Method for manufacturing light-shielding film for mobile phone lens
With the development of mobile phone camera technology, the requirements for mobile phone lenses are getting higher and higher. The existing mobile phone lenses are generally composed of multiple lenses. In order to block excess light, a light-shielding ring is installed between the lenses.
In the current ordinary light-shielding film, the light-transmitting hole on it is a light hole, and the inner sidewall surface of the light-transmitting hole is without any treatment. Since the light-shielding sheet itself is used to block excess light, strong light will be collected around the light-transmitting hole of the ordinary light-shielding sheet. When the thickness of the light-shielding sheet is thicker, the light reflected from the inner side wall of the light-transmitting hole will be more, and a shadow that destroys the image will be formed on the imaging surface at this time.
Moreover, if the thickness of the light-shielding film is reduced, the inner side wall of the light-transmitting hole will also reflect light. At this time, the light-shielding film cannot be processed with biting and matting; in addition, if the surface of the light-transmitting hole of the light-shielding film is coated with matting Paint, although this method can solve the problem of light reflection on the inner side wall of the light-transmitting hole, this method will require a relatively large cost, and the operation is difficult and the performance is unstable.