Vidikron 140/150 Position, Ceiling Installation, Floor Installation, Vertical and Horizontal Lens

Installation

Vertical and Horizontal	➤	Proper placement of the projector relative to the screen will yield a rectangular,
Position		perfectly-centered image that completely fills the screen.
		Ideally, the projector should be positioned perpendicular to the screen and in such a way
		that the lens center and screen center are aligned with each other, as shown in Figure 3-3.

Ceiling Installation

Ceiling

Height

Projection Distance

Lens Center

x

		Screen	Lens Center
	Floor Installation
	Height	Screen	Lens Center
	Lens Center
	x
		Projection Distance
			Floor
	Figure 3-3. Projector Placement
Vertical and Horizontal Lens ➤	If it is not possible to align the projector and screen as shown in Figure 3-3,you can use the
Shift	lens shift controls to center the image on the screen. Lens shift is generally expressed as a

percentage of the screen height or width, as shown in Figure 3-4and Figure 3-5.

Screen Center

0%

50% Height

Lens Shift

(0.5 x H)

100% Height

Lens Shift

(1.0 x H)

Note: This is a general example of lens shift. Lenses vary in their shift capabilities. No particular lens or

projector is used in this example.

Figure 3-4. Vertical Lens Shift (EXAMPLE ONLY)

22 Vision Model 140/150 Owner’s Operating Manual