Measurement Of Length By Photo Voltice Cell

Product Categories: Electronics, Engineering Equipment, Instrumentation Lab, Instrumentation Lab

Product Page: https://www.labappara.com/product/measurement-of-length-by-photo-diode/

Product Description

Measurement Of Length By Photo Diode

• A photo diode consists of a p - n junction coated with translucent film .
• The light (radiation) is allowed to fall upon its surface, across the junction.
• The junction is made reverse - biased  with an e.m.f source.
• A reverse current flows nearly linearly  with the intensity of light flux.
• The reverse - biased current flows  through diode is linear function of light intensity, thus to measure  the light intensity level, this current is passed through a precision  fixed resistance R.
• The reverse current devlope proportional voltage  across the R, which is than amplified to desired level by an amplifier.