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Excelitas PCO GmbH - PCO.Edge 11-24 BIO MR

8,726 terms

Photonics Dictionary

numerical aperture

nanoampere

nadir

In a remote sensing system, nadir refers to the point on the ground located vertically below the center of the system. In astronomy, the nadir is the vertical direction that points towards the force...

NAED

normalized angle error detector

Nagel anomaloscope -> color perception test equipment

Equipment for testing an observer's color vision. Some tests require the identification or ordering of colored samples. The commercially available examples include: the Ishihara plates, on which...

NALM

nonlinear amplifying loop mirror

nano

An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as...

nanoimprint lithography

Nanoimprint lithography (NIL) is a nanolithography technique used for fabricating nanoscale patterns on a substrate. It is a high-resolution, high-throughput process that involves the mechanical...

nanoLED

An LED (light-emitting diode) is a semiconductor device that emits light when an electric current passes through it. LEDs are commonly used for lighting, displays, and indicators. A NanoLED is on the...

nanometer

A unit of length in the metric system equal to 10-9 meters. It formerly was called a millimicron.

nanoparticle

A small object that behaves as a whole unit or entity in terms of it's transport and it's properties, as opposed to an individual molecule which on it's own is not considered a nanoparticle.....

nanoparticle photonic resonator absorption microscopy

Nanoparticle photonic resonator absorption microscopy is a microscopy technique that combines the principles of photonic resonators and nanoparticle imaging to visualize and study biological samples...

nanophotonics

Nanophotonics is a branch of science and technology that explores the behavior of light on the nanometer scale, typically at dimensions smaller than the wavelength of light. It involves the study and...

nanoplasmonics

Nanoplasmonics is a branch of nanophotonics that focuses on the study and manipulation of optical phenomena at the nanoscale using plasmonic materials and structures. Plasmonics deals with the...

nanopositioning

Nanopositioning refers to the precise and controlled movement or manipulation of objects or components at the nanometer scale. This technology enables the positioning of objects with extremely high...

nanostructured glass

A unique glass made up of nano-structured materials to create millimeter sized monolithic glass space-variant polarization converters which ultimately alter the way light propagates through and is...

nanotechnology

The use of atoms, molecules and molecular-scale structures to enhance existing technology and develop new materials and devices. The goal of this technology is to manipulate atomic and molecular...

nanotube

A nanotube, also known as a nanotubule or simply a tube-like structure, is a nanoscale cylindrical structure composed of various materials, including carbon, boron nitride, or other compounds....

NAPM

National Association of Photographic Manufacturers

narcissus

A defect in infrared systems that appears as a dark circular area on a displayed image, caused by radiation reflecting into a detector. It can be reduced by low-reflective coatings or by altering the...

narrow bandpass filter -> interference filter

A filter that controls the spectral composition of transmitted energy partially by the effects of interference. Frequently, these filters are made up of thin layers of metals and dielectrics,...

narrow-angle dark-field illumination

An imaging system designed to highlight small deviations in a planar reflective object such as a mirror. The system can be used to detect minute flaws or to image faint marks that are made in the...

narrowband pyrometer

An optical pyrometer that is equipped with a narrow bandpass filter to transmit a limited number of wavelengths to the sensing device.

NAS

National Academy of Science

NASA

National Aeronautics and Space Administration

NASDA

National Space Development Agency (Japan)

National Television Systems Committee

The code used to describe the United States system of color telecasting.

native fluorescence

The light emitted from tissues without the use of fluorescent dyes as markers. Because cancerous tissues and normal tissues have differing emission spectra, the native fluorescence can be used to...

narrowband

NBM

narrowband mirror

numerical control

NCGA

National Computer Graphics Association

NCID

National Council for Industrial Defense

NCPM

noncritical phase matching

NCTA

National Cable Television Association

NCTR

noncooperative target recognition

neutral density

Nd:glass -> neodymium glass

Glass containing small quantities of neodymium oxide that is used as a filter plate in color television or as a lasing medium (Nd:glass) in solid-state lasers.

Nd:YAG -> neodymium:YAG

Literally, neodymium:yttrium-aluminum-garnet. A cylindrical rod of yttrium-aluminum-garnet doped with neodymium that is the active medium of the Nd:YAG laser, a highly serviceable solid-state device...

Nd:YAG laser

Nd:YAG laser refers to a solid-state laser that utilizes neodymium-doped yttrium aluminum garnet (Nd:Y3Al5O12) as the gain medium. This type of laser emits light at a wavelength of 1064 nm in the...

NDE

nondestructive evaluation

NDIR

nondispersive infrared

NDRO

nondestructive readout

NDT

nondestructive testing

NEA

negative-electron affinity; noise equivalent angle

near point of eye

The closest distance to which the eye can focus on an object, normally taken to be 250 mm. The near point varies with age.

near ultraviolet

The longest wavelengths of the ultraviolet region, nominally 300 to 400 nm.

near-eye display

A near-eye display (NED) is a type of display technology designed to be positioned close to the user's eyes, typically within a few centimeters. This technology is commonly used in applications such...

near-field diffraction -> Fresnel diffraction

1. Also known as near-field diffraction. The field of radiation sent through an aperture in an absorbing screen at large distances as compared with the wavelength and the dimensions of the aperture,...

near-field holography

A lithography method that allows the transfer of fine-pitch gratings from a phase mask into photoresist. The exposure takes place with the light coming under an oblique angle to the mask. The...

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Photonics Dictionary

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