Related Experiment Video
Updated: Jul 4, 2025
12:19
Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
Published on: April 4, 2017
8.4K
Analysis of phase calculation error introduced by the extinction ratio in instantaneous phase shifting interference
Optics Express
|February 1, 2024
Summary
This study addresses phase calculation errors in interferometry caused by imperfect micropolarizer extinction ratios (ER). It introduces theoretical models and calibration methods to improve accuracy in pixel micropolarizer camera applications.
Area of Science:
- Optics and Photonics
- Metrology and Measurement Science
Background:
- Instantaneous phase shifting interferometry utilizes pixel micropolarizer cameras for efficient measurements.
- Limitations in micropolarizer extinction ratios (ER) significantly impact phase calculation accuracy.
Purpose of the Study:
- To theoretically analyze and quantify phase calculation errors due to varying extinction ratios (ER).
- To propose error correction and calibration models to mitigate these inaccuracies.
Main Methods:
- Derivation of a theoretical expression for phase calculation error based on extinction ratio (ER).
- Development of an error correction model and a calibration model for improved accuracy.
Main Results:
- Quantified the impact of extinction ratio (ER) on phase calculation accuracy.
- Demonstrated the effectiveness of proposed models in reducing phase calculation errors.
Conclusions:
- The theoretical analysis provides a basis for assessing pixel micropolarizer camera polarization characteristics.
- The developed models offer practical solutions for enhancing measurement accuracy in interferometry.
Related Concept Videos
01:10Interference: Path Lengths
1.3K
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
1.3K
01:24Time and frequency -Domain Interpretation of Phase-lead Control
84
Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
84
01:15Gain
181
Gain and phase shift are properties of linear circuits that describe the effect a circuit has on a sinusoidal input voltage or current. The circuit's behavior that contains reactive elements will depend on the frequency of the input sinusoid. As a result, it is observed that the gain and phase shift will all be frequency functions.
Gain:
Suppose Vin is the input and Vout is the output signal to a circuit.
Gain:
Suppose Vin is the input and Vout is the output signal to a circuit.
181
01:18Fault Types
89
When analyzing a single line-to-ground fault from phase A to ground at a three-phase bus, it is important to consider the fault impedance. This impedance is zero for a bolted fault, equal to the arc impedance for an arcing fault, and represents the total fault impedance for a transmission-line insulator flashover. To derive sequence and phase currents, fault conditions are translated from the phase domain to the sequence domain.
For line-to-line faults occurring between phases B and C, the...
For line-to-line faults occurring between phases B and C, the...
89
01:21Power System Three-Phase Short Circuits
88
Determining the subtransient fault current in a power system involves representing transformers by their leakage reactances, transmission lines by their equivalent series reactances, and synchronous machines as constant voltage sources behind their subtransient reactances. In this analysis, certain elements are excluded, such as winding resistances, series resistances, shunt admittances, delta-Y phase shifts, armature resistance, saturation, saliency, non-rotating impedance loads, and small...
88
01:22Series R—L Circuit Transients
102
In a series resistor-inductor (R-L) circuit, closing the switch at the start of the time period simulates a three-phase short circuit, a fault condition where all three phases of an unloaded synchronous machine are short-circuited. When there is no fault impedance and no initial current, the initial voltage is determined by the phase angle of the source voltage.
Using Kirchhoff's Voltage Law (KVL) to analyze this circuit helps determine the total asymmetrical fault current, which consists...
Using Kirchhoff's Voltage Law (KVL) to analyze this circuit helps determine the total asymmetrical fault current, which consists...
102