Filter Loading Tips; Selection Of A Filter Position; Use Of Blanking Discs; Neutral Density Filters - Sutter Instrument LAMBDA 10-B Operation Manual

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After identifying and positioning the filter cup to be loaded, it is advisable to turn off the
controller before removing the retaining ring from the filter cup. Follow the procedures
described above for installation of filters into filter holders.
CAUTION: An extra word of caution about excessive force is warranted at this point. DO
NOT APPLY EXCESSIVE FORCE! Not only do you run the risk of damaging the filter
but also the filter wheel itself can be permanently distorted by pushing too hard against
the retaining ring with the driver or wrench. If you experience problems securing the
retaining ring, back the ring off the filter cup and try again.
After loading the filter(s), check each newly loaded filter position to make sure that the
retaining ring is not projecting above the top edge of the filter cup then replace the loading
port plug.
Another potential complication of loading filters into the filter cups can occur if the retaining
ring has been previously over-tightened. In this case, it is possible that the filter cup itself
will begin to unscrew from the wheel as the retaining ring is turned. If this occurs, STOP!
Turn the spanner wrench so that the widest end is toward the filter cup and slip the wrench
into the two notches in the edge of the cup. Then turn the wrench clockwise to screw the cup
back into the slider. DO NOT push on the cup. Just screw it in until it seats firmly. It should
then be possible to remove the retaining ring as described above without the cup turning.
It may appear that removal of the cover plate from the housing would facilitate loading
filters. This is not the case! Removal of the cover plate will not give you access to the filter
cup side of the wheel and may lead to misalignment of and damage to the Filter Wheel.
Under no conditions should you ever remove the cover plate or the filter wheel from the
motor shaft. Removal of the cover plate or the wheel from the shaft will void your warranty.

2.6 Filter Loading Tips

2.6.1 Selection of a Filter Position

In most cases any given filter could be installed at any of the ten FILTER POSITIONS.
However, some minor considerations may improve the performance of the system. Adjacent
FILTER POSITIONS will require less switching time. Therefore, if an experiment requires
rapid switching between two filters, they should be located next to one another. If separation
by one or more occupied filter positions is necessary, keep in mind that there will be brief
transitions through, possibly, undesirable wavelengths as light transmits through those
intervening filter(s) unless a shutter is installed and programmed for use.

2.6.2 Use of Blanking Discs

The blanking discs should only be removed from those positions that will contain a filter. The
discs are intended as a safety device to reduce the risk of the user sustaining serious and
permanent eye damage from looking in the microscope when dangerous high intensity light
is present. We strongly urge that the discs be used. Please be careful and avoid the possibility
of direct visualization of high intensity light.

2.6.3 Neutral Density Filters

The individual filter holders are typically used for neutral density filters and are installed as
described above.
LAMBDA 10-B OPERATION MANUAL – REV. 1.20Q (20230227)