Anti-Reflection Optical Unit for Camera Device

Abstract

An anti-reflection optical unit for a camera device according to the present invention may include an anti-reflection module comprising: a substrate having transparency in a visible light region, provided on an outermost optical element of a camera device to which an anti-reflection coating is not applied; a substrate adhesive portion having transparency in a visible light region and provided between the substrate and the outermost optical element to mutually bond the outermost optical element and the substrate; and a first anti-reflection coating layer formed on the upper surface of the substrate to reduce light reflectance occurring at the interface between the substrate and an external air layer, thereby improving the total transmittance of the camera device.

Description

Technology Field

[0001] The present invention relates to an optical unit for improving the optical performance of a camera device, and more specifically, to an optical unit provided on the outermost optical element of a camera device to prevent light reflection and provide a protective function. Background Technology

[0002] With the recent popularization of smartphones, cameras are no longer the exclusive domain of professionals or photography enthusiasts but have become an essential part of daily life. In particular, smartphone cameras offer optical performance comparable to professional cameras through continuous technological advancements, and coupled with the rise of social media, the demand for high-quality images among general users is steadily increasing. Consequently, the importance of improving the optical performance of smartphone cameras is becoming increasingly prominent.

[0003] In this regard, modern camera devices, including smartphones, contain complex optical systems composed of multiple lenses to acquire high-quality images. In such optical systems, reflections occurring on each surface of the lens system and on the surface of the image sensor have a negative impact on the final image quality. In particular, reflections occurring within the optical system cause problems such as reduced image contrast, flare (where bright light sources appear blurred), and ghosting (where false images appear). To address these issues, high-performance anti-reflective coatings are applied to both sides of each lens in general camera optical systems.

[0004] However, in some camera devices, especially smartphone cameras, an anti-reflective coating is often not applied to the outer surface of the protective glass used as the outermost optical element.

[0005] In particular, it has been confirmed that certain premium smartphones use high-hardness materials such as sapphire crystal as the outermost optical element to protect the camera, yet do not apply an anti-reflective coating to the surface, resulting in a high reflectivity of approximately 8.24%. This is significantly higher than the reflectivity of about 3.64% of a typical smartphone camera with an anti-reflective coating.

[0006] For example, Figure 1 shows the same subject captured by a camera (A) with an anti-reflective coating and a camera (B) without the coating, and it can be seen that there is a significant difference between the results.

[0007] Meanwhile, although there is a conventional technology for attaching a separate optical component to protect the camera device, this merely sought to protect the camera device from external impacts, thereby causing another problem of further degrading the optical performance of the camera device due to reflections generated from the surface of the added optical component.

[0008] To improve this, a technique of applying an anti-reflective coating to additional optical components was proposed; however, this had limitations in that it merely reduced reflections from the additional optical components and did not improve the optical performance of the camera device itself.

[0009] Therefore, there is a need for a new technical solution that can effectively reduce reflections occurring at the outermost optical elements of a camera device to improve optical performance, while simultaneously providing a protective function for the camera device. Prior art literature

[0010] Korean Patent Publication No. 10-2018-0045157 The problem to be solved

[0011] The present invention is devised to solve the problems of the aforementioned prior art, and aims to improve optical performance by effectively reducing reflections occurring at the outermost optical element of a camera device, while also providing a protective function for the camera device.

[0012] The problems of the present invention are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0013] An anti-reflection optical unit for a camera device according to the present invention for achieving the above-mentioned purpose may include an anti-reflection module comprising: a substrate having transparency in the visible light region, provided on the outermost optical element of a camera device to which an anti-reflection coating is not applied; a substrate having transparency in the visible light region and having a refractive index corresponding to the refractive index of the outermost optical element, provided on the outermost optical element of a camera device to which an anti-reflection coating is not applied; a substrate adhesive portion having transparency in the visible light region and provided between the substrate and the outermost optical element to mutually bond the outermost optical element and the substrate; and a first anti-reflection coating layer formed on the upper surface of the substrate to reduce light reflectance occurring at the interface between the substrate and an external air layer and to improve the total transmittance of the camera device.

[0014] In addition, the above material may be any one of PET film, TAC film, glass, or sapphire crystal.

[0015] At this time, the light-reflecting anti-optical module may further include a second anti-reflective coating layer formed on the lower surface of the substrate to reduce the light reflectance occurring at the interface between the substrate and the substrate adhesive portion, thereby improving the total transmittance of the camera device.

[0016] In addition, the present invention may further include a protective frame that is coupled to a support structure already established on the outer side of the camera device and is formed to surround the substrate by being formed at a height higher than the substrate.

[0017] Meanwhile, the above protective frame may be coupled to the above support structure and may include a protective portion extended outwardly beyond the support structure and an auxiliary cover portion extending downward from the outwardly extended area of ​​the protective portion to surround the outside of the support structure.

[0018] In addition, the present invention may further include a connecting part connecting the above-mentioned substrate and the above-mentioned protective frame.

[0019] In addition, the present invention may further include a structural protection module installed spaced apart from the upper portion of the light-reflecting anti-optical module.

[0020] In addition, the above structural protection module is installed spaced apart from the upper part of the light-reflecting anti-optical module and may include a protection member that is provided in an opening where interference by the angle of view of the camera device does not occur and has transparency in the visible light region.

[0021] At this time, the structural protection module may further include at least one of a third anti-reflection coating layer laminated on the upper surface of the protection member to reduce the light reflectivity of the protection member and a fourth anti-reflection coating layer laminated on the lower surface of the protection member to reduce the light reflectivity of the protection member.

[0022] In addition, the above-described structural protection module may further include an oleophobic coating layer laminated on the upper surface of the third anti-reflective coating layer to ensure antifouling properties. Effects of the invention

[0023] The anti-reflection optical unit for a camera device according to the present invention, for solving the above-mentioned problem, has the advantage of effectively reducing reflections occurring at the outermost optical element of the camera device by providing a substrate with an anti-reflection coating applied on the outermost optical element of the camera device, thereby preventing optical performance degradation such as flare or ghosting and improving the total transmittance of the camera device.

[0024] In addition, the present invention has the advantage of being able to stably attach the substrate to the outermost optical element while preventing degradation of optical performance by providing a substrate adhesive portion that is transparent in the visible light region between the substrate and the outermost optical element.

[0025] In addition, by configuring the refractive indices of the substrate and the substrate adhesive portion to correspond to the refractive index of the outermost optical element, additional reflections that may occur at the interfaces between the substrate and the substrate adhesive portion, and between the substrate adhesive portion and the outermost optical element, can be minimized, thereby further improving optical performance.

[0026] In addition, the present invention has the advantage of protecting the substrate from the external environment by providing a protective frame to surround the substrate, thereby preventing damage to the substrate and maintaining optical performance for a long period of time.

[0027] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims. Brief explanation of the drawing

[0028] Figure 1 shows the results of photographing the same subject using a camera with an anti-reflective coating and a camera without the coating. FIG. 2 is a diagram showing the structure of an anti-reflection optical unit for a camera device according to the first embodiment of the present invention. FIG. 3 is a diagram showing the structure of an anti-reflection optical unit for a camera device according to a second embodiment of the present invention. FIG. 4 is a diagram showing the structure of an anti-reflection optical unit for a camera device according to the third embodiment of the present invention. FIG. 5 is a photograph showing the anti-reflection optical unit for a camera device according to the third embodiment of the present invention actually applied to a camera device of a smartphone. FIG. 6 is a photograph showing the actual implementation of a structural protection module among the anti-reflection optical units for a camera device according to the third embodiment of the present invention. Specific details for implementing the invention

[0029] In this specification, where a component (or region, layer, part, etc.) is described as being "on," "connected," or "combined" with another component, it means that it may be directly placed / connected / combined with the other component, or that a third component may be placed between them.

[0030] Identical reference numerals denote identical components. Additionally, in the drawings, the thicknesses, proportions, and dimensions of the components are exaggerated for the effective illustration of the technical content.

[0031] "And / or" includes all one or more combinations that the associated configurations can define.

[0032] Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0033] Additionally, terms such as "below," "lower side," "above," and "upper side" are used to describe the relationships between the components depicted in the drawings. These terms are relative concepts and are described based on the directions indicated in the drawings.

[0034] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Additionally, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and are explicitly defined herein unless interpreted in an ideal or overly formal sense.

[0035] Terms such as "include" or "have" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0036] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0037] FIG. 2 is a diagram showing the structure of an anti-reflection optical unit for a camera device according to the first embodiment of the present invention.

[0038] At this time, the camera device may include a plurality of optical elements for forming an image of a subject, and the outermost optical element (10) may refer to the optical element located at the outermost position that is in direct contact with the external environment among these optical elements.

[0039] The outermost optical element (10) can be implemented, for example, as protective glass or cover glass that protects the optical system of a camera device, and especially in mobile devices such as smartphones, it can be implemented as a material having high hardness such as sapphire crystal.

[0040] In the case of this embodiment, the camera device is exemplified as a camera embedded in a smartphone, but it goes without saying that the camera device to which the present invention can be applied is not limited to this.

[0041] As illustrated in FIG. 2, in this embodiment, the anti-reflection optical unit for a camera device may include an anti-reflection module (100).

[0042] Such a light reflection prevention module (100) is configured to reduce reflection occurring on the surface of the outermost optical element (10), and in detail may include a substrate (110), a substrate adhesive part (120), and a first reflection prevention coating layer (130).

[0043] The substrate (110) may be formed from an optical material that is transparent in the visible light region. In this case, the visible light region may refer to an electromagnetic wave region with a wavelength between 380 nm and 780 nm, and transparency in the visible light region may be defined as a characteristic having a light absorption rate and haze value less than a preset reference value.

[0044] Here, the haze value is an optical property indicating the degree to which transmitted light is scattered; a low haze value may mean that the transmitted light maintains its original direction of propagation and does not degrade image sharpness.

[0045] Additionally, transparency in the visible light region may mean having a light transmittance greater than a preset reference value in the corresponding wavelength region. For example, in this embodiment, the light transmittance of the substrate (110) may be 90% or more.

[0046] In addition, in this embodiment, the substrate (110) may be composed of any one of a PET (Polyethylene Terephthalate) film, a TAC (Triacetyl Cellulose) film, glass, or sapphire crystal. A PET film may have a refractive index of about 1.51 to 1.57, and a TAC film may have a refractive index of about 1.49. Glass may have various refractive indices depending on its composition, but generally, it may have a refractive index between 1.45 and 1.65. Sapphire crystal may have a refractive index of about 1.77. However, the material of the substrate (110) is not limited thereto, and an optimal optical material may be selected according to transparency in the visible light region, refractive index, and required physical properties.

[0047] The substrate adhesive portion (120) has transparency in the visible light region and is provided between the substrate (110) and the outermost optical element (10) to bond the outermost optical element (10) and the substrate (110) to each other.

[0048] In this embodiment, the substrate adhesive portion (120) may be composed of a single layer or a multilayer structure. At this time, as described above, transparency in the visible light region refers to a characteristic having a visible light absorption rate and haze value below a preset reference value, and may be configured to have a transmission characteristic at a level where the color and shape of an object within the field of view of the camera device in the visible light region are identified without distortion.

[0049] The optical properties of the substrate (110) and the substrate adhesive portion (120) can be adjusted according to the material properties of the outermost optical element (10), and in particular, the refractive index can be set to a range in which ghosting due to Fresnel reflection does not occur at the interface between the outermost optical element (10) and the substrate (110).

[0050] In addition, since the adhesive portion (120) is additionally attached to the camera device, it may be composed of a material that can be removed from the camera device without leaving any residue when necessary.

[0051] The first anti-reflection coating layer (130) can be formed on the upper surface of the substrate (110) by laminating it on the substrate (110) so as to reduce light reflection occurring at the interface between the substrate (110) and the external air layer to a level where flare or ghosting caused by an external light source is not visually perceived.

[0052] The first anti-reflection coating layer (130) may be composed of a single layer or a multilayer dielectric thin film, and the thickness and refractive index of each layer may be configured to exhibit anti-reflection performance such that the color and shape of the subject are identified without distortion within the field of view of the camera device.

[0053] Meanwhile, although not illustrated, the light reflection prevention module (100) in this embodiment may further include a second anti-reflection coating layer. The second anti-reflection coating layer may be formed on the lower surface of the substrate (110) to reduce light reflection occurring at the interface between the substrate (110) and the substrate adhesive part (120) to a level where flare or ghosting caused by an external light source is not visually perceived.

[0054] The composition of the second anti-reflection coating layer can be optimized so that, depending on the refractive index of the substrate adhesive portion (120) and the refractive index of the substrate (110), ghosting caused by Fresnel reflection at the interface does not occur.

[0055] In this embodiment, by reducing reflections occurring at the outermost optical element (10) of the camera device through the detailed configuration of such an anti-reflection module (100), flare or ghosting phenomena caused by external light sources can be reduced, thereby improving the level at which the color and shape of the subject within the field of view of the device can be identified without distortion, and the total transmittance of the camera device can be increased to help with light reception in low-light environments.

[0056] In addition, by configuring the refractive index of the substrate (110) and the refractive index of the outermost optical element (10) to be within a range where ghosting due to Fresnel reflection at the interface does not occur, additional reflection that may occur at the interface between the substrate (110) and the outermost optical element (10) can be prevented, thereby improving optical performance.

[0057] Hereinafter, various other embodiments of the present invention will be described in detail. In addition, regarding other embodiments, descriptions of redundant components appearing in the previously described embodiments will be minimized or omitted.

[0058] FIG. 3 is a diagram showing the structure of an anti-reflection optical unit for a camera device according to a second embodiment of the present invention.

[0059] As illustrated in FIG. 3, the anti-reflection optical unit for a camera device according to the present embodiment may further include a protective frame (200) and a connecting part (300) in addition to the light anti-reflection module (100).

[0060] At this time, since the light reflection prevention module (100) may have the same configuration as the first embodiment described above, a detailed description of each configuration of the light reflection prevention module (100) will be omitted.

[0061] The protective frame (200) is coupled to a support structure (20) already constructed on the outer side of the camera device and can be formed to a height higher than that of the substrate (110) to surround the substrate (110). By forming the protective frame (200) higher than the substrate (110) in this way, damage to the substrate (110) caused by contact with an external object can be prevented. Additionally, since the protective frame (200) is installed in the outer area of ​​the camera device, it can be formed within a range that does not obstruct the field of view of the camera device, thereby protecting the substrate (110).

[0062] In this embodiment, the protective frame (200) may include a protective part (210) and an auxiliary cover part (220).

[0063] The protective part (210) is coupled to the support structure (20) and may be formed extending outward beyond the support structure (20). The outward extension structure of the protective part (210) may form a buffer area that blocks external impact from being directly transmitted to the camera device.

[0064] Additionally, the protective part (210) may be formed with a flat upper surface or inclined downward toward the outside to prevent external objects from sliding into the direction of the camera device.

[0065] In addition, when the field of view of the camera device is wide, the upper surface of the protective part (210) can be formed to slope downward inward so as to maintain the protective effect without interfering with the field of view.

[0066] The auxiliary cover portion (220) may be formed to extend downward by a predetermined length from the outer extension area of ​​the protection portion (210) to wrap around the outer side of the support structure (20). Such an auxiliary cover portion (220) prevents the protection frame (200) from detaching from the support structure (20) and can improve durability against external impact by reinforcing the bonding strength between the support structure (20) and the protection frame (200).

[0067] In addition, in this embodiment, the anti-reflection optical unit for the camera device may further include a connecting portion (300). The connecting portion (300) connects the substrate (110) and the protective frame (200) and may be formed of a material having a certain degree of elasticity.

[0068] Such a connecting part (300) can prevent the substrate (110) from being separated from the outermost optical element (10) when an external impact is applied, while also absorbing the impact to prevent the substrate (110) from being damaged.

[0069] Additionally, the connecting part (300) can absorb the gap between the substrate (110) and the protective frame (200) to help the substrate (110) be stably attached to the outermost optical element (10).

[0070] In addition, the connecting part (300) can also perform the role of relieving stress caused by the difference in thermal expansion coefficients that may occur between the substrate (110) and the protective frame (200).

[0071] Additionally, the connecting part (300) can correct positional errors that may occur when the protective frame (200) is installed on the support structure (20) of the camera device, thereby assisting in the accurate alignment of the material (110) with the outermost optical element (10).

[0072] As described above, in this embodiment, the combination of the protective frame (200) and the connecting part (300) can prevent the substrate (110) from detaching from the outermost optical element (10) even if the adhesive strength of the substrate adhesive part (120) is low. Through this, a stable attachment state of the substrate (110) can be maintained while using a substrate adhesive part (120) with low adhesive strength that can be removed without residue.

[0073] FIG. 4 is a diagram showing the structure of an anti-reflection optical unit for a camera device according to the third embodiment of the present invention.

[0074] As illustrated in FIG. 4, the anti-reflection optical unit for a camera device according to the present embodiment may additionally include a structural protection module (400) in addition to the light anti-reflection module (100), a protective frame (200), and a connecting part (300).

[0075] At this time, since the light reflection prevention module (100), the connection part (300), and the protection part (210) and auxiliary cover part (220) of the protection frame (200) may have the same configuration as the second embodiment described above, a detailed description of each component will be omitted.

[0076] The structural protection module (400) may be installed spaced apart from the upper portion of the light reflection prevention module (100). In this embodiment, the structural protection module (400) may specifically include a protective member (410), a third anti-reflection coating layer (420), and a fourth anti-reflection coating layer (430).

[0077] The protective member (410) is installed spaced apart from the upper part of the light reflection prevention module (100) and can be formed with an area larger than the angle of view in the opening so as not to cause interference due to the angle of view of the camera device.

[0078] Additionally, the protective member (410) can be configured to have a transmission characteristic such that the color and shape of the subject are identified without distortion in the visible light region so as not to cause interference due to the angle of view of the camera device.

[0079] For example, the protective member (410) may be made of a material that has resistance to scratches or impacts, such as chemically strengthened glass or sapphire glass. That is, the protective member (410) can serve as a primary protective barrier to prevent direct external impact from being applied to the light-reflecting anti-module (100) and the camera device.

[0080] The third anti-reflection coating layer (420) is laminated on the upper surface of the protective member (410) and can reduce light reflection occurring at the interface between the protective member (410) and the external air layer to a level where flare or ghosting caused by an external light source is not visually perceived.

[0081] In addition, the fourth anti-reflection coating layer (430) is laminated on the lower surface of the protective member (410) to reduce light reflection occurring at the interface between the protective member (410) and the internal air layer.

[0082] Meanwhile, although not illustrated, the present embodiment may further include an oleophobic coating layer. The oleophobic coating layer is laminated on the upper surface of the third anti-reflection coating layer (420) to ensure antifouling properties.

[0083] Such an oleophobic coating layer can prevent foreign substances entering from the outside from adhering to the surface of the protective member (410), thereby preventing a decrease in optical performance. Additionally, the oleophobic coating layer can assist in easily removing contaminants such as fingerprints or oil that may occur on the surface of the protective member (410).

[0084] Meanwhile, in this embodiment, the structural protection module (400) may be supported by a protective frame (200). To this end, in this embodiment, the protective frame (200) may further include a fixing part (230) for supporting the structural protection module (400) in a spaced-apart state above it.

[0085] The fixed part (230) can be extended vertically from the upper part of the protective frame (200) to support the structural protection module (400), and the height of the fixed part (230) can be set considering the angle of view of the camera device and the minimum separation distance at which optical interference (Newton's ring) does not occur.

[0086] FIG. 5 is a photograph showing the anti-reflection optical unit for a camera device according to the third embodiment of the present invention actually applied to a camera device of a smartphone.

[0087] Referring to FIG. 5, it can be seen that in the dual lens structure of the camera device, the light-reflecting anti-module (100) is attached only to the upper semicircular area of ​​the left lens.

[0088] It can be visually confirmed that the surface reflectivity of the area where the light reflection prevention module (100) is applied is significantly reduced compared to the area where it is not applied, and this demonstrates that the light reflection prevention module (100) of the present invention can effectively reduce light reflection occurring at the outermost optical element (10) of the camera device.

[0089] FIG. 6 is a photograph showing the actual implementation of a structural protection module (400) among the anti-reflection optical units for a camera device according to the third embodiment of the present invention.

[0090] Referring to FIG. 6, it can be seen that the structural protection module (400) is centered around a circular transparent protective member (410), and a white support structure (20) is formed on the outer edge thereof.

[0091] As described above, the protective member (410) is formed with a sufficient size considering the field of view of the camera device, and it can be seen that high transparency is maintained by applying an anti-reflective coating to both sides. In addition, a black adhesive for bonding with the camera device is observed on the lower part of the protective member (410), which allows the structural protection module (400) to be stably fixed to the camera device.

[0092] As described in each embodiment above, the present invention can effectively reduce reflections occurring at the outermost optical element (10) of the camera device by providing a light reflection prevention module (100) on the outermost optical element (10) of the camera device and optionally providing a structural protection module (400), thereby preventing optical performance degradation such as flare or ghosting and improving the total transmittance of the camera device.

[0093] Further embodiments of the present invention will be described below.

[0094] In the fourth embodiment of the present invention, a configuration for compensating for the difference in thermal expansion between the substrate (110) and the protective frame (200) due to temperature change may be added. And to this end, in this embodiment, the connecting part (300) may include a temperature compensation structure.

[0095] Specifically, in this embodiment, the connecting portion (300) may be connected to the protective frame (200) at a plurality of points along the outer circumference of the substrate (110), and each connecting point may be provided with a thermal expansion compensation portion that expands and contracts according to temperature changes.

[0096] Such a thermal expansion compensation part may have a bimetallic structure, and the bimetallic structure may be formed as a stacked structure of two types of metal thin films having different coefficients of thermal expansion.

[0097] When the temperature rises, the substrate (110) and the protective frame (200) expand according to their respective coefficients of thermal expansion. At this time, the thermal expansion compensation part can induce the connecting part (300) to contract inward as the metal film with the larger coefficient of thermal expansion bends outward. Conversely, when the temperature falls, the thermal expansion compensation part can induce the connecting part (300) to expand outward as it bends in the opposite direction.

[0098] Through such a configuration, the present embodiment can compensate for relative dimensional changes between the substrate (110) and the protective frame (200) due to external temperature changes. Therefore, thermal stress applied to the substrate (110) can be dispersed, thereby preventing the substrate (110) from separating from or being damaged by the outermost optical element (10).

[0099] In addition, the alignment state between the substrate (110) and the outermost optical element (10) can be stably maintained even with temperature changes, thereby preventing the optical performance from deteriorating.

[0100] Next, the fifth embodiment of the present invention may include a configuration that allows for selective control of adhesive strength through UV curing.

[0101] To this end, in this embodiment, the substrate adhesive portion (120) may include a UV-curing adhesive. The UV-curing adhesive may be composed of a material whose molecular structure changes and adhesive properties change when exposed to ultraviolet (UV) light of a specific wavelength.

[0102] The substrate adhesive portion (120) maintains a level of transparency that allows the color and shape of the subject to be identified without distortion within the field of view of the camera device before UV curing, while increasing the adhesive strength after UV curing so that the substrate (110) can be firmly fixed to the outermost optical element (10).

[0103] And the UV-curing adhesive of the substrate adhesive part (120) can be configured such that the adhesive strength increases when exposed to UV in the first wavelength range and decreases when exposed to UV in the second wavelength range.

[0104] For example, the first wavelength region may be a wavelength region of UV-B light of 280 nm to 315 nm, and the second wavelength region may be a wavelength region of UV-A light of 315 nm to 400 nm.

[0105] Through this, the adhesive force can be selectively controlled when attaching and removing the anti-reflective optical unit for the camera device. For example, when attaching, UV light in the first wavelength range is irradiated to increase the adhesive force, and when removing, UV light in the second wavelength range is irradiated to decrease the adhesive force, thereby allowing the outermost optical element (10) to be removed without leaving any residue.

[0106] Next, in the sixth embodiment of the present invention, a ventilation structure may be added to the space between the substrate and the outermost optical element.

[0107] Specifically, in this embodiment, the protective frame (200) may include a ventilation hole that communicates the space between the substrate (110) and the outermost optical element (10) with external air.

[0108] A ventilation hole is formed on the side of the protective frame (200) to prevent the space between the substrate (110) and the outermost optical element (10) from being sealed. At this time, the ventilation hole may be formed in the shape of a fine hole to allow air circulation while blocking the entry of foreign substances from the outside.

[0109] Through such ventilation holes, the present embodiment can maintain internal pressure changes that may occur in the space between the substrate (110) and the outermost optical element (10) in equilibrium with the outside. In addition, it can prevent the substrate (110) from lifting or deforming from the outermost optical element (10) due to temperature changes or atmospheric pressure changes.

[0110] The ventilation hole can also serve to prevent condensation that may occur in the space between the substrate (110) and the outermost optical element (10). That is, by maintaining the humidity of the internal space at the same level as the outside through natural circulation with the outside air, the ventilation hole can prevent the optical performance from deteriorating due to condensation caused by temperature changes.

[0111] Preferred embodiments according to the present invention have been described above, and it is obvious to those skilled in the art that, in addition to the embodiments described above, the present invention may be embodied in other specific forms without departing from the spirit or scope thereof. Therefore, the embodiments described above should be regarded as illustrative rather than restrictive, and accordingly, the present invention is not limited to the description above but may be modified within the scope of the appended claims and their equivalents. Explanation of the symbols

[0112] 10: Outermost optical element 20: Support structure 100: Anti-reflection module 110: Entry 120: Substrate adhesion part 130: First anti-reflective coating layer 200: Protective Frame 210: Protection Department 220: Auxiliary cover section 230: Fixed part 300: Connection 400: Structural protection module 410: Protection absence 420: Third anti-reflective coating layer 430: 4th anti-reflective coating layer

Claims

Claim 1 An anti-reflection optical unit for a camera device comprising: a substrate having transparency in the visible light region, provided on the outermost optical element of a camera device to which an anti-reflection coating is not applied; a substrate adhesive portion having transparency in the visible light region and provided between the substrate and the outermost optical element to mutually bond the outermost optical element and the substrate; and a first anti-reflection coating layer formed on the upper surface of the substrate, laminated on the substrate to reduce light reflectance occurring at the interface between the substrate and an external air layer to improve the total transmittance of the camera device, wherein the substrate and the substrate adhesive portion have a refractive index corresponding to a range in which ghosting due to Fresnel reflection does not occur at the interface between the outermost optical element and the substrate. Claim 2 An anti-reflective optical unit for a camera device, characterized in that, in claim 1, the above-mentioned material is one of PET film, TAC film, glass, or sapphire crystal. Claim 3 An anti-reflection optical unit for a camera device according to claim 1, wherein the anti-reflection optical module further comprises a second anti-reflection coating layer formed on the lower surface of the substrate to reduce the light reflectance occurring at the interface between the substrate and the substrate adhesive portion, thereby improving the total transmittance of the camera device. Claim 4 An anti-reflection optical unit for a camera device according to claim 1, further comprising a protective frame that is coupled to a support structure already established on the outer side of the camera device and is formed to surround the substrate by being formed at a height higher than the substrate. Claim 5 An anti-reflective optical unit for a camera device according to claim 4, wherein the protective frame comprises: a protective portion that is coupled to the support structure and extends outwardly beyond the support structure; and an auxiliary cover portion that extends downward from the outwardly extended area of ​​the protective portion and surrounds the outer side of the support structure. Claim 6 An anti-reflection optical unit for a camera device, further comprising a connecting portion connecting the above-mentioned material and the above-mentioned protective frame in paragraph 4. Claim 7 An anti-reflection optical unit for a camera device, wherein, in claim 1, a structural protection module installed spaced apart from the upper portion of the anti-reflection optical module. Claim 8 In claim 7, the above-mentioned structural protection module is installed spaced apart from the upper portion of the above-mentioned light-reflecting anti-optical module and includes a protective member provided in an opening where interference by the angle of view of the camera device does not occur, and which has transparency in the visible light region, for an anti-reflective optical unit for a camera device. Claim 9 In claim 8, the anti-reflection optical unit for a camera device further comprises at least one of: a third anti-reflection coating layer laminated on the upper surface of the protective member to reduce the light reflectance of the protective member; and a fourth anti-reflection coating layer laminated on the lower surface of the protective member to reduce the light reflectance of the protective member. Claim 10 In claim 9, the above-described structural protection module further comprises an oleophobic coating layer laminated on the upper surface of the third anti-reflection coating layer to ensure antifouling properties, an anti-reflection optical unit for a camera device.

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