How robots work


 

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The Video Camera Reigns Supreme

The video camera first made its debut in theinfinite regression - repetition of a scene.
television industry but has now penetratedVideo cameras were first meant for
the common field. BBC (British Broadcastingbroadcasting television pictures. The first
Company) used the first ones in the 1930`s.ones were large, mounted on trolleys and
The video camera is used mainly for twoconnected by wires to recorders kept in
purposes. The primary one is for projectionanother room. Technology meant downsizing
of live shows, like the ones we see on theeverything to mini handy proportions.
television as also for immediate spying asSimultaneously costs began to go down making
used by and for the military and industrialit more affordable to the common people.
operations. The second purpose is for storageSales shot up boosting further research in
and archiving. Videotapes were at one time inthe field. Shoulder operated luggage type
use but now discs have replaced these. Thevideo cameras used to sell for US$1500. Today
latest video cameras (filmadora) are a farbetter features are available from a mini
cry from its first generation models -model of video camera (filmadora) that can
similarities are difficult to trace.rest on the palm of the hand for US$150! It
Professional models of video cameras areis a revolution in evolution. It consists of
mobile units and allow fine manual control asthree parts - the lens, the imager and the
required in fieldwork. Camcorders (filmadora)recorder. The lens focuses light on the
are also video cameras - it is a combinationobject. The imager converts this into video
of a camera and a recording device (VCR).signal and then finally it is stored or
These are in great demand for home movies,recorded in the recorder. The camera
television production, electronic news(filmadora) section consists of the optics
conferences etc. Another type of video cameraand the imager. The lens has an aperture to
is the closed circuit variety that is usedcontrol light, zoom to define the field of
for security and monitoring. They are tiny sovision and shutter-speed to capture motion in
that can be hidden and are often used tocontinuity. The electronics automatically
monitor the environment in settings where mancontrols and adjusts these units.
cannot physically go. These web cams areProfessionals have the option of choosing
video cameras used where there is danger fromfrom models, which have manual functions as
radiation, excessive heat and exposure towell so that the operator has a say in the
poisonous chemicals and inhospitable terrain.matter. The imager is the eye of the set and
Another model is the digital camera thatchanges light into video signal
converts the signal to a digital output andelectronically. The recorder writes the video
these are even smaller than the securitysignal on to a magnetic videotape or disc.
cameras. Often these are incorporated intoThe time and date are also recorded. From
the body of the computer or mobile pones andancient times man has been desperate and keen
laptops. Special types of video cameras areto capture in time what is fleeting and
used abroad satellites for probing space ortransitory. He has scratched on stone and
inserted in robots creating artificialpapyrus building library after library of
intelligence. These come in handy also forlife that is as fleeting as the moving river.
medical use. Video cameras (filmadora) areThis urge still remains. With the video
slowly taking over the film world as videocamera (filmadora) we capture eternally our
technology improves by the day. Video cameraspersonal lives and record history of protests
are now able to create special effects likeand speeches.



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