BenQ DLP PROJECTOR PE8700 - Manual (Page 12)

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A5. PEAK CONTRAST
Unit: Contrast : 1
Brightness: Default
Contrast: Default
Contrast Ratio = Lux value at the center of a solid white screen/the lux value
of a solid black screen
A6. LIGHT LEAKAGE
Unit: Lux
Brightness: Default
Contrast: Default
Leakage = The maximum light leakage of a solid black screen outside the
projected image
A7. IMAGE DISTORTION
Unit: %
Brightness: Default
Contrast: Default
Measurement procedure:
Measure the dimensions H1, H2 and H3, with H3 at the half image width, as
shown above for both zoom settings. For each the distortion is defined as:
% 100 *
3 * 2
3 * 2 2 1
H
H H H
dist TV
− +
= −
All should be within the absolute specification tolerance.
A8. THROW RATIO
Unit: Ratio : 1
Brightness: Default
Contrast: Default
Throw ratio = projection distance / the width of the projected image