Australian and New Zealand
Optical Society    

The ANZOS holds an annual conference, ANZCOP. Previously the Society hosted three conferences (AOS Congress, ACOFT and ACOLS) and co-sponsors others. AOS News (Vol. 27, No.4) gives an overview of AOS conferences 1977-2012.

Upcoming events

    • 11 May 2021
    • 1:00 PM (UTC+10:00)
    • https://monash.zoom.us/j/82705008748?pwd=MjZKWUQ1OWsxSytaTE4yTFJ2T3JiZz09

    You are invited to our next Imaging and Optical Physics Seminar, to be held on May 11th at 1pm on Zoom. 

    Our two speakers are Joanne Etheridge from the Monash Centre for Electron Microscopy, speaking on "Imaging with symmetry at the picometre scale' and Timur Gureyev from the University of Melbourne, speaking on "Differential Holographic Tomography for atomic-resolution electron imaging". Please find abstracts for their talks below.


    To connect on the day, please click this URL:

    https://monash.zoom.us/j/82705008748?pwd=MjZKWUQ1OWsxSytaTE4yTFJ2T3JiZz09

    Or, open Zoom and enter meeting ID: 827 0500 8748 and passcode: 794464



    Presenter: Joanne Etheridge

    Imaging with symmetry at the picometre scale
    An “image” is a representation of an object, providing information about its form and structure. In many imaging systems, image contrast is generated when the object alters the wavelength, amplitude and/or phase of the probing radiation. In this talk, I will discuss a different approach to image formation where contrast is generated when the object alters the symmetry of the probing radiation. We will consider the case when the probe is a spherical electron wave-field focussed to a point smaller than an atom and is raster-scanned across the object - a scenario that can be executed in a scanning transmission electron microscope. Due to the strength of the Coulomb interaction between the probing electron and the specimen, and the consequent multiple, dynamical scattering, these images are acutely sensitive to changes in specimen symmetry at the picometre scale. This provides a different mechanism for imaging atomic-scale features in condensed matter, particularly where symmetry or symmetry-breaking plays a significant role.


    Presenter: Timur Gureyev

    Differential Holographic Tomography for atomic-resolution electron imaging

    It has been argued that in atomic-resolution transmission electron microscopy (TEM) of sparse weakly scattering structures, such as biological molecules, multiple electron scattering tends to have only a small effect on the defocused images and on the subsequent CT reconstruction from such images. At the same time, at the spatial resolution approaching one angstrom or finer, the role of in-molecule Fresnel diffraction becomes significant due to the intrinsically shallow depth of focus, which leads to non-negligible curvature of the Ewald sphere. This implies that suitable 3D reconstruction methods can be based on the 1st Born or the 1st Rytov approximation to the Fresnel diffraction. One such method, termed here Differential Holographic Tomography, has been recently developed and successfully tested on numerical models of several biological molecules. It has been shown that the method is capable of accurate reconstruction of the locations of atoms in a molecule from TEM images collected at a small number of random orientations of the molecule. Possible applications to cryogenic electron microscopy and other areas will be discussed.
    • 05 Dec 2022
    • (UTC+11:00)
    • 09 Dec 2022
    • (UTC+11:00)

    ANZOS expects to participate again in the AIP Congress in 2022, being the 2020 Congress rescheduled due to the pandemic. The planned dates are 5th to 9th December in Adelaide. For details please see the AIP website.

Past events

09 Mar 2021 Imaging and Optical Physics Seminar - Zoom webinar at 1pm, Tuesday 9/03/21
01 Dec 2020 Imaging and Optical Physics Seminar - Zoom webinar at 12 pm on 1/12/20
06 Oct 2020 Imaging and Optical Physics Seminar - via Zoom
25 Aug 2020 Imaging and Optical Physics Seminar - Zoom webinar at 3 pm on Tuesday, August 25th
02 Aug 2020 CLEO Pacific-Rim 2020
09 Jul 2020 Imaging and Optical Physics Webinar - July 9th
26 May 2020 Imaging and Optical Physics Webinar - May 26th
16 May 2020 International Day of Light 2020
02 Apr 2020 Imaging and Optical Physics seminar - Zoom webinar
11 Feb 2020 Imaging and Optical Physics seminar - Feb 2020
08 Dec 2019 ANZCOP 2019
02 Dec 2019 9th Australian Conference on Laser Diagnostics
13 Aug 2019 Imaging and Optical Physics Seminar
18 Jul 2019 2019 Dirac Medal and Lecture with Prof. Lene Hau
07 Jul 2019 International Conference on Advanced Vibrational Spectroscopy (ICAVS)
16 May 2019 Sydney OSA Local Section - International Day of Light Event
16 May 2019 International Day of Light
09 Apr 2019 Imaging and Optical Physics seminar
19 Feb 2019 IMAGING & OPTICAL PHYSICS SEMINAR
09 Dec 2018 Australian Institute of Physics Congress 2018
04 Dec 2018 IONS KOALA 2018
23 Oct 2018 OPTICAL PHYSICS SEMINAR
11 Sep 2018 IMAGING & OPTICAL PHYSICS SEMINAR
29 Jul 2018 CLEO Pacific Rim 2018
10 Jul 2018 IMAGING & OPTICAL PHYSICS SEMINAR
06 Mar 2018 Imaging and Optical Physics seminar
03 Dec 2017 Australian and New Zealand Conference on Optics and Photonics 2017 (ANZCOP 2017)
31 Oct 2017 Imaging and Optical Physics (IOP) Seminar
03 Oct 2017 Imaging and Optical Physics seminar at Monash University
29 Sep 2017 CUDOS Legacy Showcase
05 Sep 2017 Imaging and Optical Physics Seminar
01 Aug 2017 X-ray Optics Seminar at Monash University
30 Apr 2017 The International Conference on Biophotonics
24 Apr 2017 The 25th International Conference on Optical Fiber Sensors
12 Dec 2016 The 13th International Conference on Optoelectronics and Microelectronic Materials and Devices (COMMAD2016)
04 Dec 2016 13th Asia-Pacific Physics Conference in conjunction with the 22nd Australian Institute of Physics Congress
05 Sep 2016 OSA Congress: Photonics and Fiber Technology
11 Jul 2016 16th International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)
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