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What is a Focal Point?

A focal point is a common point on the principal axis where all the light rays starting from the object converge.

5 Aug 2014

M2value is a parameter used to determine the beam quality of the laser beam. M2may be derived by dividing the beam parameter product (BPP) of an actual optic beam by the BPP of an ideal Gaussian beam at the same wavelength.

5 Aug 2014

How are Ballast Resistors Used in Laser Applications?

A ballast resistor is used for maintaining a constant current flowing through it, irrespective of the variations in the applied voltage or rest of the circuit. These resistors consist of a resistive element whose resistance increases with temperature.

5 Aug 2014

An Introduction to Optical Harmonics

Non-linear crystals are the materials in which dielectric polarization exhibits a non-linear response with respect to the electric field of the light.

5 Aug 2014

The Twyman Green Interferometer

The Twyman-Green interferometer is an instrument for testing optical components such as lenses and prisms. It was invented and patented by English electrical engineer Frank Twyman and English chemist Arthur Green in 1916.

4 Aug 2014

$The Diffraction Limits in Optical Microscopy$

The Diffraction Limits in Optical Microscopy

The optical microscope, also called the light microscope, is the oldest type of microscope which uses visible light and lenses in order to magnify images of very small samples. It is a standard tool frequently used within the fields of life and material science.

4 Aug 2014