narrow-band filter

We use a tuneable narrow-band filter to do this.

Not all narrow-band filters have been received!

The filter menu is divided into broad- and narrow-band filters, in order of increasing wavelength.

The first is a 28 position wheel containing broad-band and narrow-band filters, and a wire-grid polarizer.

Marc Garneau used a 35-millimetre camera, a special holder containing 12 narrow-band filters and an image intensifier to magnify all visible light.

Note that narrow-band filters (for spectral-line observing) are only available for the first IF of each dual-receiver system.

A number of atmospheric imvestigations are carried out using imp images. aerosol opacity is measured periodically by imaging the Sun through two narrow-band filters.

Urban astrophotographers use special light-pollution or narrow-band filters and advanced computer processing techniques to remove ambient urban light from the background of their images.

For a narrow-band filter, a stub of this sort has the approximate equivalent circuit of a parallel shunt tuned circuit as shown in figure 10b.

Like most planetary nebulae, this one responds well to both high magnification and narrow-band filters, especially an OIII emission filter.

IR images have been acquired with CFHT through a narrow-band filter that avoids OH sky emission.

MIRSI has a selection of broad-band and narrow-band filters, as well as a CVF.

Both channels have a variety of broad and narrow-band filters, as well as prisms and grisms, which enable wide-field, very-low-resolution spectroscopy that is useful for surveys.

Other major projects include searches for supernovae and extrasolar planets (transiting or lensing), and investigations of star formation processes in galaxies through wide and narrow-band filter imaging.

I used a reducing camera (f/20 to f/1.5) designed by Hiltner that allowed me to take narrow-band filter photographs of all the Shapley-Ames galaxies and all the Sharpless H ii regions, as well as many of the Abell clusters.

The HRC and WFC elements consist of eleven broad-band filters, one medium-band filter, five narrow-band filters, three visible and three ultraviolet polarizers, one prism for the HRC, and one grism (580-1100 nm).