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What is the Principle of Car Rearview Mirrors?

2 Answers

Kennedy

07/29/25 1:11pm

Rearview mirrors involve the concept of a field of view, which refers to the range that the mirror surface can reflect. The industry proposes three key elements of the field of view: the distance between the driver's eyes and the rearview mirror, the size of the rearview mirror, and the radius of curvature of the mirror surface. These three elements are interrelated—when the distance and size of the rearview mirror are the same, a smaller radius of curvature of the mirror surface results in a larger reflected field of view. Rearview mirrors can be classified by installation location as follows: 1. Interior rearview mirror: This mirror allows the driver to confirm the rear situation without significantly altering their forward line of sight. 2. Exterior rearview mirror: Passenger cars typically mount exterior rearview mirrors on the doors. In Japan, they are also mounted on the fenders. 3. Undercarriage mirror: This mirror enables the driver to see areas beyond the front and rear wheels beneath the car body from the driver's seat, helping them identify whether there are people or obstacles near the wheels or beside the vehicle when reversing or starting forward. This prevents injuries, damage to objects or the vehicle, and provides convenience and safety for the driver.

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OElliott

08/14/25 3:00am

The principle of the car rearview mirror is quite simple—it essentially uses a flat mirror to reflect light, allowing us to see what's behind the car while seated inside. Light from the rear hits the mirror, reflects into your eyes, and forms a virtual image, enabling you to monitor traffic without turning your head. The key point is that the mirror is typically flat, ensuring the image remains undistorted. Properly adjusting its position helps cover blind spots. I always rely on it to avoid rear-end collisions while driving. Nowadays, many cars even come upgraded with anti-glare features, reducing eye strain from bright lights at night. As for daily maintenance, it's important to clean the mirror surface periodically to maintain clarity—this is crucial for driving safety, especially on highways where accidents can happen in the blink of an eye.

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