PRECISION INSTRUMENT BASED ON LASER

Introduction:

Light Amplification by Stimulated Emission of Radiation”.

  Laser metrology

  Laser telemetric system

  Laser and led based distance measuring instruments

  Scanning laser gauge

  Photodiode array imaging

  Diffraction pattern technique

  Laser triangulation sensors

  Two frequency laser interferometer

  Gauge wide diameter from the diffraction pattern formed in a laser.

Principle of laser:

The principle involved in laser is when the photon emitted during stimulated emission has the same energy, phase and frequency as the incident photon.

 Interferometry

 Uses laser in Interferometry

Laser Interferometry:

Two frequency laser source

Optical elements:

Beam splitters Beam benders Retro reflectors.

Laser heads measuring receiver

Measurement display

Types of AC Laser interferometer (ACLI)

Standard interferometer

Single beam Interferometry

Laser interferometer:

  AC laser interferometer

Other types of interferometers:

Dual frequency laser interferometer Twyman-Green Interferometer.

Applications:

  Linear instruments

  Angular measurements

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