Method for shaping round beam into spot beam and annular beam
A ring beam and beam shaping technology, which is applied in the field of non-imaging optics, can solve the problems of large terminal volume, complex structure of terminal optical system, unfavorable development of terminal miniaturization, etc., and achieve the effect of reducing terminal volume and improving tracking stability
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specific Embodiment approach 1
[0038] Specific implementation mode one: combine Figure 1 to Figure 7 Describe this embodiment mode, a kind of method that is used to realize circular light beam shaping into point ring beam in this embodiment mode is realized according to the following steps:
[0039] The specific steps of the design method for shaping a circular beam into a ring beam are as follows:
[0040] (1) if Figure 5 , to determine the diameter D of the incident beam 0 , the diameter of the inner and outer rings of the ring beam D 1 、D 2 , and the distance L between the composite functional element and the four-quadrant detector: If the aperture of the optical antenna is d and its magnification is T, then D 0 =d / T;
[0041] (2) if Figure 5 , to determine the aperture D of the communication beam: if the communication optical power accounts for η of the incident optical power, then
[0042] D = η D 0
[004...
specific Embodiment approach 2
[0066] Specific implementation mode two: the difference between this implementation mode and specific implementation mode one is: the D described in step (1) 1 and D 2 It is mainly related to the size of the four-quadrant detector, and it should be ensured that they are all within the detection range of the detector; take L≥2D 0 . Other steps and parameters are the same as those in Embodiment 1.
specific Embodiment approach 3
[0067] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: in step (2), 0<η<1, which is determined by parameters such as incident light power and bit error rate. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.
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