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KR-20260066095-A - Ring-operated lens with a non-circular lens forming machine

KR20260066095AKR 20260066095 AKR20260066095 AKR 20260066095AKR-20260066095-A

Abstract

The present invention relates particularly to a lens (1) comprising a non-circular lens shaper which may be an actuator through a movable structure comprising a plurality of operating points (51, 52, 53) or at least one operating section (51d).

Inventors

  • 파트샤이더, 로만
  • 니데러, 데이비드 안드레아스
  • 래닝, 크리스토퍼

Assignees

  • 옵토투네 스위스 아게

Dates

Publication Date
20260512
Application Date
20240830
Priority Date
20230830

Claims (20)

  1. As a lens (1), - Non-circular lens shaper (2) having an outer diameter (D), - A membrane (3) comprising an optical center (30) to which the optical axis (A) of the lens (1) extends, wherein the membrane (3) further comprises a circumferential edge region (3a) attached to the lens shaper (2), - Base structure (4), - A movable structure (5) configured to move relative to a base structure (4), - Includes a fluid (F) in contact with the membrane (3), The operating structure (5) - A plurality of operating points (51, 52, 53) configured to control the movement of the lens shaper (2) in the direction of the optical axis (A), wherein each operating point (51, 52, 53) is located within a virtual hollow cylinder volume (V) around the optical axis (A), or - At least one operating section (51a; 53b; 51c; 51d) configured to control the movement of the lens shaper (2) in the direction of the optical axis (A), wherein the operating section extends in the circumferential direction of the lens shaper (2) from a first end (500) of the operating section to a second end (501) and is located within a virtual hollow cylindrical volume (V) around the optical axis (A). lens.
  2. In paragraph 1, The operating structure (5) comprises exactly one operating section (51d), and the first and second ends (500, 501) form an angle (α) with the optical center (30) as the vertex, and the angle (α) is in the range of 10 to 350 degrees. lens.
  3. In paragraph 1, The operating structure (5) includes a plurality of operating sections (51a, 52a, 53a; 51c, 52c) configured to control the movement of the lens shaper (2) in the direction of the optical axis (A), each operating section extends in the circumferential direction (U) of the lens shaper (2) from a first end to a second end and is located within a virtual hollow cylindrical volume (V) around the optical axis (A). lens.
  4. In paragraph 1, Multiple operating points (51, 52, 53) divide the lens shaper (2) into corresponding multiple parts (20, 21, 22), lens.
  5. In paragraph 4, At least two of the plurality of parts (20, 21) have different stiffness in the direction of the optical axis (A), lens.
  6. In any one of paragraphs 1 through 5, The movable structure (5) includes a protrusion (61) that protrudes inwardly over the lens shaper (2), the protrusion including one of the plurality of operating points (51, 52, 53) or at least one operating section (51a; 53b; 51c, 51d). lens.
  7. In any one of paragraphs 1 through 6, A plurality of operating points (51, 52, 53) or a plurality of operating sections (51a, 52a, 53a; 51c, 52c) are configured to move collectively with respect to the base structure (4), lens.
  8. In any one of paragraphs 1 through 7, The operating structure (5) is rigid so that the distance between each of two adjacent operating points (51, 52, 53) among the plurality of operating points or between each of two operating sections (51a, 52a, 53a; 51c, 52c) among the plurality of operating sections is maintained constant during the operation of the lens (1). lens.
  9. In any one of paragraphs 1 through 8, A plurality of operating points (51, 52, 53) or a plurality of operating sections (51a, 52a, 53a; 51c, 52c) are configured to move parallel to the optical axis (A), lens.
  10. In any one of paragraphs 1 through 9, The operating structure (5) is designed to be tilted relative to the base structure (4). lens.
  11. In paragraph 4 or 5, Each of the plurality of parts (20, 21, 23) is configured to be freely bent between two adjacent operating points (51, 52, 53) among the plurality of operating points, lens.
  12. In any one of paragraphs 1 through 11, The membrane (3) has a mainly spherical curvature in the operating state of the lens (1), lens.
  13. In any one of paragraphs 1 through 12, To deform the membrane (3), the lens (1) comprises one of a shape memory alloy actuator (7), a DC motor, and a piezo actuator. lens.
  14. In Paragraph 13, The shape memory alloy actuator (7) comprises a wire (70) having a diameter of 5 to 500 μm, preferably 25 to 100 μm, lens.
  15. In any one of paragraphs 1 through 14, The lens (1) includes a locking mechanism (8) for fixing the movable structure (5) to the base structure (4). lens.
  16. As a lens, - Non-circular lens shaper (2), - A membrane (3) comprising an optical center (30) to which the optical axis (A) of the lens (1) extends, wherein the membrane (3) further comprises an edge region (3a) attached to the lens shaper (2), - Base structure (4), - A movable structure (5) configured to move relative to a base structure (4), - Includes a fluid (F) in contact with the membrane (3), The movable structure (5) includes a plurality of sections (51a, 52a, 53a; 51c, 52c) configured to act on the lens shaper (2), each section (51a, 52a, 53a; 51c, 52c) being intersected by a virtual lateral cylindrical surface (V') extending around the optical axis (A). lens.
  17. In Paragraph 16, A plurality of sections (51a, 52a, 53a; 51c, 52c) divide the lens shaper (2) into corresponding plurality of parts (20, 21, 22), lens.
  18. In Paragraph 17, At least two of the plurality of parts (20, 21) have different stiffness in the direction of the optical axis (A), lens.
  19. In any one of paragraphs 16 through 16, The movable structure (5) includes a protrusion (61) that protrudes inwardly over the lens shaper (2), and the protrusion includes one section of the plurality of sections (51a, 52a, 53a; 51c, 52c). lens.
  20. In any one of paragraphs 16 through 19, A plurality of sections (51a, 52a, 53a; 51c, 52c) are configured to move collectively with respect to the base structure (4) or to collectively fix the lens shaper (2) with respect to the base structure (4) in each section, lens.

Description

Ring-operated lens with a non-circular lens forming machine The present invention relates to a lens. Adjustable lenses for head-mounted wearable devices, such as glasses or AR/VR systems, are often desirable to have non-circular contours. This may be due to aesthetics, mass, interference with the nose, or other reasons. US 2017/146700 A1 discloses a deformable membrane assembly comprising a fixed support and a fluid-filled sheath, one wall of which is formed of an elastic membrane that is held under tension around the support by a flexible membrane support member, and the support member is coupled to the fixed support by a plurality of individual control points around the support member by a coupling member to control the position of the membrane edge. Additionally, the assembly includes at least one pressure regulator operable to adjust the shape of the elastic membrane to change the optical power of the optical surface by adjusting the fluid pressure inside the sheath. Additionally, the plurality of individual control points include at least three hinge points, and the membrane support member is hinge-connected to the support at a fixed position to prevent displacement of the support member on the z-axis with respect to the support at each hinge point, and the hinge points are positioned at spaced positions around the membrane edge that are substantially equidistant from the optical center of the elastic membrane. Based on the above, the problem to be solved by the present invention is to provide a lens having a non-circular lens shaper/contour that can be operated efficiently in a simple manner. This problem is solved by a lens having the features of claims 1, 16, 29, and 41. Preferred embodiments of these aspects of the invention are mentioned in the corresponding dependent claims and are described below. According to claim 1 corresponding to the first aspect of the present invention, a lens is disclosed, and the lens is: - Non-circular lens shaper with outer diameter, - A membrane comprising an optical center to which the optical axis of a lens extends, wherein the membrane further comprises a circumferential edge region attached to a lens shaper, in particular, the edge region extending around the optical center, the membrane - Base structure - A movable structure configured to move relative to a base structure, in particular configured to deform a membrane to adjust the optical power of a lens, - Includes a fluid (e.g., liquid) in contact with the membrane, The operating structure is A plurality (e.g., two or three) preferably spaced-apart operating points configured to control the movement of a lens shaper in the direction of the optical axis, wherein each operating point is located within a virtual hollow cylindrical volume around the optical axis, or * At least one operating section configured to control the movement of the lens shaper in the direction of the optical axis, wherein the operating section extends in the circumferential direction of the lens shaper from a first end of the operating section to a second end and is located within a virtual hollow cylindrical volume around the optical axis. In particular, the outer diameter is the maximum outer diameter extending between two opposing points on the outside of the lens shaper, and these opposing points are furthest apart from each other. The fact that the lens shaper is non-circular means, in particular, that the inner contour/edge of the lens shaper defining the opening of the lens shaper to which the membrane extends is non-circular. The corresponding outer edge/contour of the lens shaper may also be non-circular. This applies to all aspects of the invention described herein. In particular, the non-circular lens shaper includes an inner diameter (relative to the inner edge of the lens shaper) that differs from the inner diameter of the lens shaper at other locations by at least 1%, preferably at least 2%, and more preferably at least 5%. Additionally, the fact that the virtual hollow cylindrical volume is located around the optical axis may mean that the cylindrical axis of this hollow cylindrical volume coincides with the optical axis, but alternatively, the cylindrical axis may include a tilt with respect to the optical axis, and the angle formed by the cylindrical axis and the optical axis is less than 30 degrees, preferably less than 20 degrees, more preferably less than 10 degrees. This may also be applied to other aspects of the present invention. In particular, the operating structure may include two (specifically exactly two), three (specifically exactly three), or more operating points. Additionally, the operating structure may include a single operating section (i.e., exactly one operating section) or a plurality thereof. Advantageously, due to a driving point or at least one driving section on a common diameter (or close to a common diameter), the driving point/section can be connected by a single driving element, for example,