Binocular eyepiece head and modem: what they have in common

1. Step 1. Binocular eyepiece head — is part of — Operating microscope. Eyepieces for the surgeon.
2. Step 2. Operating microscope — has part — LED. An illuminator.
3. Step 3. LED — is part of — Pulse oximeter. Red and infrared LEDs.
4. Step 4. Pulse oximeter — has part — Photodiode. A photodiode.
5. Step 5. Photodiode — is used in — Fax. Scanning with a photocell.
6. Step 6. Fax — has part — Modem. It transmits an image over a telephone line.

Open Evothings