A photodiode is a type of light detector that converts light into voltage or current, based on the mode of operation of the device. It consists of built-in lenses and optical filters and can have small or large surface areas. The photocurrent thus generated is proportional to the absorbed light intensity.
Beside this, what is a spectrometer and what is it used for?
A spectrometer is a device for measuring wavelengths of light over a wide range of the electromagnetic spectrum. It is widely used for spectroscopic analysis of sample materials. The incident light from the light source can be transmitted, absorbed or reflected through the sample.
What are the characteristics of photodiode?
All photodiode characteristics are affected by changes in temperature. They include shunt resistance, dark current, breakdown voltage, responsivity and to a lesser extent other parameters such as junction capacitance.
How does a diode array spectrophotometer work?
Light from the source passes through a sample solution and into a monochromator. Here it is collimated and reflected onto a diffraction grating that separates it into its component wavelengths. The resulting diffracted light is projected onto the CCD detector.
Where is photodiode used?
The combination of LED and photodiode is also used in many sensor systems to characterize different types of products based on their optical absorbance. Photodiodes are often used for accurate measurement of light intensity in science and industry. They generally have a more linear response than photoconductors.