Optical member, virtual image display device, and method for measuring optical member

Abstract

An optical component, a virtual image display device, and a measurement method for the optical component. While measuring multiple optical surfaces, the relative tilt and arrangement relationships between the multiple optical surfaces are accurately determined. The optical component (10, 210) has multiple effective optical surfaces (11a, 11b, 11c), and is accompanied by multiple measurement reference components (16, 17) each having a reference related to the arrangement of the multiple effective optical surfaces (11a, 11b, 11c). In this case, the relative positional relationships of the effective optical surfaces (11a, 11b, 11c) can be determined, and the optical performance of the optical component (10, 210) can be accurately evaluated.

Description

Technical Field

[0001] The present invention relates to optical components assembled in head-worn display devices, virtual image display devices assembled with optical components, and methods for measuring optical components. Background Technology

[0002] Regarding imaging optical systems assembled in display devices, a method is disclosed in which an edge with a cylindrical shape and a horizontal reference surface are provided on an optical component constituting the imaging optical system (specifically, on a lens with a freeform surface). The edge defines the center of the lens and a surface perpendicular to the optical axis, and the horizontal reference surface defines a horizontal surface. Thus, the edge and the horizontal reference surface can be used to measure the lens and mount it to the lens barrel (Patent Document 1).

[0003] In the shape measurement of optical components, especially when evaluating optical components with special optical surfaces such as freeform surfaces, contact or non-contact measuring devices are used to obtain surface accuracy measurement data, and tool microscopes are used to obtain dimensional data of each part relative to the design reference. However, the position and tilt of optical surfaces are mostly not combined with the above-mentioned dimensional data, but are usually determined by fitting model data and measurement data.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2007-127865

[0005] For imaging optical systems assembled in head-worn virtual image display devices, higher field of view and higher precision are required. On the other hand, small size and lightweight are also necessary for good wearability. To balance high optical performance and miniaturization, the number of lenses that can be used is limited, and the optical components must often employ complex shapes such as freeform surfaces. Furthermore, it is necessary to assemble optical components with different incident and exit axes, such as wedge lenses. For optical components used in such virtual image display devices, it is difficult to accurately determine the relative tilt and arrangement relationships between multiple surfaces using the aforementioned method of fitting model data with measurement data. Moreover, the aforementioned non-contact measurement devices have limitations in terms of the tilt that can be measured. If the tilt of the object becomes steep, surface measurement becomes impossible. Therefore, in most cases, it is impossible to measure the relative arrangement relationships of multiple optical surfaces. Summary of the Invention

[0006] An optical component of one aspect of the present invention has a plurality of optically effective surfaces, and is accompanied by a plurality of measurement reference components, each having a reference given to a configuration of the plurality of optically effective surfaces. Attached Figure Description

[0007] Figure 1 It is a three-dimensional diagram illustrating the optical components.

[0008] Figure 2 This is a diagram illustrating a pair of main surfaces of an optical component.

[0009] Figure 3 This is a side view of the optical components.

[0010] Figure 4 This is a conceptual diagram illustrating the measurement system for optical components.

[0011] Figure 5 This is a perspective view of one side of the optical component in the modified example.

[0012] Figure 6 This is a perspective view illustrating the other side of the optical component in the modified example.

[0013] Figure 7 This is a side view of the optical component in a modified example.

[0014] Figure 8 This is a three-dimensional view illustrating the appearance of an HMD with assembled optical components in its wearing state.

[0015] Figure 9 It's a 3D view of the HMD's exterior and interior after removing the external components.

[0016] Figure 10 Showing the top and side views of the optical unit.

[0017] Figure 11 This is a conceptual side sectional view illustrating the internal optical system of the HMD.

[0018] Figure 12 This diagram illustrates the method of fixing the prism mirror and the wedge-shaped optical element.

[0019] Figure 13 This diagram illustrates the fixation of the projection lens relative to the main optical block.

[0020] Label Explanation

[0021] 1: Measurement system; 2, 3: Measuring device; 4: Information processing device; 10, 210: Optical components; 11: Main body; 11a, 11b, 11c: Effective optical surfaces; 12: Frame; 14: Protrusion; 14a: Surface; 16, 17: Measurement reference components; 16a, 17a: Measurement reference shapes; 21: Projection lens; 21p, 21q: Lenses; 22: Prism mirror; 23: Wedge-shaped optical element; 25: Lens; 30: Optical block main body; 31: Lens barrel; 41a, 41b: Image element; 61a, 61b: Frame; 78: Fixing component; 91: Circuit board; 00: Optical projection unit; 100a, 100b: Display device; 103a, 103b: Combiner; 300: Virtual image display device; 300a: Main device; 300b: Support device; AX: Optical axis; Da, Db, Dc: Direction; EY: Eye; ML: Image light; MR: Reflecting surface; O1, O2: Origin; OB: Optical block; PP: Pupil position; RL11, RL12, RL13: Measurement reference lines; RL21, RL22, RL23: Measurement reference lines; RS21, RS22, RS23: Measurement reference plane; SS: Step difference; US: Wearer. Detailed Implementation

[0022] Hereinafter, embodiments of the optical components and virtual image display device of the present invention will be described with reference to the accompanying drawings.

[0023] Figures 1-3 This is a diagram illustrating the external shape of the optical component 10 according to the embodiment. Figure 2 In the diagram, region AR1 is the front view of optical component 10, and region AR2 is the rear view of optical component 10. Figure 1 In the coordinate system, x, y, and z are orthogonal coordinates, representing the reference orientation of the optical component 10.

[0024] The optical component 10 is a wedge-shaped lens with different incident and emission axes, and has a body 11 with a circular outline and a rectangular frame 12 surrounding the outer periphery of the body 11.

[0025] The main body 11 has a first optically effective surface 11a and a second optically effective surface 11b as multiple optically effective surfaces. The first optically effective surface 11a is, for example, a freeform surface, but it can also be an aspherical or spherical surface. The second optically effective surface 11b is also, for example, a freeform surface, but it can also be an aspherical or spherical surface. The first optically effective surface 11a and the second optically effective surface 11b face approximately opposite directions, but are in a state where the incident axis X1 and the emission axis X2 are not parallel and are slightly inclined to each other. The direction Da of the first optically effective surface 11a and the direction Db of the second optically effective surface 11b form an angle θ of about 170°, which can be said to be an angle of more than 90° to each other. Regarding the direction Da of the first optically effective surface 11a, it is possible to form a normal to a plane that approximates the first optically effective surface 11a or an axis of symmetry of a plane that approximates the rotational symmetry plane, without taking the incident axis X1, which is equivalent to the optical axis, as a reference. At this time, the plane or rotational symmetry plane that approximates the first optical effective surface 11a is not limited to approximating the entire region of the first optical effective surface 11a; for example, it can also approximate the central region. Similarly, regarding the direction Db of the second optical effective surface 11b, it is possible, without taking the emission axis X2 (equivalent to the optical axis) as a reference, to form the normal to the plane approximating the second optical effective surface 11b or the axis of symmetry of the approximate rotational symmetry plane.

[0026] On the frame 12, a protrusion 14 is formed on the side of the first optically effective surface 11a, surrounding the first optically effective surface 11a. The surface 14a of the protrusion 14 is a flat surface inclined relative to the flat surface 12a of the frame 12, thereby reducing the step difference SS between the protrusion and the outer edge OE1 of the first optically effective surface 11a. Therefore, the first optically effective surface 11a and the surface 14a disposed nearby extend continuously, allowing them to be disposed in the same measurement area and measured together in non-contact measurement using a microscope or the like, and in contact measurement using a probe or the like. In this way, by reducing the step difference SS between the protrusion and the outer edge OE1 of the first optically effective surface 11a, especially in contact measurement, it is easy to measure the first optically effective surface 11a and the surface 14a disposed nearby simultaneously.

[0027] A portion of the protrusion 14 becomes a measurement reference component 16, which is a reference given the configuration of the first optically effective surface 11a, and includes a measurement reference shape 16a. The measurement reference component 16 is a protruding portion formed in the frame 12. The measurement reference shape 16a includes three measurement reference surfaces RS11, RS12, and RS13, and three measurement reference lines RL11, RL12, and RL13. Here, the measurement reference line RL11 corresponds to the intersection line of a pair of measurement reference surfaces RS11 and RS12, the measurement reference line RL12 corresponds to the intersection line of a pair of measurement reference surfaces RS12 and RS13, and the measurement reference line RL13 corresponds to the intersection line of a pair of measurement reference surfaces RS13 and RS11. The measurement reference shape 16a is assigned an origin O1 and local coordinates x1, y1, and z1 with respect to the first surface F1 containing the first optically effective surface 11a. Assume that the local coordinates x1, y1, z1 are parallel to the overall orthogonal coordinate system x, y, z, but assume that they are not strictly parallel in the actual object. In the example shown, the local coordinate x1 is consistent with the measurement baseline RL11, the local coordinate y1 is located on the extension of the measurement baseline RL12, and the local coordinate z1 is slightly inclined relative to the extension of the measurement baseline RL13.

[0028] The surface 12b of frame 12 reduces the step difference SS between it and the outer edge OE2 of the second optically effective surface 11b. Therefore, the second optically effective surface 11b and the surface 14b disposed nearby extend continuously, allowing them to be disposed within the same measurement area and measured together in both non-contact measurements using microscopes or contact measurements using probes. Thus, by reducing the step difference SS between it and the outer edge OE2 of the second optically effective surface 11b, especially in contact measurements, it is easy to measure the second optically effective surface 11b and the surface 12b disposed nearby simultaneously.

[0029] A portion of the second optical effective surface 11b side in frame 12 becomes a measurement reference component 17, which is a reference given the configuration of the second optical effective surface 11b, and includes an overall reference shape 17a. The measurement reference component 17 is a protruding portion formed in frame 12. The overall reference shape 17a corresponds to a design reference that serves as a reference in the design of the optical component 10. The overall reference shape 17a includes three measurement reference surfaces RS21, RS22, and RS23, and three measurement reference lines RL21, RL22, and RL23. Here, the measurement reference line RL21 corresponds to the intersection line of a pair of measurement reference surfaces RS21 and RS22, the measurement reference line RL22 corresponds to the intersection line of a pair of measurement reference surfaces RS22 and RS23, and the measurement reference line RL23 corresponds to the intersection line of a pair of measurement reference surfaces RS23 and RS21. The measurement reference shape 17a assigns an origin O2 and local coordinates x2, y2, and z2 with respect to the second surface F2 containing the second optical effective surface 11b. Assume that the local coordinates x2, y2, z2 are parallel to the overall orthogonal coordinate system x, y, z, but assume that they are not strictly parallel in the actual object. In the illustrated example, the local coordinate x2 coincides with the measurement baseline RL21, and the local coordinate z2 lies on the extension of the measurement baseline RL23. Additionally, the local coordinate y2 lies on the extension of the imaginary intersection line (not shown) of a pair of measurement reference planes RS22 and RS23.

[0030] Figure 4 This is a conceptual diagram illustrating the measurement system 1 for the optical component 10. The measurement system 1 evaluates the shape accuracy, including the optical accuracy of the optical component 10, by combining two measurement methods. The measurement system 1 includes a first measuring device 2, a second measuring device 3, and an information processing device 4.

[0031] The first measuring device 2 is, for example, a known three-dimensional shape measuring device, comprising a measuring head 2a, a stage 2b, and a drive control device 2c. When the first measuring device 2 is a three-dimensional shape measuring device, the measuring head 2a can, for example, perform contact-type shape measurement using a probe with three-dimensional displacement. The stage 2b supports the optical component 10 via a holder 2h, allowing the optical component 10 to be configured and positioned as desired. The drive control device 2c detects the surface shape of the optical component 10 with high precision by moving the measuring head 2a and the stage 2b. The drive control device 2c temporarily holds the measurement results of the surface shape of the optical component 10 and outputs the surface measurement data to the information processing device 4. Using the first measuring device 2, surfaces and lines forming characteristic shapes formed within or outside the optical surface of the optical component 10 can be measured, and the position and orientation of the characteristic shapes can be determined. When the optical component 10 has multiple optical surfaces and it is not possible to measure multiple optical surfaces simultaneously, the first measuring device 2 performs a remeasurement of the optical component 10 after resetting it by reversing the optical component 10 relative to the holder 2h.

[0032] The second measuring device 3 is, for example, a known tool microscope, and includes a measuring head 3a, a stage 3b, and a drive control device 3c. When the second measuring device 3 is a tool microscope, the measuring head 3a can perform non-contact dimensional measurements, for example, using a camera optical system or image sensor. The stage 3b supports the optical component 10 via a holder 3h, allowing the optical component 10 to be configured and positioned as desired. The drive control device 3c moves the measuring head 3a and the stage 3b, and through image processing of the obtained image data, measures the shape information such as the configuration and dimensions of each part of the optical component 10 with high precision. The drive control device 3c temporarily holds the shape information of the optical component 10 and outputs the shape measurement data to the information processing device 4. The second measuring device 3 can measure surfaces and lines forming characteristic shapes within or outside the optical surface of the optical component 10, and can determine the position and orientation of the characteristic shapes. When determining the position and orientation of the characteristic shapes, processing is performed to assist in the measurement by fitting a scaling or graphic model to an object image. Furthermore, by using the stage 3b to change the posture of the optical component 10 while observing from various directions, the measurement accuracy of characteristic shapes can be improved.

[0033] The information processing device 4 is a computer, comprising an arithmetic processing unit 4a and a storage unit 4b. The arithmetic processing unit 4a calculates unified measurement information for the overall shape of the optical component 10 based on surface measurement data obtained from the first measuring device 2 and shape measurement data obtained from the second measuring device 3, and stores the calculation results in the storage unit 4b. The information processing device 4 determines the shape and configuration of multiple optical surfaces of the optical component 10 by merging the shape measurement data obtained from the second measuring device 3 related to a common reference and the multiple surface measurement data obtained from the first measuring device 2 related to the same optical component 10, and evaluates the optical performance of the optical component 10.

[0034] right Figure 3 The specific measurements of the optical component 10 shown will be explained. First, using... Figure 4 The first measuring device 2 shown measures the first surface F1 of the optical component 10. The measurement result of the first surface F1 of the optical component 10 includes information related to the three-dimensional shape of the first effective optical surface 11a and information related to the three-dimensional shape of the measurement reference shape 16a. The information processing device 4 determines the reference information of the first surface F1 (specifically, the origin O1 and local coordinates x1, y1, z1) based on the three-dimensional shape of the measurement reference shape 16a, and transforms the three-dimensional shape of the first effective optical surface 11a into coordinate information based on the local coordinates x1, y1, z1. In this coordinate transformation, a known coordinate transformation method is used (i.e., rotation, translation, and other operations using matrices and vectors). Next, the first measuring device 2 measures the second surface F2 of the optical component 10. The measurement result of the second surface F2 of the optical component 10 includes information related to the three-dimensional shape of the second effective optical surface 11b and information related to the three-dimensional shape of the measurement reference shape 17a. The information processing device 4 determines the reference information of the second surface F2 (specifically, the origin O2 and local coordinates x2, y2, z2) based on the three-dimensional shape of the measurement reference shape 17a, transforming the three-dimensional shape of the second effective optical surface 11b into coordinate information based on the local coordinates x2, y2, z2. In this coordinate transformation, a known coordinate transformation method is used. Then, using… Figure 4The second measuring device 3, as shown, simultaneously measures the measurement reference shape 16a of the first surface F1 and the measurement reference shape 17a of the second surface F2. During the measurement using the second measuring device 3, information related to the relative configuration of local coordinates x1, y1, z1 and local coordinates x2, y2, z2 can be obtained. The information processing device 4 can calculate and evaluate the relative rotation and translation amounts of the local coordinates x1, y1, z1 and local coordinates x2, y2, z2. Therefore, using the shared single local coordinates x2, y2, z2 as a reference—that is, using the design reference—the three-dimensional shape of the first optical effective surface 11a and the three-dimensional shape of the second optical effective surface 11b can be determined, and the relative configuration of the first optical effective surface 11a and the second optical effective surface 11b can be determined, thereby enabling a comprehensive evaluation of the optical performance of the optical component 10.

[0035] During the above measurements, the reference shapes 16a and 17a were used (refer to...). Figure 2 (etc.) includes reference surfaces and reference lines that constitute the protruding shape, thereby making it easy to measure using measuring devices 2 and 3.

[0036] Figures 5-7 This is a diagram illustrating the external shape of the optical component 210 in the modified example. Figure 5 In the diagram, region BR1 is a perspective view showing one end of the optical component 210 in the lateral direction, and region BR2 is a perspective view showing the other end of the optical component 210 in the lateral direction.

[0037] The optical component 210 is a prism lens with a reflective surface inside, comprising: a body 11 having a profile that approximates a triangular prism; and a frame 12 disposed at both ends of the body 11.

[0038] The main body 11 has a first optically effective surface 11a, a second optically effective surface 11b, and a third optically effective surface 11c, which are multiple optically effective surfaces. The first optically effective surface 11a is, for example, a freeform surface, but it can also be an aspherical or spherical surface. The second optically effective surface 11b is a reflective surface MR with a reflective film formed on it, and it is, for example, a freeform surface, but it can also be an aspherical or spherical surface. The third optically effective surface 11b is, for example, a freeform surface, but it can also be an aspherical or spherical surface. The incident axis X1 of the outer side of the first optically effective surface 11a, the principal axis X3 of the second optically effective surface 11b, and the emission axis X2 of the third optically effective surface 11c are located on the same plane, but are inclined to each other. Here, the principal axis X3 of the second optically effective surface 11b corresponds to the bisecting line of the optical axis that passes through the interior of the main body 11 and is reflected by the inner surface of the second optically effective surface 11b. The direction Da reflecting the incident axis X1 of the first optically effective surface 11a and the direction Dc reflecting the emission axis X2 of the third optically effective surface 11c form an angle of 90° or less with each other. On the other hand, the direction Da reflecting the incident axis X1 of the first optically effective surface 11a or the direction Dc reflecting the emission axis X2 of the third optically effective surface 11c forms an angle of 90° or more with respect to the direction Db reflecting the principal axis X3 of the second optically effective surface 11b.

[0039] On frame 12, a protrusion 14 is formed such that it sandwiches the first optically effective surface 11a and the third optically effective surface 11c from the periphery. The surface 14a of the protrusion 14 reduces the step difference SS between the protrusion and the outer edge OE1 of the first optically effective surface 11a, and the step difference SS between the protrusion and the outer edge OE3 of the third optically effective surface 11c. Therefore, the first optically effective surface 11a and the surface 14a disposed nearby extend continuously, and the third optically effective surface 11c and the surface 14a disposed nearby extend continuously. In non-contact measurement using a microscope or the like, and in contact measurement using a probe or the like, they can be disposed in the same measurement area and can be measured together. In this way, by reducing the step difference SS between the outer edge OE1 of the first optical effective surface 11a and the outer edge OE3 of the third optical effective surface 11c, especially in contact measurement, it is easy to measure the first optical effective surface 11a and the third optical effective surface 11c, as well as the surface 14a disposed nearby, together.

[0040] A portion of the protrusion 14 becomes a measurement reference component 16, which is a common reference associated with the configuration of the first optical effective surface 11a and the third optical effective surface 11c, and includes a measurement reference shape 16a. The measurement reference component 16 is a common measurement component. The measurement reference shape 16a includes three measurement reference surfaces RS11, RS12, and RS13, and three measurement reference lines RL11, RL12, and RL13. Here, the measurement reference line RL11 corresponds to the intersection line of a pair of measurement reference surfaces RS11 and RS12, the measurement reference line RL12 corresponds to the intersection line of a pair of measurement reference surfaces RS12 and RS13, and the measurement reference line RL13 corresponds to the intersection line of a pair of measurement reference surfaces RS13 and RS11. The measurement reference shape 16a is assigned an origin O1 and local coordinates x1, y1, and z1 with respect to the first surface F1 containing the first optical effective surface 11a and the third optical effective surface 11c. The local coordinates x1, y1, and z1 are perpendicular to each other, but not parallel to the overall orthogonal coordinate system x, y, and z. In the example shown, the local coordinate x1 coincides with the measurement baseline RL11, the local coordinate y1 coincides with the measurement baseline RL12, and the local coordinate z1 lies on the extension of the measurement baseline RL13.

[0041] The surface 12b of frame 12 reduces the step difference SS between it and the outer edge OE2 of the second optically effective surface 11b. Therefore, the second optically effective surface 11b and the surface 14b disposed nearby extend continuously, allowing them to be disposed within the same measurement area and measured together in both non-contact measurements using microscopes or contact measurements using probes. Thus, by reducing the step difference SS between it and the outer edge OE2 of the second optically effective surface 11b, especially in contact measurements, it is easy to measure the second optically effective surface 11b and the surface 12b disposed nearby simultaneously.

[0042] A portion of the second optical effective surface 11b side in frame 12 becomes a measurement reference component 17, which is a reference given the configuration of the second optical effective surface 11b, and includes an overall reference shape 17a. The overall reference shape 17a corresponds to a design reference that serves as a reference in the design of the optical component 210. The overall reference shape 17a includes three measurement reference surfaces RS21, RS22, and RS23, and three measurement reference lines RL21, RL22, and RL23. Here, measurement reference line RL21 corresponds to the intersection line of a pair of measurement reference surfaces RS21 and RS22, measurement reference line RL22 corresponds to the intersection line of a pair of measurement reference surfaces RS22 and RS23, and measurement reference line RL23 corresponds to the intersection line of a pair of measurement reference surfaces RS23 and RS21. The measurement reference shape 17a assigns an origin O2 and local coordinates x2, y2, and z2 with respect to the second surface F2 containing the second optical effective surface 11b. The local coordinates x2, y2, and z2 are orthogonal to each other, but not parallel to the overall orthogonal coordinate system x, y, and z. In the example shown, the local coordinate x2 coincides with the measurement baseline RL21, the local coordinate y2 lies on the extension of the measurement baseline RL22, and the local coordinate z2 lies on the extension of the measurement baseline RL23.

[0043] The specific measurements of optical component 210 will be explained. First, using... Figure 4 The first measuring device 2 shown measures the first surface F1 of the optical component 210. The measurement result of the first surface F1 of the optical component 210 includes information related to the three-dimensional shapes of the first effective optical surface 11a and the third effective optical surface 11c, and information related to the three-dimensional shape of the measurement reference shape 16a. The information processing device 4 determines the reference information of the first surface F1 (specifically, the origin O1 and local coordinates x1, y1, z1) based on the three-dimensional shape of the measurement reference shape 16a, and transforms the three-dimensional shapes of the first effective optical surface 11a and the third effective optical surface 11c into coordinate information based on the local coordinates x1, y1, z1. In this coordinate transformation, a known coordinate transformation method is used (i.e., rotation, translation, and other operations using matrices and vectors). Next, the first measuring device 2 measures the second surface F2 of the optical component 210. The measurement result of the second surface F2 of the optical component 210 includes information related to the three-dimensional shape of the second effective optical surface 11b and information related to the three-dimensional shape of the measurement reference shape 17a. The information processing device 4 determines the reference information of the second surface F2 (specifically, the origin O2 and local coordinates x2, y2, z2) based on the three-dimensional shape of the measurement reference shape 17a, transforming the three-dimensional shape of the second effective optical surface 11b into coordinate information based on the local coordinates x2, y2, z2. In this coordinate transformation, a known coordinate transformation method is used. Then, using… Figure 4The second measuring device 3, as shown, simultaneously measures the measurement reference shape 16a of the first surface F1 and the measurement reference shape 17a of the second surface F2. During the measurement using the second measuring device 3, information related to the relative configuration of local coordinates x1, y1, z1 and local coordinates x2, y2, z2 can be obtained. The information processing device 4 can calculate and evaluate the relative rotation and translation amounts of the local coordinates x1, y1, z1 and local coordinates x2, y2, z2. Therefore, using a shared single local coordinate x2, y2, z2 as a reference, i.e., a design reference, the three-dimensional shapes of the first optical effective surface 11a, the second optical effective surface 11b, and the third optical effective surface 11c can be determined, and their relative configuration relationships can be established, thereby enabling a comprehensive evaluation of the optical performance of the optical component 210.

[0044] In the case of optical component 210, even if the multiple optical effective surfaces 11a and 11c are separated from each other, a common measurement reference component (common measurement component) 16 can be set for the multiple optical effective surfaces 11a and 11c. By sharing the same component, the measurement reference component (common measurement component) 16 can be formed in a space-saving manner. In addition, not limited to the above, measurement reference components can also be set for the optical effective surfaces 11a to 11c separately.

[0045] Figure 8 This indicates that the assembly has Figure 1 , 5 The diagram shows the wearing state of the virtual image display device 300, which includes optical components 10 and 210. The virtual image display device 300 is a head-mounted display device, also known as a head-mounted display (HMD) 301, which allows the observer or wearer US to recognize an image as a virtual image. Figure 8 In this coordinate system, X, Y, and Z form an orthogonal coordinate system. The +X direction corresponds to the horizontal alignment of the EY pairs of the observer's or wearer's eyes (US) when wearing the HMD 301. The +Y direction corresponds to the top, perpendicular to the horizontal alignment of the EY pairs of the wearer's eyes (US). The +Z direction corresponds to the front or forward direction (US) when wearing the HMD 301. The ±Y directions are parallel to the vertical axis or vertical direction. Furthermore, the coordinate system X, Y, and Z are aligned with... Figure 1 The premise is that the local coordinates x1, y1, z1 or the local coordinates x2, y2, z2 shown are inconsistent.

[0046] The virtual image display device 300 has a main body 300a configured to cover the eyes of the wearer US, and a pair of temple-shaped support devices 300b supporting the main body 300a. Functionally, the main body 300a includes a first display device 100a for the left eye and a second display device 100b for the right eye. The first display device 100a consists of a first display driving unit 102a disposed on the upper part and a first combiner 103a covering the eyes in the shape of an eyeglass lens. Similarly, the second display device 100b consists of a second display driving unit 102b disposed on the upper part and a second combiner 103b covering the eyes in the shape of an eyeglass lens.

[0047] Reference Figure 9 The structure of the main body 300a of the virtual image display device 300 will be explained. Figure 9 In the diagram, region CR1 is a perspective view of the exterior of the main device 300a, and region CR2 is a perspective view that exposes the interior of the main device 300a.

[0048] In the main body 300a, a pair of display driving units 102a and 102b located on the +Y side, i.e., the upper side, are connected and integrated, and are covered by a horizontally elongated dome-shaped upper outer component 107a and a flat plate-shaped lower outer component 107b. The first combiner 103a and the second combiner 103b have a shape that cuts off the upper part of a hemisphere that protrudes forward, i.e., in the +Z direction, and are configured to protrude downward from the lower outer component 107b.

[0049] The first display device 100a for the left eye includes a first image element 41a, a first optical system 20a, a first frame 61a, and a first combiner 103a. The first optical system 20a and the first combiner 103a are fixed to the first frame 61a, and the first image element 41a is fixed to the first optical system 20a. The second display device 100b for the right eye includes a second image element 41b, a second optical system 20b, a second frame 61b, and a second combiner 103b. The second display device 100b for the right eye has the same structure and function as the first display device 100a for the left eye. That is, the second image element 41b is the same as the first image element 41a, the second optical system 20b is the same as the first optical system 20a, and the second combiner 103b is the same as the first combiner 103a.

[0050] The first display device 100a and the second display device 100b are internally connected and fixed via a fixing member 78. Specifically, the fixing member 78 centrally supports a pair of frames 61a and 61b assembled to the pair of display devices 100a and 100b, maintaining the relative positioning of the first display device 100a and the second display device 100b. One of the first frames 61a is a semi-circular plate-shaped metal component, connected to one end of a metal rod-shaped fixing member 78 near the inner end of the second frame 61b. The other second frame 61b is a semi-circular plate-shaped metal component, connected to the other end of the rod-shaped fixing member 78 near the inner end of the first frame 61a. The pair of frames 61a and 61b are arranged to close a pair of openings formed in the lower outer component 107b and having the same outline.

[0051] A rectangular circuit board 91 is disposed above the fixed component 78 and between the left and right display devices 100a and 100b. The circuit board 91 includes a control device 92 that controls the display operation of the first image element 41a and the second image element 41b. The control device 92 outputs drive signals corresponding to the displayed images to the left and right image elements 41a and 41b, thereby controlling the display operation of the left and right image elements 41a and 41b. The control device 92 includes, for example, an IF circuit and a signal processing circuit, and enables the left and right image elements 41a and 41b to perform two-dimensional image display based on image data or image signals received from the outside. Although not shown in the figure, the control device 92 includes a main board that has an interface function for communication with an external device (not shown) and an integrated function for coordinating the operation of the first display device 100a and the operation of the second display device 100b.

[0052] Figure 10 This refers to the optical unit 100 that constitutes the first display device 100a. In Figure 10 In the diagram, region DR1 is a top view of the optical unit 100, and region DR2 is a side view of the optical unit 100. The optical unit 100 is an imaging optical system having a first optical system 20a, a first frame 61a, and a first combiner 103a, also referred to as an optical module. By assembling the first image element 41a into the optical unit 100, it becomes a first display device 100a.

[0053] In the optical unit 100, the first optical system 20a is fixed to the upper surface of the plate-shaped first frame 61a by adhesive or the like, and the first combiner 103a is fixed to the front half of the periphery of the first frame 61a by adhesive or the like at its upper end. The first optical system 20a includes a lens barrel 31 that supports optical elements. The lens barrel 31 is a support member disposed between the prism mirror 22 and the first combiner 103a, etc., supporting the prism mirror 22 at its upper part on the +Y side, and fixed to the first frame 61a at its lower part via a wedge-shaped optical element 23. The prism mirror 22 supports the projection lens 21, which is the first optical element, at its front, i.e., on the +Z side, and the projection lens 21 supports the first image element 41a at its end opposite to the prism mirror 22 via a first retainer 72a.

[0054] Figure 11 This is a side sectional view illustrating the optical structure of the first display device 100a. The first display device 100a has a first image element 41a and an optical unit 100. The optical unit 100 includes a projection lens 21, a prism reflector 22, a wedge-shaped optical element 23, and a lens 25 as optical elements. The projection lens 21, prism reflector 22, and wedge-shaped optical element 23 in the optical unit 100 are... Figure 9 Corresponding to the first optical system 20a shown, the lens 25 corresponds to the first combiner 103a. In the optical unit 100, the wedge-shaped optical element 23 is arranged in a stepped manner, embedded in the optical opening OA formed in the first frame 61a.

[0055] The first image element 41a is a self-emissive display device. The first image element 41a is, for example, an organic EL (organic electro-luminescence) display, which forms a colored static or dynamic image on a two-dimensional display surface 41d. The first image element 41a is not limited to organic EL displays; it can be replaced by a micro-LED display, or a display device using inorganic EL, organic LED, laser array, quantum dot light-emitting elements, etc. The first image element 41a is not limited to a self-emissive image light generating device; it can also be composed of a light modulation element such as an LCD, forming an image by illuminating the light modulation element with a light source such as a backlight. As the first image element 41a, LCOS (Liquid crystal on silicon; LCoS is a registered trademark), digital micromirror devices, etc., can also be used instead of LCDs.

[0056] The projection lens 21 includes a first lens 21p and a second lens 21q. The first lens 21p has an incident surface 21a and an exit surface 21b, and the second lens 21q has an incident surface 21c and an exit surface 21d. The projection lens 21 receives image light ML emitted from the first image element 41a and directs it onto the prism reflector 22. The projection lens 21 converges the image light ML emitted from the first image element 41a into a near-parallel beam. The prism reflector 22 has an incident surface 22a, an inner reflecting surface 22b, and an exit surface 22c. The prism reflector 22 causes the image light ML incident from the front to be refracted in a direction tilted downward relative to the direction that reverses the incident direction (the direction of the light source observed from the prism reflector 22). The wedge-shaped optical element 23 has an incident surface 23a and an exit surface 23b, allowing the image light ML emitted from the prism reflector 22 and directed toward the lens 25 to pass through. The lens 25 has a reflecting surface 25a and an outer surface 25o. The lens 25 magnifies the intermediate image formed on the light-emitting side of the prism reflector 22.

[0057] The prism reflector 22 is equivalent to the above. Figure 4 The incident surface 22a, inner reflecting surface 22b, and exit surface 22c of the prism reflector 22 in the optical component 210 shown correspond to the first effective optical surface 11a, the second effective optical surface 11b, and the third effective optical surface 11c of the optical component 210, respectively. The wedge-shaped optical element 23 corresponds to... Figure 1 The incident surface 23a and the exit surface 23b of the wedge-shaped optical element 23 of the optical component 10 shown correspond to the first optical effective surface 11a and the second optical effective surface 11b of the optical component 10, respectively.

[0058] The optical unit 100 is an off-axis optical system OS because the lens 25 is a concave mirror or the like. In this embodiment, the projection lens 21, prism mirror 22, wedge optical element 23, and lens 25 are arranged non-axially symmetrically, having optical surfaces that are non-axially symmetrical about the YZ plane and intersecting the optical axis AX, and symmetrical about the lateral or X direction across the optical axis AX. In this optical unit 100, i.e., the off-axis optical system OS, the optical axis AX is bent such that it extends along the off-axis surface (the surface parallel to the YZ plane) corresponding to the paper surface, and optical elements 21, 22, 23, and 25 are arranged along this off-axis surface. When viewed in a cross-section parallel to the YZ plane, the optical axis AX is arranged in a Z-shape by multiple optical axis portions AX1, AX2, and AX3 that are tilted back and forth on the reflecting surface. That is, in the off-axis plane parallel to the YZ plane, the light path P1 from the projection lens 21 to the inner reflecting surface 22b, the light path P2 from the inner reflecting surface 22b to the lens 25, and the light path P3 from the lens 25 to the pupil position PP are arranged in a Z-shaped, two-stage folding configuration. The off-axis plane (the plane parallel to the YZ plane) which serves as the reference plane extends parallel to the longitudinal Y direction. In this case, the optical elements 21, 22, 23, and 25 constituting the first display device 100a are arranged by changing their height positions in the longitudinal direction.

[0059] The projection lens 21 is made of resin, but it can also be made of glass. In the projection lens 21, the optical surfaces 21a, 21b, 21c, and 21d are, for example, freeform surfaces, but they can also be aspherical surfaces.

[0060] Prism reflector 22 refracts and reflects the image light ML from projection lens 21. Prism reflector 22 is made of resin, but can also be made of glass. The refractive index of the main body of prism reflector 22 is set to a value that also references the reflection angle of the image light ML to achieve total internal reflection at the inner surface. In prism reflector 22, optical surfaces 22a, 22b, and 22c are, for example, freeform surfaces, but can also be aspherical.

[0061] The wedge-shaped optical element 23 is disposed between the prism reflector 22 and the lens 25, and serves to improve the imaging state. The wedge-shaped optical element 23 is formed of resin, but it can also be made of glass. In the wedge-shaped optical element 23, the optical surfaces 23a and 23b are, for example, freeform surfaces, but they can also be aspherical surfaces.

[0062] The lens 25 is a plate-shaped optical component that is convex in shape and functions as a concave mirror, reflecting the image light ML from the first optical system 20a toward the pupil position PP. The lens 25 is a reflective plate with the following structure: a light-transmitting reflective film 25c is formed on the front or back surface of a resin or glass plate 25b.

[0063] The optical path is described as follows: Image light ML from the first image element 41a is incident on the projection lens 21 and exits from the projection lens 21 in a substantially collimated state. The image light ML passing through the projection lens 21 is incident on the prism reflector 22, refracted, and passes through the incident surface 22a. It is then reflected by the inner reflecting surface 22b with a high reflectivity of nearly 100%, and refracted again at the exit surface 22c. The image light ML from the prism reflector 22 is incident on the lens 25 via the wedge-shaped optical element 23 and reflected by the reflecting surface 25a with a reflectivity of approximately 50% or less. The image light ML reflected by the lens 25 is incident on the wearer US's eye EY or the pupil position PP. External light OL passing through the lens 25 or the surrounding support plate 83 is also incident on the pupil position PP. In other words, the wearer US wearing the first display device 100a can observe a virtual image based on the image light ML by superimposing it with an external image.

[0064] The following is about the composition Figure 10 The positioning and fixing of elements such as the prism reflector 22, wedge optical element 23, and projection lens 21 in the first optical system 20a or optical block OB will be explained.

[0065] Figure 12 This diagram illustrates the method of fixing the prism reflector 22 and the wedge-shaped optical element 23 via the lens tube 31. Figure 12 In the diagram, region ER1 is a side view of the optical block body 30 integrated through the lens barrel 31, and region ER2 is a top view of the optical block body 30. Furthermore, the optical block in the optical block OB, which integrates the prism mirror 22 and the wedge-shaped optical element 23 using the lens barrel 31, is referred to as the optical block body 30.

[0066] The prism reflector 22 is fixed relative to the mirror barrel 31 in a position achieved by fitting and offset. Specifically, the upper surfaces of a pair of fitting portions 31y formed on the upper part 31a of the mirror barrel 31 and the inner surface of the limiting plate 31z abut against the lower surface of the flange portion 22f of the prism reflector 22, supporting the prism reflector 22 on the fitting portions 31y in an inclined state, and clamping the stepped side surface 22g of the flange portion 22f between the fitting portions 31y and the inner surface of the fitting portions 31y. Thus, the arrangement and rotational posture of the prism reflector 22 relative to the mirror barrel 31 in the three-axis directions (X, Y, and Z directions) are positioned. The bonding of the prism reflector 22 to the mirror barrel 31 can be achieved using photocurable adhesives, ultrasonic welding, etc.

[0067] The wedge-shaped optical element 23 is fixed to the lens barrel 31 in a fitted and positioned state. Specifically, the inner surface and lower end face of the fitting portion 31x corresponding to the four sides of the lower part 31b of the lens barrel 31 are fitted with the stepped side surface 23g and stepped upper surface 23h of the flange portion 23f of the wedge-shaped optical element 23. Thus, the arrangement and rotational posture of the wedge-shaped optical element 23 relative to the lens barrel 31 in the three-axis direction are positioned. The bonding of the wedge-shaped optical element 23 to the lens barrel 31 can be achieved using photocurable adhesives, ultrasonic welding, etc.

[0068] Reference Figure 13 The fixing of the projection lens 21 relative to the optical block body 30 will be explained. Figure 13 In the diagram, region FR1 is a three-dimensional view of the optical block body 30, and region FR2 is a three-dimensional view of the optical block body 30 and the projection lens 21.

[0069] The projection lens 21 is directly fixed to the prism reflector 22 of the optical block body 30. At this time, the projection lens 21 is fixed relative to the prism reflector 22 in a position achieved by engagement and offset. Specifically, a pair of claws 21y (only one shown) formed on the flange 21f of the second lens 21q constituting the projection lens 21 are inserted into a pair of recesses 22s formed on the flange 22f of the prism reflector 22. Thus, the pair of claws 21y of the second lens 21q holds the flange 22f of the prism reflector 22. At this time, the pair of claws 21y engages with the pair of recesses 22s, and offset is performed so that the reference surfaces provided on both sides abut against each other. Thus, the arrangement and rotational posture of the second lens 21q, i.e., the projection lens 21, relative to the prism reflector 22 about the three axes are positioned. The bonding of the second lens 21q and the prism reflector 22 can be achieved using photocurable adhesives, ultrasonic welding, etc.

[0070] In the projection lens 21, the first lens 21p is directly fixed to the second lens 21q. At this time, the first lens 21p is fixed relative to the second lens 21q in a position achieved by engagement. Specifically, two sets of claws 21t (only one set shown) formed on the flange portion 21n of the first lens 21p are inserted into a pair of recesses 21s (only one shown) formed on the flange portion 21f of the second lens 21q. Thus, the multiple claws 21t of the first lens 21p hold the flange portion 21f of the second lens 21q. At this time, the two sets of claws 21t engage with the pair of recesses 21s. Thus, the configuration and rotational posture of the first lens 21p relative to the second lens 21q about the three axes are positioned. The bonding of the first lens 21p and the second lens 21q can be achieved using photocurable adhesives, ultrasonic welding, etc.

[0071] For the first lens 21p of the projection lens 21, the first holder 72a supporting the first image element 41a is directly fixed using a pair of recesses 21r formed on the flange portion 21n of the first lens 21p, in the same way as fixing the first lens 21p relative to the second lens 21q (see reference). Figure 10 ).

[0072] As described above, the prism reflector 22 and projection lens 21 constituting the optical block OB are directly fixed together by a mutually positioning structure, without the inclusion of shared components such as a frame or housing. Therefore, it is possible to improve the necessary assembly accuracy between components (specifically, between the prism reflector 22 and the projection lens 21) while miniaturizing the optical block OB.

[0073] Although the description is omitted, the first lens 21p and the second lens 21q, which constitute the projection lens 21, also have wedge-shaped optical elements 23, i.e. Figure 1 The optical component 10 shown also has a measurement reference component corresponding to the measurement reference components 16 and 17. Through this measurement reference component, for the first lens 21p, the three-dimensional shapes of the incident surface 21a and the exit surface 21b can be determined based on design references, and their relative arrangement can be determined, thereby enabling a comprehensive evaluation of the optical performance of the first lens 21p. Similarly, for the second lens 21q, the three-dimensional shapes of the incident surface 21c and the exit surface 21d can be determined based on design references, and their relative arrangement can be determined, thereby enabling a comprehensive evaluation of the optical performance of the second lens 21q.

[0074] For the lens 25, its optical performance can be evaluated using only the reflecting surface 25a, but it can also be evaluated in conjunction with the outer surface 25o. In this case, the lens 25 is also... Figure 1 The optical component 10 shown in the figure also forms a measurement reference component equivalent to the measurement reference components 16 and 17, which can measure the three-dimensional shape of the reflecting surface 25a and the outer surface 25o to determine their relative configuration relationship.

[0075] Regarding the relative configuration of the projection lens 21, prism reflector 22, wedge optical element 23, and perspective lens 25, the relative configuration relationship can be measured and evaluated using a measurement reference component provided on each optical element 21, 22, 23, and 25. However, it is not limited to this; the relative configuration relationship of each optical element 21, 22, 23, and 25 can be measured using a separate measurement reference component provided on each optical element 21, 22, 23, and 25 for determining the relative configuration.

[0076] The optical components 10 and 210 of the embodiments described above have multiple optically effective surfaces 11a, 11b, and 11c, and are accompanied by multiple measurement reference components 16 and 17, each with a reference related to the configuration of the multiple optically effective surfaces 11a, 11b, and 11c. In this case, the multiple measurement reference components 16 and 17 accompanying the multiple optically effective surfaces 11a, 11b, and 11c are each given a reference related to the configuration of the multiple optically effective surfaces 11a, 11b, and 11c, thus the relative positional relationship of the optically effective surfaces 11a, 11b, and 11c can be determined. As a result, the optical performance of the optical components 10 and 210 can be accurately evaluated, and the optical performance of the optical unit 100 assembled with the optical components 10 and 210 can be maintained while achieving miniaturization and weight reduction.

[0077] [Other variations]

[0078] The present invention has been described above according to the embodiments, but the present invention is not limited to the above embodiments. It can be implemented in various ways without departing from its spirit, and for example, the following modifications can also be made.

[0079] The outline shape of optical components 10 and 210, and the shape of optical effective surfaces 11a, 11b, and 11c are not limited to the shapes shown in the figures, and can be appropriately changed according to the application. The shapes of measuring reference components 16 and 17 are not limited to triangular pyramids, and can be set to various shapes including planes and edges.

[0080] The optical unit 100 assembled in the first display device 100a is not limited to the structure shown in the figure, and can be configured in various ways. For example, regarding the optical elements constituting the optical unit 100, Figure 11 The examples shown are merely illustrations; changes such as increasing or decreasing the number of lenses, adding mirrors, or adding light guide components can be made.

[0081] On the external side of the combiners 103a and 103b, a dimming device can be installed to dim the light transmitted through the combiners 103a and 103b. The dimming device can, for example, electrically adjust the transmittance. As the dimming device, a mirrored liquid crystal or an electronic light shield can be used. The dimming device can also adjust the transmittance according to the external illuminance.

[0082] Combiners 103a and 103b can also be replaced with light-shielding mirrors. In this case, it becomes a non-perspective optical system that does not rely on direct observation of external images.

[0083] In a specific embodiment, the optical component has multiple optically effective surfaces, and is accompanied by multiple measurement reference components, each having a reference given to a configuration related to the multiple optically effective surfaces.

[0084] In the aforementioned optical components, multiple measurement reference components attached to multiple optically effective surfaces provide references related to the configuration of the multiple optically effective surfaces, thus enabling the determination of the relative positional relationships of the optically effective surfaces. Therefore, the optical performance of the optical components can be accurately evaluated, and for optical units assembled with these components, their optical performance can be maintained while achieving miniaturization and weight reduction.

[0085] In a specific aspect, the plurality of measurement reference components includes a first measurement reference component and a second measurement reference component. The first measurement reference component includes an overall reference shape corresponding to a design reference, and the second measurement reference component includes a measurement reference shape different from the overall reference shape. In this case, by attaching an optically effective surface that is far from the design reference to form the measurement reference shape on the other measurement reference component, it is possible to correlate the optically effective surface that is close to the design reference with the optically effective surface that is far from the design reference in measurement.

[0086] In a specific context, the overall datum shape comprises any shape among multiple planes and the lines of intersection of these planes. In this case, the design datum is determined as coordinate information through multiple planes or the lines of intersection of these planes.

[0087] In a specific context, the measurement datum shape comprises any shape among multiple planes and the lines of intersection of these planes. In this case, additional datums beyond the design datum are determined as coordinate information through multiple planes or the lines of intersection of these planes.

[0088] In a specific aspect, the measuring reference component is formed in a frame disposed outside the optically effective surface. In this case, the frame outside the optically effective surface can be effectively and flexibly used for measuring relative configuration relationships.

[0089] In a specific aspect, the measuring reference component is arranged near the optically effective surfaces in a manner that extends continuously from multiple optically effective surfaces. In this case, the measuring reference component and the optically effective surfaces can be measured together, thereby improving the measurement accuracy of the measuring reference component.

[0090] In a specific aspect, the measuring reference component is a protruding part formed on the frame. In this case, a reference surface and reference line can be formed in the shape of the protrusion, which makes the measurement of the measuring device easier.

[0091] In specific instances, the optically effective surfaces form an angle of 90° or more with each other. In this case, a pair of optically effective surfaces among multiple optically effective surfaces are separated from each other, making it difficult to measure the surface accuracy together using a measuring device. However, the relative configuration relationship can be determined by measuring a reference component.

[0092] In a specific aspect, the measurement reference component is a shared measurement component used by all optical effective surfaces. Even if a pair of optical effective surfaces are separated from each other, a shared measurement component can be set for these optical effective surfaces. In this case, by sharing the measurement component, space can be saved in forming the shared measurement component.

[0093] The virtual image display device in a specific manner includes: an image element that emits image light; and an optical unit that includes the aforementioned optical components and images the image light incident from the image element into a virtual image.

[0094] In the aforementioned virtual image display device, the optical unit, which is equipped with optical components, can achieve miniaturization and weight reduction while maintaining optical performance.

[0095] The specific method for measuring optical components is a method for measuring optical components with multiple optical effective surfaces. In this method, the optical component is accompanied by multiple optical effective surfaces and has multiple measurement reference components, each of which is given a reference related to the configuration of the multiple optical effective surfaces. The multiple measurement reference components accompanied by the multiple optical effective surfaces are measured together with the multiple optical effective surfaces. The multiple measurement reference components are measured separately, thereby determining the relative configuration relationship of the multiple optical effective surfaces.

[0096] In the above measurement method, multiple measurement reference components attached to multiple optical effective surfaces are measured together with the multiple optical effective surfaces, and the multiple measurement reference components are measured separately. Therefore, the relative positional relationship of the optical effective surfaces can be determined while measuring their shape. As a result, the optical performance of optical components can be accurately evaluated, and for imaging optical systems assembled with optical components, miniaturization and weight reduction can be achieved while maintaining their optical performance.

Claims

1. An optical component for use as a wedge-shaped optical element in a virtual image display device of a head-worn display device, wherein, The optical component has a body with a circular outline and a rectangular frame surrounding the outer periphery of the body. The body has a first optically effective surface and a second optically effective surface. The optical component is accompanied by a first measurement reference component with respect to the configuration of the first optically effective surface, and by a second measurement reference component with respect to the configuration of the second optically effective surface. On the frame, a protrusion is formed to surround the first optically effective surface. The protrusion has: a first surface that extends continuously with the first optically effective surface in a manner that decreases in the step difference between it and the outer edge of the first optically effective surface; and a second surface that extends continuously with the second optically effective surface in a manner that decreases in the step difference between it and the outer edge of the second optically effective surface. The first measuring reference component is part of the protrusion, and the second measuring reference component is the protruding part on the second optical effective surface side of the frame.

2. An optical component used as a prism reflector in a virtual image display device of a head-worn display device, wherein, The optical component has a main body with a triangular prism profile and frames disposed at both ends of the main body. The main body has a first optically effective surface, a second optically effective surface, and a third optically effective surface. The optical component is accompanied by a first measurement reference component, which provides a reference related to the configuration of the first and third optically effective surfaces, and by a second measurement reference component, which provides a reference related to the configuration of the second optically effective surface. On the frame, a protrusion is formed such that it sandwiches the first and third optically effective surfaces from the periphery. The protrusion has: a first surface that extends continuously with the first and third optically effective surfaces in a manner that reduces the step difference between them and their outer edges; and a second surface that extends continuously with the second optically effective surface in a manner that reduces the step difference between it and its outer edge. The first measuring reference component is part of the protrusion, and the second measuring reference component is the protruding part on the second optical effective surface side of the frame.

3. The optical component according to claim 1 or 2, wherein, The first measurement reference component includes an overall reference shape corresponding to the design reference, and the second measurement reference component includes a measurement reference shape that is different from the overall reference shape.

4. The optical component according to claim 3, wherein, The overall reference shape includes multiple planes and any shape among the lines of intersection of the multiple planes.

5. The optical component according to claim 3, wherein, The measurement reference shape includes any shape among multiple planes and the lines of intersection of the multiple planes.

6. The optical component according to claim 1 or 2, wherein, The measuring reference component is disposed near the optically effective surface in a manner that extends continuously from the optically effective surface.

7. The optical component according to claim 1 or 2, wherein, The optical effective surfaces form an angle of more than 90° with each other.

8. The optical component according to claim 2, wherein, The first measurement reference component is a shared measurement component shared by the optical effective surface.

9. A virtual image display device, which is a head-mounted display device, wherein, The virtual image display device has the following features: Imaging elements that emit image light; and An optical unit comprising the optical components of any one of claims 1 to 8, which images the image light incident from the image element into a virtual image.

10. A method for measuring an optical component, said optical component being used as a wedge-shaped optical element in a virtual image display device of a head-worn display device, having a body with a circular outline and a rectangular frame surrounding the outer periphery of said body, said body having a first optically effective surface and a second optically effective surface, wherein, The optical component is equipped with a first measurement reference component that has a reference related to the configuration of the first effective optical surface, and with a second measurement reference component that has a reference related to the configuration of the second effective optical surface, along with the first effective optical surface. On the frame, a protrusion is formed to surround the first optically effective surface. The protrusion has: a first surface that extends continuously with the first optically effective surface in a manner that decreases in the step difference between it and the outer edge of the first optically effective surface; and a second surface that extends continuously with the second optically effective surface in a manner that decreases in the step difference between it and the outer edge of the second optically effective surface. The first measuring reference component is part of the protrusion, and the second measuring reference component is the protruding portion on the second optical effective surface side of the frame. The first measurement reference component attached to the first optical effective surface is measured together with the first optical effective surface; the second measurement reference component attached to the second optical effective surface is measured together with the second optical effective surface. The first measuring reference component and the second measuring reference component are measured separately to determine the relative configuration of the first optical effective surface and the second optical effective surface.

11. A method for measuring an optical component, said optical component being used as a prism reflector in a virtual image display device of a head-worn display device, having a main body with a triangular prism profile and frames disposed at both ends of said main body, said main body having a first optically effective surface, a second optically effective surface and a third optically effective surface, wherein, The optical component is equipped with a first measurement reference component, which, along with the first and third optical effective surfaces, has a reference given to the configuration of the first and third optical effective surfaces, and a second measurement reference component, along with the second optical effective surface, has a reference given to the configuration of the second optical effective surface. On the frame, a protrusion is formed such that it sandwiches the first and third optically effective surfaces from the periphery. The protrusion has: a first surface that extends continuously with the first and third optically effective surfaces in a manner that reduces the step difference between them and their outer edges; and a second surface that extends continuously with the second optically effective surface in a manner that reduces the step difference between it and its outer edge. The first measuring reference component is part of the protrusion, and the second measuring reference component is the protruding portion on the second optical effective surface side of the frame. The first measurement reference component attached to the first and third optical effective surfaces is measured together with the first and third optical effective surfaces; the second measurement reference component attached to the second optical effective surface is measured together with the second optical effective surface. The first measuring reference component and the second measuring reference component are measured separately to determine the relative configuration relationship between the first optical effective surface, the second optical effective surface and the third optical effective surface.

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