A magnifying glass is a single convex lens which is used to produce a magnified image of an object. The lens is usually mounted in a frame with a handle. The magnifying glass is the simplest form of optical microscope. ...more on Wikipedia about "Magnifying glass"
A maser is a device that produces coherent electromagnetic waves through amplification due to stimulated emission. Historically the term came from the acronym "microwave amplification by stimulated emission of radiation", although modern masers emit over a broad portion of the electromagnetic spectrum. This has lead some to replace "microwave" with "molecular" in the acronym, as suggested by Townes ** . When optical coherent oscillators were first developed, they were called optical masers, but it has become more common to refer to these as lasers. See the section on terminology below for more on this. ...more on Wikipedia about "Maser"
A megalethoscope is an optical apparatus in which pictures are viewed through a large lens with stereoptical effects. It is often combined with the stereoscope. ...more on Wikipedia about "Megalethoscope"
A microscope ( Greek: micron = small and scopos = aim) is an instrument for viewing objects that are too small to be seen by the naked or unaided eye. The science of investigating small objects using such an instrument is called microscopy, and the term microscopic means minute or very small, not easily visible with the unaided eye. In other words, requiring a microscope to examine. ...more on Wikipedia about "Microscope"
A monochromator is an optical device that transmits a mechanically selectable narrow band of wavelengths of light chosen from a wider range of wavelengths available at the input. The name is from the Greek roots mono-, single, and chroma, colour, and the Latin suffix -ator, denoting an agent. ...more on Wikipedia about "Monochromator"
A monocular is a modified refracting telescope used to magnify the images of distant objects by passing light through a series of lenses and prisms; the use of prisms results in a lightweight telescope. Volume and weight are less than half those of binoculars, making it easy to carry along. ...more on Wikipedia about "Monocular"
Night vision goggles (NVG) are a type of optical instrument that allows one to see in the dark. They are most often used by the military. ...more on Wikipedia about "Night vision goggles" Who is http://www.shortopedia.com?
Opera glasses, also known as theater binoculars, are low power discrete and compact ...more on Wikipedia about "Opera glasses"
In optics, an optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal, then amplify it electrically, and finally reconvert it to an optical signal. An optical amplifier is essentially a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Stimulated emission in the amplifier's gain medium causes amplification of incoming light. ...more on Wikipedia about "Optical amplifier"
An optical attenuator is a device used to reduce the power level of an optical signal, either in free space or in an optical fiber. They are commonly used in fiber optic communications. ...more on Wikipedia about "Optical attenuator"
An optical cavity or optical resonator is an arrangement of mirrors that forms a standing wave cavity resonator for light waves. Optical cavities are a major component of lasers, surrounding the gain medium and providing feedback of the laser light. They are also used in optical parametric oscillators and some interferometers. ...more on Wikipedia about "Optical cavity"
Passive InfraRed sensors (PIRs) are electronic devices which are used in some security alarm systems to detect motion of an infrared emitting source, usually a human body. ...more on Wikipedia about "Passive infrared sensors"
A periscope is an instrument for observation from a concealed position. In its simplest form it is a tube in each end of which are mirrors set parallel to each other and at an angle of 45° with respect to the line between them. It may be used as a toy or for seeing over people's heads in a crowd. This form of periscope, with the addition of a simple lens, was used for observation purposes in the trenches during World War I. More complex periscopes, using prisms instead of mirrors, and providing magnification, are used on submarines. ...more on Wikipedia about "Periscope"
Photosensors or photodetectors are sensors of light or other electromagnetic energy. There are several varieties: ...more on Wikipedia about "Photodetector"
In the broadest sense, a photometer is any instrument used to measure illuminance or irradiance. As applied in industrial photometry, a "photometer" is the general term covering instruments for detecting: ...more on Wikipedia about "Photometer"
Photomultipliers, or photomultiplier tubes (PMT) or phototubes for short, are extremely sensitive detectors of light in the ultraviolet, visible and near infrared. These detectors multiply the signal produced from the incident light from which single photons are detectable. ...more on Wikipedia about "Photomultiplier"
A photoresistor is an electronic component whose resistance decreases with increasing incident light intensity. It can also be called a light-dependent resistor (LDR), or photoconductor. ...more on Wikipedia about "Photoresistor"
Polarimetry is the measurement of the polarisation of light; a polarimeter is the scientific instrument used to make these measurements. Polarimetry of thin films and surfaces is commonly known as ellipsometry. ...more on Wikipedia about "Polarimetry"
A polarizer is a device that converts an unpolarized or mixed-polarization beam of electromagnetic waves (e.g., light) into a beam with a single polarization state (usually, a single linear polarization). Polarizers are used in many optical techniques and instruments, and polarizing filters find applications in photography. ...more on Wikipedia about "Polarizer"
A polychromator is an optical device. It is used to disperse light into different directions to isolate parts of the spectrum of the light. A prism or diffraction grating can be used to disperse the light. Unlike a monochromator, it outputs multiple beams over a range of wavelengths. Polychromators are often used in spectroscopy. ...more on Wikipedia about "Polychromator"
In optics, a prism is a device used to refract light, reflect it or break it up (to disperse it) into its constituent spectral colours (colours of the rainbow). The traditional geometrical shape is that of a triangular prism, with a triangular base and rectangular sides. Some types of optical prisms are not in fact in the shape of geometric prisms. ...more on Wikipedia about "Prism (optics)"
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A QWIP, or quantum well infrared photodetector, is an infrared photodetector made from semiconductor materials which contain one or more quantum wells. These can be integrated together with electronics and optics to make infrared cameras for thermography. A very common well material is gallium arsenide, used with barrier material aluminium gallium arsenide. There are several companies world-wide manufacturing infrared systems which use QWIPs. ...more on Wikipedia about "QWIP"
A retroreflector is a device that sends light or other radiation back where it came from regardless of the angle of incidence, unlike a mirror, which does that only if the mirror is exactly perpendicular to the light beam. This effect can be commonly obtained in two ways: ...more on Wikipedia about "Retroreflector"
A ring laser gyroscope uses interference of laser light within a bulk optic ring to detect changes in orientation and spin. It is an application of a Sagnac interferometer. ...more on Wikipedia about "Ring laser gyroscope"
The shearing interferometer is an extremely simple means to observe interference and to use this phenomenon to test the collimation of light beams, especially from laser sources which have a coherence length which is usually a lot longer than the thickness of the shear plate (see graphics) so that the basic condition for interference is fulfilled. ...more on Wikipedia about "Shearing Interferometer" The text you are reading is from shortopedia
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