NEW
Digital Plotter
EQUIPMENT
The Complot is a digital incren'.ental plotter suitable for producing charts, graphs, engineering and architectural drawings, or any graphical representation of computer output, and is capable of being run on-line or off-line to a computer or as a remote time-sharing terminal. It has a flat easily viewed plotting area and uses fan-folded chart paper. A variety of paper formats is :
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available, and velum and. mylar prints are easily produced. Ball point, fibre tip and india ink pens can be used. The fan-folded chart-paper packets can be installed or removed at any time after simply raising the recorder lid. Records can be stored in continuous folded form or conveniently torn off as standard-size numbered pages. As a remote terminal to a time sharing computer, the plotter is used in conjunction with a plotter-teletype controller, the function of which is to route signals to the appropriate device. For off-line work, data is read out from the computer at high speed on to magnetic tapes, with packing densities up to 800 b.p.i., for later replay at full plotter rates. The Complot has a maximum incremental plotting speed of 300 steps per second and optional step sizes of 0"01 in 0"005 in. 0.25 mm or 0.1 mm and a maximum plot size of Y axis 11 in. (alternatively 22 in.), X axis 144 ft. Interfaces to most computers can be provided and software support is available. Graphic Displays Ltd., 38a Cromwell Road, Lttton, Beds. Tel: Luton 30847.
Integrated Solid State Light Pens
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AUTUMN 1968
The LP 301 and LP 302 Light Pens, are solid state, sensitive light detection systems having fast response characteristics. They are designed for symbol sensing and editing functions in high data rate c.r.t, displays. With suitable editing logic, these light pens can be used to implement many of the man-
ual or machine functions required in presentday display systems. The optical receiver is a light-weight unit which can be held in the hand and positioned over the face of the c.r.t. It accepts light only from a small area which is precisely defined by an illuminated solid finder circle projected by the pen unit. The finder beam is designed so that, whether in or out of focus, the size of the image of the finder beam delineates the acceptance area for the pen. A fast, stable response time is achieved by employing a sensitive photo detector and associated circuitry to provide an extremely high gain bandwidth. The eight pens are manufactured by Information Control Corporation, California. A VO h~ternational Division, Cordent House, Torrhlgtott Park, London, N.12.
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