Browse > Article
http://dx.doi.org/10.3807/KJOP.2018.29.1.019

Double-Gauss Optical System Design with Fixed Magnification and Image Surface Independent of Object Distance  

Ryu, Jae Myung (Department of Optical Engineering, Kumoh National Institute of Technology)
Ryu, Chang Ho (Department of Optical Engineering, Kumoh National Institute of Technology)
Kim, Kang Min (Department of Optical Engineering, Kumoh National Institute of Technology)
Kim, Byoung Young (ByMtech Co., Ltd.)
Ju, Yun Jae (Department of Photonics and Sensors, Hannam University)
Jo, Jae Heung (Department of Photonics and Sensors, Hannam University)
Publication Information
Korean Journal of Optics and Photonics / v.29, no.1, 2018 , pp. 19-27 More about this Journal
Abstract
A change in object distance would generally change the magnification of an optical system. In this paper, we have proposed and designed a double-Gauss optical system with a fixed magnification and image surface regardless of any change in object distance, according to moving the lens groups a little bit to the front and rear of the stop, independently parallel to the direction of the optical axis. By maintaining a constant size of image formation in spite of various object-distance changes in a projection system such as a head-up display (HUD) or head-mounted display (HMD), we can prevent the field of view from changing while focusing in an HUD or HMD. Also, to check precisely the state of the wiring that connects semiconductor chips and IC circuit boards, we can keep the magnification of the optical system constant, even when the object distance changes due to vertical movement along the optical axis of a testing device. Additionally, if we use this double-Gauss optical system as a vision system in the testing process of lots of electronic boards in a manufacturing system, since we can systematically eliminate additional image processing for visual enhancement of image quality, we can dramatically reduce the testing time for a fast test process. Also, the Gaussian bracket method was used to find the moving distance of each group, to achieve the desired specifications and fix magnification and image surface simultaneously. After the initial design, the optimization of the optical system was performed using the Synopsys optical design software.
Keywords
Lens design; Multi configuration system; Gaussian braket method; Relay optics;
Citations & Related Records
연도 인용수 순위
  • Reference
1 "Synopsys" is a registered trademark of osdoptics, http://www.osdoptics.com/.
2 K. Yamaji, "Design of Zoom Lenses," in Progress in Optics VI, E. Wolf, ed. (North-Holland, Amsterdam, 1971), Chapter. 4.
3 J. M. Ryu, J. H. Jo, J. H. Jung, Y. S. Chun, and G. M. Kang, "The design of microscopic system using zoom structure with a fixed magnification and the independency on the variation of object distance," Proc. of SPIE 5523, 353 (2004).
4 I. S. Kim. "The Study on Risk of Distracted Driving," 2008 Annual Conference Korean Psychological Association (Korean ed.), 136-137 (2008).
5 J. S. Oh, E. Y. Lee, J. B. Ryu, and W. Y. Lee, "An analysis for main vulnerable situations and human errors of elderly drivers' traffic accidents," J. Trans. Res. (Korean ed.) 22, 57-75 (2015).
6 J. H. Jung, H. J. Jung, and S. S. Lee "Paraxial lens design by using Gaussian bracket and method of adjustment for the focal, back focal and front focal length," New Phys. (Korean Physical Society, Korean ed.) 27, 576-581 (1987).