Enhanced temperature sensing with liquid-crystal filling
A fast-response optical sensor based on a slot-waveguide micro-ring resonator with liquid-crystal filling enables more accurate temperature measurement with a nearly fivefold increase in sensitivity.
The near-IR spectrograph for the James Webb Space Telescope
The first space application of a new multi-object spectrograph incorporates programmable micro-shutter arrays and silicon carbide materials.
Azimuthally and radially polarized off-axis lasers
A large-apex-angle intracavity axicon combined with control of the cavity length enabled production of both azimuthally and radially polarized beams.
Extending nodal aberration theory to freeform surfaces
An approach that describes the aberration fields of displaced optics provides a step toward an unrestricted aberration theory for nonsymmetric imaging optics with freeform surfaces.
Fast non-destructive testing under dynamic loading
A novel digital shearography system based on spatial phase shifts operates at high speed.
A 2D optical slope measuring tool for x-ray mirrors
A novel approach that stitches images from the highly sensitive Shack-Hartmann sensor system offers accurate measurement of x-ray optics.
Difference frequency generation makes tunable mid-IR lasers possible
Nonlinear frequency mixing of two laser sources results in a widely tunable laser perfectly suited for molecular spectroscopy.
Testing general relativity with a high-density satellite
The Laser Relativity Satellite is built from a specifically chosen, dense tungsten alloy and is covered with laser retroreflectors to test general relativity and fundamental physics.
UV all-angle negative refraction and active flat lensingStories 1 - 10 of 360
A novel bulk metamaterial enables an optically switchable flat lens capable of imaging 2D objects beyond the near field.