reflection echelon grating
反射阶梯光栅

• thread pitch
• three-axis laser gyro package
• three-beam speckle pattern interferometer
• three-colo[u]r camera
• three-colo[u]r filter
• three-component zoom lens
• three-coordinates measuring machine
• three-dimensional
• three-dimensional appeal
• three-dimensional camera
• three-dimensional cinema
• three-dimensional film
• three-dimensional fringes
• three-dimensional grating
• three-dimensional holography
• three-dimensional image
• three-dimensional imager
• three-dimensional imaging
• three-dimensional laser radar
• three-dimensional optical transform
• three-dimensional photo
• three-dimensional photography
• three-dimensional projection
• three-dimensional projection screen
• three-dimensional projector