Spectrographs | Photonics Buyers' Guide

Photonics Buyers' Guide > Spectrographs

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(21 companies)

Spectrographs A spectrograph is an optical instrument for forming the spectrum of a light source and recording it on a film. The dispersing medium may be a prism or a diffraction grating. A concave grating requires no other means to form a sharp image of the slit on the film, but a plane grating or a prism requires auxiliary lenses or concave mirrors to act as image-forming means in addition to the dispersing element. Refracting prisms can be used only in parallel light, so a collimating lens is required before the prism and an imaging lens after it. Some special-purpose spectrographs are equipped with tiny photodetectors situated in the spectrum at the positions corresponding to the lines of elements whose presence is to be determined.

SEE ALSO
spectrum measuring instruments

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Hamamatsu Corporation, Sub. of Hamamatsu Photonics K.K. - Bridgewater, NJImporter and distributor of photonic components and subsystems for use in instrumentation. Products include photomultiplier tubes, solid-state photodetectors, IR detectors, image sensors, scientific-grade CCD cameras, light sources and x-ray solutions. In Europe, please call freephone 00 800 800...
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Hellma USA, Inc., Sub. of Hellma GmbH & Co. KG - Plainview, NYManufactures and supplies Hellma cells, fiber optic probes, photometric calibration standards, flat and cylindrical optics and accessories for lasers, spectrophotometers and fluorometers. Supplies Heraeus light sources including vacuum UV, deuterium, hollow cathode, PID spectral calibration and...
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Princeton Instruments, Division of Roper Industries - Trenton, NJPrinceton Instruments designs and manufactures high-performance CCD, ICCD, EMCCD and InGaAs cameras; spectrographs; and optics-based solutions for the scientific research, industrial imaging and OEM communities. Partners with researchers and OEMs to solve challenging problems utilizing...
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TERMS
spectrograph An optical instrument for forming the spectrum of a light source and recording it on a film. The dispersing medium may be a prism or a diffraction grating. A concave grating requires no other means to form a sharp image of the slit on the film, but...