Nikon Eclipse Ti Series, Setup Manual

Page: 198 / 329

Chapter 5 Laser Unit
5.4 LU4A Four-laser Module A
1-184
Figure 5.4-80
In case of the LU4A, remove the fiber coupling and
attach the power meter to the far end of the laser
module body with a tape. It enables you to perform
the AOTF remote controller adjustment while
measuring the laser power.
Precautions
When some steps of the frequency value cause the same maximum power, the lowest
frequency value is used.
The 1st-order light transmittance of the 405-nm laser, 440-nm laser and 638-nm laser is
lower than that of other lasers; it is as low as approximately 65%.
The transmittance of the 488-nm Ar laser passed through the AOTF is approximately 50%
of the whole Ar laser light.
The transmittance of the 543- or 561-nm laser is approximately 90%.
In case the frequency adjustment has failed, a vertical stripe pattern may periodically
appear in a captured image, at the wavelengths of 543 nm and 561 nm in particular. In that
case, carefully readjust the frequency.
4. Subject the sensor of the power meter to the laser
light. Change the [POWER] value by pressing the
arrow key (
∧
or
∨
) button so that the laser power
value of the power meter becomes maximum.
Calculate the 99% value of the maximum. And then
adjust the [POWER] value so that the laser power
value of the power meter becomes the 99% value of
the maximum.
Precautions
If the [POWER] value is too large, the linearity of
the brightness control will be affected. Be sure to
adjust the [POWER] value so that the laser power
value becomes the 99% value of the maximum.
Figure 5.4-81
Attach the power
meter with a tape.