Sony SRX-R320, Руководство по обслуживанию

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1-79 (E)
SRX-R320
10. Measure the screen gain
(1) Set the measuring point on the screen by projecting the Checker pattern (for 2D lens) and the
gray 10 FULL pattern (for 3D lens). (In the case of 3D, measure in the state of Right Image
Muting ON.)
Example) Indicate the measuring point using a fi xed laser pointer.
(2) Measure the illuminance of the measuring point using CL-200.
(3) Place the luminance meter so that the luminance of the measuring point becomes the maximum
level, and then measure the luminance.
Measuring point (illuminance meter setting position)
n
Place the luminance meter so that θ 1 = θ 2.
(4) Calculate the screen gain.
The screen gain SG1 can be calculated by the following formula assuming that the measuring
value of illuminance meter is Ml(lx) and the measurement value of luminance meter is Mf (fL).
SG1 = Mf (fL)
x
3.14/Ml (lx)/0.318
To reduce the measurement error, it is recommended to place a screen piece whose gain SG0 is
known on the above measuring point and calculate the screen gain SG2 in the same way. The
screen gain SG3 after correction can be calculated by the following formula.
SG3 = SG1
x
SG0/SG2
n
In the case of 3D, the lens positions are different between L and R. Therefore, perform the mea-
surement with the Muting of Right Image set to ON for convenience of measurement.
n
Place the luminance meter so that θ 1 = θ 2.
θ 1
θ 2
Luminance meter
Measuring point
(illuminance meter
setting position)
Port glass
Screen