Words to Describe gratings

How gratings often is described ("________ gratings")

• spatial
• such
• blazed
• modern
• radial
• original
• simple
• etched
• wooden
• chromatic
• ray
• sinusoidal
• square
• parallel
• wave
• sine
• vertical
• concave
• strong
• heavy
• iron
• modulated
• permanent
• crystal
• stationary
• echelette
• conventional
• massive
• ordinary
• identical
• open
• tunable
• oblique
• transient
• metallic
• achromatic
• holographic
• uniform
• binary
• fiber
• low
• induced
• thick
• optical
• finer
• green
• thin
• superimposed
• linear
• dielectric
• periodic
• double
• circular
• rectangular
• bragg
• refractive
• horizontal
• reflective
• ruled
• arrayed
• chirped
• dimensional
• fine
• orthogonal
• curved
• quality
• dynamic
• efficient
• coarse
• largest
• complex
• period
• relief
• multiple