Using the cobalt blue filter and slit lamp biomicroscopy, the duration of time required for the first area of tear film breakup after a complete blink was determined.
The microscope is equipped with a field emission gun (FEG) and an in-column omega energy filter (a slit width of 10 eV was used for data collection).
It takes Wollaston prisms as polarimeters, uses filters and slits to select the appropriate wavelength, and locates the monochromatic polarized light images on different places of focal plane.
Possible spurious scattering of light was blocked by installing optical filters and slits that are as narrow as possible.
through all optical elements (slit, filter, window, mirror, crystal monochromator, multilayer, etc).
By conjugating albumin to rhodamine and utilizing a second filter with the slit lamp to measure accumulation of this dye, we demonstrated the persistence of marked permeability during a period when intraocular fluorescein isothiocyanate and albumin levels were relatively constant.
A nickel oxide filter and Soller slit assembly inserted in front of the detector was used to reduce elastic scattering relative to the Cu Kα fluorescence.
On one hand, DHM is wide-field, so that remaining light impinging on the spectrometer is not focused, and is thus strongly filtered by the slit.
I could see the sunlight trying to filter through the slits of the blinds.
We examined the Pb-LIII absorption edge at ambient temperature and pressure in fluorescence mode using a 13- or 30-element Ge detector, typically with a Se 3 or 6 filter and Soller slits to reduce scattered radiation.
