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How to measure distance from an object? 


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Distance from an object can be measured using various methods. One approach involves using a distance measurement apparatus that transmits an optical signal to the target object and detects the reflected signal. The distance is then calculated based on the number of integral wavelengths and phases of decimal wavelengths . Another method utilizes a distance measuring arrangement that combines monochromatic and interference-capable light beams into a measurement beam. The measurement beam is split into a reference beam and a signal beam, and the phase of the signal beam is periodically modulated. The distance is determined based on the interference pattern between the reference and signal beams . Additionally, a distance measuring device can detect light reflected by an object, generate an electrical signal, and calculate the distance based on the magnitude of the electrical signal . Another device involves a clamping block with a measuring hole and a measuring rod, allowing for quick and accurate distance measurement between two objects .

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The paper describes a distance measuring arrangement that uses light beams of different wavelengths and a phase modulator to determine the distance from an object.
The paper provides a distance measuring device that can measure the distance between two objects quickly and accurately. It involves using a clamping block with a measuring hole and a measuring rod of a dial indicator to obtain the distance between the objects.
The paper provides a method of measuring distance by detecting light reflected by an object, generating an electrical signal based on the detected light, and calculating the distance using the electrical signal.
The provided paper describes a distance measuring arrangement that uses light beams and a phase modulator to determine the distance from an object.
The paper describes a distance measurement apparatus that uses an optical signal transmitted to a target object and detects the reflected signal to calculate the distance between the object and the apparatus.

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