I GREATLY regret that in a note of mine on a “new mode of using the concave diffraction grating,” in the “Astronomical Column” of March 22 (p. 501), I wrongly interpreted a sentence of Prof Rizzo's ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This is one of the earliest concave ...

A METHOD has been devised for designing an X-ray spectrometer which requires no movement of the grating or the electronic counter. Spectrometers widely used in the past have contained a fixed light ...

ZEISS has a long tradition in the design and manufacture of optical diffraction gratings for OEM spectroscopic instruments and laser applications. For the last 75 years ZEISS has developed ...

The basic function of any spectrometer is to take in light, break it into its spectral components, digitize the signal as a function of wavelength, and read it out and display it via a computer. In ...