Aberration-corrected concave grating for the mid-infrared spectrometer aboard the Infrared Telescope in Space

Details Aberration-corrected concave grating for the mid-infrared spectrometer aboard the Infrared Telescope in Space Aberration-corrected concave grating for the mid-infrared spectrometer aboard the Infrared Telescope in Space

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apopt..34..659o&link_type=abstract

Applied Optics, Volume 34, Issue 4, February 1, 1995, pp.659-666

Physics

Optics

5

Astronomy, Space Optics, Telescopes, Spectrometers, Infrared, Gratings

Scientific paper

A mechanically ruled aberration-corrected concave grating was developed for use in the low-resolution mid-infrared spectrometer aboard the cryogenically cooled Infrared Telescope in Space. The design and the performance testing of the grating are reported. The spectrometer requires a wide spectral range (4.5-11.7 mu m) and a wide field of view (8 \times 8 arcmin) with a low wavelength resolution ( Delta lambda less than or equals 0.3 mu m). The aberration-corrected concave grating provides a flat focal plane with a small aberration in the spatial direction compared with those caused by the finite size of the entrance slit. It also permits a simple design for the spectrometer, which is advantageous for applications in space cryogenic instruments. The measurements of the wavelength resolution and the spatial resolution are shown to be in good agreement with the predicted performance. The diffraction efficiency of the grating is more than 80% at the blaze wavelength (6 mu m) and fairly high ( greater than 30%) over the entire wavelength range in question. The grating produces polarization of less than 10% for lambda less than 6.4 mu m and of 10-20% for 6.7 mu m less than lambda less than 9.7 mu m. These results indicate the potential applicability of this type of grating to the wide-field IR spectroscopic observations.

Affiliated with

Also associated with

No associations

Rating

Aberration-corrected concave grating for the mid-infrared spectrometer aboard the Infrared Telescope in Space 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 Aberration-corrected concave grating for the mid-infrared spectrometer aboard the Infrared Telescope in Space, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aberration-corrected concave grating for the mid-infrared spectrometer aboard the Infrared Telescope in Space will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1631272