Today there is a great variety of borescopes. Inspectors can choose between an optical or a video tool. But what advantages do videoscopes have? Why are they becoming more and more popular? Video observation is preferred over optical inspection because video recording allows the inspector to see wider area at a greater distance or take advantage of the zoom capability as opposed to a limited, darker traditional flexible borescope optical image. They also help the specialist to avoid eye strain and test fatigue because they offer a more comfortable and natural work environment in front of a display engaging both eyes. In addition, the resolution is much higher and there are no moiré interference, mosaic dots of flexible image fiber bundle.
Videoscopes allow inspectors to record observation results. It is especially convenient when a subsequent review of findings is necessary. Modern computer processing enhances detail, and performs an online image analysis. Videoscope image is generated by CCD sensors and then transmitted via electrical wiring to recording and imaging hub. Generally light source is integrated with the camera at the probe tip. In most cases a light source consists of one or more LED bulbs. Heavy-duty professional and expensive models of videoscopes offer Metal Halide or Xenon light source built into the imaging hub. Such light sources have higher light intensity but more power consuming.Often inspectors are looking for a higher pixel resolution of CCD chip. However don't rely on pixel count only when evaluating performance: it is necessary to test CCD performance in each individual case using a resolution target.
Videoscopes are more energy-depending devices than optical fiberscopes, and this can sometimes be an obstacle. Optical fiberscopes generally don’t need powerful energy cells. Energy is provided only for light source and often it is a small LED light source-handle attached to the body of a fiberscope. Video inspection devices are not as fragile as optical ones consisting of glass fiber bundle. Metal braiding helps to protect wiring and camera from damage.