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PI Physik Instrumente - Microscope Stages MR ROS 11/24

Hamamatsu Corp. - Mid-Infrared LED 11/24 HP

8,726 terms

Photonics Dictionary

ROID

reconfigurable optical interconnect device

roll

In positioning, rotation about the line of sight or direction of travel.

rolled edge

Also known as a turned-down edge. A rapid change of curvature near the edge in a lens or prism surface.

rolling shutter artifacts

Rolling shutter artifacts are distortions or visual anomalies that can occur in images or videos captured by cameras with rolling shutter sensors. A rolling shutter is a type of image sensor that...

rolloff

A defect in the cleaved end face of an optical fiber in which a portion of the edge has broken away; the complement of lip.

ROM

read-only memory

Ronchi grating

A transparent plate ruled with black lines and equal, clear spaces. It is used as a multiple knife-edge for testing a concave mirror.

Ronchi test

More efficient than the Foucault knife-edge test, this test examines curved mirrors by using a transmission grating with 40 to 200 lines per inch in place of the knife-edge, and a section or slit of...

roof or roof-angle prism -> Amici prism

Also known as roof prism. A type of prism designed by G.B. Amici. It consists of a roof edge produced upon the long reflecting face of a right-angle prism. Used as an erecting system in elbow and...

root mean square

A statistical method of dealing with a series of values where each value is squared, the mean of these squares is calculated, and the square root of that mean is then taken.

root sum square

A statistical method of dealing with a series of values where each value is squared, the sum of these squares is calculated and the square root of that sum is then taken.

Ross lens

A corrective lens system that is placed near the focal plane of a Newtonian telescope to increase its effective field of view by correcting for coma formed by the telescope's paraboloidal mirror.

rotary actuator

A precision positioning device used to produce rotary motion.

rotary camera

A camera system used for microphotography that has a structure, such as a cylinder or surveyor belt, to rotate the documents to be recorded. The image is fixed relative to film motion and exposure is...

rotary laser

A structured light device using a rapidly rotating laser to project a beam of light that appears to the human eye as a continuous circle; used as a reference marker on walls or landscape for...

rotating hologram

A disc composed of a series of holographic optical elements that diffract light at various angles. When spinning, a raster scan may be generated.

rotating mirror scanner

Developed for use in military reconnaissance systems, it consists of a polygonal mirror, drive motor, interface between motor and mirror, and control electronics. Also used in broadband video...

rotating prism camera

A camera, with a rotating prism, that is capable of forming multiple exposures on a constantly moving strip of film.

rotating wedge

A circular optical wedge (prism of small refracting angle) mounted to be rotated in the path of light rays to divert the line of sight to a restricted degree.

rotational power stability

Ability of a laser to resist variations in output power caused when it is slowly rotated about its optical or symmetrical axis.

rotational transition

One of the types of change in the energy levels of molecules or atoms in a laser that can result in lasing action. Because the energy levels between rotational states are small, such lasing action is...

rouge

A very fine powdered ferric oxide used in polishing lenses.

roughening laser

A roughening laser is a laser-based surface modification technique aimed at altering the surface texture of a material to achieve specific properties such as enhanced adhesion, light diffusion, or...

roughing

A term used to describe a very coarse grinding process.

ROW

resonant optical waveguide

Rowland circle

The circle that contains the slit, grating and primary astigmatic focus of a concave diffraction grating.

Rowland ghosts

In spectroscopy, the false images arranged symmetrically on both sides of the true line and caused by irregularities in the ruling of diffraction gratings.

Rowland mounting

The mounting of a concave diffraction grating and a plate holder at the ends of a rigid bar. The ends follow separate straight tracks that intersect perpendicular to each other. The slit is located...

RPA

rotating polarizer assembly

RPD

radar planning device

rpm

revolutions per minute

rps

revolutions per second

RPT

retroreflective projection technology

RPV

remotely piloted vehicle

RQE

responsive quantum efficiency

RQI

Rayleigh quotient iteration

rapid rectilinear

RSPM

random spatial phase modulator

RSRE

Royal Signals and Radar Establishment

rss

root sum square

RSS

ray surfaces per second; reduced space symbology

real time; remote terminal; room temperature

RTE

radiative transfer equation

RTG

radioactive thermoelectric generator

RTS

real-time system

RTSP protocol

RTSP, or real-time streaming protocol, is a network control protocol designed for controlling streaming media servers. It is used for establishing and controlling media sessions between endpoints....

rub

A type of scratch.

ruby laser

The optically pumped, solid-state laser that uses sapphire as the host lattice and chromium as the active ion. The emission takes place in the red portion of the spectrum.

rugate

Bearing alternate ridges and grooves; corrugated. Said of some optical surfaces.

Rugate filters

A Rugate filter is a type of optical filter that is designed to have a continuously varying refractive index profile throughout its thickness, rather than the discrete layers found in traditional...

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