Video image output system

In today s industry, digital cameras have replaced most video systems. All information about the illumination system, data processing equipment and image output system given in Section 7.3 also apply here. Only the current software determines how to achieve a qualitative and/or quantitative evaluation of chromatograms. For the topic Digital Camera see Documentation , Section 8.5. 

When the commercial OMA (Model 1205, Princeton Applied Research Corporation, Princeton, NJ) became available, we recognized its potential as a replacement for the photomultiplier detector. The vidicon detector surface was divided into 500 channels, the image could be seen on a cathode ray tube (CRT) monitor in real time, the intensity profile was available in digital form, the profile could be time-averaged for any desired number of video scans, and the final profile was stored in internal memory for transfer to an external output device. Not only had a considerable amount of work gone into its development and the verification of performance, but its potential for use for a variety of physical techniques would ensure the construction of enough units to support further development of the system. Moreover the need for low-light-level detectors for other purposes would lead to further improvements in detector devices. 

Evaluation of tracer on the skin surface was conducted with the VITAE system, following a protocol similar to that described elsewhere 3) The system quantifies fluorescence intensity in the following manner a television camera scans the surface area of a body part 30 times per second. A video digitizer in the computer takes one of these scans, converts the analog camera output to digital values on the basis of a 16 level grey scale, and displays the image on a TV monitor. The data is then stored on disk and is available for later analysis. 

A pyroelectric vidicon or pyrovidicon is a video camera tube that operates in the IR (2-20 pm) region instead of the visible spectrum. Electronically scanned thermal imaging systems based on pyrovidicons and filtered to operate in the 8-14 pm atmospheric window provide qualitative thermal images and are classified as thermal viewers. Figure 2.21 is a cross-sectional schematic of a pyrovidicon camera tube used in pyrovidicon imagers. The output of the pyrovidicon tube is compatible with standard video processing electronics. 

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