Omron V460-H User Manual page 46

Low Angle (Dark Field) Illumination
Low Angle Illumination provides what is called "dark field" illumination, ideal for very low-contrast
marks such as laser-embossed or engraved marks. This type of illumination is useful on both specular
(shiny) and non-specular surfaces, and emphasizes surface texture.
The optimum lighting angle for most marks is 30 degrees, which occurs when the V460-H is approximately
0.25 inches away from the target mark.
Low Angle Illumination directs light inward at an angle that varies with the working distance and provides
an optimal illumination source from contact (5 degrees) to about 0.5 inches (45 degrees). Beyond
this working distance, the illumination zone converts to a general-purpose illuminator as a portion of
the illumination passes straight through the prism. This can be useful in providing "bright field" illumination.
Low Angle Illumination can be selected independently (north or south) or in combination (north + south).
It can also be used simultaneously with any combination of Dome Illumination.
Torch Illumination
Torch Illumination provides high-powered bright field illumination. This type of illumination is designed
for reading 1D and 2D codes that cannot be read easily at contact or near-contact. It is useful for
reading flat direct part marks (DPMs) at a greater distance with some tilt (+/– 15 degrees).
Torch Illumination
Torch Illumination cannot be used in combination with Dome Illumination or Low Angle Illumination.
V460-H Industrial Handheld DPM Reader User Manual
Low Angle Illumination
Low Angle Illumination uses red LEDs only.
Torch Illumination uses high-intensity white LEDs only.
3 Basic Operation
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