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BAE Systems Sensor Solutions - Fairchild - Thermal Imaging Solutions 4/24 LB
modulation Dictionary Terms

continuous wave
Continuous wave (CW) refers to a type of signal or transmission where the signal is constant and does not vary with time. In...
Z-axis modulation
The intensity regulation of a cathode-ray tube by alteration of the grid-cathode voltage.
Mach-Zehnder interferometer
A Mach-Zehnder interferometer is an optical device used to measure the phase difference between two collimated beams of...
lock-in amplifier
A lock-in amplifier is a specialized electronic instrument used to extract and measure small signals embedded in noise or...
pulse code modulation
System of information coding in which the signal is sampled 8000 times per second and the samples quantized by referring...
power modulation
Power modulation refers to the intentional variation of power levels in a signal, often in the context of electronic...
electromagnetic lens
An electron lens consisting of a homogeneous axial electric field and a magnetic field used in high-quality image tubes for...
companding
A deliberately nonlinear amplitude modulation that strengthens weak signals and reduces strong signals for transmission.
Pockels
In optics, the Pockels effect refers to the phenomenon where the refractive index of a material changes in response to an...
photonic integrated circuit
A photonic integrated circuit (PIC) is a compact and integrated device that incorporates multiple photonic components and...
optical transform image modulation
A technique for detecting and measuring atmospheric pollution, in which an oscillating mirror directs half the incoming...
noise equivalent power
At a given modulation frequency, wavelength, and for a given effective noise bandwidth, the radiant power that produces a...
cathode modulation
The amplitude modulation through the application of modulating voltage to the cathode circuit.
electro-optic modulator
An electro-optic modulator (EOM) is a device used to modulate the amplitude, phase, or polarization of light waves using an...
fiber optic sensor
A fiber optic sensor is a device that uses optical fibers to detect and measure physical, chemical, biological, or...
pulse counter detector
A device designed to detect frequency-modulated signals by forming a unidirectional pulse from each sine wave. The direct...
diffuse modulation transfer function
Modulation transfer function of an optical element when used for transporting images from a lambertian source such as...
acousto-optic modulators and deflectors
An acousto-optic modulator (AOM) is a device that utilizes the interaction between sound waves and light waves to modulate...
modulation frequency
Rate at which optical radiation or a signal is varied through the use of a mechanical or electronic chopper. Also called...
Kerr effect
The Kerr effect, named after the physicist John Kerr who first observed it in 1875, is a nonlinear optical phenomenon where...
FMCW lidar
FMCW lidar stands for frequency-modulated continuous wave lidar. It is a type of lidar (light detection and ranging)...
photobiomodulation
A light therapy that utilizes nonionizing light sources, including lasers, LEDs, and broadband light, in the visible and...
quantizer
A device with a limited number of possible output values (sometimes able to be selected) that can translate an incoming...
nonlinear optical materials
Nonlinear optical materials are substances that exhibit optical properties that are not linearly proportional to the...
ultrasonic stroboscope
A light-interference device whose excitation is determined by the modulation of a light beam by an ultrasonic field.
velocity modulation laser spectroscopy
A method of measuring negatively charged phase ions using a color-center or lead-salt diode laser.
modulator
A modulator is a device or component that modifies a carrier signal in order to encode information for transmission over a...
electroreflectance spectroscopy
A type of electromodulation that measures changes in spectral reflectance.
microwave phototube
A device designed to detect microwave modulation and to mix modulated and unmodulated laser beams. It consists of a...
modulation transfer function analysis/measurement equipment
MTF analysis/measurement equipment refers to instruments and tools used to measure and analyze the modulation transfer...
modulation spectroscopy
A method of spectral analysis in which some property of the sample is varied and the corresponding change is measured. The...
laser optics
Laser optics refers to a broad category of optical components and systems designed for manipulating and controlling laser...
femtosecond laser
A femtosecond laser is a type of laser that emits ultrashort pulses of light with durations on the order of femtoseconds,...
acousto-optic modulation
The altering of lightwaves by acoustic waves in a solid medium.
optofluidics
Optofluidics is an interdisciplinary field that combines principles from optics and fluidics to create devices and systems...
definition test object
A chart, either printed on paper or prepared photographically on glass plates or film, that consists of 3-bar resolution...
optical gate
An optical gate typically refers to a device or system that controls the transmission of light, allowing it to pass through...
self-phase modulation
Self-phase modulation (SPM) is a nonlinear optical phenomenon that occurs when an intense laser beam passes through a...
optical transfer function
The function that characterizes the quality of an optical system by denoting the modulation and spatial phase shift of the...
data compression
A method of storing digital data using techniques that consume less memory space than basic methods do. See differential...
linear element
A device for which the output electric field is linearly proportional to the input electric field, and no new wavelengths or...
optical design software
Optical design software refers to specialized computer programs used by optical engineers, physicists, and designers to...
modulation bandwidth
The highest frequency at which a laser diode can be driven and still be modulated acceptably that further results in the...
laser diode module
A laser diode module is a compact device that incorporates a laser diode, optics, and often other components into a single...
electromodulation spectroscopy
A type of modulation spectroscopy that measures spectral reflectance or transmittance changes induced by applying a...
intensity modulation
The process in which the electron beam of a cathode-ray tube varies in intensity in accordance with the magnitude of the...
electron-beam film scanning
The method by which photographic film is scanned by an electron beam. One technique uses the uniform light of a television...
sine wave object
An object that has a sinusoidal variation of luminance. Its image will have a sinusoidal variation of illuminance and the...
spatial light modulator
A spatial light modulator (SLM) is an optical device that modulates or manipulates the amplitude, phase, or polarization of...
liquid crystal light valve
A liquid crystal light valve (LCLV), also known as a spatial light modulator (SLM), is an optical device that modulates the...
supercontinuum
Supercontinuum refers to a broad spectrum of light that spans a wide range of wavelengths, typically from the visible to the...
modulation transfer function
Also called sine wave response and contrast transfer function. The modulation transfer function is the ratio of the...
gain-switching
Gain-switching is a technique used in lasers to generate short pulses of light by modulating the gain of the laser medium....
metasurfaces
Metasurfaces are two-dimensional arrays of subwavelength-scale artificial structures, often referred to as meta-atoms or...
phase-modulated sensor
A phase-modulated sensor is a type of sensor that uses modulation of the phase of a signal to measure changes in a physical...
Pockels cell
A device containing an electro-optic crystal and using the Pockels effect. A voltage applied across the crystal generates...
fiber Bragg grating
A fiber Bragg grating (FBG) is a type of optical filter that is inscribed or "written" into the core of an optical fiber. It...
moiré deflectometry
An optical interference technique widely utilized as a method of nondestructive testing when determining the ray deflection...
differential pulse code modulation
A method of coding image data by storing in memory only differences in brightness of each pixel from that of its nearest...
phase
In optics and photonics, "phase" refers to a property of electromagnetic waves, such as light, that describes the position...
nonlinear optics
Nonlinear optics is a branch of optics that studies the optical phenomena that occur when intense light interacts with a...
modulated zone plate
A zone plate produced by a computer and having a binary structure that can be etched into a chromium or quartz layer. It...
photoreflectance
A noncontact form of electromodulation in which modulation of the electric field is caused by photo-excited electron-hole...
modulation
In general, changes in one oscillation signal caused by another, such as amplitude or frequency modulation in radio which...
optoelectronics
Optoelectronics is a branch of electronics that focuses on the study and application of devices and systems that use light...
digital signal processing
Digital signal processing (DSP) refers to the manipulation and analysis of signals, which are representations of physical...

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