Using the matter to the light absorption characteristic, makes the laminated shape, puts on the path of rays, may weaken the luminous intensity, this kind of laminated part calls optics weaken piece. Light through weaken piece how many with material category related, also concerns with material thickness. If on the weaken piece the standard transmissibility is 0.02, shows the bright light after this weaken piece, only penetrates the original luminous intensity 2%. In bunch of light includes the different wave length the light, the neutral weaken piece meaning is, the light after this kind of weaken piece, the different wave length presses the identical proportion weaken.
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