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What is Transparency?

In optics, transparency, also referred to as pellucidity or diaphaneity, is the physical property of allowing light to pass via the material without being scattered.

19 Sep 2014

Beam divergence of an electromagnetic beam is defined as a measure of increase in laser beam diameter or radius with respect to the distance from an antenna aperture or optical aperture through which the beam emerges.

19 Sep 2014

Axicon Lenses and their Application

The axicon lens is a specialized lens that bears a conical surface. The axicon lens images a point source as a line along the optic axis.

19 Sep 2014

Meniscus Lens and Their Application

Meniscus lens is a lens having two spherical curved surfaces, convex on one side and concave on the other side. It is thicker at the center than at the edges. The lens provides a smaller beam diameter in order to reduce the beam waste and spherical aberration.

19 Sep 2014

Aiming Beam and Coaxial Laser Beam

An aiming beam is a laser beam (or any other light source) which is used as a light for guiding.

19 Sep 2014

Measuring the Autocorrelation of Spectral Components

Autocorrelator is a tool used for measuring the autocorrelation of spectral components and optical beam intensity by investigating the variable difference is an optical path of the beam.

19 Sep 2014

What is a Fluorescent Lamp?

Fluorescent lamps are essentially cylindrical glass tubes that are coated with phosphorus and filled with a noble gas. They also contain a small amount of mercury inside. Conventionally, these lamps are shaped as hollow cylinders.

19 Sep 2014

Neutral Density Filter - Definition and Properties

A neutral density filter is a semi-transparent glass filter used in front of a camera lens to reduce or vary the intensity of incoming light without affecting the color rendition.

18 Sep 2014