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Diffraction grating apparatus and method of forming a surface relief pattern in diffraction grating apparatus
Diffraction grating apparatus and method of forming a surface relief pattern in diffraction grating apparatus
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机译:衍射光栅设备和在该衍射光栅设备中形成表面起伏图案的方法
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摘要
A phase diffraction grating apparatus which is usable to generate an array of N spots, where n is an even integer, and the N spots are substantially equally spaced. The generation of an even number of spots is achieved using a translation symmetry in the grating design. Illustratively, the intensities of the N spots are substantially equal. Binary, multi-level, and continuous phase grating embodiments are disclosed. In the case of the multi-level and continuous embodiments, the uniform intensity is obtained using a reflection symmetry in the grating design.
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