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1. In terms of the formation process of the bubble cloud, it first emerges in the focal region, then grows upward to the post-focal region, and finally forms in the pre-focal region.
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2. Facing this focal point war, both sides do not want to say before the game too the loquacity scattered energy, "this kind of focal point war, uses the foot to speak finally! ""
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3. Surprisingly, the size of the "sweet spot" depends only on the main mirror's focal ratio (the mirror's focal length divided by its diameter) and not its size.
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4. The result reveals that small geometric focal length and large angle may decrease the -3dB focal area, and increase length to width ratio and the pressure magnitude of main lobe.
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5. New infection of truncation parameter on focal shift and focal switch is investigated when studying Laguerre-Gaussian (L-G) beams passing through an aperture-lens separate optic system.
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focal point focal spot
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