5
REFLECTED LIGHT BRIGHTFIELD/DARKFIELD OBSERVATION PROCEDURE
}The following flow shows the basic operating procedure for reflected light brightfield or darkfield observation. The operating
procedures for polarized light and Nomarski DIC observations will be described separately in their descriptions. (The micro-
scope frame used is the BX51TRF.)
(Controls Used) (Page)
Select the brightfield (BF) or
darkfield (DF) observation.
@ Mirror selector lever
(P. 7)
Set the main switch to “ I ”
(ON).
² Main switch
Disengage the
analyzer,
polarizer, filter,
etc. from the
light path.
Check
interlocking of
the ND filter.
³ ND filter knob
(P. 10)
Select the light path
(trinocular tube only).
| Light path selector knob
Place the specimen on the
stage.
ƒ Stage plate
… X/Y-axis knobs
Engage the 10X objective in
the light path.
† Revolving nosepiece
Bring the specimen in focus.
‡ Coarse/fine adjustment
knobs
Adjust the
brightness.
Š Brightness control knob
Adjust the
interpupillary
distance.
Adjust the
diopter.
(Controls Used) (Page)
‰ Binocular tube
‹ Diopter adjustment ring
Adjust the aperture iris dia-
phragm and field iris dia-
phragm.
} Open both iris diaphragms
in case of DF observation.
ΠAS knob
(P. 9)
™ FS knob
(P. 7/8)
Engage the desired objective
in the light path and bring the
specimen in focus.
† Revolving nosepiece
‡ Coarse/fine adjustment
knobs
Insert the
required
filters.
š Filter insertion slot
(P. 11)
Adjust the
brightness.
Š Brightness control knob
Start observation.
