HOME > Products & Service > Machine Vision Applications > Technical Guide > The Difference between Wide-type and Narrow-type
Introducing our various lighting techniques using LED lightng system.
Explaination of how Wide-type and Narrow-type LEDs work in LED lighting.
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The LED used in LDR2-70RD-WD has a Wide lighting area.
On the other hand, the LED used in LDR2-70RD has a Narrow lighting area. |
The Wide-type and Narrow-type are shown at the left and right, respectively.
The Wide-type has a wide lighting area and the Narrow-type has a narrow lighting area. However, the Narrow-type has a long lighting range. |
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LDR2-70RD-WD and LDR2-70RD are put in the same condition and an image of the post card is captured. The difference between the lighting area of Wide-type and lighting area of Narrow-type was examined.
【Target work】Post card |
【Photography Conditions】
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The Wide-type can light the entire view comparatively uniformly because the Wide-type has a wide light area. |
The figure above shows the binarized data shown at the figure at the left. You can see that the light can illuminate the wide area relatively. |
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The Narrow-type which has a long lighting range can illuminate the center of the target area more brightly than the Wide-type. However, the area around the center is dark because the lighting area of the Narrow-type is small. |
By binarizing the results shown at the figure at the left with the same threshold value as the Wide-type, it can be confirmed that the lighting area of Wide-type and that of Narrow-type are different from each other considerably. |
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