Four-wave mixing (FWM) is a non-linear optical process where two other waves are produced by the interaction of two wavelengths. Four-wave mixing can take place in any kind of material.
The principal planes are two hypothetical planes found in a lens system at which all the refraction is deemed to occur. The position of the principal planes are fixed and do not depend upon the position of the object
Radiation is a phenomenon wherein energy is propagated and emitted in the form of electromagnetic waves. Radiation consists of different types of waves - water waves, sound waves, light waves, and heat waves.
Visible spectrum, radio waves, ultraviolet rays, x-rays, gamma-rays, microwaves and infrared light are various electromagnetic radiations that belong to the electromagnetic spectrum.
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.
Refraction is a phenomenon that happens when waves passing from one transparent medium to another bend at the boundary between the two mediums.
By Ben Arnold
19 Sep 2014
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.
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.
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.
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.