Glass filters are designed to increase computer user productivity through the reduction of glare, static and lowered emissions for a wide range of monitor types. Glass filters eliminate glare through a process of optical interference. If the coating has an index of refraction smaller than that of the glass, the incoming light is exactly out-of-phase with the outgoing light waves, and they cancel each other. Because this interference can work for only one wavelength (usually yellow-green), reflections tend to be purplish.

Glass filters are often coated with a thin anti-reflective (AR) substance to reduce glare and reflections. There are several ways to apply this coating. The glass substrate can simply be dipped in the anti-reflective coating, or an AR coating can be applied to the surface of the glass through evaporation or sputtering. Sputtering, the process used by Sunflex, produces a much more uniform coating over the entire surface of the glass. In addition, a sputtered coating is harder and consequently, more durable.

A study financed by the National Institute of Mental Health found that job satisfaction among office workers declines in proportion to their use of computer CRTs (or VDTs) with full-time VDT operators complaining most of physical ailments and unreasonable workloads. Yet every year more businesses come to rely on computers, with little consideration given to the fact that the lighting in the office environment was not designed with computers in mind.

A survey conducted last year on CRT use by the Data Entry Management Association (DEMA) in Norwalk, Connecticut found that 60 percent of the respondents cited glare as a major problem in the work environment. According to a Hewlett-Packard study on productivity through ergonomic office equipment a 44% increase in productivity of CRT users resulted when environmental improvements were made. One of these improvements included installing filters on computer screens to reduce screen glare and reflection, and increase screen image contrast.

Other issues have to do with static buildup on CRTs, where operators have to clean them daily to remove the dust; and radiation "hazards." Although they have gotten much publicity, studies on effects of radiation from CRTs have produced no industry-accepted data or documentation.

Filter Benefits

Ergonomi Data AB filters reduce screen glare and improve contrast. Consequently, computer users with monitors equipped with Ergonomi Data AB filters experience greatly reduced eyestrain and fatigue. As a result, productivity increases and data is produced with fewer errors. In addition to improved productivity, computer users also have improved employee morale and lower absenteeism.

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