Ohp Sensor - MINOLTA-QMS Magicolor 2200 Series Manual

1-6 OHP sensor

This sensor detects when transparent (OHP) film is being used.
Because the film is transparent, the LED light from the light-emitting section of the sensor passes through it and is
reflected by the Prism Lens mounted at the top of the sensor. This light enters the Prism Lens (LED light), and the pres-
ence of the OHP film is detected. Ordinary plain paper prevents the light from entering the photo sensor, and it is there-
fore not detected as OHP film.
If the paper that has been set (OHP) is actually ordinary plain paper, the printout will be white.
LED
OHP film
Prism Lens
photo sensor
OHP sensor
C-7
Ordinary plain paper