Tungsten trioxide, or WO3, can be applied to camera lens. You know, the lens of the camera is the most critical device of the video system, and its quality directly affects the camera's overall specifications. But do you know where the tungsten trioxide is used in the lens of the camera?
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The answer is: optical iris electrochromic devices. Some experts deposited tungsten trioxide and Prussian blue on the substrate by electrodeposition, and then successfully prepared a patterned complementary electrochromic system by photolithography and wet etching. And the system can be used as the optical iris electrochromic device for camera lens to control the change in transmittance. So, why choose WO3 as the electrochromic material? That is because the tungsten trioxide nanopowder is the most studied electrochromic material, and the WO3 film has the advantages of low drive voltage and high chemical stability. Moreover, the porous WO3 film has a wider range of visible light adjustment and higher coloring efficiency.
