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Optical device which splits a beam of light in two
depending on the diffractive pattern on the element. The diffractive beam splitter is used with monochromatic light such as a laser beam, and is designed
Beam_splitter
1-dimensional beam array (1xN) or a 2-dimensional beam matrix (MxN), depending on the diffractive pattern on the element. The diffractive beam splitter is used
Diffractive_beam_splitter
Laser to generate a laser line instead of a point
for use with image processing. Diffractive beam splitter, an optical element that divides a beam into multiple beams, like for example a matrix of dots
Line_laser
Method of fabricating nanometer scale patterns using a special stamp
biomolecular sorting device an order of magnitude smaller and more efficient. A diffractive lens created using nanoimprint lithography A key benefit of nanoimprint
Nanoimprint_lithography
Physics experiment
splits the beam with a beam splitter. In the basic version of this experiment, a coherent light source, such as a laser beam, illuminates a plate pierced
Double-slit_experiment
enhancement Diamond turning Dichroic filter Dielectric mirror Diffractive beam splitter Digital holographic microscopy Diode-pumped solid-state laser
List_of_laser_articles
Concept in quantum mechanics
The first beam-splitter mirror acts like double slits, but in the interferometer case we can remove the second beam splitter. Then the beam heading down
Wave–particle_duality
Imaging and diffraction using electrons that pass through samples
Transmission electron microscopy (TEM) is a microscopy technique in which a beam of electrons is transmitted through a specimen to form an image. The specimen
Transmission electron microscopy
Transmission_electron_microscopy
Interferometric arrangement
beam splitter is made parallel using a lens and split by slits into two beams, which traverse a tube carrying water moving with velocity v. Each beam
Fizeau_interferometer
Device which diffracts light via sound waves
crystal at the same angle. Finally, the returning light is split off using a polarizing beam splitter. In this configuration, the output frequency shift is
Acousto-optic_modulator
Common configuration for optical interferometry
Abraham Michelson in 1887. Using a beam splitter, a light source is split into two arms. Each of those light beams is reflected back toward the beamsplitter
Michelson_interferometer
Recording to reproduce a three-dimensional light field
laser beam to be aimed through a series of elements that change it in different ways. The first element is a beam splitter that divides the beam into two
Holography
Type of gunsight
the reticle image hologram. The source beam is light that is sourced from the reference beam (via a beam-splitter) that takes an alternative path, reflecting
Holographic_weapon_sight
Experimental method in X-ray diffraction
waves reach the sample, the incoming beam is either reflected off the surface, or can enter the lattice and be diffracted by the atoms present in the sample
Powder_diffraction
Technique to analyze the infrared spectrum of matter
approximately a black-body radiator, is collimated and directed to a beam splitter. Ideally 50% of the light is refracted towards the fixed mirror and
Fourier-transform infrared spectroscopy
Fourier-transform_infrared_spectroscopy
Type of angular momentum in light
angular momentum of a light beam that is dependent on the field spatial distribution, and not on the polarization. OAM can be split into two types. The internal
Orbital angular momentum of light
Orbital_angular_momentum_of_light
Overview article
re-constructing beam is incident. Only volume holograms can be used to make reflection holograms, as only a very low intensity diffracted beam would be reflected
Physics_of_optical_holography
Transparent optical element with flat, polished surfaces that refract light
of one right-angled prism, and cemented to another prism to form a beam-splitter cube. Overall optical performance of such a cube is determined by the
Prism_(optics)
Optical filter in fluorescence microscopy
filter and a dichroic beam splitter in a cube so that the group is inserted together into the microscope. The dichroic beam splitter controls which wavelengths
Excitation_filter
Device to determine relative phase shift
paths between the beam splitters. This can be accomplished by blocking one of the paths, or equivalently by removing the first beam splitter (and feeding the
Mach–Zehnder_interferometer
Measurement device
"zero order diffracted order" while a small amount of the beam is diffracted into a higher diffractive order, providing a "sample" of the beam. By directing
Laser_beam_profiler
Scanning electron microscopy technique
beam of electrons hits a tilted sample. As backscattered electrons leave the sample, they interact with the atoms and are both elastically diffracted
Electron backscatter diffraction
Electron_backscatter_diffraction
Ways in which length, distance or range can be measured
interferometer: the two panels show a laser source emitting a light beam split by a beam splitter (BS) to travel two paths. The light is recombined by bouncing
Length_measurement
ray-tracing. A variant of beam tracing casts a pyramidal beam through each pixel of the image plane. This is then split up into sub-beams based on its intersection
Beam_tracing
Technique for patterning photomasks
requirement can be lifted if a diffraction grating is used as a beam splitter, since different wavelengths would diffract into different angles but eventually
Interference_lithography
Fundamental principle of physics
a beam can be modeled as a linear system where the input stimulus is the load on the beam and the output response is the deflection of the beam. The
Superposition_principle
Optical phenomenon
Laguerre-Gaussian beam which is transferred to film. The CGH resembles a common Ronchi linear diffraction grating, save a "fork" dislocation. An incident laser beam creates
Optical_vortex
simple case of transforming a two-beam array, a universal modal unitary can be implemented using a variable beam splitter and three phase-shifters. In 1994
Universal multiport interferometer
Universal_multiport_interferometer
Model of phonons-polaritons
phonon-polariton propagation may also be achieved by guided wave, reflective, diffractive, and dispersive elements, as well as photonic and effective index crystals
Polaritonics
Light wave manipulation
devices and for aiming laser beams on a macroscopic scale. Complicated patterns of phase variation can be used to produce diffractive optical elements, such
Phased-array_optics
Elementary particle or quantum of light
waves will diffract, but photon energy does not spread out as it propagates, nor does this energy divide when it encounters a beam splitter. Rather, the
Photon
Kind of show made with laser light
holograms, essentially complicated gratings, the beam can be split into various patterns. Diffraction uses something referred to as the Huygens-Fresnel
Laser_lighting_display
Type of transmissive optical device
metamaterials to achieve super-resolution imaging and go beyond the diffraction limit. The diffraction limit is a feature of conventional lenses and microscopes
Superlens
Measurement technique
the broadband light source. A beam splitter separates the light into reference and measurement beams. The reference beam is reflected by the reference
White_light_interferometry
Special lens with a conical surface
allows a wide variety of beam patterns to be generated. It can be used to turn a Gaussian beam into a non-diffractive Bessel-like beam. Axicons were first
Axicon
Physics experiment in quantum mechanics
photon is subjected to a beam splitter. If one thinks in terms of a stream of photons being randomly directed by such a beam splitter to go down two paths
Delayed-choice_quantum_eraser
Phenomenon resulting from the superposition of two waves
wavefront-division systems. In an amplitude-division system, a beam splitter is used to divide the light into two beams travelling in different directions, which are then
Wave_interference
Changing the direction of the main lobe of a radiation pattern
Beam steering is a technique for changing the direction of the main lobe of a radiation pattern. Beam tilt is used in radio to aim the main lobe of the
Beam_steering
Quantum mechanical waves describing matter
matter exhibits wave-like behavior. For example, a beam of electrons can be diffracted just like a beam of light or a water wave. The concept that matter
Matter_wave
Elementary particle with negative charge
diffraction (LEED) is a method of bombarding a crystalline material with a collimated beam of electrons and then observing the resulting diffraction patterns
Electron
Measurement method using interference of waves
incoming beam of coherent light will be split into two identical beams by a beam splitter (a partially reflecting mirror). Each of these beams travels
Interferometry
Object detection system using radio waves
Hoyt Taylor and Leo C. Young discovered that ships passing through the beam path caused the received signal to fade in and out. Taylor submitted a report
Radar
X-ray imaging technique
("topographies") record the intensity profile of a beam of X-rays (or, sometimes, neutrons) diffracted by a crystal. A topography thus represents a two-dimensional
Diffraction_topography
Electromagnetic radiation with wavelengths from 1 m to 1 mm
travel by line-of-sight; unlike lower frequency radio waves, they do not diffract around hills, nor follow the Earth's surface as ground waves, nor reflect
Microwave
Vacuum tube used to display images
a vacuum tube containing one or more electron guns, which emit electron beams, which are directed and controlled to display images on a phosphorescent
Cathode_ray_tube
Quantum-mechanical many-body entangled state
spontaneous parametric down-conversion and a classical laser beam on a 50:50 beam splitter, was used by I. Afek, O. Ambar, and Y. Silberberg to experimentally
NOON_state
Imaging systems using changes in phase
increased. Since the position of the interference fringes formed behind the beam-splitter grating is independent of wavelength over a wide energy range of the
Phase-contrast_X-ray_imaging
Microscopy technique
into an optical fiber through a polarizer, a beam splitter and a coupler. The polarizer and the beam splitter would serve to remove stray light from the
Near-field scanning optical microscope
Near-field_scanning_optical_microscope
Potential for two waves to interfere
when one of the mirrors is moved away gradually from the beam-splitter, the time for the beam to travel increases and the fringes become dull and finally
Coherence_(physics)
light Avalanche photodiode Aventurescence Axicon Barrel distortion Beam splitter Beer–Lambert law Binoculars Birefringence Black-body radiation Brewster's
Index_of_optics_articles
International high-tech company
commercialization of new products based on diffractive optical elements (DOEs). Holo/Or is a leading company in the field of diffractive optical design and manufacture
Holo/Or
Range of spectroscopic analysis
a double-beam instrument, the light is split into two beams before it reaches the sample. One beam is used as the reference; the other beam passes through
Ultraviolet–visible spectroscopy
Ultraviolet–visible_spectroscopy
Dispersive optical device
virtually imaged phased array (VIPA) in combination with a wavelength splitter to demultiplex wavelength division multiplexed (WDM) light" Archived 2024-10-08
Virtually_imaged_phased_array
Interferometer which uses the wave-like nature of atoms
are reversed compared to the laser based interferometers, i.e. the beam splitter and mirrors are lasers while the source emits matter waves (the atoms)
Atom_interferometer
Compact composite lens
refraction to capture more oblique light from the light source and add it to the beam, making it visible at greater distances. The design allows the construction
Fresnel_lens
Type of reflective prism
the beam is split in half, with one half of the beam hitting first one face then the other face, while it is invert for the other half of the beam. Therefore
Roof_prism
microstructures. To achieve interference, the beam is divided by a beam splitter, specialized prisms, or other elements. The beams are then overlapped on amaterial
Direct laser interference patterning
Direct_laser_interference_patterning
Imaging method
spin state may be monitored by feeding the transmitted probe beam through a beam splitter before imaging onto a camera sensor. By adjusting the polarizer
Phase-contrast_imaging
Holography of electron waves
transmission electron microscope (TEM) in an off-axis scheme. The electron beam is split into two parts by a paper-thin positively charged wire. Positive voltage
Electron_holography
operated at a power level of about 100 watts of laser power at the beam splitter. A currently ongoing upgrade to Advanced LIGO will require several kilowatts
Common-path_interferometer
Idealized model of light
physical optics or wave theory. Collimated beam Optical path Optical path length Paraxial approximation Pencil beam Ray transfer matrix analysis Moore, Ken
Ray_(optics)
Product of geometric length and refractive index
lengths of two coherent waves (for example, a laser beam split into two paths by a beam splitter) determines the corresponding phase difference at their
Optical_path_length
Branch of spectroscopy
The light source is shone into a monochromator, diffracted into a rainbow, and split into two beams. It is then scanned through the sample and the reference
Spectrophotometry
Semiconductor laser
where one needs a very large amount of power, but not a small diffraction-limited TEM00 beam, such as in printing, activating chemicals, microscopy, or pumping
Laser_diode
Concept in Quantum mechanics
that is diffracted by a diffractive object, such as for example a crystal, is regarded as really and physically behaving like a wave, split into components
Ensemble_interpretation
Synchrotron radiation facility at Lund University in Sweden
give the electron beam the size of a pressed human hair. In 5 of the 12 straight sections, undulators are oscillating the electron beam, causing it to emit
MAX_IV_Laboratory
Microwave antenna
which functions as a converging lens to collimate the radio waves into a beam. Conversely, in a receiving antenna the lens focuses the incoming radio waves
Lens_antenna
Type of distributed Bragg reflector constructed in a short segment of optical fiber
reconfigurable through special packaging and system design. Different coatings of diffractive structure are used for fiber Bragg gratings in order to reduce the mechanical
Fiber_Bragg_grating
Technique used in optical systems
to achieve a greater field of view. An alternative is the use of a laser beam to generate a reference light source (a laser guide star, LGS) in the atmosphere
Adaptive_optics
Spectroscopic technique
electron population spectra are obtained by irradiating a material with a beam of X-rays. XPS is based on the photoelectric effect that can identify the
X-ray photoelectron spectroscopy
X-ray_photoelectron_spectroscopy
Optical characteristics of the atmosphere
of light penetrating holes in low clouds (also called "Jacob's Ladder"). Beams of light diverging from behind a cloud. Pale, pinkish or reddish rays that
Atmospheric_optics
Deviation of electrons from their original trajectories
solid in several ways: Not at all: no electron scattering occurs and the beam passes straight through. Single scattering: when an electron is scattered
Electron_scattering
Imaging mode of electron microscopes
coordinate x is a superposition of a plane wave and a multitude of diffracted beams with different in plane spatial frequencies u (spatial frequencies
High-resolution transmission electron microscopy
High-resolution_transmission_electron_microscopy
CERN LHC experiment
into separate beam pipes; AFP (Atlas Forward Proton) is designed to tag diffractive events, and located at 204 m and 217 m; ALFA (Absolute Luminosity For
ATLAS_experiment
Microscope observing a thin depth of a cell
TIRFM, the excitation beam and fluoresced emission beam will be captured via the same objective lens. Thus, to split the beams, a dichromatic mirror is
Total internal reflection fluorescence microscope
Total_internal_reflection_fluorescence_microscope
Measurement of infrared radiation's interaction with matter
[citation needed] The infrared spectrum of a sample is recorded by passing a beam of infrared light through the sample. When the frequency of the IR matches
Infrared_spectroscopy
plasmas (laboratory or astrophysical) or in accelerator experiments (beam-foil, electron beam ion trap (EBIT)). The lowest exited electron shells of such ions
History_of_spectroscopy
Thin layer of material
using diffraction contrast in TEM images. Higher-order Laue zone (HOLZ) features can be accurately measured using convergent beam electron diffraction. This
Thin_film
Funnel-shaped waveguide radio device
a flaring metal waveguide shaped like a horn to direct radio waves in a beam. Horns are widely used as antennas at UHF and microwave frequencies, above
Horn_antenna
Physical process
beam producing a bit over 30 neutrons in the most productive targets), while fission produces on the order of 200 MeV per actinide atom that is split
Spallation
Proposed nuclear pulse propulsion through antimatter-catalyzed nuclear chain reactions
and some is transferred as kinetic energy to the nucleus, causing it to split (the fission reaction). The resulting shower of neutrons can cause the surrounding
Antimatter-catalyzed nuclear pulse propulsion
Antimatter-catalyzed_nuclear_pulse_propulsion
Diode that emits light from an organic compound
more complex interferences than those in BEOLEDs. In addition to the two-beam interference, there exists a multi-resonance interference between two electrodes
OLED
International research facility
space for seven light beams, only two beams were operational when the facility opened in 2017. The first beam is an X-ray beam that will be used to study
Synchrotron-Light for Experimental Science and Applications in the Middle East
Synchrotron-Light_for_Experimental_Science_and_Applications_in_the_Middle_East
Type of electromagnetic spectroscopy
lamp has a constant intensity at all wavelengths. To correct this, a beam splitter can be applied after the excitation monochromator or filter to direct
Fluorescence_spectroscopy
History of research by Augustin-Jean Fresnel
wavefront of limited extent (in a uniform medium) gave a straight, parallel beam. While this construction indeed predicted rectilinear propagation, it was
Fresnel's_physical_optics
Class of antennas
aid applications such as portable interaction with satellites, wide angle beam steering, emergency communications devices, micro-sensors and portable ground-penetrating
Metamaterial_antenna
Induction of radioactivity by neutron radiation
energy In other words, the capture of a neutron by lithium-7 causes it to split into an energetic helium nucleus (alpha particle), a hydrogen-3 (tritium)
Neutron_activation
Mechanical television system
transparent fluid which used mechanical oscillations to modulate the light beam passing through it. It was a substantial improvement over the previous Kerr
Scophony
Non-mathematical introduction
the work contributing to Stern’s 1943 Nobel Prize in Physics. They fired a beam of silver atoms through a magnetic field. According to classical physics
Introduction to quantum mechanics
Introduction_to_quantum_mechanics
Indian physicist (1888–1970)
physics from Presidency College at age 16. His first research paper, on diffraction of light, was published in 1906, while he was a graduate student. The
C._V._Raman
Mathematical method used in optics and acoustics
each layer. In this description the interface is split into n layers. Since the incident neutron beam is refracted by each of the layers the wavevector
Transfer-matrix method (optics)
Transfer-matrix_method_(optics)
Behaviour of travelling radio waves
line-of-sight propagation. The interference between the direct beam line-of-sight and the ground reflected beam often leads to an effective inverse-fourth-power (1⁄distance4)
Radio_propagation
Analytical technique
signal The filtered beam is once again focused through a lens and split into several beams with a diffraction grading The diffracted signal is reflected
Piezospectroscopy
Propagating atomic wave
various techniques. Much like an optical laser, an atom laser is a coherent beam that behaves like a wave. There has been some argument that the term "atom
Atom_laser
Apparatus for trapping and cooling neutral atoms
a 2-dimensional diffraction grating or a pyramid arrangement of mirrors, it is possible to generate the configuration of laser beams required for a magneto-optical
Magneto-optical_trap
Object that reflects an image
coating and substrate. For transmissive mirrors, such as one-way mirrors, beam splitters, or laser output couplers, the transmissivity of the mirror is an important
Mirror
Linear crystallographic defect or irregularity
microscopy with the TEM, a diffracted spot is selected to form the image (as mentioned before, lattice planes diffract the beam into spots), and the image
Dislocation
Sub-field in optics consisting of lenses and mirrors
an important role in optical quantum computing. Phase shifters and beam splitters are examples of devices commonly used in linear optics. In contrast
Linear_optics
Nonlinear optical process
polarities (± boundary, B) that is parallel to the beam propagation (see figure), the SHG will be split into two lobes whose amplitudes have opposite sign
Second-harmonic_generation
Device that converts sound into an electrical signal
light is split and fed to an interferometer, which detects movement of the surface by changes in the optical path length of the reflected beam. The former
Microphone
DIFFRACTIVE BEAM-SPLITTER
DIFFRACTIVE BEAM-SPLITTER
Boy/Male
African, German
Peace; Bear
Boy/Male
Australian, German
Bear; Courageous
Surname or Lastname
English
English : probably a habitational name from Bytham in Lincolnshire, so named with Old English bythme ‘valley bottom’ + hÄm ‘homestead’.
Surname or Lastname
English
English : metonymic occupational name for a grower or seller of beans, from Old English bēan ‘beans’ (a collective singular). Occasionally it may have been applied as a nickname for a someone considered of little importance.English : nickname for a pleasant person, from Middle English bēne ‘friendly’, ‘amiable’ (of unknown origin; there is apparently no connection with Bain or Bon).Scottish : Anglicized form of the Gaelic personal name Beathán, a diminutive of beatha ‘life’.Translation of German Bohne, or an altered spelling of Biehn. See also Bihn.Mistranslation of French Lefevre. As the vocabulary word fèvre ‘smith’ was replaced by forgeron, the meaning of the old word became opaque, and the surname was reinterpreted as if it were La fève, from fève ‘(fava) bean’. Lefevre is the most common name in French Canada; great numbers of them migrated to the US, where many adopted the name Bean, in the belief that it was a translation of Lefèvre. See also Lafave.
Surname or Lastname
English
English : from the Middle English nickname Bere meaning ‘bear’ (Old English bera, which is also found as a byname), or possibly from a personal name derived from a short form of the various Germanic compound names with this first element. Compare for example Bernhard. The bear has generally been regarded with a mixture of fear and amusement because of its strength and unpredictable temper on the one hand and its clumsy gait on the other, and in the medieval period it was also thought to typify the sins of sloth and gluttony. All these characteristics are no doubt reflected in the nickname. Throughout the Middle Ages the bear was a familiar figure in popular entertainments such as bear baiting and dancing bears.English : variant spelling of the habitational name Beer.Probably a translation of cognates of 1 in other languages, for example German Baer, and also an Americanized spelling of German Bahr.
Girl/Female
Latin
andmeaning bringer of joy.
Boy/Male
French American
Handsome. Famous namesakes: 19th-century British dandy Beau Brummell, AKA George Bryan Brummell;...
Boy/Male
American, British, English, French
Handsome
Female
English
Short form of English Beatrix, BEA means "voyager (through life)."Â
Boy/Male
Scottish
Fair skinned.
Boy/Male
Irish Hebrew Dutch English Scottish Gaelic
Surname or Lastname
English (of Norman origin)
English (of Norman origin) : from Old French bel(e) ‘fair’, ‘lovely’ (see Beau), either a nickname for a handsome man or a metronymic from this word used as a female personal name.English : habitational name from places so named in Northumberland and West Yorkshire. The former of these (Behil in early records) comes from Old English bēo ‘bee’ + hyll ‘hill’; the latter (Begale in Domesday Book) is from Old English bēag ‘ring’, here probably used in the sense ‘river bend’, or an unattested personal name Bēaga derived from this word + halh ‘nook’, ‘recess’.French (Béal) : topographic name for someone who lived by a mill race, from the Lyonnaise dialect term béal, bezale, bedale (of Gaulish origin).Americanized spelling of German Biehl or Bühl (see Buehl).Lt. Col. Thomas Beal(e) (c.1621–c.1676) of London settled in York Co., VA, about 1650.
Boy/Male
German African
Bear.
Boy/Male
Irish
Small.
Male
English
Originally an English pet name BEAU means "handsome," derived from the French word, beau, meaning "beautiful." Later, in the 19th century, it was used as a word meaning "admirer" or "sweetheart." Its use as a forename seems to have been due to Wren's novel Beau Geste (1924) and the character Beau Wilkes in Mitchell's Gone With the Wind (1936).Â
Boy/Male
Latin
F: Ameaning bringer of joy. In the Divine Comedy, Beatrice was Dante's guide through Paradise,...
Surname or Lastname
English
English : habitational name from Bream in Worcestershire, which is probably named in Old English as ‘the place where broom grows’, from brÄ“me, an unattested dialect variant of brÅm ‘broom’.English : nickname for a fierce or energetic person, from Middle English brem(e), brim(me) ‘fierce’, ‘vigorous’ (from Old English brÄ“me ‘famous’, ‘noble’).English : variant of Braham.
Surname or Lastname
Scottish
Scottish : variant of Bate or Beath.English and Scottish : from a short form of the female personal name Beton (see Beaton 2).
Boy/Male
Muslim
Fun, Eid, Enjoyment
Surname or Lastname
English
English : from Old English bēam ‘beam’, ‘post’, a term with various applications. It denoted the beam of a loom and was therefore in some cases a metonymic occupational name for a weaver. In others it was a topographic name for someone who lived by a post or tree, or by a footbridge made from a tree trunk.Americanized form of German Boehm, or sometimes of Baum.
DIFFRACTIVE BEAM-SPLITTER
DIFFRACTIVE BEAM-SPLITTER
Female
Hungarian
Hungarian form of German Hilda, ILDIKÓ means "battle."
Female
Irish
Irish Gaelic form of Provençal Aliénor, EILEANÓRA means "foreign; the other."
Girl/Female
Arabic, Australian, Muslim
Beautiful; Handsome
Girl/Female
Hindu, Indian, Marathi, Sanskrit
Saffron; Yellow Jasmine
Boy/Male
Muslim
Lover. Fancier.
Boy/Male
English, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sikh, Tamil, Telugu
Satisfaction
Boy/Male
Russian
Moorish.
Boy/Male
Biblical
He that defends Baal; let Baal defend his cause.
Girl/Female
Australian, French, Portuguese
Ship's Island; Whistling Voice
Girl/Female
Indian
Fair complexioned
DIFFRACTIVE BEAM-SPLITTER
DIFFRACTIVE BEAM-SPLITTER
DIFFRACTIVE BEAM-SPLITTER
DIFFRACTIVE BEAM-SPLITTER
DIFFRACTIVE BEAM-SPLITTER
v. t.
To convey or haul with a team; as, to team lumber.
v. t.
To strike repeatedly; to lay repeated blows upon; as, to beat one's breast; to beat iron so as to shape it; to beat grain, in order to force out the seeds; to beat eggs and sugar; to beat a drum.
a.
Emitting beams of light; radiant; shining.
a.
That produces diffraction.
v. t.
To beat or bang.
v. t.
To give the signal for, by beat of drum; to sound by beat of drum; as, to beat an alarm, a charge, a parley, a retreat; to beat the general, the reveille, the tattoo. See Alarm, Charge, Parley, etc.
n.
Fig.: A ray; a gleam; as, a beam of comfort.
n.
The width of a vessel; as, one vessel is said to have more beam than another.
p. p.
of Beat
a.
Distractive.
v. t.
To send forth; to emit; -- followed ordinarily by forth; as, to beam forth light.
n.
A heavy iron lever having an oscillating motion on a central axis, one end of which is connected with the piston rod from which it receives motion, and the other with the crank of the wheel shaft; -- called also working beam or walking beam.
imp.
of Beat
a.
Resembling a beam in size and weight; massy.
n.
One of the long feathers in the wing of a hawk; -- called also beam feather.
v. i.
To emit beams of light.
v. t.
To bring forth or produce; to yield; as, to bear apples; to bear children; to bear interest.
n.
An animal which has some resemblance to a bear in form or habits, but no real affinity; as, the woolly bear; ant bear; water bear; sea bear.
n.
A ray or collection of parallel rays emitted from the sun or other luminous body; as, a beam of light, or of heat.
n.
A cylinder of wood, making part of a loom, on which weavers wind the warp before weaving; also, the cylinder on which the cloth is rolled, as it is woven; one being called the fore beam, the other the back beam.