请教一下大家，为什么设计出来的菲涅尔透镜只有中心聚焦？
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Channel Details:
- Title: TracePro
- Channel Number: 61304033
- Language: Chinese
- Registered On: March 12, 2016, 6:37 am
- Number of Articles: 780
- Latest Snapshot: January 25, 2025, 4:48 am
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