Laser Distance Measurer: Difference between revisions
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Added basic details about the setup |
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Team members: Arya Chowdhury, Liu Sijin, Jonathan Wong | Team members: Arya Chowdhury, Liu Sijin, Jonathan Wong | ||
This project aims to build a laser interferometer that measures short distances (i.e., within a room). | |||
Components: | Components: | ||
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* Photodiode detector | * Photodiode detector | ||
* Amplifier | * Amplifier | ||
* Arduino board | * (Optional - Arduino board) | ||
Theory / Principle: | |||
Light emitted from a laser can be used to measure distances via phase shift detection. Our setup consists of a laser diode (which serves as a light source) with a given frequency (or wavelength) and amplitude. The reflection of the light off a surface serves as a phase shift operation on the incident light. Hence, if we compare the incident light wave to the reflected light wave, we can meausre such a phase shift and therefore calculate the distance. | |||
The detector consists of a photodiode to receive the reflecting light and a circuit to power the photodiode and output the signal. By supplying the dector with a certain voltage, we can construct the circuit as the below diagram and measure the signal via the difference in voltage. | |||
[circuit diagram] | |||
Latest revision as of 10:58, 14 March 2025
Team members: Arya Chowdhury, Liu Sijin, Jonathan Wong
This project aims to build a laser interferometer that measures short distances (i.e., within a room).
Components:
- Laser diode (source)
- Function generator
- Band pass filter
- Photodiode detector
- Amplifier
- (Optional - Arduino board)
Theory / Principle: Light emitted from a laser can be used to measure distances via phase shift detection. Our setup consists of a laser diode (which serves as a light source) with a given frequency (or wavelength) and amplitude. The reflection of the light off a surface serves as a phase shift operation on the incident light. Hence, if we compare the incident light wave to the reflected light wave, we can meausre such a phase shift and therefore calculate the distance.
The detector consists of a photodiode to receive the reflecting light and a circuit to power the photodiode and output the signal. By supplying the dector with a certain voltage, we can construct the circuit as the below diagram and measure the signal via the difference in voltage.
[circuit diagram]
