Precise Optics
 
 

Improved construction techniques produce higher quality images.

 

  
 

An Aluminum alloy has proved to be the best of a variety of materials used as Intensifier input windows for X-ray transmission, high strength, and lowest scatter. The .7mm window provides a transmission characteristic of up to 95%. Its convex shape brings the input screen close to the entrance plane, maximizing useful field size.
The Hi-Res input screen greatly increases X-ray absorption, producing significantly higher Detection Quantum Efficiency (DQE) and Conversion Factor. Improved evaporation techniques of the needle-like layer allow for a more efficient, thicker (>400µ) CsI scintillation screen with low crystal cross-talk. The 5µ diameter needles are formed with specialized evaporation conditions and heat treatments, determining 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.

  

An accurate electron optic path assures that the electrons emitted by the curved photocathode focus on the flat output screen with minimal distortion or loss of resolution. The 30-35kV cathode-to-anode acceleration voltage provides noise-free brightness gain.
A distinguishing characteristic of the HP Series construction is the Ultra-Compact output phosphor. The improved P22 type screen contains more homogeneous particles, between 1 to 2 microns in a 4-8 micron thickness. This produces lower fixed pattern noise and further enhances resolution.

In the HP Series, the use of a Single-Glass output window eliminates the small detail contrast degradation of double-glass windows. An anti reflective coating and darkened stray light absorptive glass contribute to contrast improvement.

In the QX Series, a Thick-Glass output window has the further advantages 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. The latest development QX Series image tubes will produce yet higher resolution, contrast and lower noise for digital acquisition, without compromising the already outstanding conversion factor and QDE. See Tube Specs for more information.

Summary

Image Systems with Precise Optics HP and QX Series Image Intensifiers will provide higher contrast, lower noise, more brightness, and better resolution. These increased characteristics deliver optimum performance for critical cardio and vascular angiography, as well as the latest digital acquisition techniques for both medical and industrial applications.

 

 

  
 
 
   
 
  Precise Optics / PME, Inc.
239 South Fehr Way
Bay Shore, NY 11706
Tel: 631-242-6600    Fax: 631-242-4421
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