On some department stores we may see security mirrors. These mirrors are convex. Why?

Security mirrors in department stores are usually convex for several reasons:

1. Increased field of view: Convex mirrors have a wider field of view compared to flat mirrors. They can reflect a larger area and allow store security personnel to see more of the store from a single vantage point.

2. Elimination of blind spots: Convex mirrors help eliminate blind spots by reflecting a wider range of angles. By strategically placing convex mirrors at certain locations, blind spots or hidden areas can be covered, reducing the chances of theft or shoplifting without hindering visibility.

3. Deterrence: The convex shape of the mirror distorts the reflection, making it difficult for someone to accurately gauge the distance or angle at which they are being observed. This can deter potential shoplifters or vandals from committing illegal activities, as they may feel that they are being constantly watched, even if there is no direct line of sight from the security personnel.

4. Improved surveillance: Convex mirrors enhance surveillance capabilities by allowing security personnel to monitor multiple areas simultaneously. The curved shape of these mirrors provides a wider viewing angle, enabling a broader perspective on customers, aisles, corners, or displays.

5. Cost-effective solution: Compared to other surveillance technologies like CCTV cameras or personnel stationed at every corner, security mirrors are a relatively affordable option. They require lower maintenance, no electricity, and can be easily installed in various locations within the store.

Overall, convex security mirrors in department stores provide an inexpensive yet effective way to enhance security, monitor blind spots, and discourage criminal activities, ultimately ensuring a safer shopping environment.