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KR-20260067048-A - OPTICAL SYSTEM WITH A DIRECT CONTACT ASSEMBLY STRUCTURE BETWEEN LENSES

KR20260067048AKR 20260067048 AKR20260067048 AKR 20260067048AKR-20260067048-A

Abstract

An embodiment of the present invention provides an optical system having a direct contact assembly structure between lenses, comprising a first lens and a second lens disposed on one side of the first lens, wherein at least a portion thereof is in direct contact with the first lens, and the contact surface between the first lens and the second lens comprises a light opening through which light passes and a light blocking portion that blocks light.

Inventors

  • 정미숙

Assignees

  • 한국공학대학교산학협력단

Dates

Publication Date
20260512
Application Date
20241105

Claims (10)

  1. In an optical system having a direct contact assembly structure between lenses, The first lens and, A second lens disposed on one side of the first lens, wherein at least a portion thereof is in direct contact with the first lens, and comprising: An optical system having a direct contact assembly structure between lenses, characterized in that the contact surface between the first lens and the second lens comprises a light opening through which light passes and a light blocking portion that blocks light.
  2. In paragraph 1, An optical system having a direct contact assembly structure between lenses, characterized in that the first lens and the second lens have a structure in which they come into contact with each other as the outer diameter size of the first lens or the second lens is adjusted and injected.
  3. In paragraph 1, It has an edge portion integrally formed on the edge of the first lens or the second lens, and An optical system having a direct contact assembly structure between lenses, characterized in that the first lens and the second lens come into mutual contact through an edge portion integrally provided on the first lens or the second lens.
  4. In paragraph 3, The above edge portion is, It is formed with a thickness greater than the thickness of the first or second lens without a curved structure, thereby contacting an adjacent lens, and An optical system having a direct contact assembly structure between lenses, characterized in that the first lens or the second lens provided on the inner side of the edge portion does not come into contact with the adjacent lens.
  5. In paragraph 1, The above light blocking unit is, An optical system having a direct contact assembly structure between lenses, characterized by being formed around the optical aperture through black printing processing or processing using a thin film.
  6. In paragraph 1, The first lens or the second lens is, An optical system having a direct contact assembly structure between lenses, characterized by lenses made of plastic material.
  7. In paragraph 1, An optical system having a direct contact assembly structure between lenses, characterized in that an air circulation groove is formed in the area where the first lens and the second lens come into contact among the contact surfaces to provide an air passage.
  8. In Paragraph 7, The above air circulation groove is An optical system having a direct contact assembly structure between lenses, characterized by being formed in a plurality of symmetrical regions among the regions where the first lens and the second lens come into contact.
  9. In paragraph 1, The first lens above is a spherical lens made of glass material, and An optical system having a direct contact assembly structure between lenses, characterized in that the second lens is an aspherical lens made of plastic material.
  10. In paragraph 1, The above optical system is an optical system having a direct contact assembly structure between lenses, characterized in that it is an optical system used in a micro-camera mounted on an endoscope or a mobile terminal.

Description

Optical system with a direct contact assembly structure between lenses The present invention relates to an optical system, and more specifically, to an optical system having a direct contact assembly structure between lenses. Recently, ultra-small camera optical systems used in small electronic devices, such as endoscopes and mobile terminals, require designs that occupy minimal space while providing high-resolution images. To achieve this, an optical design that focuses and regulates light by arranging multiple lenses is essential, and the placement and assembly precision of each lens have a significant impact on the performance and image quality of the optical system. Conventionally, mechanical spacers have been used to maintain spacing between lenses and ensure assembly accuracy. However, these spacers increase the volume of the optical system and have imposed limitations on realizing ultra-miniature structures. Particularly in optical systems where small lenses are placed close together, the air enclosed between the lenses can undergo thermal expansion, causing internal pressure changes. This can lead to image distortion or changes in lens position, thereby degrading system performance. In addition, to generate high-resolution images, the optical system requires a physical aperture stop that acts as an aperture. Previously, this function was implemented using a separate mechanism, but this increased the size and weight of the optical system, posing limitations to the design of ultra-compact optical systems. FIG. 1 is a diagram showing the configuration and structure of a conventional small optical system. FIG. 2 is a schematic diagram illustrating the configuration of an optical system having a direct contact assembly structure between lenses according to one embodiment of the present invention. FIG. 3 is a diagram showing the path of light passing through each lens in an optical system having a direct contact assembly structure between lenses according to FIG. 2. FIG. 4 is a drawing illustrating an air circulation groove formed in a lens according to one embodiment of the present invention. The present invention will be described below with reference to the attached drawings. However, the present invention may be implemented in various different forms and is therefore not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification have been given similar reference numerals. Throughout the specification, when it is stated that a part is "connected (connected, in contact, combined)" with another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly connected" with other members interposed between them. Furthermore, when it is stated that a part "includes" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but rather allows for the inclusion of additional components. The terms used herein are merely for describing specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to indicate the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. FIG. 1 is a diagram showing the configuration and structure of a conventional small optical system. Plastic lenses are widely used in small optical systems, such as portable terminals and endoscope lenses, and these optical systems are becoming increasingly smaller. Generally, optical systems consist of lenses and mechanical components, and have typically been constructed by assembling lenses and spacers. However, as optical systems become smaller, the required size and thickness of spacers have become increasingly smaller, which increases the difficulty of manufacturing and raises production costs. The optical system of the present invention described below can mitigate thermal expansion problems while implementing a direct contact assembly structure by minimizing the gap between lenses without the spacers constituting such conventional optical systems. The optical system of the present invention may be an optical system used in a micro-camera mounted on an endoscope or a portable terminal. Embodiments of the present invention will be described in detail below with reference to the attached drawings. In the claims, the first lens and the second lens may have the same or different configuration as the first lens and the second lens in the description below with reference to F