Photonics Dictionary: A

Clear All Filters x Targets x A x
ablation -> laser ablation

Laser ablation is a process that involves the removal or erosion of material from a target surface using laser energy. This technique is widely used in various scientific, industrial, and medical...

alignment telescope

An optical tooling instrument consisting of an objective lens, a focusing lens, an optical micrometer, a reticle and an eyepiece. The alignment telescope projects a precise line of sight to which a...

angle-tracking system

A system in which a sequence of direct measurements of the target position is fed into a tracking filter that may produce refined estimates of past, present and future target positions.

angular tracking

A laser radar application in which a sequence of direct measurements of target position is fed into a tracking filter to produce refined estimates of both present and future target positions.

anticathode -> x-ray tube target

Also known as an anticathode. An electrode or electrode section that is focused upon by an electron beam and that emits x-rays.

apparent contrast

The perceived brightness difference between light and dark areas on a target.

aptamer

An aptamer is a short, single-stranded DNA or RNA molecule that can bind to a specific target molecule with high affinity and specificity. Aptamers are often referred to as chemical antibodies due to...

atomic absorption spectrometer

An atomic absorption spectrometer (AAS) is an analytical instrument used to determine the concentration of specific chemical elements in a sample by measuring the absorption of light at...

ATR

attenuated total reflectance; automatic target recognition

attosecond-pump attosecond-probe spectroscopy

Attosecond-pump attosecond-probe spectroscopy (APAP) is an advanced technique in ultrafast spectroscopy that allows scientists to study the dynamics of electronic processes occurring on extremely...

autocollimation

Technique of projecting an illuminated target at infinity and receiving the target image after reflection from a flat mirror surface.

Photonics DictionaryA

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