Vidikron 40828 manual Vertical and Horizontal

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)

Base plate

to lens center =

approx. 4" (depending

on the amount of lens shift)

100% Height

Lens Shift

(1.0 x H)

150% Height

Lens Shift

(1.5 x H)

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

Figure 3-4. Vertical Lens Shift

18 Vidikron Vision Model 10/Model 12 Owner’s Operating Manual