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Material that scatters light in optics
In optics, a diffuser (also called a light diffuser or optical diffuser) is any material that diffuses or scatters light in some manner to transmit soft
Diffuser_(optics)
Topics referred to by the same term
Look up diffuser or diffusers in Wiktionary, the free dictionary. Diffuser may refer to: Diffuser (automotive), a shaped section of a car's underbody
Diffuser
Branch of functional near infra-red spectrosocpy
Time-domain diffuse optics or time-resolved functional near-infrared spectroscopy is a branch of functional near-Infrared spectroscopy which deals with
Time-domain_diffuse_optics
Meteorological condition
Wiktionary, the free dictionary. Diffuse reflection Forward scatter Light scattering by particles Diffuser (optics) Gloom June Gloom Hard and soft light
Overcast
Use of light for medical investigation
Applied Optics. 46 (23): 5805–5822. Bibcode:2007ApOpt..46.5805F. doi:10.1364/ao.46.005805. PMID 17694130. Durduran, T; et al. (2010). "Diffuse optics for
Medical_optical_imaging
photon transport in biological tissue Time-domain diffuse optics Durduran, T; et al. (2010). "Diffuse optics for tissue monitoring and tomography". Rep. Prog
Diffuse_optical_imaging
Branch of physics that studies light
Optics is the branch of physics that studies the behaviour, manipulation, and detection of electromagnetic radiation, including its interactions with matter
Optics
Solar radiation reaching the Earth's surface
described for spherical particles by the Mie theory.) The laws of geometric optics begin to apply at higher ratios. Daily at any global venue experiencing
Diffuse_sky_radiation
Medical diagnostic method
therapy outcome. It is an application of diffuse optics, which studies light propagation in strongly diffusive media, such as biological tissues, working
Diffuse_optical_mammography
Optical technique for monitoring brain activity
Franceschini, M. A. (2020). "Diffuse correlation spectroscopy measurements of blood flow using 1064 nm light". Journal of Biomedical Optics. 25 (9) 097003. Bibcode:2020JBO
Functional near-infrared spectroscopy
Functional_near-infrared_spectroscopy
Light-conducting fiber
concerned with the design and application of optical fibers is known as fiber optics. The term was coined by Indian-American physicist Narinder Singh Kapany
Optical_fiber
tomography Diffuse Infrared Background Experiment Diffuse element method Diffuse reflection Diffuse sky radiation Diffuser (optics) Diffusing-wave spectroscopy
Index_of_physics_articles_(D)
Technical applications of optics
Photonics is a branch of optics that involves the application of generation, detection, and manipulation of light in the form of photons through emission
Photonics
Computational imaging technique
Multispectral and hyperspectral imaging Infrared imaging spectroscopy Diffuse optics and imaging through scattering media Time-resolved and life-time microscopy
Single-pixel_imaging
Medical imaging and optical technique
(2011-11-28). "Direct measurement of tissue blood flow and metabolism with diffuse optics". Philosophical Transactions. Series A, Mathematical, Physical, and
Diffuse correlation spectrometry
Diffuse_correlation_spectrometry
Optical Phenomenon
In optics, Lambert's cosine law says that the observed radiant intensity or luminous intensity from an ideal diffusely reflecting surface or ideal diffuse
Lambert's_cosine_law
"Bouncing back" of waves at an interface
incident light. This is an important principle in the field of thin-film optics. Specular reflection forms images. Reflection from a flat surface forms
Reflection_(physics)
Shiny visual appearance of an object
categories of visual appearance related to the perception of regular or diffuse reflection and transmission of light have been organized under the concept
Gloss_(optics)
X-ray optics design that mimics the structure of lobster eyes
Lobster-eye optics are a biomimetic design, based on the structure of the eyes of a lobster with an ultra-wide field of view, used in X-ray optics. This configuration
Lobster-eye_optics
Signalling device to control competing flows of traffic
developed. Signals such as the 3M High Visibility Signal utilise light-diffusing optics and a Fresnel lens to create the signal indication. The light from
Traffic_light
Box for photographing an object without casting shadows
daylight (5000 K to 6500 K) unless the lighting indicates otherwise. Diffuser (optics) Lightbox Softbox Harnang, Forfatter Harald (2018-03-01). "Produktfotografering"
Light_tent
Scientific field of study
most notable innovations under Islamic scholarship were in the field of optics and vision, which came from the works of many scientists like Ibn Sahl,
Physics
American physicist
in Biophotonics, especially development and clinical application of diffuse optics for noninvasive imaging and monitoring of biological tissues, and in
Arjun_Yodh
Spectroscopy technique
possible angles, referred to as "diffuse illumination". In 1931, Paul Kubelka (with Franz Munk) published "An article on the optics of paint", the contents of
Diffuse reflectance spectroscopy
Diffuse_reflectance_spectroscopy
Series of lines in atomic spectra
The diffuse series is a series of spectral lines in the atomic emission spectrum caused when electrons jump between the lowest p orbital and d orbitals
Diffuse_series
Reflection which reverses the direction of a wave, particle, or signal
medium (Brillouin scattering and Raman scattering), important in fiber optics, see below; Elastic collisions between accelerated ions and a sample (Rutherford
Backscatter
Second order partial differential equation
photon diffusion as explained by the equation is used in diffuse optical tomography. Diffuse Optics Lab at University of Pennsylvania, Philadelphia, USA
Photon_diffusion_equation
Property of an object or substance that is impervious to light
descriptions of opacity Molar absorptivity Reflection (physics) Gloss (optics) Cesia (visual appearance) Scattering theory Transparency and translucency
Opacity
Mathematical method used in optics and acoustics
The transfer-matrix method is a method used in optics and acoustics to analyze the propagation of electromagnetic or acoustic waves through a stratified
Transfer-matrix method (optics)
Transfer-matrix_method_(optics)
Ability of any image-forming device to distinguish small details of an object
thereby making it a major determinant of image resolution. It is used in optics applied to light waves, in antenna theory applied to radio waves, and in
Angular_resolution
Recording to reproduce a three-dimensional light field
1-2021 Optics and photonics. Holography. Part 1. Core terms and definitions. Classification". Retrieved 13 July 2026. "GOST R 59321.2-2021 Optics and photonics
Holography
Modelling the appearance of paint coatings
In optics, the Kubelka–Munk theory devised by Paul Kubelka and Franz Munk, is a fundamental approach to modelling the appearance of paint films. As published
Kubelka–Munk_theory
Biomedical engineer
biomedical engineer whose research has focused on biomedical optics, optical tomography, and diffuse optical tomography for medical imaging. He is a professor
Andreas_H._Hielscher
Mirror-like wave reflection
from a non-absorbing powder, such as plaster, can be a nearly perfect diffuser, whereas polished metallic objects can specularly reflect light very efficiently
Specular_reflection
Study of light interaction with water and submerged materials
Ocean optics is the study of how light interacts with water and the materials in water. Although research often focuses on the sea, the field broadly includes
Ocean_optics
Medical intervention
Yukio (2016-07-13). "Overview of diffuse optical tomography and its clinical applications". Journal of Biomedical Optics. 21 (9) 091312. Bibcode:2016JBO
Optical_tomography
Ratio of a celestial body's brightness to that of a Lambertian ideal
light paths and is not a phase angle in its normal meaning in optics or electronics.) Diffuse scattering implies that radiation is reflected isotropically
Geometric_albedo
Optical phenomenon
reflection haze. As colour and haze are both components of scattered light (diffuse reflectance) they must be separated so that only the haze value is quantified;
Haze_(optics)
Collection of focus points made by extended diverging light rays
In optics, the image of an object is defined as the collection of focus points of light rays coming from the object. A real image is the collection of
Virtual_image
Device used to determine location of an object
retro-reflective, and proximity-sensing (diffused). A self-contained photoelectric sensor contains the optics, along with the electronics. It requires
Photoelectric_sensor
Glass with roughened surface
from ornamentation on windows and table glassware to scientific uses in optics and laboratory glassware. In photography, a sheet of ground glass is used
Ground_glass
Shielding an object from view using materials made to redirect light
object seemingly invisible. Metamaterial cloaking, based on transformation optics, describes the process of shielding something from view by controlling electromagnetic
Metamaterial_cloaking
Physical property of allowing light
In the field of optics, transparency (also called pellucidity or diaphaneity) is the physical property of allowing light to pass through the material without
Transparency_and_translucency
Model in physics
developed by Michael Oren and Shree K. Nayar, is a reflectivity model for diffuse reflection from rough surfaces. It has been shown to accurately predict
Oren–Nayar_reflectance_model
Architectural structures that transmit or distribute light
of up to almost 99.5 percent. At the end point (the point of use), a diffuser spreads the light into the room. The first full-scale passive horizontal
Light_tube
equipment to test the quality of optics, especially concave mirrors. [1]. A "Ronchi tester" consists of: A light source A diffuser A Ronchi grating A Ronchi
Ronchi_test
Device that emits light via optical amplification
13, 2009). Handbook of Optics, Third Edition Volume V: Atmospheric Optics, Modulators, Fiber Optics, X-Ray and Neutron Optics. McGraw Hill Professional
Laser
Scientist and university professor
imaging, confocal Raman and surface-enhanced Raman spectroscopy, and diffuse optics for clinical imaging and biosensing. She also co-founded two MedTech
Malini_Olivo
Rare optical phenomenon
2007-04-22. Les Cowley. "South Pole Halos - Anthelic View". Atmospheric Optics. Archived from the original on 2015-09-23. Retrieved 2007-04-22. (including
Anthelion
Light scattering by small particles
Herwig; Kriss, Michael A.; Schmit, Joanna; Weber, Marvin J. (eds.). The Optics Encyclopedia (1 ed.). Wiley. doi:10.1002/9783527600441.oe004. ISBN 978-3-527-40320-2
Rayleigh_scattering
Optical component
direction of light are minimized. An integrating sphere may be thought of as a diffuser which preserves power but destroys spatial information. It is typically
Integrating_sphere
Template placed in front of a light source to shape the emitted light
reflection in a metallic or glass surface, by placing it in front of the diffuser for a hard-edged dark reflection, or behind, to produce a soft outline
Gobo_(lighting)
French physicist (1885–1959)
12 August 1885 – 31 October 1959) was a French physicist specialising in optics. Cabannes studied at the Lycée de Nice and entered the École Normale Supérieure
Jean_Cabannes
Academic journal
subtopics including chemometrics, chemical imaging, fiber optics, instrumentation and diffuse reflection. Its editor-in-chief is Roger Meder. The journal
Journal of Near Infrared Spectroscopy
Journal_of_Near_Infrared_Spectroscopy
Gradual loss of flux intensity through a medium
attenuation is an exponential function of the path length through the medium. In optics and in chemical spectroscopy, this is known as the Beer–Lambert law. In
Attenuation
Method of eye examination
SLO. Adaptive optics scanning laser ophthalmoscopy (AOSLO) is a technique used to measure living retinal cells. It utilizes adaptive optics to remove optical
Scanning_laser_ophthalmoscopy
Microchip manipulating light instead of electricity
applications in Generative AI and AI data centers. This is seen in co-packaged optics, where PICs are placed on the same substrate as the main processor, such
Photonic_integrated_circuit
Motor vehicle
matte-white film wrapping and white-foiled rear spoiler, rear diffuser in carbon fiber-optics and the dark wheels, suede-trimmed steering wheel, Recaro sport
Mazda_MX-5_(NC)
Optics Express. 15 (23): 15250–15259. arXiv:0711.1219. Bibcode:2007OExpr..1515250B. doi:10.1364/OE.15.015250. PMID 19550809. S2CID 5753232. Diffusing
Diffusing-wave_spectroscopy
Quantification of vision used in optics
categories of visual appearance related to the perception of regular or diffuse reflection and transmission of light have been organized under the concept
Distinctness_of_image
Device for examining the eye
survey illumination is produced by inserting a ground glass screen or diffuser in the illuminating path. "Wide beam" illumination is the only type that
Slit_lamp
Nonlinear optical effect
ISBN 978-0-387-34443-0. Pochi Yeh (1993). Introduction to photorefractive nonlinear optics. Wiley series in pure and applied optics. ISBN 0-471-58692-7.
Photorefractive_effect
Measurement method using interference of waves
an important investigative technique in the fields of astronomy, fiber optics, engineering, metrology, optical metrology, oceanography, seismology, spectroscopy
Interferometry
Fluoropolymer which has the highest diffuse reflectance of any known material
"Long-term calibration monitoring of Spectralon diffusers BRDF in the air-ultraviolet". Applied Optics. 46 (32): 7893. Bibcode:2007ApOpt..46.7892G. doi:10
Spectralon
Computer graphics technique
seeks to render images in a way that models the lights and surfaces with optics in the real world. It is often referred to as "Physically Based Lighting"
Physically_based_rendering
Function of four real variables that defines how light is reflected at an opaque surface
from a source is reflected off an opaque surface. It is employed in the optics of real-world light, in computer graphics algorithms, and in computer vision
Bidirectional reflectance distribution function
Bidirectional_reflectance_distribution_function
between them. Since fiber optics transmit data via light the light can cross this gap, but spreads out and is weakened and diffused when it does so. The light
Gap_loss
Light measurement tool
spectroradiometric system are as follows: Input optics that gather the electromagnetic radiation from the source (Diffusers, Lenses, Fiber optic light guides) An
Spectroradiometer
NASA space program
degree against a background which is only 3 K (−270.15 °C; −454.27 °F). The optics in the instrument package were placed near the top of the dewar flask which
ARCADE
Device to replace a failed light
optical assembly. Since signal and navigational lights use sophisticated optics to focus the beam, lampchangers are designed to position the new bulb at
Automatic_lamp_changer
Type of electronic noise
Nd = dark current (electrons/pixel/sec), Nr = read noise (electrons). In optics, shot noise describes the fluctuations of the number of photons detected
Shot_noise
Property of waves that can oscillate with more than one orientation
angular momentum of light Optics Depolarizer (optics) Fluorescence anisotropy Glan–Taylor prism Kerr effect Nicol prism Physical optics Pockels effect Polarization
Polarization_(waves)
Method of specimen illumination used in optical microscopy
be used to diffuse the filament image, including reducing power to the light source or using an opal glass bulb or an opal glass diffuser between the
Köhler_illumination
Photometric measure
luminance of about 1.6×109 cd/m2 at noon. Luminance is invariant in geometric optics. This means that for an ideal optical system, the luminance at the output
Luminance
Form of illumination used in liquid crystal displays
source according to a diffusion equation. The diffused light then travels to either side of the diffuser; the front faces the actual LCD panel, the back
Backlight
Optical component
chart Chris Plicht. "Ronchi, Vasco (1897–1988)". Plichts Website. "Testing and Targets". Edmund Optics Imaging Resource Guide. Retrieved October 2, 2018.
Ronchi_ruling
sunlight give more even illumination. Alternatively, a ground or opal glass diffuser can be used to homogenize the light source, but this will cause a significant
Critical_illumination
Atmospheric optical phenomenon
Formation". Atmospheric Optics. Retrieved 29 September 2025. Cowley, Les. "Is it a 46° halo or a supra/infralateral arc?". Atmospheric Optics. Retrieved 29 September
46°_halo
Range of physical processes in physics
particle diameter to wavelength more than about 10, the laws of geometric optics are mostly sufficient to describe the interaction of light with the particle
Scattering
Visual appearance of specular reflections
"Specular" is defined in optics as Optics. (of reflected light) directed, as from a smooth, polished surface (opposed to diffuse ). A specular surface is
Specularity
Model for determining radiant energy reflected off diffuse surfaces
Lambertian reflectance is the property that defines an ideal "matte" or diffusely reflecting surface. The apparent brightness of a Lambertian surface to
Lambertian_reflectance
Scattering of light by tiny particles in a colloidal suspension
wavelengths are transmitted more, while the shorter wavelengths are more diffusely reflected via scattering. The Tyndall effect is seen when light-scattering
Tyndall_effect
Danish physicist
physicist. He is currently a professor and the leader for the Centre for Nano Optics at the University of Southern Denmark. Bozhevolnyi was raised in the village
Sergey_Bozhevolnyi
Technique for creating microscopic structures
thermal treatments has also been shown, enabling 3D printing of glass micro-optics on the tips of optical fibers without causing damage to the optical fiber
Multiphoton_lithography
reflectance is the reflectance of a surface under direct illumination (with no diffuse component). Directional-hemispherical reflectance is the integral of the
Directional-hemispherical reflectance
Directional-hemispherical_reflectance
Topics referred to by the same term
American English, of a surface: having a non-glossy finish; see gloss (optics) Matte display, an electronic display with a matte surface Matte (metallurgy)
Matte
Measure of the "spread" of light in an optical system
angle. It corresponds to the beam parameter product (BPP) in Gaussian beam optics. Other names for etendue include acceptance, throughput, light grasp, light-gathering
Etendue
Colour in living creatures caused by interference effects
(June–September 2006). "Structural colour in animals—simple to complex optics". Optics & Laser Technology. 38 (4–6): 315–322. Bibcode:2006OptLT..38..315P
Structural_coloration
Type of RC car
CyberDisplay 300M LV LCD and A300 controller IC. It contains simple optics and a diffused, white LED backlight. All of the components run on a 9v DC source
Spy_video_car
Turntable that plays records using laser beams
11 October 2017. "The World's Only Commercially-Sold Laser Turntable". Diffuser.fm. 4 May 2015. Archived from the original on 12 October 2017. Retrieved
Laser_turntable
Mechanism of light transport
In optics, subsurface scattering or subsurface light transport is the traveling of light through the surface of translucent object, the subsequent scattering
Subsurface_scattering
BREN: Body Reflection Essence-Neuter Model for Separation of Reflection Components. Optics Letters, Volume 40, Issue 9, pp. 1940-1943, May 1, 2015. v t e
Dichromatic_reflectance_model
geology, geometry, hydrodynamics, mathematics, mechanical engineering, optics, physics, pyrotechnics, and zoology. While the entire extent of his scientific
Science and inventions of Leonardo da Vinci
Science_and_inventions_of_Leonardo_da_Vinci
Electrified, luminous tube lights
signs. Light emitting diode arrays can be formed and covered with a light diffuser to simulate the appearance of neon lamps. When actual neon is used, the
Neon_sign
Lithography using 13.5 nm UV light
Concept Lithography Development System) and long-standing partner German optics manufacturer Zeiss and synchrotron light source supplier Oxford Instruments
EUV_lithography
Using sunlight for internal lighting
or skylight on a sloped roof, a laylight functions as an interior light diffuser. Before the advent of electric lighting, laylights allowed transmission
Daylighting_(architecture)
Transparent non-crystalline solid material
practical, technological, and decorative use in window panes, tableware, and optics. Some common objects made of glass are named after the material, e.g., a
Glass
British Biomedical Engineer, Quantum Biophotonics and Optical Physicist
"In vivo Measuring of Blood Flow Changes using Diffusing Wave Correlation Techniques". OSA Trends in Optics and Photonics Series. 3: CM2. doi:10.1364/BOSD
Igor_Meglinski
Angle of incidence for which all reflected light will be polarized
or prisms with their surfaces at the Brewster angle are commonly used in optics and laser physics in particular. The polarized laser light enters the prism
Brewster's_angle
Apparatus for displaying a projected image
of the image source. Flat or curved screens may be used depending on the optics used to project the image and the desired geometrical accuracy of the image
Projection_screen
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