Revisions Log

A log of revisions to articles and news stories.

Nov 6 2024 - The new article introduces global energy demand and climate concerns as motivations for PV technology, adding context to its importance beyond basic applications mentioned in the old article. The updated version explains the photovoltaic effect in stages (photon absorption, charge separation, utilization) and introduces electron-hole pair dynamics, which were briefly mentioned in the old article. Adds detailed descriptions of PV cell layers (e.g., top glass, EVA resin, rear contact) and addresses efficiency factors like incident angle, temperature, and shading—absent in the old article. Introduces multijunction and bifacial solar cells as advanced designs to boost efficiency, not covered in the original article.

Converting Light into Electricity: How Does a Photovoltaic Cell Work?

Oct 29 2024 - New article provides a detailed timeline of optical metrology advancements from spectacles to modern lasers and AI, while the old article briefly covered optical developments. Adds advanced tools and methods, including wavefront sensors (WFSs), optical holography, and metasurfaces, broadening beyond the traditional interferometry and microscopy in the old article. Highlights challenges like sub-nanometer precision and 2D material integration for the semiconductor industry, a more detailed analysis than in the old version. The updated article introduces AI and deep learning as integral to future metrology, marking a shift toward automation and data-driven advancements not mentioned in the original article.

An Introduction to Optical Metrology

Oct 23 2024 - The new article highlights increased adoption of laser technology to meet growing demand for precious metals. It emphasizes the role of lasers in efficiency, cost reduction, and sustainability, compared to the more general introduction in the old article. The new article introduces laser-level transmitters for measurement, laser-based mineral sorting, and laser-induced breakdown spectroscopy (LIBS), which weren’t covered in the old article. The new version provides detailed descriptions of laser applications, such as ytterbium-doped fiber laser systems for drilling and LIBS for real-time analysis, adding technical specifics that the old article lacked. The new article discusses emerging technologies like autonomous face drilling and 3D spatial laser scanning, offering a forward-looking perspective that wasn’t present in the original article.

The Future of Lasers in the Mining Industry

Aug 9 2024 - The content of this article was refreshed to include more comprehensive details and eliminate outdated information.

Scattering: An Overview

Jul 29 2024 - The content has been revised to add more depth and incorporate the latest research.

What Is Diffraction?

Jul 29 2024 - Old Title: Diffraction - What it is and How it Works. New Title: What is Diffraction?

What Is Diffraction?

Jul 25 2024 - This revision offers more comprehensive information, including an outlook on the future of fiber optic communication.

What Are Fiber Optics?

May 28 2024 - Title changed from "3D Imaging: Revolutionizing Diagnostics and Design" to "What is 3D Imaging?"

What is 3D Imaging?

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