Related Experiment Video
Updated: Jun 6, 2026

Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
High-performance wobbling subreflector for the Millimetre and Infrared Testa Grigia Observatory 2.6-m telescope
Abstract:
The Millimetre and Infrared Testa Grigia Observatory 2.6-m Cassegrain telescope has been designed to allow high-sensitivity observations in the millimeter spectral range. For this purpose, in order to reduce unwanted contributions from local foregrounds, we adopted a sky-chopping technique, by wobbling the telescope subreflector. We describe the design and performance of the wobbling system, which can endure external forced two and three fields square-wave modulation and includes features such as high frequency, high amplitude, high duty cycle, low microphonics, and high stability.
Related Concept Videos
Total Internal Reflection Fluorescence Microscopy
IR Spectrometers
Atomic Emission Spectroscopy: Instrumentation
Galvanometer
The galvanometer consists of two concave-shaped permanent magnets, providing a uniform radial magnetic field in the annular region. In the center, a pivoted coil of fine copper wire is placed in the uniform magnetic...
Infrared (IR) Spectroscopy: Overview
Different compounds display unique properties due to their...
Phase 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...

