Related Experiment Video
Updated: Jul 12, 2025
Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
Published on: July 5, 2016
TWINS: improved spatial and angular phase calibration for holography
Abstract:
We present TWINS (TWo INclining Slits), a method for characterizing phase spatial light modulators (SLMs), inspired by Young interferometry. TWINS is an elegant and versatile approach, using minimal equipment and alignment. It measures phase response locally rather than globally, both horizontally and vertically, with high resolution and at wide angles. It can also measure beam intensity profiles as directly seen by the SLM. TWINS characterizes the anisotropic aberrations in the mainstream models of liquid crystal phase SLMs, which is crucial to improve hologram quality. Compensating for anisotropic aberrations measured by TWINS improved the image quality of planar holograms by 10 dB.
Related Concept Videos
01:11Glassware Calibration
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
01:26Phase Contrast and Differential Interference Contrast Microscopy
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...