A kind of neutral gray scale dim light filter of stratified film and manufacturing installation thereof

A kind of neutral gray scale dim light filter of stratified film and manufacturing installation thereof

  • CN 204,044,387 U
  • Filed: 06/23/2014
  • Issued: 12/24/2014
  • Est. Priority Date: 06/23/2014
  • Status: Active Grant
First Claim
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1. the neutral gray scale dim light filter of a stratified film, it comprises substrate, it is characterized in that, described substrate is coated with some tunic layers, described rete comprises stacked antireflecting film and metal film, be provided with at least antireflecting film described in one deck between two adjacent described metal films, the refractive index of the constituent material of described antireflecting film is greater than 1.30.

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