Optics / Photonics 101

What is a Lumen?

A lumen is as a unit of measurement indicating the level of brightness emitted from lighting products such as bulbs and tubes, and natural light.

22 Sep 2014

Telecentric Lenses and Their Application

Telecentric lens is a compound lens used in imaging systems to make objects appear to be the same size independent of their location in space.

19 Sep 2014

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

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

What is an LED?

Light emitting diodes (LED) maybe defined as a semiconductor device that generates light by using the solid sate electronics.

18 Sep 2014

What is a Wavenumber?

Wavenumber is defined as the number of complete wave cycles per unit length of a linear space. It can also be referred to as the spatial frequency of the waves represented in radians per unit distance, or cycles per unit distance.

16 Sep 2014

What is a Prism?

A prism is a transparent geometric optical object with a minimum of two polished plane faces inclined relative to each other, from which light is reflected or through which light is refracted.

12 Sep 2014

What is a Periscope?

A periscope can be defined as an optical instrument that allows the viewing of objects that are not in the direct life of vision. Periscopes prove to be of great help to submariners to have a view of the outside view.

11 Sep 2014