ViewSonic PJ870 Service Manual - Page 67
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P J870 C/D Table 2. Standard DMD Illumination Conditions PARAMETER INPUT CONDITION OUTPUT CONDITION NOTES Beam numerical aperture (NA) 0.167 (f/3.0) 0.167 (f13.0) NA=nSINU n = 1 (air) U = 9.6° Beam chief ray angle off perpendicular 20° ± 0.25° 0°± 0.25° Relative to system interface plane (See Figure 7 and 10) Chef ray clocking from active area center lines 45°± 1° Perpendicular to mirror tilt axis (See Figure 5 and 7) Spectral blue edge red edge 420 ± 20nm 700 ± 20nm 420 ± 20nm 700 ± 20nm 10% intensity points of filters DMD Panel Screen a. Bright, Color, Dark (all pattern) : (1 dot = 1 pixel) Bright dot not allowed Dark dot 3 Adjacent dark dots not allowed Unstable, blemish dots 6 b. Blue 180 pattern : Dark blemish dots not allowed c. Gray 30 pattern : Bright blemish dots not allowed ViewSonic Corporation rwiln Confidential - Do Not Copy
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