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R5906848 /04
DP2K SLP Series
169
Tip:
Put in the MCGD file name the type of projection mode (2D or External 3D) and the aspect ratio
(FLAT, SCOPE).
5.
Map the MCGD file with the TCGD file. Use for that the Communicator. Go to
Installation
>
Color calibration
>
Select target colors
. For detailed instructions see user guide of the Communicator.
6.
In addition you can check if the corrected colors comply. Use therefore the Communicator. Go to
Installation
>
Color calibration
>
Verify corrected colors
. For detailed instructions see user guide of the Communicator.
15.2 Light measurements for SmartCare contracts
15.2.1 Screen gain measuring
About screen gain
Fig. A and B illustrate the concept of gain.
A
B
C
Image 15-3
A
Gain 1 (perfect diffuse)
B
Higher gain screen (e.g. 1.8)
C
Higher gain screen (e.g. 1.8)
In Image 15-3, reference
A
, the incident light beam (red arrow) diffuses from a gain 1 screen uniformly in all
directions. The resulting screen brightness (in fL or cd/m2) is L
a
.
In Image 15-3, reference
B
, the screens reflects a higher portion of the light in the direction of the incident
light, at the expense of the light under angles. The resulting screen brightness in the perpendicular direction is
L
b
.
Screen gain is defined as the ratio of the reflected luminance produced by a projector beam of white light
falling onto the screen surface, compared with the reflected luminance of a reference standard with gain of
1.0. The screen gain of the second screen is L
b
/L
a
.
Image 15-3, reference
C
illustrates the case when the incident light on a gain screen is not perpendicular. In
that case, most of the light is reflected in the opposite direction
–
similar to what a mirror would do.
Typically the reference standard for gain measurement is a tile of magnesium carbonate (gain 1.0) which can
be obtained from screen manufacturers. For convenience, white cartridge paper can be used as a reference
standard. It has a gain value of approximately 0.9. Realistic white screens have a gain value of around 0.95.
About Hotspot
Higher gain screens typically experience an effect called
‘
hotspot
’
. The hotspot is not localized, as it depends
on the viewer position versus the projector, so it typically
‘
follows the viewer
’
as people walk around. Every
viewer has his or her own hospot position. In Image 15-4 reference B you see the impression of the hotspot if
you have moved to the left of the center.
Summary of Contents for DP2K SLP Series
Page 1: ...ENABLING BRIGHT OUTCOMES Service Manual DP2K SLP Series ...
Page 4: ......
Page 10: ...R5906848 04 DP2K SLP Series 10 ...
Page 14: ...R5906848 04 DP2K SLP Series 14 Safety ...
Page 24: ...R5906848 04 DP2K SLP Series 24 General ...
Page 30: ...R5906848 04 DP2K SLP Series 30 Preventative maintenance actions ...
Page 38: ...R5906848 04 DP2K SLP Series 38 Mains Input ...
Page 90: ...R5906848 04 DP2K SLP Series 90 Laser Phosphor Light Source ...
Page 94: ...R5906848 04 DP2K SLP Series 94 10 Reinstall all covers Liquid cooling circuit ...
Page 138: ...R5906848 04 DP2K SLP Series 138 Light Pipe ...
Page 147: ...147 R5906848 04 DP2K SLP Series Optical alignment 12 ...
Page 150: ...R5906848 04 DP2K SLP Series 150 Optical alignment ...
Page 248: ...R5906848 04 DP2K SLP Series 248 Card Cage ...
Page 263: ...263 R5906848 04 DP2K SLP Series Exhaust system 20 ...
Page 265: ...265 R5906848 04 DP2K SLP Series Board Diagnostic LED s 21 ...
Page 270: ...R5906848 04 DP2K SLP Series 270 Board Diagnostic LED s ...
Page 290: ...R5906848 04 DP2K SLP Series 290 Dust Filters ...
Page 294: ...R5906848 04 DP2K SLP Series 294 Troubleshooting ...
Page 382: ...R5906848 04 DP2K SLP Series 382 Troubleshooting ...
Page 394: ...R5906848 04 DP2K SLP Series 394 Projector cleaning ...
Page 395: ...395 Overview Hazards R5906848 04 DP2K SLP Series Appendix A ...
Page 409: ...R5906848 04 DP2K SLP Series 409 ...