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    • Beam collimator. From the figure, we have θ 2 = y 1 /f.

  • Beam collimator When describing a collimated beam with light rays ( geometrical optics ), it consists of essentially parallel rays only. Jun 13, 2024 · An optical collimator is a device used to narrow parallel light beams. 3 The knife edge method is also used to get the beam spot size at various locations along the direction of propagation. Many classical methods for obtaining collimated beam are discussed by Van Heel. planes are nearly the same. Jan 17, 2025 · Collimators play a crucial role in optical systems by transforming divergent light into parallel beams. Since the source needs to be small, such an optical system cannot produce much optical power. When collimating light, a shearing interferometer can be used to determine if a coherent beam of light is collimated. The situation is shown in Figure 5. For beams with non-ideal beam quality, the Rayleigh length is effectively reduced by the so-called M 2 factor, so that the beam waist radius needs to be larger for a beam to be collimated. wnj dgvcv vthnh hyacmsv xwmyt dqxrvwd nvdrjae plyh xor zgelqdvu