박재형 교수의 논문은 OSA Optics InfoBase 이번주의 이미지로 올랐고, 김주환 박사는 자신이 공동저자로 참여한 논문이 무지 많이 다운로드 되고 있다고 알려왔다.

열심히들 하길....

아래는 내가 오늘 OSA 홀로그래피 및 회절광학 테크니컬 그룹 멤버들에게 보낸 이메일 메시지.

이거 만드는데, 최희진 교수와 우리 학생들이 수고해 주었다.

보내자마자 몇 사람이 내용이 좋다고 답신을 해 왔다.

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Dear Holography and Diffractive Optics Technical Group Members of OSA,

You are receiving this message because you selected “Holography and Diffractive Optics Technical Group” as one of your technical groups, as part of joining OSA or renewing your OSA membership.

As I told you last time, as the chair of this Technical Group, I would like to send you email messages from time to time with some information to share.

This time, let me share the following information:

(1) Vice-chair of our technical group

(2) Technical Group Meeting at FiO

(3) Chair’s comments on 3D display

(4) Chair’s selection of several papers of interest

(1) Vice-chair of our technical group

Prof. Andrew Forbes (CSIR - National Laser Centre, South Africa) was elected as vice-chair of the Holography and Diffractive Optics Technical Group by the Division Leadership.

Andrew Forbes received his PhD (1998) from the University of Natal, and subsequently spent several years working as an applied laser physicist, first for the South African Atomic Energy Corporation and then later in a private laser company where he was Technical Director. He is presently Chief Researcher at the CSIR National Laser Centre in South Africa, a member of the CSIR’s Strategic Research Panel, and is the Research Group Leader for Mathematical Optics and Advanced Photonic Materials. Andrew sits on several international conference committees and is Chair of two, and is an active reviewers for all the major optics journals. He is a member of the South African Institute of Physics Council and holds honorary positions at the University of Stellenbosch and the University of Kwazulu-Natal. His interests include laser beam shaping with diffractive optics, digital holography, orbital angular momentum states of light, and novel laser resonators.

(2) Technical Group Meeting at FiO

Holography and Diffractive Optics Technical Group meeting will be held on October 16 (Sun) at FiO.

Although I am not able to attend this meeting because of my another duty in my country, our vice-chair will chair the meeting. And we will have Prof. Partha Banerjee as a guest speaker.

If you are attending FiO in San Jose, CA in October, please join the meeting.

Sunday, 16 October, 20:00 – 20:30, Crystal Room, Fairmont Hotel (The exact time and room may change at last moment. So, please refer to the final program of FiO.)

Guest Speaker: Prof. Partha Banerjee (Univ. of Dayton, United States) will give a short speech, sharing his vision on digital holography

Chaired by Andrew Forbes, Group Vice-Chair, this meeting will also provide an opportunity to discuss issues pertinent to the technical group and identify potential areas for growth and volunteer involvement. Leadership of Fabrication, Design and Instrumentation Division of OSA will also attend our meeting.

(3) Chair’s comments on 3D display

3D TVs are commercialized by some major display companies. This is a big opportunity to the researchers in 3D field but also, it gives a crisis as well. That is because the image quality of non-glasses type 3D displays is not as good as that of the commercialized glasses-type systems. Let me add some comments about the commercialized 3D TVs.

The steresoscopic 3D technique is a method to induce the binocular disparity with the special 3D glasses by preparing different left-eye and right-eye images and showing them to the corresponding eyes. Based on the know-hows in flat panel display manufacturing, two display manufacturers are now on top positions in market share of 3D TVs. The interesting point is that the two companies adopt different stereoscopic 3D techniques in their 3D TV products. The active 3D technology uses a 240Hz liquid crystal display panel and liquid crystal (LC) shutter glasses, while the passive 3D technology needs a film patterned retarder (FPR) and polarization glasses. The active 3D technology arranges the left-eye and the right-eye images in different image frames and the operation (open/close) of LC shutter glasses is synchronized with the displayed images. Therefore, the 3D images have a full resolution but the luminance of them is reduced due to the operation of display panel and LC shutter glasses. On the other hand, the passive 3D technology merges the left-eye and right-eye images in one frame by reducing the number of vertical lines of each image into half, and the FPR makes them have orthogonal polarizations to be separated into observer’s each eye by the polarization glasses. As a result, the luminance of the 3D image is relatively high but the images observed by each eye have half vertical resolution. However, the manufacturer of the system is claiming that the 3D resolution of FPR 3D TV is not reduced since the 3D image felt by observer is a composition of the left-eye and right-eye images and several institutes have certified that theory, whereas some other companies or researchers do not agree. Although the details of the two techniques are quite different, both types of 3D TVs can show high 3D quality with practical price and are expected to be a stepping stone between the 2D TV and autostereoscopic (without glasses) 3D TV.

(4) Chair’s selection of several papers of interest

Did you know that the following paper has been on the top in the most-downloaded paper list for almost two years?

“Review of three-dimensional holographic imaging by multiple-viewpoint-projection based methods,” Appl. Opt., vol. 48, no. 34, pp. H120-H136 (2009).

Another interesting paper that was featured by the Spotlight on Optics is the following.

“Holographic video at 40 frames per second for 4-million object points,” Opt. Express, vol. 19, no. 16, pp. 15205-15211 (2011).

In the last two months, I read the following papers with much interest.

“Optimal complex field holographic projection,” Opt. Lett., vol. 36, no. 16, pp. 3073-3075 (2011).

“Thin holographic camera with integrated reference distribution,” Appl. Opt., vol. 50, no. 24, pp. 4848-4854 (2011).

“Zone plate method for electronic holographic display using resolution redistribution technique,” Opt. Express, vol. 19, no. 15, pp. 14707-14719 (2011).

“Trapping and guiding microparticles with morphing autofocusing Airy beams,” Opt. Lett., vol. 36, no. 15, pp. 2883-2885 (2011).

Especially, if you are not familiar with the Airy beams, at first sight you might feel quite strange because Airy beams have properties such as bending (acceleration) in free space and self-healing. Now many groups are working on this interesting beam for further applications for optical trapping and guiding.

This is the end of my message this time.

Have a fun with Holography and Diffractive Optics!

Thank you.

Best wishes,

Byoungho Lee

OSA Holography and Diffractive Optics Technical Group Chair