Device for light spot capture
A technology of light spot and light-shielding body, which is applied in the laser field and can solve problems such as affecting the quality of the beam and inconvenient operation
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[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0028] image 3 shows the optical path of the device for intercepting light spots according to an embodiment of the present invention, refer to image 3 , the device for intercepting the spot includes a polarization beam splitter prism 1 (Polarization Cube Beamsplitter, abbreviated as PBS), a left-handed 45° rotor 2, a liquid crystal spatial light modulator 3, a right-handed 45° rotor 4, and a polarization beam splitter arranged in sequence along the optical path. Prism 5.
[0029] In this embodiment, the first PBS acts as a polarizer (it is easy to understand that the PBS can also be replaced by a polarizer), which makes the polarization state of the light level. The left-handed 45° rotor rotates the light with a horizontal polarization state by 45° to the left, so that the polarization state of the light is 45° to the long axis of the liqui...
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