1200 grooves Plane ruled reflection grating
1200 lines optical glass round holographic grating
Plane Ruled diffraction gratings
600 Grooves 25x25mm square plane ruled reflection grating
Glass blanks Plane Ruled Reflective Diffraction Grating
12.7 x 12.7 mm Reflective holographic grating
optical holographic blazed gratings
Reflective Concave Blazed Holographic Gratings