User`s manual

10. Configuring notes
Barco - OverView D series - Doc-3353-2 - user's manual - Revision 05 - Aug 2005
________________________________________________________________________
10-5
10.3 Viewing distance and angle
When planing the installation of OVERVIEW D, anthropotechnical factors such as the human field of vision must be
considered in addition to design requirements. General rules for the viewing angle and distance will not be
specified here since they depend on the field of application. The notes in this section are therefore only recom-
mendations which can be observed for a particular application.
In the case of permanent, intensive viewing of the display, the display should be in the field of vision of both
eyes of the observer. The following figure shows the horizontal and vertical angles of the field of vision with
both eyes. An optimum field of vision can be defined for the horizontal field.
Figure 10-3
Human field of vision for both eyes
The maximum viewing distance depends on the minimum character size used. Characters and upper-case letters
should appear to the eye at an angle of vision greater than 18 angular minutes. This corresponds to a viewing
distance less than 200 times the character height.
Viewed objects
Image
on retina
Angle of vision
Figure 10-4
Angle of vision