2. Measurement Operation
39
2.7 Using the Analog Output Connector
It is possible to obtain analog output from the internal photo-detectors X
2,
Y, Z using this
connector.
・ The analog output connector is a function that can only be used for analog output
model.
2.7.1 Relationship Between Analog Output Voltage and
Luminance
The relationship between the luminance and Y output voltage of analog output 0 to 3.0V is as
shown in the table below, however, this table should be used just as a reference.
The data shown on the LCD have been processed digitally, so when the exact relationship
between the analog output voltage and luminance is needed, it is necessary to take the
correlation with the display into consideration.
(Unit: cd/㎡)
2° 1° 0.2° 0.1°
Range1
0 ～ 30 0 ～ 120 0 ～ 3,000 0 ～ 12,000
Range2
0 ～ 90 0 ～ 360 0 ～ 9,000 0 ～ 36,000
Range3
0 ～ 300 0 ～ 1,200 0 ～ 30,000 0 ～ 120,000
Range4
0 ～ 3000 0 ～ 12,000 0 ～ 300,000 0 ～ 1,200,000
Range5
0 ～ 30,000 0 ～ 120,000 0 ～ 3,000,000 0 ～ 12,000,000
Request
・ The analog output depends on the processing precision of the aperture
mirror, so when an exact value is needed, take the correlation with the
display into consideration.
・ In regards to the analog output for Ｘ
２
and Ｚ, theoretically it do not have relationship
between the analog output voltage and luminance (even though the luminance is the same, the
analog output voltage differs when the spectral distribution of the light source is not same).
Details of relationship between analog output for Ｘ
２
/ Ｚ and luminance not be given here.
Memo
Memo
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