DIY Privacy Shades: Make Your Own IR-Blocking Sunglasses

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SUMMARY

This discussion focuses on creating DIY infrared (IR) blocking sunglasses to prevent facial recognition by CCTV cameras. Standard sunglass lenses are transparent to infrared light, necessitating the use of IR-absorbing films and IR-reflective coatings on frames. The target wavelengths for blocking are approximately 850-940nm, which are commonly emitted by CCTV IR sources. The user seeks cost-effective alternatives to commercially available options priced over $150.

PREREQUISITES
  • Understanding of infrared light properties and its impact on facial recognition technology.
  • Knowledge of materials suitable for IR absorption and reflection.
  • Familiarity with spray coatings and their application techniques.
  • Basic skills in modifying consumer sunglasses for DIY projects.
NEXT STEPS
  • Research materials for IR-absorbing films suitable for eyewear applications.
  • Explore IR-reflective coatings and their compatibility with plastic and metal frames.
  • Investigate DIY techniques for applying coatings to sunglasses effectively.
  • Learn about the electromagnetic spectrum, focusing on the 850-940nm range.
USEFUL FOR

This discussion is beneficial for DIY enthusiasts, optical engineers, and individuals interested in privacy technology, particularly those looking to create cost-effective solutions for blocking infrared facial recognition.

phyduck
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TL;DR
I am looking to make a diy version of commercially available privacy sunglasses. The purpose of these glasses is to prevent cctv cameras from using IR facial recognition. Standard sunglass lenses are transparent to infrared.
I am looking to make a DIY version of commercially available privacy sunglasses. The purpose of these glasses is to prevent cctv cameras from using IR facial recognition.

Standard sunglass lenses are transparent to infrared. To circumvent this, the lenses have the ability to absorb IR light. Also, the frames have highly reflective infrared properties, while appearing matte/dull in the visible spectrum. I am guessing that since most cctv ir emitters produce light in the ~850/940nm range, this is the portion of the electromagnetic spectrum at play here.

The commercially available options seem a bit pricey at over 150 USD a pair,, so I'm looking for a diy option. To do this I plan on taking consumer sunglasses and 1) spraying the frame with an IR reflective/invisible to humans coating and 2) placing an IR absorbing film over the lenses. Any ideas on what type of materials I am looking for?
 
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