the imageable area of ​​each microlens included in the microlens array (MLA). Specifically, the separation distance (P) between the adjacent first microlens (401) and second microlens (402) can be determined based on the overlapping area between the field of view corresponding to the first microlens and the field of view corresponding to the second microlens.

[0086] For example, light passing through the first microlens (401) and directed to the image sensor can reach a first field of view that includes a first imaging area (IP21) and a first boundary area (IP31). In addition, light passing through the second microlens (402) and directed to the image sensor can reach a second field of view that includes a second imaging area (IP22) and a second boundary area (IP32).

[0087] Details on the imaging area and boundary area have been described above, so they will be omitted.

[0088] In this case, the optical device (400) may be designed such that at least a portion of the first viewing area and at least a portion of the second viewing area overlap. Specifically, the optical device (400) may be designed such that at least a portion of the first boundary area (IP31) and at least a portion of the second boundary area (IP32) overlap.

[0089] Additionally, the optical device (400) can determine the separation distance between adjacent lenses so that the overlapping area between the boundary areas of each of the adjacent lenses is maximized.

[0090] Specifically, as the first microlens (401) and the second microlens (402) are arranged at a first distance (P) apart from each other, at least a portion of the first boundary area (IP31) corresponding to the first microlens (401) and at least a portion of the second boundary area (IP32) corresponding to the second microlens (402) may overlap.

[0091] Additionally, the optical device (400) may be designed so that the overlapping region is not formed in the imaging region. This is because, if a specific boundary region overlaps with the imaging region of an adjacent lens, two pieces of information may be contained in one pixel, which may result in noise.

[0092] Additionally, the optical device (400) can adjust the angle of view by adjusting the size of at least one entrance pupil (435) or the size of at least one exit pupil (445), thereby adjusting the overlapping area.

[0093] In designing the optical system of an optical device, the first aperture layer (430) and the second aperture layer (440) can be used to adjust the area where the image is formed, the imaging area can be used for imaging, and the boundary area can be used to calculate the minimum distance from adjacent lenses.

[0094] Accordingly, the fill factor of the optical device can be improved and the number of available lenses can be increased, thereby improving the quality of the restored image being imaged.

[0095]

[0096] FIG. 5 is a drawing for explaining an optical device having a light emitting unit according to various embodiments.

[0097] Referring to FIG. 5, an optical device (500) according to one embodiment may further include a light-emitting unit (550). Specifically, the light-emitting unit (550) may include at least one light-emitting element (e.g., a light-emitting diode) that generates light.

[0098] At this time, the light emitting unit (550) may be provided on one surface of the first aperture layer (see 430 of FIG. 4). Specifically, the first aperture layer may be implemented as a metal layer (METAL), and an organic light emitting diode (OLED) may be arranged on one surface of the first aperture layer. In addition, in this case, the organic light emitting diode (OLED) may be implemented to emit light to the outside. For example, the organic light emitting diode (OLED) may be composed of a cathode layer, an electron injection layer (EIL), an electron transport layer (ETL), an emission layer (EML), a hole transport layer (HTL), a hole injection layer (HIL), an anode layer, etc. In addition, the light emitting unit (550) may be implemented to emit light of various colors by controlling the emitted energy.

[0099] Since the OLED substrate has a metal layer on its lower surface, the first aperture layer of the optical device can be utilized as an OLED substrate. This provides an optical device (500) comprising an ultra-small optical system capable of simultaneous illumination and imaging.

[0100]

[0101] FIG. 6 is a diagram illustrating an example for packaging an optical device according to various embodiments.

[0102] FIG. 7 is a drawing for explaining the difference in imaging performance according to the packaging method of the optical device according to various embodiments.

[0103] Referring to FIG. 6, the optical device (600) may include a frame (610) in which an image sensor (611) is arranged and a microlens array (620). In addition, the optical device (600) may further include a light blocking material (615) for blocking ambient light. Specifically, the optical device (600) may prevent the inflow of ambient light by arranging the light blocking material (615) around the image sensor (611) and the microlens array (620). For example, the light blocking material (615) may be composed of an epoxy-based material, but is not limited thereto.

[0104] Referring to FIG. 7, a first image in which the light blocking material (615) is not sealed (opened) and a second image in which the light blocking material (615) is sealed (blocked) can be confirmed.

[0105] The first image shows a blurred image created by allowing ambient light in, while the second image shows an image with improved contrast created by blocking ambient light.

[0106]

[0107] Although the embodiments described above have been described by way of limited examples and drawings, those skilled in the art will appreciate that various modifications and variations can be made based on the above teachings. For example, appropriate results can still be achieved even if the described techniques are performed in a different order than described, and / or components of the described systems, structures, devices, circuits, etc. are combined or combined in a different manner than described, or are replaced or substituted with other components or equivalents.

[0108] Therefore, other implementations, other embodiments, and equivalents to the claims also fall within the scope of the claims described below.

Claims

1. In optical devices, An image sensor comprising multiple pixels; A microlens array comprising a plurality of microlenses arranged spaced apart from the image sensor and arranged on one surface of a transparent substrate; and A first aperture layer and a second aperture layer positioned on both sides of the substrate and implemented to limit the path of light passing through the microlens array; The first aperture layer includes a plurality of entrance pupils corresponding to each of the plurality of microlenses, The second aperture layer includes a plurality of exit pupils corresponding to each of the plurality of microlenses, A field of view on an image plane corresponding to the image sensor, wherein the field of view is defined as an area where light reflected from an object can reach by passing through the entrance pupil, the exit pupil corresponding to the entrance pupil, and the microlens, and includes an imaging area for obtaining an image of the object based on the received light, and a boundary area between an edge of the imaging area and an edge of the field of view, The above microlens array includes a first microlens and a second microlens, As the first microlens and the second microlens are arranged at a first distance apart, at least a part of the first boundary area corresponding to the first microlens and at least a part of the second boundary area corresponding to the second microlens overlap. Optical devices.

2. In paragraph 1, It is characterized in that the light scattered from the object is designed to sequentially pass through the first aperture layer, the transparent substrate, the second aperture layer, and at least one microlens and is directed to the image sensor. Optical devices.

3. In paragraph 1, characterized in that the viewing angle is adjusted by adjusting the size of the plurality of entrance pupils or the size of the plurality of exit pupils. Optical devices.

4. In paragraph 1, The above boundary area is characterized in that it is set as an area where imaging is impossible due to a small amount of light reaching it or the light being out of focus. Optical devices.

5. In paragraph 1, The imaging area includes an area where the amount of light is sufficient and an area where the amount of light is limited by the edge of the entrance pupil. Optical devices.

6. In paragraph 1, Characterized in that the size of the area where the first boundary area and the second boundary area overlap is adjusted by adjusting the size of the plurality of inlet cavities or the size of the plurality of exit cavities. Optical devices.

7. In paragraph 1, The first imaging area corresponding to the first microlens and the second boundary area corresponding to the second microlens are characterized in that they do not overlap. Optical devices.

8. In paragraph 1, The first distance is characterized in that it is determined based on the first boundary area and the second boundary area. Optical devices.

9. In paragraph 1, The above first aperture layer is composed of metal, At least one organic light emitting diode (OLED) is arranged on one surface of the first aperture layer, and the organic light emitting diode is characterized in that it is implemented to emit light outside the optical device. Optical devices.

10. In paragraph 1, Further comprising a light blocking material to block ambient light, The above light blocking material is characterized in that it is sealed around the image sensor or the microlens array. Optical devices.

11. Optical device according to paragraph 1; and A light emitting unit disposed in a first aperture layer included in the optical device; Optical system.

Images