![current issue magazine cover](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/articles/2021/2111/departments/cover-opn-nov21-webres.png?t=638452547435869333)
November 2021 Issue
Feature Articles
![](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/articles/2021/2111/features/gao-img1-360x270px.png?t=638452547558642468)
Toward Non-Line-of-Sight Videography
Seeing objects hidden from sight, in real time, could significantly expand humanity’s ability to explore the unknown.
by Xiaohua Feng and Liang Gao![](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/articles/2021/2111/features/zhou-img1-360x270px.png?t=638452547687357653)
Optical Coherence Refraction Tomography
Combining principles of computed tomography with modern machine-learning tools significantly improves OCT’s resolution while extending imaging depth, reducing noise and reconstructing refractive-index maps of biological samples.
by Kevin C. Zhou, Sina Farsiu and Joseph A. Izatt![](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/articles/2021/2111/features/kaaslinen-img1-360x270px.png?t=638452547642185172)
Hyperspectral Lidar: A Progress Report
Laser-scanning instruments that allow hyperspectral and spatial data to be collected in a single shot could improve remote sensing in a wide range of applications.
by Sanna Kaasalainen and Tuomo MalkamäkiDepartments and Columns
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Research and Industry News
Toward a graphene laser / Ultrahigh-definition volumetric display / Boosting LED efficiency / Hybrid perovskite-silicon solar cells / Measuring quantum entanglement dimension / LED streetlights could harm insects / Luminate 2021 winners / UK invests in laser weapons / Women and authorship disputes
![](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/articles/2021/2111/departments/convo-img1-360x270px.png?t=638452547408855704)
Toward High-Throughput, On-Chip Fluorescence Microscopy
OPN gets a project update from Niels Verellen, a physicist at imec who’s designing a chip-scale microscope that could find applications in high-throughput gene sequencing and other areas.
![](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/articles/2021/2111/departments/light-img1-360x270px.png?t=638452547510102505)
The First 3D Movies
Uncovering a technology mash-up from the earliest days of motion pictures.
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Also in this Issue
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Enabling Personal Interactions
Optica aims to support members’ desire to interact and network with our global community.
![](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/articles/2021/2111/departments/looking-img3.png?t=638452547544585522)
30, 20, and 10 Years Ago in OPN
Optics in Desert Storm; Young’s wave theory; the Webb telescope.
![](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/articles/2021/2111/departments/focus-img2.png?t=638452547448702677)
News from the Society
Launching Optica in South Africa / Optica at ECOC / 2021 Forman Award winners / UArizona Grand Challenges building / Ye wins Breakthrough Prize / Women in industry / Optica presidents visit headquarters / Optica Fellow stories / Leibinger awards / Immersivetechnologies incubator meeting / Thank you, editors and volunteers
![](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/imageoftheweek/2021/21-10-11-thumb_1.png?t=638430739604311034)
Phase-Shifted Interferograms
Phase-shifted interferograms that were captured with a four-phase optical coherence microscopy setup.