
INTRODUCTION 
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2.8  EXTERNAL LIGHTING SYSTEMS In some direct part marking applications best reading results are obtained by using an 
external lighting system. A series of accessory illuminators are available which cover a 
variety of applications. 
The LT-100 Cone Lighting System provides a circular symmetrical light source designed for 
the following applications: 
 with uneven or noisy background surfaces 
 where dot peening or laser etching codes are directly marked onto metal surfaces or 
PCBs and need to be highlighted 
 in the presence of highly reflective surfaces (metal, glass, etc.) causing direct reflections 
Figure 30 - LT-100 Cone Lighting System 
The LT-200 Spot Lighting System provides a high intensity light source designed for the 
following applications: 
 with uneven, noisy and scratched surfaces 
 where dot peening or laser etching codes are directly marked onto metal surfaces or 
PCBs and need to be highlighted. Here the use of more than one Spot Light can remove 
any shadowing effect. 
 in the presence of highly reflective surfaces (metal, glass, etc.) causing direct reflections. 
Low light path to surface angles strongly reduce direct reflections. 
Figure 31 - LT-200 Spot Lighting System