Optical lens assembly, imaging apparatus and electronic device

An optical lens assembly, comprising:

• at least two optical lens elements;
• and
• at least one reflective element;
• wherein the reflective element is made of a plastic material, the reflective element comprises a reflective coating membrane, and the reflective coating membrane is disposed on a surface of the reflective element;
• wherein the reflective coating membrane comprises at least three coating layers of different materials, the at least three coating layers are respectively made of a first material, a second material and a third material, the first material mainly comprises silver, the second material mainly comprises titanium, the third material mainly comprises chromium oxides, and the coating layer made of the first material and the coating layer made of the second material are disposed between the coating layer made of the third material and the reflective element;
• wherein an average reflectance in a wavelength range of 800 nm-1000 nm of the reflective coating membrane is R80100, and the following condition is satisfied:
• 97.5%≤R80100;
• wherein the coating layer made of the second material is disposed between the coating layer made of the third material and the coating layer made of the first material;
• wherein a thickness of the coating layer made of the third material is Ter, and the following conditions is satisfied:
• 5 nm≤Tcr≤200 nm.