Optics & Photonics News Magazine
October 2021 Issue
October 2021 Issue
Feature Articles
Departments and Columns
Market Report
Sizing Up Optics and Photonics
Optica’s Tom Hausken looks at estimates of the industry’s growth—and why such estimates matter.
Also in this Issue
Looking Back
30, 20, and 10 Years Ago in OPN
Optical remote sensing of the atmosphere; magnetorheological finishing; scattering technology

![Manual probe system with needles for test of semiconductor on silicon wafer. [A. Morozov / Getty]](https://opnmedia.blob.core.windows.net/$web/opn/media/images/articles/2025/1125/departments/202511-cover-web.jpg?ext=.jpg)
![Researcher Clara Saraceno in the lab. [Image by Carsten Behler Photography]](https://opnmedia.blob.core.windows.net/$web/opn/media/images/articles/2025/1025/departments/202510-cover-web.jpg?ext=.jpg)