Olympus BH-2 - Understanding Phase Contrast Microscopy; Scope of the Document; What is Phase Contrast?; How Does Phase Contrast Work?

Teardown, Cleaning, and Reassembly of the Miscellaneous Parts of the Olympus BH-2 Microscope Frames Revision 1 Page 3 of 45
Clean Components of Light Inlet Assembly (BHT/BHTU) ____________________________________________ 33
Reassemble the Light Inlet Assembly (BHT/BHTU) _________________________________________________ 33
Reinstall Light Inlet Assembly (BHT/BHTU) ______________________________________________________ 35
Light Exit Assembly __________________________________________________________________________ 36
Servicing the Light Exit Assembly ______________________________________________________________ 37
Disassemble the Light Exit Assembly ___________________________________________________________ 37
Clean the Components of Light Exit Assembly ____________________________________________________ 39
Reinstall the Light Exit Assembly Frame onto the Base _____________________________________________ 41
Reassemble the Light Exit Assembly ____________________________________________________________ 41
Collimating the Integral Substage Lighting ________________________________________________________ 43
A Few Words About Dust Protection _____________________________________________________________ 43
Original Olympus Documentation _______________________________________________________________ 44
Olympus Research Microscopes Series BH2 (BHS) Repair Manual ____________________________________ 44
Olympus Research Corporation BH2 Repair ______________________________________________________ 44
How to Contact the Author ____________________________________________________________________ 44
Appendix 1 _________________________________________________________________________________ 45
Parts, Supplies, and Tools Referenced in this Document ___________________________________________ 45
Parts, Supplies, and Tools ____________________________________________________________________ 45
Sources for Parts, Supplies, and Tools __________________________________________________________ 45
Table of Figures
Figure 1 – Head of a typical JIS screw ...............................................................................................................................8
Figure 2 – The viewing head locking screw (BHS/BHT) .....................................................................................................9
Figure 3 – The viewing head locking screw (BHSU/BHTU) ................................................................................................9
Figure 4 – Hold the threaded outer barrel stationary ......................................................................................................9
Figure 5 – Loosen and remove the slotted end-screw................................................................................................... 10
Figure 6 – Snug the knurled outer barrel down ............................................................................................................. 10
Figure 7 – Mounting disk from an old binocular head ................................................................................................... 10
Figure 8 – Place mounting disk into dovetail recess ...................................................................................................... 10
Figure 9 – Slide the mounting disk to expose the e-clip ................................................................................................ 10
Figure 10 – Secure mounting disk so the e-clip stays out .............................................................................................. 11
Figure 11 – Where there’s a will there’s a way .............................................................................................................. 11
Figure 12 – Carefully remove e-clip from the plunger shaft .......................................................................................... 11
Figure 13 – Remove mounting disk from dovetail recess .............................................................................................. 11
Figure 14 – Remove plunger rod from the inner barrel................................................................................................. 11
Figure 15 – Remove spring from stationary inner barrel ............................................................................................... 11
Figure 16 – Unscrew and remove knurled outer barrel................................................................................................. 12
Figure 17 – Clean the outside of stationary inner barrel ............................................................................................... 12
Figure 18 – Clean the bore of the stationary inner barrel ............................................................................................. 12
Figure 19 – Thoroughly clean the plunger rod ............................................................................................................... 12
Figure 20 – Clean threads and bore of the outer barrel ................................................................................................ 12
Figure 21 – Wash the grease from the extension spring ............................................................................................... 12
Figure 22 – Insert spring into the bore of the inner barrel ............................................................................................ 13
Figure 23 – Lightly grease the shaft of the plunger rod ................................................................................................. 13
Figure 24 – Insert plunger into bore of the inner barrel ................................................................................................ 13
Figure 25 – Apply grease to threads of the inner barrel ................................................................................................ 13
Figure 26 – Reinstall the knurled outer barrel ............................................................................................................... 13
Figure 27 – Test the motion of the spring-loaded plunger ............................................................................................ 13
Figure 28 – Place the mounting disk into dovetail recess .............................................................................................. 14
Figure 29 – Slide mounting disk to expose the shaft end .............................................................................................. 14
Figure 30 – Clamp mounting disk to keep shaft exposed .............................................................................................. 14