Different Types Of Optical Sensors Pdf

1 sensor calibration transducers transducer a device that converts a primary form of energy into a corresponding signal with a different energy formsignal with a different energy form primary energy forms.

Different types of optical sensors pdf.

Two main types of sensors are used in. Biomedical instrumentation sensors p. The optical sensor types include point sensor distributed sensor extrinsic sensor intrinsic sensor through beam sensor diffuse reflective sensor and retro reflective sensor. We present a heart rate measuring device in this paper which first infrared light is transmitted by the infrared sensor ir led tx to the fingertip and.

Temperature sensors optical measurements light sensors solid state sensors mems sensors sensor calibration ece 445. Mos t optical and. I physical measurements as input physical measurement units quantity name symbol english or other length meter m feet yard or mile mass kilogram kg lbm slug or ton time second s electric current ampere a temperature kelvin k rankine fahreinheit or celcius amount of substance mole mol luminous intensity candela cd violle. Fundamentals and applications september 2015 david krohn ph d.

Types and characteristics academic resource center. Presentation focus the major focus of this presentation will be on distributive fiber optic sensors which has seen the greatest usage however key applications for point sensors will be discussed the market dynamics will be covered briefly. It requires no ph ysical contact e g. They have more stable output have high sensitivity fast response and suffer from lesser interferences.

Sensor systems and sensor types the simplest partition of optical sensors is into so called intrinsic devices where the interaction occurs actually within an element of the optical fiber itself and extrinsic devices where the optical fiber is used to couple light usually to and from the region where the light beam is influenced by the substance which is being measured 8. Flowing through the system or the potential difference between the electrodes as a result of the oxidation and reduction reactions involving the analyte are used for its quantification in the sample. Bpm which can vary with different conditions. The measurands possible by different optical sensors are temperature velocity liquid level pressure displacement position vibrations chemical species force radiation ph value strain acoustic field and electric field.

The electrochemical sensors do not suffer from the drawbacks of optical sensors. The optical sensor advantages and disadvantages are also covered. Although each type of sensor uses different technology to capture images both ccd and cmos imagers use metal oxide semiconductors having the same degree of sensitivity to light and no inherent quality difference. Ccd charge coupled device and cmos complementary metal oxide semiconductor imagers.