光閘/羅奇規線
Gratings / Ronchi Rulings
R12
Transmission Grating 2 Lines per mm

R15
Transmission Grating 8 Lines per mm

R16
Transmission Grating 20 Lines per mm

R17
Transmission Grating 40 Lines per mm

R25
Transmission Grating 50 Lines per mm

R26
Transmission Grating 100 Lines per mm

R27
Transmission Grating 125 Lines per mm

R28
Transmission Grating 200 Lines per mm