8. Operation
tion with the reflector with
In particular, traces on smooth, highly reflective surfaces appear
8.15 Transmitted Light Illumination
The transmitted light illuminator is factory pre- installed and must be ordered along with the stand. It cannot be retrofitted later.
The light is guided to the transparent transmit- ted light object by the cold light illuminator KL2500 and the
The specimen is illuminated by the collector lens, the diffusion filter, the mirror, and con- denser system.
The encoded objective turret recognizes the ob- jective currently being used, and the condenser is automatically adjusted to the current objec- tive magnification.
The light source is centered and yields a homogeneous object field illumination of up to 55 mm field of vision. The cold light source KL2500 is used for fine adjustment of the light intensity.
It can be adjusted electrically and mechanically. For electrical light control, the color tempera- ture is changed. For mechanical light control, the color temperature remains constant.
Note:
The LED (20.9) or (20.11) is green if the corre- sponding lamp is operated in standard mode. If the LED is red, the bulb life of the lamp is re- duced.
The KL2500 can be controlled using the rotary knobs (20.8 and 20.12).
Please make sure that the KL2500 is connected with the included cables on the rear side of the stand.
Likewise, the cable for the condenser lens on the rear side of the stand must be connected.
Examination with transmitted light illumination is a valuable tool for detecting evidence of manip- ulations and forgeries of documents and certifi- cates, as well as for identifying trace evidence in textile and material textures, foils, adhesive tape, etc.
Fig. 28 Transmitted light illuminator
1Receptacle for light guide with 9 mm diameter
1
28
