Complete Teardown, Cleaning/Lubrication, and Reassembly of the Olympus BH2-CH Substage Assembly
Revision 1 Page 25 of 26
Figure 106 – Reinstall the condenser-slide stop screw
Adjust the Condenser-Height Stop
The purpose of the condenser-height stop on the
BH2-CH substage assembly is to allow the condenser to
be raised to the height required to achieve the proper
setup for Köhler illumination, yet prevent the upper
lens element from contacting the bottom of the glass
specimen slide. The height stop can be adjusted by first
mounting the condenser into the BH2-CH substage
assembly, and then adjusting the condenser-height
knob until the stop pin in the condenser slide either hits
the stop (see
, shown with the condenser
removed for clarity), or reaches the desired maximum
height (i.e., just short of the point where the upper lens
element of the condenser contacts the bottom of a
glass slide sitting on the stage surface).
Figure 107 – The condenser set to maximum height
If the mechanism reaches the stop at the proper
condenser height, no further adjustment is needed. If it
does not, use a 1.5mm Allen wrench or driver to loosen
the M3x4 set screw securing the stop pin in position
(see
) and turn the condenser-height knob to
set the condenser to the desired maximum height, then
retighten the set screw to lock the stop pin to this new
position. The condenser-height stop should be checked
anytime a different condenser is mounted into the
BH2-CH substage assembly, and should be readjusted if
necessary to prevent the condenser from contacting the
bottom of the glass slide.
Caution:
Never loosen the
M3x4 set screw securing the condenser-height stop pin
(see
) unless the condenser is at or near its
maximum height setting, otherwise the spring in the
stop mechanism might eject the stop pin.
Figure 108 – The set screw for the condenser-height stop
Ready for Service
The BH2-CH substage assembly is now ready for service
and can be reinstalled onto the microscope stand.
Original Olympus Documentation
A scanned PDF of the
Olympus Research Microscope
Series BH2 (BHS) Repair Manual
is available for
download at various microscope-related hobbyist sites
on the internet, and can be found by searching for the
title in an internet search engine, such as Google.
Figure 109 – Olympus BH2 (BHS) repair manual
How to Contact the Author
Please feel free to direct any questions or comments
regarding this document (or BH-2 microscopes in
general) to the author, at the following email address:
