Photodiode
The photodiode pn junction is visible
in the photodiode's window.
Reflective opto-switch.
The LED and photodiode are visible in the end of the switch.
Slotted opto-switch
The LED is in one side
and the photodiode in the other.
Inside a mouse.
The two optical disks and sensors
can be seen.
View of the one optical disk and sensors.
View of the other optical disk and sensors.
SC fibre connectors on a fibre to CAT 5 converter.
The wavelength of the laser is 1310nm.
A slotted optical switch and disk.
A slotted opto switch in a printer.
Used to detect the presence of paper which lifts the level.
CCD from a 1990s scanner.
A CCD from a late 1990s video camera.
Approximately 600 x 450 pixels.
Laser diode from a laser pointer.
Laser diode from a laser pointer.
Helium-Neon laser tube.
The mirror from a HeNe laser tube.
A monochrome vidicon tube.
Tha magnetic scanning coils have been removed from around the tube.
The light sensitive face of a vidicon tube.