July/August 2021

A diffuser is attached to a gradient-index optic. The diffuser replaces the tube lens in a miniature microscope, adding 3D capability and shrinking the device.

Losing the Lens

Nick Antipa

Bolstered by machine learning and codesign techniques, mask-based lensless imaging offers a route to ultrathin multispectral cameras, novel microscope designs and more.


Tunable Metasurfaces: Controlling Light in Space and Time

Active control of optical properties could take meta­surface applications to the next level.

Toward Lighter, Thinner AR/VR Systems

Liquid-crystal polarization holograms promise to transform head-mounted displays.


Research and Industry News

STEM Workforce Post COVID-19

The Benefits of Volunteering

Imaging’s Multiple Market Paths

Freeform Optics


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