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10. Operating Acuras
10.1.2 Conditions for Acuras Capture and Realign
SIM 5W in combination with Acuras
If SIM 5W is used in combination with Acuras, it is required that Dynacolor measured values were measured using the AutoAlignment
Head. This means they should be measured from the DynaColor page in the XDS RACU user interface using the M easure button.
Minimum brightness level
A minimum system brightness of one Foot-Lambert (fL) is required to perform a reliable Acuras Capture or Acuras Realign.
Minimum dimmer transmission in SIM 5W
In case of a SIM 5W projector, the CLO target settings must result in a dimmer transmission (CCD dimmer transmission) of 15% or
higher. If the CLO target is set to a value that results in a dimmer transmission below 15%, an error messa
ge will pop up. Remember
that next to this, the lower limit of the CLO target value is 200.
Maximum dimmer transmission during Acuras capture
In a system where the CLO is activated and a CLO target is defined in the Golden Alignment, the dimmer transmission is adjusted in
function of the lamp light output to maintain the image brightness: a decreasing lamp light output(due to lamp aging) is compensated
by an increasing dimmer transmission.
To ensure a brightness level that lasts for a considerable amount of time, it is important to provide for enough dimmer transmission
headroom while storing the highlights of a Golden Alignment and doing an Acuras capture: setting a CLO target that results in a
dimmer transmission of 7000 or 70% results in 30% dimmer transmission headroom.
Once the headroom has been fully used (i.e. dimmer transmission is 100%) an Acuras Realign can be performed, leading to a new
set of targets proposed by Acuras. This is the CLO regression principle.
By default, the maximum allowed dimmer transmission (CCD transmission) during an Acuras capture is 8000 (or 80%), which results
in 20% dimmer transmission headroom.
This maximum allowed dimmer transmission value can be changed in the XDS RACU user interface however. It can be set to a
value up to 10000, resulting in no dimmer transmission headroom at all. In that case, the image brightness level will be maintained
for a couple of days only, which means that after a short period of time you will notice brightness differences between the channels
of your display system. The need for an Acuras Realignment will come up very soon.
Browse to O ptions > Auto Alignment > Acuras and change the value in the edit box next to Maximum dimmer.
Image 10-5
Capture: maximum dimmer
10.2 Gray Level Correction
This chapter only applies t
o LCoS projectors.
118 R59770509 AUTOALIGNMENT HEAD GEN II 26/11/2013