Displags nems

Three-dimensional contouring by Precision Visuals software

Contour sof tware

Geophysicists will be able to use three- dimensional graphics modelling in their studies with a software package from Precision Visuals. The contour- ing software runs with the company's device-independent graphics system and comprises a number of subroutines for generating contour maps on a variety of displays, Other applications for the package include meteorology, land use planning and environmental studies.

The package will operate with a number of computer systems which also run the Precision Visuals graphics package. Recent additions to the list of such companies are Data General, whose MV-8000 minicomputer will now take the software and the 4114 graphics terminal from Tektronix.

Precision Visuals Inc, 250 Arapahoe, Boulder, CO 80302, USA

Greater CRT sens i t i v i t y

Permanent internal magnetic lenses in a range of cathode ray tubes from

Philips give better sensitivity, the com- pany claims. A calibrated y sensitivity of 12 V cm -~ maximum is obtained, a 20% improvement over previous types. This reduces the voltage needed from the vertical deflection ampli- fier.

The gun improvement incorporated into the CRT range also reduces the eccentricity of the undeflected spot to 2 mm from 7 mm. This allows a further 10% reduction in the vertical deflection amplifier voltage. The tube has automatic correction to improve orthogonality and astigmatism.

A slim glass envelope for the tube simplifies the mu-metal shield design. The glass flat section is frit-sealed to the tube, making the 140 mm instru- ment CRTs cheaper and easier to mount and adjust.

Philips, PO Box 523, 5600 AM Eindhoven, The Netherlands

Sub-min ia ture LED arrays

Intensity-matched colour LED arrays in five different lengths have been

added to the family of sub-miniature lamps available from Hewlett-Packard. The arrays consist of several sub- miniature lamps moulded as a single strip. Array lengths of three, four, five, six and eight elements are avail- able in red, high efficiency red, yellow, and high performance green.

Arrays are intensity-matched to ensure uniformity in brightness between elements and between other arrays. No cross-talk occurs between elements, says Hewlett-Packard, and the units are end-stackable to give longer arrays. Each element has a diffused lens which provides a wide viewing angle.

Hewlett-Packard intends the lamps for application in industrial controls and as position indicators, edge status indicators and in office equipment monitors. Costs are cut for all these areas since manufacture isof strips, not single elements.

Hewlett-Packard Ltd, Nine Mile Ride, Easthampstead, Wokingharn, Berks RG11 3LL, UK

LED sub-miniature array

232 D ISPLAYS. OCTOBE R 1982