Polarization
Holmarc's Brewster's Angle Apparatus (Model No: HO-ED-P-01) is designed to study the Brewster’s angle phenomenon and the polarization of reflected light. The essential elements of the apparatus consists of a goniometer, a laser light source capable of projecting a light beam that is linearly polarized in its plane of incidence, and a pinhole photo detector with output measurement unit for detecting and measuring the intensity of light reflected. The diode laser and polarizer rotator are mounted on an optical rail.
Intensities of reflected light polarized in the plane of incidence and perpendicular to the plane are obtained as a function of angle of incidence. The results should be consistent with Fresnel's laws of reflection.
A beam of light incident on a di-electric transparent material can be resolved into parallel (P) and orthogonal (S) components. These components have different reflection coefficients and Brewster discovered that at a particular angle of incidence Ɵв (called Brewster angle), reflection co-efficient of P-component goes zero. At this angle, direction of reflected and transmitted beam are orthogonal to each other.
Experiment
To measure and plot the graph-reflectivity versus angle of incidence
Fig. Detector Output Vs Incident Angle
To find the Brewster's angle (also known as the polarization angle) of glass plate and determination of refractive index
By Snell’s law,
tan θB = n
Where n is the refractive index of the material.
Scope of Supply
Model No: ED-P-01-GDM
Resolution of prism table : 10 arc min
Resolution of stage : 1 arc min
Quantity : 1 no.
Model No: ED-P-01-OR
Length : 300 mm
Material : Black anodized Aluminum alloy
Quantity : 1 no.
Model No: ED-P-01-KLM
Material : Black anodized Aluminum alloy
Adjustments : Using 80 tpi lead screws
Adjustment Range : +/-4 degrees
Quantity : 1 no.
Model No: ED-P-01-PRM
Material : Sheet Polarizer
Rotation : 360 degree
Resolution : 1 degree
Quantity : 1 no.
Model No: ED-P-01-GS
Dimension : 75 x 25 mm
Thickness : 1 mm
Material : Float
Quantity : 5 nos.
Model No: ED-P-01-DLPR
Wave length : 650 nm
Optical power : 3 mW
Quantity : 1 no.
Model No: ED-P-01-DOMU
Sensor Type : Photo Transistor
Display : 7 segment, 3 ½ digit
Range : 0 - 199 milli / micro amperes
Quantity : 1 no.
Instruction Manual
Established in 1993, Holmarc Opto-Mechatronics Ltd manufactures variety of scientific and engineering instruments for research, industry and education.
ISO 9001:2015 Made in INDIA
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Kerala, India - 683 503
+91 920-719-7772 / 6 / 1
sales@holmarc.com
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