Optical microscopes have refractive glass and occasionally of plastic or quartz, to focus light into the eye or another light detector.

Optical engineers design components of optical instruments such as lenses, microscopes, telescopes, and other equipment that utilizes the properties of light.

Another early brand used on microscopes was Joico, an abbreviation of " Japan Optical Industries Co ".

Optical microscopes with magnifications of 200-400x are typically used to screen phytoliths.

Optical probes and / or laser probes can be used ( if possible in combination ), which change CMMs to measuring microscopes or multi-sensor measuring machines.

Optical bistability is an attribute of certain optical devices where two resonant transmissions states are possible and stable, dependent on the input.

Optical isolators are one-way devices that are commonly used with lasers.

For example, Optical illusions are errors in the conceptual identification of what is seen, not errors in sight itself.

Optical brighteners, optical brightening agents ( OBAs ), fluorescent brightening agents ( FBAs ) or fluorescent whitening agents ( FWAs ) are dyes that absorb light in the ultraviolet and violet region ( usually 340-370 nm ) of the electromagnetic spectrum, and re-emit light in the blue region ( typically 420-470 nm ).

* Optical fibers, which are used in endoscopes and telecommunications.

There are three main variants in use: the Stinger basic, STINGER-Passive Optical Seeker Technique ( POST ), and STINGER-Reprogrammable Microprocessor ( RMP ).

Synchronous Optical Networking ( SONET ) and Synchronous Digital Hierarchy ( SDH ) are standardized protocols that transfer multiple digital bit streams over optical fiber using lasers or highly coherent light from light-emitting diodes ( LEDs ).

* Optical methods are first used in the creation of art.

Closed-loop mirror galvanometers are also used in stereolithography, in laser sintering, in laser engraving, in laser beam welding, in laser TV, in laser displays, and in imaging applications such as Optical Coherence Tomography ( OCT ) retinal scanning.

Optical corner reflectors, called corner cubes, made of three-sided glass prisms, are used in surveying and laser rangefinding.

Optical amplifiers are important in optical communication and laser physics.

By using a noncollinear interaction geometry Optical Parametric Amplifiers are capable of extremely broad amplification bandwidths.

Optical isolators are different from 1 / 4 wave plate based isolators because the Faraday rotator provides non-reciprocal rotation while maintaining linear polarization.

* In Optical phase space, quadratures are operators which represent the real and imaginary parts of the complex amplitude

Optical fiber connectors are used to join optical fibers where a connect / disconnect capability is required.

Optical fiber connectors are used in telephone company central offices, at installations on customer premises, and in outside plant applications.

The latest industry requirements for optical fiber connectors are in Telcordia GR-326, Generic Requirements for Singlemode Optical Connectors and Jumper Assemblies.

Industry requirements for multi-fiber optical connectors are covered in GR-1435, Generic Requirements for Multi-Fiber Optical Connectors.

Optical lattices are used to simulate interacting condensed matter physics | condensed matter systems.

Optical effects ( also called photographic effects ), are techniques in which images or film frames are created photographically, either " in-camera " using multiple exposure, mattes, or the Schüfftan process, or in post-production processes using an optical printer.

Optical diagnostics and telemetry are often extracted or inserted at such a site, to allow for localization of any fiber breaks or signal impairments.

Optical relay systems that allow the source and detector each to be about a meter from the sample are typically employed.

* Optical astronomy is the oldest kind of astronomy.

See also: Optical lens design, Fabrication and testing of optical components

* Optical lens design

Cross-section view of SLR system: 1: Front-mount lens ( four-element Tessar design ) 2: Reflex mirror at 45-degree angle 3: Focal plane shutter 4: Film or sensor 5: Focusing screen 6: Condenser lens 7: Optical glass pentaprism ( or pentamirror ) 8: Eyepiece ( can have diopter correction ability )

In the early 1990s, a firm that designed and built refracting telescopes was named in his honor, Fraunhofer Systems Company, since the telescopes were based on his design but now the company is part of Burbank Optical Company.

* Optical font scaling: depending on the staff size, the design of the music font is slightly altered ; this is a feature that Donald Knuth's Computer Modern font is known for.

# REDIRECT Optical lens design

Optical limitations with the design of the camera itself meant that if distant scenes joined perfectly, closer objects did not ( parallax error ).

* Optical lens design

In 1957, the Asahi Optical Company ( later " Pentax ") introduced the Pentax, a 35 mm Single-lens reflex camera ( SLR ) camera which was so well received that it influenced the design of 35 mm SLRs worldwide for years to come.

CWC provide Optical fiber, wireless, wifi, cable internet, webhosting, web design, software development, VPN service, Online databackup, Intranet within kathmandu, and lalitpur

* Optical Tutorial-discusses monochromator design in great detail

The series is well known for its fast-paced gameplay and high-quality 3D visual design, along with running on the full resolution of the console the game belongs to ; as well as its association with electronica and electronic dance music, as well as its continous collaboration with certain artists ( The Chemical Brothers, Optical, FSOL, Cold Storage, Kraftwerk, Orbital, Aphex Twin and others ).

Maksutov's design for a meniscus telescope was the first to be published, appearing in the Journal of the Optical Society of America Vol.

For people in the field of optics who design and manufacture all types optical devices, see: Category: Optical engineers.

He studied optical design at the Imperial College of Science and Technology, under eminent optical designer and theoretician Alexander Eugen Conrady, and earned a Masters degree in Optical Design.

After a few years stint at TBE Geveden joined NASA in 1990, and worked on hardware design for a number of science satellite missions, including as project manager for the Optical Transient Detector satellite, the Lightning Imaging Sensor satellite, and the Gravity Probe B satellite, a successful test of frame dragging effects predicted by General Relativity.