Wide-angle optical system and optical device

A wide-angle optical system, comprising:

• a camera;
• and
• an optoelectric sensor, wherein:
• the camera comprises a first lens, a second lens, a third lens and a fourth lens provided in sequence;
• the first lens comprises a first mirror surface and a second mirror surface, the first mirror surface is a convex surface, and the second mirror surface is a concave surface;
• the second lens comprises a third mirror surface and a fourth mirror surface, and both the third mirror surface and the fourth mirror surface are convex surfaces;
• the third lens comprises a fifth mirror surface and a sixth mirror surface, and both the fifth mirror surface and the sixth mirror surface are convex surfaces;
• the fourth lens comprises a seventh mirror surface and an eighth mirror surface, the seventh mirror surface is a concave surface, and the eighth mirror surface is a convex surface;
• the optoelectric sensor is provided on one side of the eighth mirror surface, a light beam is incident from the first mirror surface into the first lens and configured to pass through the second mirror surface, the third mirror surface, the fourth mirror surface, the fifth mirror surface, the sixth mirror surface, the seventh mirror surface, and the eighth mirror surface in sequence to be incident on the optoelectric sensor;
• the first lens is a negative lens, the second lens is a positive lens, the third lens is a positive lens, and the fourth lens is a negative lens;
• and
• an angle of view field of the camera is 180 degrees to 190 degrees, a relative aperture is 2.0 to 2.8, a diffuse spot diameter is less than 5 μ m, and a relative transmittance is greater than 50%.