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Gentex HGU-56/P Photochromic Visor

Light Activated Visor for Rotary Wing Helmet Systems

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Gentex Photochromic visor absorbs direct, or light filtered through a vehicle’s windshield to activate the photochromic molecules causing the lens to darken or lighten when exposed or removed from light.


  • Impact resistance in accordance with MIL-V-43511 (tested to MIL-STD-622, using a .22 T37 fragment simulating projectile at a velocity of 550 fps)
  • Optical characteristics in accordance with MIL-V-43511
  • Abrasion resistance in accordance with MIL-C-83409 (front and rear surfaces protected by Gentex’s proprietary scratch resistant hard coating)
  • Reacts in direct sunlight and through canopies
  • Begins darkening instantly
  • Adapts seamlessly for variable lighting conditions
  • Clear state transmissions of greater than 80% PLT (tv), offers future opportunity for combination with some laser eye protection (LEP) filters
  • Maintains a neutral gray color when in darkened state
  • Replaces the need for two visor (clear and tint) kits



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