DIFFRACTION GRATING (Hilger & Watt Type)
15000 Lines per inch, (600Lines/mm)
25000 Lines per inch, (1000Lines/mm)
2500 Lines per inch, (100Lines/mm)
DIFFRACTION GRATING (Hilger & Watt Type)
15000 Lines per inch, (600Lines/mm)
25000 Lines per inch, (1000Lines/mm)
2500 Lines per inch, (100Lines/mm)
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