• Title/Summary/Keyword: hypercentric optics

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Profilometry based on Structured Illumination with Hypercentric Optics (하이퍼센트릭 광학계를 이용한 구조 조명 형상 측정 방법)

  • Kim, Sungmin;Cho, Minguk;Lee, Maengjin;Hahn, Joonku
    • Journal of Institute of Control, Robotics and Systems
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    • v.19 no.12
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    • pp.1089-1093
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    • 2013
  • Depth extraction using the structured illumination method is popularly applied since it has the benefit of measuring the object without contact. With multiple spatial frequencies and phase-shifting techniques, it is possible to extract the depth of objects with large discontinuity. For applications such as 3D (Three Dimensional) displays, 3D information of the object is required and is useful if corresponding to each view of the display. For this purpose, hypercentric optics is appropriate to measure the depth information of an object with a large field of view that is applicable for a 3D display. By experiment, we present the feasibility for phase-shifting profilometry using hypercentric optics to obtain the depth information of an object with the field of view appropriate for a 3D display.

A Study on the Hypercentric Lens Design and Optical Performance Analysis (하이퍼센트릭 렌즈 설계 방법 및 성능 분석에 대한 연구)

  • Koh, Jae Seok;Cho, Hyun Woo;Park, Tae Yang;Kim, Sang Hyun;An, Young Duk;Jung, Mee Suk
    • Korean Journal of Optics and Photonics
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    • v.29 no.1
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    • pp.7-12
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    • 2018
  • In the field of machine vision, a variety of lenses are used to inspect a product for defects. Only part of the appearance of an object can be photographed with a general lens. Optical components such as mirrors, multiple lenses and cameras are required to inspect the entire exterior. This increases the size of the optical system, and has the disadvantage of high cost. In this paper, we design a hypercentric lens, which can photograph the top and side of an object, and various sizes of objects while maintaining the image size. Also, the validity of the design is verified through the performance analysis of the product.