Olympus BH-2 - Using and Maintaining Phase Contrast; Using Phase Contrast; Periodically Verify Centering; About the Phase Contrast Filter

Teardown, Cleaning, and Reassembly of the Miscellaneous Parts of the Olympus BH-2 Microscope Frames Revision 1 Page 6 of 45
Figure 137 – Carefully remove lower glass diffusion disk .............................................................................................. 33
Figure 138 – Place lower diffuser in the recess in barrel ............................................................................................... 33
Figure 139 – Place lower retaining ring into metal barrel ............................................................................................. 34
Figure 140 – Engage and snug the lower retaining ring ................................................................................................ 34
Figure 141 – Place collector lens into metal barrel ....................................................................................................... 34
Figure 142 – Install lower spacer tube into metal barrel ............................................................................................... 34
Figure 143 – Carefully place large diffuser disk into barrel ........................................................................................... 34
Figure 144 – Install the upper spacer tube into barrel .................................................................................................. 34
Figure 145 – Install adiabatic disk into the metal barrel ............................................................................................... 35
Figure 146 – Place upper retaining ring into position .................................................................................................... 35
Figure 147 – Snug upper retaining ring to the glass disk ............................................................................................... 35
Figure 148 – Ready to reinstall the Light Inlet Assembly ............................................................................................... 35
Figure 149 – Bite marks to act as alignment witness marks .......................................................................................... 35
Figure 150 – Insert Light Inlet Assembly into the bore .................................................................................................. 35
Figure 151 – Center the bite marks relative to the holes .............................................................................................. 36
Figure 152 – Reinstall setscrews to secure the barrel ................................................................................................... 36
Figure 153 – Top view of the Light Exit Assemblies ....................................................................................................... 36
Figure 154 – Bottom view of the Light Exit Assemblies ................................................................................................. 36
Figure 155 – Fully open the field diaphragm ................................................................................................................. 37
Figure 156 – Remove screws securing the filter holder................................................................................................. 37
Figure 157 – Lift and remove the filter holder ............................................................................................................... 37
Figure 158 – Lift and remove the field-adjustment ring ................................................................................................ 37
Figure 159 – Lens spanner tool with bent tips ............................................................................................................... 37
Figure 160 – Loosen the threaded retaining ring .......................................................................................................... 37
Figure 161 – Unscrew and remove threaded retaining ring .......................................................................................... 38
Figure 162 – Lift and remove the glass field-exit lens ................................................................................................... 38
Figure 163 – Blow loose dust from the glass lens .......................................................................................................... 38
Figure 164 – Clean both sides of the field-exit lens ....................................................................................................... 38
Figure 165 – Place field-exit lens back into the recess .................................................................................................. 38
Figure 166 – Engage the threaded retaining ring .......................................................................................................... 38
Figure 167 – Snug the threaded retaining ring .............................................................................................................. 39
Figure 168 – Remove screws securing frame to the base ............................................................................................. 39
Figure 169 – Carefully lift frame clear of the base casting ............................................................................................ 39
Figure 170 – Clean the area around the base cutout .................................................................................................... 39
Figure 171 – Thoroughly clean the light-exit frame ....................................................................................................... 39
Figure 172 – Blow all loose dust from the mirror surface ............................................................................................. 40
Figure 173 – Place the frame into a suitable catch pan ................................................................................................. 40
Figure 174 – Wet the reflective surface of the mirror ................................................................................................... 40
Figure 175 – Carefully clean the primary surface mirror ............................................................................................... 40
Figure 176 – Rinse the mirror with distilled/deionized water ....................................................................................... 40
Figure 177 – Blow away most of the rinse water .......................................................................................................... 40
Figure 178 – Thoroughly clean the field-adjustment ring ............................................................................................. 41
Figure 179 – Thoroughly clean the filter holder ............................................................................................................ 41
Figure 180 – Re-install Light Exit frame into base cutout .............................................................................................. 41
Figure 181 – Align holes in the frame with tapped holes .............................................................................................. 41
Figure 182 – Secure the Light Exit frame to the base .................................................................................................... 41
Figure 183 – Apply grease to brass surface in field ring ................................................................................................ 41
Figure 184 – Place the knurled field ring into position .................................................................................................. 42
Figure 185 – Apply oil to the plastic filter holder .......................................................................................................... 42
Figure 186 – Place the filter holder into recess of field ring .......................................................................................... 42
Figure 187 – Align holes in filter holder with tapped holes ........................................................................................... 42
Figure 188 – Field ring at maximum clockwise point ..................................................................................................... 42
Figure 189 – Field ring at maximum counterclockwise point ........................................................................................ 42