[논문]Novel Telecentric Collimator Design for Mobile Optical Inspection Instruments

Hojong Choi; Seongil Cho; Jaemyung Ryu

doi:10.3807/copp.2023.7.3.263

Novel Telecentric Collimator Design for Mobile Optical Inspection Instruments 원문보기

Current optics and photonics, v.7 no.3, 2023년, pp.263 - 272

Hojong Choi (Department of Electronic Engineering, Gachon University) , Seongil Cho (Department of Optical Engineering, Kumoh National Institute of Technology) , Jaemyung Ryu (Department of Optical Engineering, Kumoh National Institute of Technology)

Abstract ▼ AI-Helper

A collimator refers to an optical system that images a collimated beam at a desired point. A resolution target located at a near distance can be converted into a virtual image located at a long distance. To test the resolution for mobile cameras, a large target is placed at a long distance. If a collimator system is used, the target can be placed at a near distance. The space required for a resolution inspection can thus be drastically reduced. However, to inspect a mobile camera, the exit pupil of the collimator system and the entrance pupil of the mobile camera must match, and the stop of the collimator system must be located on the last surface. Because a collimator system cannot be symmetrical with respect to the stop, the distortion becomes extremely large, which can be corrected by combining the collimator symmetrically with respect to the object plane. A novel system was designed to inspect an optical lens on a mobile phone. After arranging the refractive power, lenses were added using the equivalent lens design method. The distortion was reduced to less than 1%. This optical system satisfies a half-field angle of 45° and an optical performance sufficient for inspection.

주제어

표/그림 (12)

그림 FIG. 1. The optical layout and distortion grid of conventional collimator system: (a) Optical layout of conventional collimator and (b) distortion grid for the conventional collimator.
그림 FIG. 2. Paraxial layout in which the telecentric collimator system is arranged symmetrically.
그림 FIG. 3. Paraxial optical layout for telecentric collimator system.
그림 FIG. 4. Optical layout of a collimator composed of a single lens.
그림 FIG. 5. Optical layout of a collimator composed of two lenses.
그림 FIG. 6. Optical layout of a collimator composed of five lenses.
그림 FIG. 7. Optical layout of our designed telecentric collimator system with virtual images displayed.
그림 FIG. 8. Optical layout when the virtual image distance is infinite and 100 mm for the combined collimator system.
그림 FIG. 9. Through focus modulation transfer function (MTF) graph when the telecentric collimator is alone. (a) Through focus MTF plots at infinity, (b) through focus MTF at +100 mm, and (c) through focus MTF at -100 mm.
그림 FIG. 10. Distortion chart of single telecentric collimator.
표 TABLE 1. The distortion of our designed telecentric collimator
그림 FIG. 11. Distortion grid of the combined telecentric collimator. Distortion grid plots at (a) infinity and (b) +100 mm.

참고문헌 (31)

N. Pears, Y. Liu, and P. Bunting, 3D Imaging, Analysis and？Applications (Springer, 2012).
C. Song, Y. Jung, S. Bae, J. Song, and Y. Kim, "Auto detect inspection system for single lens product of mobile phone camera," in Proc. Korean Society of Precision Engineering Spring？Conference (Ramada hotel, Jeju island, Korea. Jun. 23-24.？2005), pp. 432-435.
D. H. Moon, S. G. Baek, B. L. Zhang, J. Y. Jung, Y. K. Kim,？and J. Y. Song, "Application of virtual manufacturing in developing manufacturing system for the lens module of phone-camera," IFAC Proc. 39, 95-100 (2006).
K. W. Ko, D. H. Kim, M. Y. Kim, and J. H. Kim, "An automatic optical inspection system for inspection of CMOS compact camera module assembly," Int. J. Precis. Eng. Manuf. 10,？67-72 (2009).
Y.-H. Chen, Y.-F. Hsieh, C.-W. Hsu, M. Ou-Yang, L. Cheng-Chung, C.-H. Hwang, and T.-S. Liao, "An image based optical？lens eccentric error inspection system," in Proc. 2012 IEEE？International Instrumentation and Measurement Technology？Conference Proceedings (Graz, Austria, May 13-16. 2012),？pp. 1094-1097.
H.-S. Kim, K.-J. Lee, D.-Y. Jung, Y.-H. Lee, J.-H. Park, and？G.-S. Kim, "Design for a defective product inspection device？for the curved glass used in Smart-phones," J. Inst. Contr. Robot. Syst. 21, 794-800 (2015).
J. Torng, K. K. Maung, and K.-C. Fan, "Development of an？automated optical inspection system for mobile phone panels,"？J. Chin. Soc. Mech. Eng. 34, 103-108 (2013).
F. L. Pedrotti, and L. S. Pedrotti, Introduction to Optics, 2nd ed.？(Prentice-Hall, 1993).
F. Twyman, Prism and Lens Making: A Textbook for Optical？Glassworkers (Routledge, UK, 1988).
P. Mouroulis, and J. Macdonald, Geometrical Optics and Optical Design, 1st ed. (Oxford University Press, USA, 1997).
C. Velzel, A Course in Lens Design (Springer, Netherlands,？2014).
G. H. Smith, Practical Computer-Aided Lens Design (Willmann-Bell, USA, 1998).
W. J. Smith, Modern Lens Design, 2nd ed. (McGraw-Hill,？USA, 2004).
A. D. Clark, and W. Wright, Zoom Lenses (Monographs on？Applied Optics Series no. 7), (Hilger, UK, 1973).
K. M. Kim, S.-H. Choe, J.-M. Ryu, and H. Choi, "Computation？of analytical zoom locus using pade approximation," Mathematics 8, 581 (2020).

상세보기
S. Thibault, J. Gauvin, M. Doucet, and M. Wang, "Enhanced？optical design by distortion control," in Optical Design and？Engineering II, L. Mazuray and R. Wartmann, Eds. (SPIE？Press, USA, 2005), p. 596211.
R. Fischer, B. Tadic-Galeb, and P. Yoder, Optical System Design, 2nd ed. (McGraw-Hill, USA, 2008).
K.-E. Peiponen, R. Myllyla, and A. V. Priezzhev, Optical？Measurement Techniques: Innovations for Industry and the？Life Sciences (Springer Series in Optical Sciences), (Springer？Berlin, Germany, 2009).
M. Watanabe and S. K. Nayar, "Telecentric optics for focus？analysis," IEEE Trans. Pattern Anal. Mach. Intel. 19, 1360-1365 (1997).
V. N. Mahajan, Optical Imaging and Aberrations: Part I: Ray？Geometrical Optics (SPIE Press, USA, 1998).
M. Laikin, Lens Design (CRC Press, USA, 2007).
H. Choi, J.-M. Ryu, and S.-W. Choe, "A novel therapeutic？instrument using an ultrasound-light-emitting diode with an？adjustable telephoto lens for suppression of tumor cell proliferation," Measurement 147, 106865 (2019).
J. M. Ryu, J. H. Oh, and J. H. Jo, "Unified analytic calculation？method for zoom loci of zoom lens systems with a finite object distance," J. Opt. Soc. Korea 18, 134-145 (2014).

원문보기 상세보기
R. Kingslake and R. B. Johnson, Lens Design Fundamentals,？2nd ed. (Academic Press, 2010).
H. Choi, J.-Y. Yeom, and J.-M. Ryu, "Development of a multiwavelength visible-range-supported opto-ultrasound instrument using a light-emitting diode and ultrasound transducer,"？Sensors 18, 3324 (2018).

상세보기
H. Zappe, Fundamentals of Micro-optics (Cambridge University Press, UK, 2010).
H. Choi, J.-Y. Jo, and J.-M. Ryu, "A novel focal length measurement method for center-obstructed omni-directional reflective optical systems," Appl. Sci. 9, 2350 (2019).
H. Choi and J. Ryu, "Design of wide angle and large aperture？optical system with inner focus for compact system camera？applications," Appl. Sci. 10, 179 (2020).
S. Ray, Applied Photographic Optics, 3rd ed. (Routledge, USA, 2002).
K. K. Sharma, Optics: Principles and Applications, 1st ed.？(Academic Press, USA, 2006).
B. Prescott and G. McLean, "Line-based correction of radial？lens distortion," Grap. Models Image Process. 59, 39-47？(1997).

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증