An optical flat is an optical-grade piece of glass lapped and polished to be extremely flat on one or both sides, usually within a few tens of nanometres...

test an optical flat. A precisely figured reference flat is placed on top of the flat being tested, separated by narrow spacers. The reference flat is slightly...

632.8 nm helium neon laser light source. Surfaces this flat can be molecularly bonded (optically contacted) by bringing them together under the right conditions...

025 μm) flatness) quartz optical flat while applying moderate pressure. Then, the bottom of the gauge block is observed (through the optical flat) for oil...

phase change induced in reflection at the flat surface. When the distance 2t is zero (lens touching optical flat) the waves interfere destructively, hence...

An optical cavity, resonating cavity or optical resonator is an arrangement of mirrors or other optical elements that confines light waves similarly to...

Eagris, and Tagiades (water flats, snow flats), of tribe Tagiadini Flat (USPS), an oversized letter Optical flat, an extremely flat piece of glass All pages...

optics, a window is an optical element that is transparent to a range of wavelengths, and that has no optical power. Windows may be flat or curved. They are...

interferometers. In addition to classical wave model for understanding optical interference, quantum matter waves also demonstrate interference. The above...

An optical prism is a transparent optical element with flat, polished surfaces that are designed to refract light. At least one surface must be angled...

quite flat, to allow precision optical mounts to make good contact with the table without rocking and facilitate easy assembly of the optical system...

quartz makes it a useful material for precision mirror substrates or optical flats. Fused quartz is produced by fusing (melting) high-purity silica sand...

test an optical flat. A precisely figured reference flat is placed on top of the flat being tested, separated by narrow spacers. The reference flat is slightly...

An optical disc is a flat, usually disc-shaped object that stores information in the form of physical variations on its surface that can be read with the...

An optical fiber, or optical fibre, is a flexible glass or plastic fiber that can transmit light from one end to the other. Such fibers find wide usage...

the location of the secondary. Secondary mirrors in the form of an optically flat diagonal mirror are used to re-direct the light path in designs such...

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word...

tilt, and at frequencies exceeding one kilohertz. As the FSM mirror is optically flat, FSM's need not be located at pupil images. Two FSM's can be combined...

tips (flat and parallel), ratchet, and linearity of the scale. Flatness and parallelism are typically measured with a gauge called an optical flat, a disc...

for Joseph Petzval, describes the optical aberration in which a flat object normal to the optical axis (or a non-flat object past the hyperfocal distance)...

scales can be used for measuring a variety of things, from the flatness of an optical flat to neuroscientific tests. "absolute scale". Oxford Reference...

An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier...

military rifle 'scopes. He also pioneered techniques in producing large optical flat mirrors. Dr. Common discovered 34 deepsky objects which became known...

photons that were scattered by the sample were collected through an optical flat at the end of the tube. To maximize the sensitivity, the sample was highly...

for "Briar Patch" and "Combat Lion" missions. There were four small optically flat windows on each side of the forward fuselage. On some missions, a small...

into a flat glass blank using specially shaped and sized tools. This method requires a high degree of skill and training on the part of the optical engineer...

automobiles have a high optical cross section to maximize the laser return to the speed detector gun. Optical cross section of a flat mirror with a given...

distortions in the optical path. It is a standard calibration procedure in everything from personal digital cameras to large telescopes. Flat fielding refers...

a flat surface. Concentric rings are observed when the surface is illuminated with monochromatic light. This phenomenon is used with optical flats to...

reflection by flat and curved mirrors, the principles of pinhole cameras, inverse-square law governing the intensity of light, and the optical explanations...