 The
Precise Optics HP Series image intensifier employs the use of
a single output window, which eliminates the small detail contrast
degradation of double glass windows. An anti reflective coating
and darkened stray light absorptive glass contribute to contrast
improvement.
Further in the HX Series, a newly developed thick glass output
window has the advantage of nearly 100% light transmission and
superior small detail contrast. The window, with a coated periphery
that completely absorbs reflected light is entirely free of veiling
glare. Significant improvements are achieved in large area and
small detail contrast ratios.
Another distinguishing characteristic is the new ultra compact output
phosphor. The improved P-20 screen contains more homogenous particles
between 1 to 2 microns in a 4-8 micron thickness, producing lower
fixed pattern noise and further enhancing resolution.
The new high resolution input screen greatly increases X-Ray absorption
producing significantly higher Quantum Detection Efficiency (QDE)
and Conversion Factor. Improved evaporation techniques form a thicker
Csl scintillation screen with low crystal cross talk. Very thin
5 micron diameter needles improve the density and final electro
optical characteristics of the scintillator.
The resulting image contains simultaneously lower noise and more
brightness than previous generations, due to these improved phosphor
depositing technologies. |
