Beam spreading produces resolution loss and inconsistent images in spectrographs
3) For several years now they have been developing spectrographs
suitable for amateur use.
Traditional Czerny-Turner imaging spectrographs
are subject to imaging aberrations such as coma, astigmatism and spherical aberration.
The previous eclipse occurred 27 years earlier, before amateurs had spectrographs
These planets, named KOI-200b and KOI-889b, are among the first detected with the new high-accuracy spectrograph
HARPS-N, the northern hemisphere counterpart of the most prolific exoplanet hunter, HARPS (ESO).
CNN and the Associated Press reported that a 17-year-old girl won a $100,000 scholarship for building an inexpensive but accurate spectrograph
that identifies the "fingerprints" of different molecules.
will capture the metals and segregate them," he explains.
Until 1912, spectrographs
were mainly purchased by universities to identify and measure spectral lines of newly discovered elements.
7 m grazing-incidence spectrographs
, the NIST researchers successfully recorded spectra in the 5 nm to 60 nm region with image plates, with sensitivity that was comparable to that of photographic emulsions made for this spectral region.
were installed to analyze the light spectra that pass through their apertures, yielding information on the chemical composition of objects in space.
Doppler spectroscopy is an indispensable tool for finding and characterizing extrasolar planets; however, detecting an Earth twin by measuring the radial velocity (RV) perturbation it imposes on the parent star requires nearly one order of magnitude better RV precision than the best current spectrographs
X-shooter is one of the most sensitive spectrographs
on Earth and can observe light from the near-ultraviolet to the near-infrared in one shot.
feature gold-coated gratings for increased efficiency and tunable center wavelength adjustment to allow different laser excitations including 785, 805 or 830 nm.