Method of manufacturing an optical device

Abstract

A manufacturing method of an optical device, characterized by comprising: a step of preparing a first optical element and a second optical element formed with a plurality of pairs of corresponding faces; a step of forming a plurality of reflecting portions on each of the first faces of the first optical element; and a step of closely and fixedly joining the first optical element and the second optical element to form the optical device, the pairs of corresponding faces of the first optical element and the second optical element being formed so as to closely adhere to each other when abutting against each other, each of the pairs of corresponding faces being formed in a sawtooth shape so as to engage with each other, each of the plurality of reflecting portions being formed of a metal material smaller than 8 mm, and in the step of forming the plurality of reflecting portions, the plurality of reflecting portions of the metal material are formed by mask vapor deposition on each of the first faces of the first optical element formed in the sawtooth shape so as to be formed at intervals from each other along the first faces and apart from peak portions and valley portions of the first faces formed in the sawtooth shape, respectively, to form the plurality of reflecting portions arranged in an array shape.

Description

[0001] This invention is a divisional application of application No. 201880074941.6 (international application No. PCT / KR2018 / 014934), entitled "Method for Manufacturing an Optical Device", filed on November 29, 2018. Technical Field

[0002] The present invention relates to a method for manufacturing an optical device, and more specifically, to a method for efficiently manufacturing an optical device in which a small reflective portion is disposed inside an optical element. Background Technology

[0003] Augmented Reality (AR) is a technology that overlays virtual images (virtual worlds) onto the real world as seen by the user's naked eye. Because it presents a single image by combining a virtual world with additional information in the real world in real time, it was initially also called Mixed Reality.

[0004] Research into augmented reality began with the development of see-through head-mounted displays (HMDs), but it has a different meaning from virtual reality (VR). Because VR immerses users in a virtual environment, they cannot see the actual environment. Conversely, in augmented reality, users can see the actual environment, which is presented as a blend of the real environment and virtual objects. In other words, the difference is that VR replaces the real world to present to the user, while augmented reality supplements the real world by overlaying virtual objects onto it.

[0005] To achieve this augmented reality, HMDs are mainly used. The lens modules (optical system modules) of such HMDs are often difficult to manufacture due to their complex structure. The complex structure inevitably leads to the lens modules being large and heavy.

[0006] To overcome the problems of existing augmented reality devices, the applicant has proposed an augmented reality device as disclosed in Korean Patent No. 10-1660519. This augmented reality device utilizes a small reflective element to deepen the depth of field and produce a pinhole effect, thereby consistently providing a clear virtual image regardless of the user's distance adjustment. Thus, compared to the prior art, it can provide an improved augmented reality service.

[0007] However, in reality, the manufacture of such small reflective parts has not yet been standardized, and mass production is difficult.

[0008] As an optical device utilizing a small reflective part, the following are examples of methods that can be conceived using existing technology.

[0009] Firstly, one method involves preparing a large reflector, leaving only the smaller reflective portion needed, and then spraying the remaining area to create a mask. In this method, the mask acts as a slit, thus causing diffraction and making it difficult to clearly distinguish the boundary areas. Furthermore, the reflective portion is prone to contamination during the engineering process.

[0010] As a second approach, one could consider preparing a large reflector and leaving only the smaller reflective portion needed, then cutting off the remaining area. However, this method has the potential for unforeseen curvature or wear issues, which could make precision cutting difficult and cause the reflective portion to become easily contaminated.

[0011] Existing technical documents

[0012] Korean Patent Registration No. 10-1660519 (September 29, 2016) Summary of the Invention

[0013] Technical issues

[0014] The present invention aims to solve the problems described above, and aims to provide a method for manufacturing an optical device capable of arranging a small reflective portion inside an optical element.

[0015] Technical solution

[0016] To address the aforementioned issues, the present invention provides a method for manufacturing an optical device, comprising: preparing a first optical element and a second optical element having a pair of corresponding surfaces; forming a reflective portion on the surface of the first optical element in the pair of corresponding surfaces; and forming an optical device by closely attaching and fixing the first optical element and the second optical element.

[0017] The first optical element and the second optical element are preferably made of the same material with the same refractive index.

[0018] Furthermore, the corresponding surfaces of the first optical element and the second optical element are preferably formed in a way that they are in close contact when they come into contact with each other.

[0019] Furthermore, the pair of corresponding surfaces can be formed in a manner that is inclined relative to the thickness direction of the first optical element and the second optical element.

[0020] Furthermore, the thickness direction is preferably the direction from the pupil toward the optical device when the user is wearing the augmented reality realization device including the optical device.

[0021] Furthermore, the step of forming an optical device by closely attaching and fixing the first optical element and the second optical element is preferably to use an adhesive of a material having the same refractive index as the first optical element and the second optical element to bond the first optical element and the second optical element.

[0022] Furthermore, the step of bonding and fixing the first optical element and the second optical element to form an optical device can be used to cure the first optical element and the second optical element bonded by the adhesive to form an optical device.

[0023] Furthermore, the corresponding surfaces of the first optical element and the second optical element and the reflective portion can be formed as curved surfaces.

[0024] According to another aspect of the present invention, a method for manufacturing an optical device is provided, comprising: a step of preparing an optical element having an inclined surface; a step of forming a reflective portion on the inclined surface of the optical element; a step of depositing the optical element having the reflective portion in a resin having the same refractive index as the optical element; and a step of curing the resin deposited in the optical element and the reflective portion.

[0025] Furthermore, the inclined surface is preferably formed in a manner that is inclined relative to the thickness direction of the optical element.

[0026] Furthermore, the thickness direction is preferably the direction from the pupil toward the optical device when the user is wearing the augmented reality realization device including the optical device.

[0027] Furthermore, the resin is preferably made of the same material as the optical element.

[0028] Furthermore, the inclined surface and reflective portion of the optical element can be formed as curved surfaces.

[0029] According to another aspect of the present invention, a method for manufacturing an optical device is provided, comprising: preparing a first optical element and a second optical element having a plurality of pairs of corresponding surfaces; forming a reflective portion on the surface of each of the pairs of corresponding surfaces of the first optical element; and forming an optical device by attaching and fixing the first optical element and the second optical element together.

[0030] The effects of the invention

[0031] According to the present invention, the object is to provide a method for manufacturing an optical device in which a small reflective portion is disposed inside an optical element.

[0032] Furthermore, according to the present invention, since an optical device capable of arranging a small reflective portion inside an optical element can be provided, it can function as a complete see-through lens, thereby providing an optical system particularly suitable for augmented reality realization devices.

[0033] In particular, the advantage of the optical device manufactured according to the present invention is that, since the ghosting caused by residual reflection or residual refraction at the joint surface of the optical element can be minimized, the effect of increasing the depth of the reflective part and the pinhole effect can be maintained.

[0034] Furthermore, according to the present invention, the advantages are that since a slit is not used to form a reflective portion within the optical element, no diffraction phenomenon occurs, and since the reflective surface is located inside the optical element, the physical and chemical durability is high and the performance can be maintained for a long time. It also has the advantage of being easy to adjust various curvatures, shapes, sizes, and forms.

[0035] Furthermore, according to the present invention, a method for manufacturing an optical device suitable for mass production and capable of reducing manufacturing costs can be provided. Attached Figure Description

[0036] Figure 1 This is a schematic diagram illustrating the structure of the augmented reality realization device 100 to which the optical device 10 of the present invention is applied.

[0037] Figure 2 This is a diagram illustrating the manufacturing method of the optical device 10 according to the first embodiment of the present invention.

[0038] Figure 3 This is a diagram illustrating a method for manufacturing an optical device 10 according to a second embodiment of the present invention.

[0039] Figure 4 These are photographs comparing an optical device with a reflective portion manufactured by existing methods with an optical device 10 manufactured according to the present invention.

[0040] Figure 5 It is a photograph showing a virtual image and a physical object as seen through an optical device 10 manufactured according to an embodiment of the present invention.

[0041] Figure 6 This is a diagram used to illustrate another embodiment of the present invention.

[0042] Figure 7 This is a diagram used to illustrate another embodiment of the present invention.

[0043] Figure 8 This is a diagram illustrating yet another embodiment of the present invention.

[0044] Figures 9 to 12It is used to explain the basis Figure 8 The diagram shown illustrates the process of forming the optical device 10 in the embodiment. Detailed Implementation

[0045] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can readily implement the present invention.

[0046] First, an augmented reality realization device 100 to which the optical device 10 of the present invention is applied will be described. Such an augmented reality realization device 100 is based on the contents described in Korean Patent Registration No. 10-1660519 filed by the applicant.

[0047] Figure 1 This is a schematic diagram illustrating the structure of the augmented reality realization device 100 to which the optical device 10 of the present invention is applied.

[0048] Reference Figure 1 The augmented reality device 100 includes an optical device 10 consisting of a reflective part 11 and an optical element 12, an image output part 20 that outputs image light corresponding to an augmented reality image, and a frame part 30 that supports the optical device 10.

[0049] The reflector 11 performs the function of reflecting the image light corresponding to the augmented reality image output from the image output unit 20 and transmitting it to the pupil 50, and the reflector 11 is disposed on the inner surface of the optical element 12.

[0050] In addition, the augmented reality realization device 100 may also include an image capture module 40 for capturing images.

[0051] The image output unit 20 is a mechanism that outputs image light corresponding to the augmented reality image to the reflection unit 11, and can be a display device such as a small LCD.

[0052] The display device, as a mechanism for displaying augmented reality images on a screen, displays augmented reality images by emitting light in a manner that allows the augmented reality images to be reflected by the reflective unit 11 and transmitted to the user's pupil, and image light corresponding to the displayed augmented reality image is output and transmitted to the reflective unit 11.

[0053] As a component for outputting augmented reality images, a display device can output a variety of images, such as still images or moving images, and there are no particular restrictions on the size, type, or shape of the display device.

[0054] The display device can output images received from external electronic devices (such as smartphones) via wireless communication functions such as Bluetooth or wireless networks, or it can receive images captured by the imaging module 40 via wired or wireless communication functions and output them.

[0055] The wired or wireless communication connection between the imaging module 40 and the display device can be achieved in various ways (e.g., a communication line that runs through the frame portion 30). Since this method is obvious to those skilled in the art, its detailed description is omitted.

[0056] On the other hand, the image output unit 20 may be a reflection mechanism or a refraction mechanism disposed between the display device and the reflection unit 11 as described above, which reflects or refracts the image light output from the display device and transmits it to the reflection unit 11. In this case, the image light output from the display device is transmitted to the reflection unit 11 through the reflection mechanism or the refraction mechanism instead of being directly output to the reflection unit 11.

[0057] Furthermore, the image output unit 20 may be a collimator that outputs image light from the display device as collimated parallel light. Alternatively, such a collimator may be configured on the reflection mechanism or refraction mechanism and the display device.

[0058] That is, the image output unit 20 refers to a display device that displays an image for augmented reality or a reflection or refraction mechanism that ultimately transmits the image light output from the display device to the reflection unit 11, etc.

[0059] The so-called augmented reality image, as the image displayed on the display device, refers to a virtual image provided to the user's pupil via the reflector 11, and can be a static image or a dynamic image. Such an augmented reality image can be output as corresponding image light and provided to the user's pupil via the reflector 11 as a virtual image. At the same time, the user receives images of the real world that they can directly recognize with their naked eye, thereby receiving augmented reality services.

[0060] On the other hand, Figure 1 In this configuration, the image output unit 20 is positioned at the top with reference to the user's gaze at the front, but it is not limited to this and can also be positioned on the side or diagonally in the vertical direction. For example, when the augmented reality device is implemented in the form of glasses, the image output unit 20 can be positioned at an appropriate position on the frame of the glasses.

[0061] On the other hand, a display device may simply display an image by receiving an image signal from an external separate image playback device, or it may be integrated with a device that stores and plays images, and have its own processor, memory, etc.

[0062] Since the display device itself is not the direct objective of this invention and existing devices capable of displaying images on a screen can be used, its detailed description is omitted.

[0063] The reflector 11 can reflect the image light corresponding to the augmented reality image output from the image output unit 20 and transmit it to the user's pupil 50.

[0064] That is, the reflector 11 reflects the image light corresponding to the augmented reality image output from the image output unit 20 into the pupil 50 of the user's eye, thereby performing the function of providing the augmented reality image to the user.

[0065] The reflector 11 provides augmented reality services by reflecting image light corresponding to the augmented reality image output from the image output unit 20 towards the pupil 50, thereby superimposing the augmented reality image with a real-world image. In other words, the reflector 11 provides the user with an augmented reality image displayed on the display device by reflecting image light output from the image output unit 20 towards the user's pupil 50.

[0066] Therefore, the reflector 11 is configured to have an appropriate angle between the image output unit 20 and the pupil 50. Preferably, when the reflector 11 is located in front of the user's pupil 50, it is configured to have an angle that allows image light incident on the center of the reflector 11 to be reflected and incident on the center of the pupil 50.

[0067] For example, due to in Figure 1 Assuming that the reflector 110 is located in the front direction of the pupil 50 when the user is gazing directly at the image, and the image output unit 20 is located to the side in the front direction of the pupil, then in this case, as... Figure 1 As shown, the reflector 11 is tilted at an angle of about 45 degrees.

[0068] The reflective portion 11 is preferably smaller than the size of a human pupil. Generally, it is known that the average size (diameter) of a human pupil is in the range of 2 to 8 mm, therefore, the size of the reflective portion 11 in this invention is preferably less than 8 mm. The size of the reflective portion 11 is defined as the maximum length between any two points on the boundary line of the reflective portion 11.

[0069] Thus, when the reflective element 11 is formed to be smaller than the pupil size, the field of depth of light incident on the pupil through the reflective element 11 can be greatly increased. Here, the depth of field refers to the range perceived as focused. When the depth of field is increased, it means that the focal length of the augmented reality image is also increased; therefore, even if the user changes the focal length of the real world while gazing at it, the focus of the augmented reality image is always perceived as focused, regardless of this. This can be considered a pinhole effect.

[0070] That is, in this invention, the reflective part 11 is made smaller than the pupil, thereby allowing the user to recognize the image through the pinhole effect based on human visual recognition characteristics. Therefore, the user can see an image with a greater depth of field through the pinhole effect.

[0071] Figure 1 To aid in understanding the present invention, the image output section 20 and the reflective section 11 shown differ from the proportions according to their actual sizes.

[0072] The reflective part 11 can be shaped in various ways, such as circular, elliptical, or polygonal, and its diameter or minor axis length can be 0.3 to 6 mm. Preferably, when the diameter or minor axis length is 0.3 to 4 mm, the pinhole effect can be better achieved.

[0073] In an embodiment, the reflective portion 11 can be formed into a rectangular or elliptical shape with a major axis and a minor axis, but since... Figure 1 As shown, the reflective part 11 is tilted and arranged obliquely, so when viewed from the position of the user's pupil 50, it may also be perceived as a square or a circle.

[0074] Furthermore, the diameter or minor axis of the reflective portion 11 can be formed to be less than 2 mm. If the size of the reflective portion 11 is formed to be less than 2 mm, it can always be formed to be a through hole smaller than a human body.

[0075] Furthermore, the reflectivity of the reflective portion 11 is preferably configured to be close to 100%, and for this purpose, the reflective portion 11 can be formed of a metallic material. For example, the reflective portion 11 can be made of aluminum (Al) or silver (Ag), and various types of metals, alloys, or synthetic resins can also be used.

[0076] Furthermore, the reflective portion 11 can be formed as an optical element of various materials, for example, it can be formed as a holographic optical element to perform diffraction grating reflection. In this case, the image acquired by the user has a holographic shape. Alternatively, it can be configured to use other types of elements besides holographic optical elements to perform diffraction grating reflection.

[0077] Optical element 12 may be a lens that allows at least a portion of visible light to pass through, such as... Figure 1 As shown, it has a reflective part 11 inside.

[0078] Wherein, allowing at least a portion of visible light to pass through means that the transmittance of visible light is within the range of 0% to 100%. Such an optical element 12, for example... Figure 1 As shown, when the reflector 11 is positioned in front of the user's pupil 50, while recognizing the image of the real world through the pupil 50, the image light corresponding to the augmented reality image output from the image output unit 20 is reflected by the reflector 11 and output to the pupil 50, thereby providing an augmented reality service by superimposing the image of the real world and the augmented reality image. In other words, while fixing the reflector 11, the optical element 12 also performs the function of transmitting the image light from the output unit 20 to the pupil 50 through the reflector 11 while allowing the image of the real world to pass through and be transmitted to the user's pupil 50.

[0079] The optical element 12 can be implemented as a quadrilateral lens module, and such a lens module can be detachably attached to an augmented reality device in the form of eyeglasses. Furthermore, when the augmented reality device 100 is implemented as eyeglasses, it can also be implemented as eyeglass lenses.

[0080] The frame 30 is a mechanism for fixing and supporting the optical device 10 and the image output unit 20. In the case where the augmented reality realization device 100 is implemented in the form of glasses, the frame 30 can be an eyeglass frame.

[0081] Next, please refer to the following: Figure 2 For application in Figure 1 The manufacturing method of the optical device 10 of the present invention on the augmented reality realization device 100 described herein will be explained.

[0082] Figure 2 This is a diagram illustrating the manufacturing method of the optical device 10 according to the first embodiment of the present invention.

[0083] Reference Figure 2 First, as shown in (a), a first optical element 121 and a second optical element 122 with a pair of corresponding surfaces are prepared.

[0084] like Figure 1 As shown, the first optical element 121 and the second optical element 122 may be lenses that allow at least a portion of visible light to pass through, and these are formed of the same material having the same refractive index as each other.

[0085] The first optical element 121 and the second optical element 122 have a specified thickness and length, in Figure 2 The thickness direction is vertical in the figure, and the length direction is horizontal.

[0086] As shown in (d), the thickness direction of the optical element 121 and the second optical element 122 is applied to the augmented reality realization device 100 after the optical device 10 is manufactured. Thus, when the user wears the augmented reality realization device 100, the direction of looking from the pupil 50 toward the optical device 10 becomes, more precisely, the direction of looking toward the reflective part 11 disposed inside the optical device 10.

[0087] Wherein, if a pair of corresponding surfaces of the first optical element 121 and the second optical element 122 are referred to as the first surface 211 and the second surface 221 respectively, the pair of corresponding first surfaces 211 and second surfaces 221 are formed in a way that they are in close contact with each other and are inclined relative to the thickness direction.

[0088] The tilt angle towards this thickness direction and Figure 1 The angles of the reflective portions 11 shown are the same; that is, the tilt angle of a pair of corresponding first surfaces 211 and second surfaces 221 relative to the thickness direction when they abut each other is determined according to the angle required for the reflective portions 11 to reflect image light from the image output unit 20 to the pupil 50. Therefore, the required arrangement angle of the reflective portions 11 in the augmented reality realization device 100 is calculated in advance, and the tilt angles of the first surfaces 211 and second surfaces 221 in the thickness direction are set accordingly to prepare the first optical element 121 and the second optical element 122.

[0089] The configuration angle of the reflective part 11 in the augmented reality realization device 100 can be determined in various ways depending on the position of the image output part 20 and the position of the reflective part 11 relative to the pupil 50.

[0090] Next, as shown in (b), a reflective portion 11 is formed on the first surface 211 of the first optical element 121.

[0091] The reflective portion 11 can be formed from inorganic or organic materials such as metals and oxides, and a coating method suitable for each material can be used. For example, when the reflective portion 11 is formed from a metallic material such as aluminum, exposure evaporation or mask evaporation methods used in semiconductor processes can be used. Since such evaporation methods are known in the prior art, they are not the direct objective of this invention, and therefore detailed descriptions are omitted here.

[0092] Alternatively, the reflective part 11 can be pre-generated and then glued on using a sticker or similar adhesive.

[0093] When the reflective part 11 is formed on the first surface 211 of the first optical element 121, such as Figure 2 As shown in (c), the first optical element 121 and the second optical element 122 are closely attached and fixed.

[0094] The first optical element 121 and the second optical element can be bonded together by means of an adhesive 320 having the same refractive index as the first optical element 121 and the second optical element 122.

[0095] After such a process and the solidification is performed, Figure 2 During the curing process of the first optical element 121 and the second optical element 122 bonded together as shown in (d), an optical element 12 with the same refractive index for all parts except the reflective part 11 can be formed, and an optical device 10 can be manufactured by such an optical element 12 and the reflective part 11.

[0096] Figure 2 The embodiments have the following advantages.

[0097] 1) No residual reflection occurs on the joint surface between the reflective part 11 and the optical elements 121 and 122, thereby maintaining the pinhole effect.

[0098] 2) By not using slits, diffraction phenomena are reduced.

[0099] 3) Since the reflector 11 is located inside the optical elements 121 and 122, it has high physical and chemical durability.

[0100] 4) It is beneficial for precision machining (adjustment of curvature, shape, size and form).

[0101] 5) When multiple reflective parts 11 are implemented, it is advantageous to manufacture multiple small reflective parts 11.

[0102] Figure 3 This is a diagram illustrating a method for manufacturing an optical device 10 according to a second embodiment of the present invention.

[0103] Reference Figure 3 First, as shown in (a), an optical element 121 with an inclined surface 211 is prepared. This optical element 121 and... Figure 2 The first optical element 121 is the same.

[0104] like Figure 1 As shown, optical element 121 can be a lens that transmits at least a portion of visible light, and optical element 121 is also as... Figure 2 As shown in the embodiments, it has a specified thickness and length, in Figure 3 The thickness direction is vertical as shown in the figure, and the length direction is horizontal.

[0105] like Figure 2 As shown in the embodiment, the thickness direction of the optical element 121 is applied to the augmented reality realization device 100 after the optical device 10 is manufactured. Thus, when the user wears the augmented reality realization device 100, the direction of looking from the pupil 50 toward the optical device 10, or more specifically, toward the reflective portion 11 disposed inside the optical device 10, and the inclined surface 211 of the optical element 121 is inclined relative to the thickness direction.

[0106] The tilt angle towards this thickness direction is also related to Figure 1 The angles of the reflective portion 11 shown are the same. That is, the angle at which the inclined surface 211 is inclined relative to the thickness direction of the optical element 121 is determined according to the angle at which the reflective portion 11 needs to be configured so that image light from the image output portion 20 is reflected to the pupil 50. Therefore, the required configuration angle of the reflective portion 11 in the augmented reality realization device 100 is calculated in advance and the tilt angle of the inclined surface 211 in the thickness direction is set accordingly to prepare the optical element 121.

[0107] The configuration angle of the reflective part 11 in the augmented reality realization device 100 can be determined in various ways depending on the position of the image output part 20 and the position of the reflective part 11 relative to the pupil 50.

[0108] Next, as shown in (b), a reflective portion 11 is formed on the inclined surface of the optical element 121.

[0109] like Figure 2 In the embodiments described, the reflective portion 11 may be formed of a material such as metal, oxide, or organic matter, and may be formed on the inclined surface 211 by exposure evaporation or mask evaporation methods used in semiconductor processes.

[0110] Alternatively, the reflective part 11 can be pre-generated and glued on using a sticker or similar adhesive.

[0111] When the reflective part 11 is formed on the inclined surface, the optical element 121 is deposited in the resin 230 having the same refractive index as the optical element 121.

[0112] The resin 230 can be adapted to have the same refractive index as the optical element 121 to produce refraction or reflection at the interface so that light can pass through. For example, when the refractive index of the optical element 121 is 1.516, the resin 230 can also be adapted to be a material with a refractive index of 1.516 when cured.

[0113] Furthermore, since the optical element 121 and the resin 230 have the same coefficient of thermal expansion, it is preferable that the adhesive force can be maintained at various temperatures.

[0114] Furthermore, since the optical element 121 has good affinity with the resin 230, it is preferable to use a material that can maintain adhesion for a long time.

[0115] Considering the above points, the optical element 121 and the resin 230 are preferably made of the same material.

[0116] After such a process and the solidification is performed, Figure 3 During the process of depositing resin 230 with optical element 121 and reflective portion 11 as shown in (d), an optical element 12 with the same refractive index for all regions except reflective portion 11 can be formed, and an optical device 10 can be manufactured by such optical element 12 and reflective portion 11.

[0117] Figure 3 The embodiments are also similar to Figure 2 They have the same advantages.

[0118] Figure 4 These are photographs comparing an optical device with a reflective portion manufactured by existing methods with an optical device 10 manufactured according to the present invention.

[0119] The existing method is as follows: prepare a reflective part and coat the remaining area except for the reflective part to be used, thereby having a partially reflective surface.

[0120] As can be seen, when manufactured by existing methods, as shown in (a) and (b), blurry and low-resolution images are generated due to residual reflection and diffraction of the image. However, when manufactured by embodiments of the present invention, as shown in (c), the ghosting caused by the already minimized residual reflection or residual refraction can be reduced to a minimum and diffraction is almost eliminated, thus maintaining a clear resolution.

[0121] Figure 5 It is a photograph showing a virtual image and a physical object as seen through an optical device 10 manufactured according to an embodiment of the present invention.

[0122] exist Figure 5 In the image, the jar on the left is a virtual image presented by the optical device 10 of the present invention, while the jar on the right is an image of the physical object. When comparing the virtual image and the physical object, it can be seen that the virtual image acquired by the optical device 10 of the present invention also has a higher resolution. Therefore, when using the optical device 10 of the present invention, an optical system operating through a stable see-through lens can be obtained, and this optical system can be used to provide an augmented reality realization device capable of acquiring clearer images.

[0123] Figure 6 This is a diagram used to illustrate another embodiment of the present invention.

[0124] As described above, the reflective part 11 of the present invention generates a pinhole effect by increasing the depth of field. At this time, the function of a focusing optical system, a reflecting optical system, or an aperture can be performed simultaneously by adjusting the curvature, shape, position, etc. of the reflective part 11, and the curvature, shape, and position of the reflective part 11 can be freely manufactured.

[0125] Reference Figure 6 It can be seen that the inclined surface on which the reflective part 11 is formed is a curved surface rather than a plane. In this case, the reflective part 11 is also formed as a curved surface corresponding to the shape of the curved surface described above.

[0126] Right now, Figure 6 Implementation examples and Figure 2 and Figure 3 The manufacturing process shown in the embodiments is performed in the same way, but the difference is that the first surface 211 of the first optical element 121 on which the reflective portion 11 is formed and the second surface 221 of the second optical element 122 (in the first embodiment) or the inclined surface 211 of the optical element 121 (in the embodiment) are made to reflect the first surface 211 of the first optical element 121 on which the reflective portion 11 is formed. Figure 3 (In the embodiment) it is formed as a curved surface and the surface of the reflective part 11 is also formed as a curved surface corresponding to the above-described curved surface.

[0127] Figure 7 This is a diagram used to illustrate another embodiment of the present invention.

[0128] Figure 7 Implementation examples and Figure 2 The embodiments are basically the same, but the feature is that the thickness direction of the first surface 211 and the second surface 221 is partially inclined relative to a pair of corresponding surfaces of the first optical element 121 and the second optical element 122.

[0129] exist Figure 2 In the embodiment, although the first surface 211 and the second surface 221 are formed in a shape that is always inclined along the thickness direction, however, with Figure 2 The difference in the embodiments is that, in Figure 7In the embodiment, the tilt is only relative to a portion and not tilted along the entire thickness direction.

[0130] like Figure 7 As shown in (a), a first optical element 121 and a second optical element 122, with the first surface 211 and the second surface 221 partially inclined relative to the thickness direction, are prepared as follows: Figure 2 As shown, a reflective portion is formed on the first surface 211 of the first optical element 121. Furthermore, when... Figure 2 When the first optical element 121 and the second optical element 122 are tightly attached and fixed as shown, they can be used as follows: Figure 7 As shown in (b), an optical device 10 is formed.

[0131] on the other hand, Figure 7 The text describes two optical elements, specifically the case where the optical device 10 is formed using a first optical element 121 and a second optical element 122. However, separate optical elements, such as a third optical element, can also be used. For example, a third optical element can be used where the portion other than the first surface 211 of the first optical element 121 is divided. In this case, the third optical element can be adhered and fixed to the first optical element using an adhesive, and is formed of a material having the same refractive index as the first optical element.

[0132] Figure 8 This is a diagram illustrating yet another embodiment of the present invention.

[0133] Figure 8 The embodiments are designed to form a plurality of reflective portions 11, which, when combined with... Figure 2 When compared with the embodiments, the feature is that the corresponding surfaces of the first optical element 121 and the second optical element 122 are formed in multiple pairs. That is, compared with Figure 2 The difference in the embodiments is that multiple pairs of corresponding surfaces are formed.

[0134] like Figure 8 As shown in (a), the first surface 211 of the first optical element 121 is formed in a serrated shape as a plurality of surfaces, and the second surface 221 of the second optical element 122 is also formed in a serrated shape as a plurality of surfaces corresponding to the first surface 211 of the first optical element 121. Each first surface 211 of the first optical element 121 forms a reflective portion 11, and when the reflective portion 11 is tightly attached and fixed using an adhesive, a structure can be formed as shown in (a). Figure 8 The optical device 10 shown in (b)

[0135] If multiple reflective portions 11 are formed on each of the first surfaces 211, an optical device 10 in which reflective portions 11 are arranged in an array can be obtained.

[0136] Figures 9 to 12It is used to explain the basis Figure 8 The diagram shown illustrates the process of forming the optical device 10 in the embodiment.

[0137] First, refer to Figure 9 , preparation as Figure 8 The first optical element 121 and the second optical element 122 shown have surfaces that correspond to each other in a sawtooth shape. When... Figure 10 As shown, when the reflective portion 11 is formed on each of the first surfaces 211 of the first optical element 121 by mask evaporation, it can be as follows: Figure 11 As shown, when the first optical element 121 and the second optical element 122 are tightly attached and fixed with adhesive as described above, the following can be obtained: Figure 12 The optical device 10 shown.

[0138] In the foregoing, the present invention has been described by way of specific details such as specific constituent elements and limited embodiments and drawings. However, this is provided for the purpose of facilitating a more comprehensive understanding of the present invention. The present invention is not limited to the above embodiments, and those skilled in the art can make various modifications and variations to the above description.

[0139] Therefore, the concept of the present invention should not be limited to the embodiments described above, and the claims and all modifications equivalent to or related to the claims fall within the scope of the concept of the present invention.

Claims

1. A method for manufacturing an optical device, characterized in that, include: The steps of preparing to form a first optical element and a second optical element having multiple pairs of corresponding surfaces; The step of forming a plurality of reflective portions on each first surface of a plurality of first optical elements in a plurality of said pair of corresponding surfaces; as well as The step of closely attaching and fixing the first optical element and the second optical element to form an optical device. The first optical element and the second optical element have a pair of corresponding surfaces formed in a way that they are in close contact when they come into contact with each other. Each pair of corresponding surfaces of the first optical element and the second optical element are respectively formed into interlocking sawtooth shapes. Each of the plurality of reflective parts is formed of a metal material less than 8mm thick. In the step of forming the plurality of reflective portions, on each of the first surfaces of the first optical element that are formed in a sawtooth shape, a plurality of metallic reflective portions are formed at intervals along the first surface and spaced apart from the peaks and valleys of the sawtooth-shaped first surface by mask evaporation, so as to form a plurality of reflective portions arranged in an array. The first optical element and the second optical element are made of the same material with the same refractive index. In the step of forming an optical device by closely attaching and fixing the first optical element and the second optical element, the first optical element and the second optical element are bonded together using an adhesive made of a material having the same refractive index as the first optical element and the second optical element.

2. The method for manufacturing the optical device according to claim 1, characterized in that, The optical device is formed by bonding and fixing the first optical element and the second optical element together with the adhesive to cure the first optical element and the second optical element bonded together with the adhesive.

3. The method for manufacturing the optical device according to claim 1, characterized in that, The first optical element and the second optical element have a pair of corresponding surfaces and a reflective portion that are respectively formed as curved surfaces.

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