Observations; Reflected Light Brightfield/Darkfield Observations - Olympus BX-URA2 Instruction Manual

OBSERVATIONS

4-1 Reflected Light Brightfield/Darkfield Observations

@
Fig. 22
@
²
Fig. 23
1
Selecting the Light Path for Observation
Rotate the turret @ to set the mirror unit matching the required observa-
tion method in the light path.
Reflected light brightfield
Reflected light darkfield
2
Applications of Filters
As necessary up to two filters may be individually inserted into the filter
insertion positions @ and ². Insert each filter with the marked side facing
toward the observer.
As you insert the filter, you will hear two clicks. At the first, the filter is in the
empty position, and at the second the filter is engaged in the light path.
Usable Filters
@
U-25FR (Frost filter)
U-25LBD
(Color temperature conversion
filter)
U-25IF550 (Green filter)
U-25Y48 (Yellow filter)
²
U-25ND50-2
(Neutral Density filter)
U-25ND25-2
(Neutral Density filter)
U-25ND6-2
(Neutral Density filter)
U-25L42
Inscription Mirror Unit Field Iris
BF U-MBF3 Adjust as required.
DF U-MDF3
Applications
To eliminate uneven illumination.
To convert the color temperature of
the source to the color temperature
of daylight. Used for comfortable
observation and when taking color
photographs.
To increase contrast during mono-
chrome observation. Used when tak-
ing monochrome photographs.
To achieve good contrast for semi-
conductor wafers.
To adjust illumination brightness.
(Transmittance 50%)
To adjust illumination brightness.
(Transmittance 25%)
To adjust illumination brightness
(Transmittance 6%)
To prevent the polarizer burning
when a light source with high in-
tensity is used.
(Fig. 22)
Aperture Iris
Must be open.
(Fig. 23)
39