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Figure 1
Top: far-field image without beam stop; the ruler shows the actual size of the image (approximately 25 mm outer diameter). Bottom: the same rings with external lights turned off for better contrast, and its ray-tracing simulation. |
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Figure 1
Top: far-field image without beam stop; the ruler shows the actual size of the image (approximately 25 mm outer diameter). Bottom: the same rings with external lights turned off for better contrast, and its ray-tracing simulation. |