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3.3 Changing Optics Assemblies
MVR systems equipped with a bayonet optics mount allow their optics assemblies to be changed
quickly by the user, for example to switch from zoom operation to fixed-magnification telecentric
measurements, or to switch between telecentric lenses with different magnifications.
NOTE
T
he positioning of different optics assemblies in the bayonet mount is not
exact, so do not change optics in the middle of a measurement run.
An LED quad ring light is normally part of the 6.5:1 zoom optics assembly and should always
remain attached to that assembly. A different LED ring lights fits all telecentric lens assemblies
from 0.3X to 4.0X. This ring light can be transferred from one telecentric lens to another when
these have been removed from the system.
6.5:1 zoom optics assembly (left), telecentric optics assembly (right)
To remove a lens assembly from the system, first detach the electrical connections of the ring
light. Note that the electrical connectors are latched. Pry the plastic latch open with a flat-blade
screwdriver, and the two connector halves will separate easily. Give the optical assembly a quarter
turn counterclockwise, and the assembly will suddenly be released. Reverse the process to
reinstall.
Cautions
Use two hands to remove a lens assembly, as it is heavy and is suddenly released
after giving it a quarter turn counterclockwise. A drop onto the stage glass could
break the lens and the stage, causing expensive damage.
Do not leave the camera unprotected by a lens assembly to minimize dust settling on
the CCD sensor surface.
Do not touch optical surfaces, since oil from your hands can permanently
damage optical coatings.
Place unused lens assemblies in a polyethylene Ziploc bag for dirt protection.
Store unused lens assemblies in a safe place, since they are breakable and
expensive.
