Precision Optical Diffraction Grating Kit with Five Pieces Size 50x50mm
18,86 €
Grid: grid is composed of 90 degree cross lines, 20, 40, 60 lines/MM respectively. The side length of the square is 0.2mm, and the side length of the rectangle is 0.6 0.28mm. Single seam: seam width is 0.05, 0.1, 0.2m, three types.
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