Digital Projection Projector HIGHlite Laser II 3D Series User Manual

page 93
Reference Guide
SCREEN REQUIREMENTS
Fitting the image to the screen
It is important that your screen is of sufficient height and 
width to display images at all the aspect ratios you are 
planning to use.
Use the conversion chart to check that you are able 
to display the full image on your screen. If you have 
insufficient height or width, you will have to reduce the 
overall image size in order to display the full image on 
your screen.
14:3 = 1.33:1
W = H x 1.33, H = W x 0.75
216:10 = 1.6:1...

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Reference Guide
SCREEN REQUIREMENTS
Positioning the screen and projector
For optimum viewing, the screen should be a flat surface 
perpendicular to the floor. The bottom of the screen should 
be 1.2 m (4 feet) above the floor and the front row of the 
audience should not have to look up more than 30° to see 
the top of the screen.
The distance between the front row of the audience and 
the screen should be at least twice the screen height and 
the distance between the back row and the screen...

page 95
Reference Guide
POSITIONING THE IMAGE
Positioning The Image
The normal position for the projector is at the centre of the screen. Ho\
wever, you can set the projector above or below the centre, or to one side, 
and adjust the image using the Lens shift feature (known as rising and falling front) to maintain a geometrically correct image.
Notes
 For more information on shifting 
the lens, see Lens control  in the 
Operating Guide .
 Whenever possible, position the 
projector so that the lens is...

page 96
Reference Guide
POSITIONING THE IMAGE
Any single adjustment outside the ranges specified on the following page may result in an unacceptable level of distortion, particularly at the 
corners of the image, due to the image passing through the periphery of \
the lens optics.
If the lens is to be shifted in two directions combined, the maximum ran\
ge without distortion will be somewhat less, as can be seen in the 
illustrations below.
Notes
 For more information on shifting 
the lens, see Lens...

page 97
Reference Guide
POSITIONING THE IMAGE
Maximum offset range
The maximum offset range available with no distortion or vignetting is dependent on wh\
ich lens is used. Shifting the lens beyond its 
undistorted limits may be physically possible, however you may experienc\
e some vignetting or distortion.
vertical 
(pixels)
horizontal 
(pixels)
vertical 
(frame)
horizontal 
(frame)
0.77 : 1 and 1.16:1 fixed lens±240±96±0.2±0.05
all zoom lens±720±288±0.6±0.15
Notes
 For more information on shifting...

page 98
Reference Guide
ASPECT RATIOS EXPLAINED
Aspect Ratios Explained
The appearance of a projected image on the screen depends on a combinati\
on of the following:
• The DMD™ resolution is WUXGA with a 1920 x 1200 resolution, corresponding to an aspect ratio of 16:1\
0
• The aspect ratio of the input signal: usually 4:3, 16:9 or 16:10
• The value of the Aspect Ratio setting of the projector:
• 16:9, 4:3, 16:10 and 5:4 stretch the image to the selected aspect ratio. 16:9 leaves black bars at the top...

page 99
Reference Guide
ASPECT RATIOS EXPLAINED
Aspect ratio examples
Source: 4:3
Source: 16:9
Source: 16:10 (native)
Notes
Aspect Ratio: Source / 16:9Aspect Ratio: 16:10
1
1
Aspect Ratio: Source / 16:10
Aspect Ratio: Source / 4:3Aspect Ratio: 16:10
11
1Unused screen areas 
Digital Projection HIGHlite Laser II 3D Series 
Rev A August 2016  

page 100
Reference Guide
ASPECT RATIOS EXPLAINED
Aspect ratio example: TheaterScope
The TheaterScope setting is used in combination with an anamorphic lens to restore 2.35:\
1 images packed into a 16:9 frame. Such images 
are projected with black lines at the top and bottom of the 16:9 screen \
to make up for the difference in aspect ratios.
Without an anamorphic lens and without the TheaterScope setting applied, a 16:9 source containing a 2.35:1 image lo\
oks like this:
If we change the setting to...

page 101
Reference Guide
FRAME RATES AND PULLDOWNS EXPLAINED
Frame Rates And Pulldowns Explained
Interlaced and progressive scan
A progressive scan is a method of updating the image by drawing all the lines of each frame in a sequence. In contrast, interlaced 
video alternately scans odd and even lines. In old analog TV interlacing was commonly used as a way of doubling the refresh rate without 
consuming extra bandwidth.
The following artifacts are common with interlaced video:
• edge tear (combing)
The...

page 102
Reference Guide
FRAME RATES AND PULLDOWNS EXPLAINED
Pulldowns - conversion into destination formats
Pulldowns are a method of converting a 24p source into a different destination format by adding extra frames to the source.
2:3 (nor mal) pulldown
This method is used to convert a 24p source (film) into a 60i destination (NTSC video) by adding two extra fields for every four frames, 
effectively increasing the frame rate to 30 fps. The frame is split into fields and then two fields are repeated...