Compact Grism Spectrometer

Details Compact Grism Spectrometer Compact Grism Spectrometer

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...202.0302t&link_type=abstract

American Astronomical Society Meeting 202, #03.02; Bulletin of the American Astronomical Society, Vol. 35, p.702

Astronomy and Astrophysics

Astronomy

Scientific paper

Many observatories and instrument builders are retrofitting visible and near-infrared spectrometers into their existing imaging cameras. Camera designs that reimage the focal plane and have the optical filters located in a pseudo collimated beam are ideal candidates for the addition of a spectrometer. One device commonly used as the dispersing element for such spectrometers is a grism.
The traditional grism is constructed from a prism that has had a diffraction grating applied on one surface. The objective of such a design is to use the prism wedge angle to select the desired "in-line" or "zero-deviation" wavelength that passes through on axis. The grating on the surface of the prism provides much of the dispersion for the spectrometer. A grism can also be used in a "constant-dispersion" design which provides an almost linear spatial scale across the spectrum.
In this paper we provide an overview of the development of a grism spectrometer for use in a near infrared camera and demonstrate that a compact grism spectrometer can be developed on a very modest budget that can be afforded at almost any facility. The grism design was prototyped using visible light and then a final device was constructed which provides partial coverage in the near infrared I, J, H and K astronomical bands using the appropriate band pass filter for order sorting. The near infrared grism presented here provides a spectral resolution of about 650 and velocity resolution of about 450 km/s. The design of this grism relied on a computer code called Xspect, developed by the author, to determine the various critical parameters of the grism. This work was supported by a small equipment grant from NASA and administered by the AAS.

Affiliated with

Also associated with

No associations

Rating

Compact Grism Spectrometer does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Compact Grism Spectrometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compact Grism Spectrometer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1366715