From Marginal Revolution:
Here's a mirror installed at the Redwood Library and Atheneum Newport RI earlier this year:“There hasn’t been much innovation with the mirror,” said Ming-Zher Poh, who, as a graduate student at the Massachusetts Institute of Technology, developed a bio-sensing system called the Medical Mirror.And this:
Introduced in 2010, the Medical Mirror uses a camera to measure a person’s pulse rate based on slight variations in the brightness of the face as blood flows each time the heart pumps. A two-way mirror creates a reflection while keeping visible the pulse reading on a computer monitor behind the mirror’s surface.
Japanese electronics conglomerate Panasonic Corp. initially considered targeting household consumers with its digital mirror—a flat-screen display powered by a computer behind a two-way mirror—but the company decided to target business customers instead because of the price....MORE
The mirror placed above the pediment above the original entrance to the
Redwood Library reveals the institution's role as a mirror of the world....