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  2. Piston (optics) - Wikipedia

    en.wikipedia.org/wiki/Piston_(optics)

    Piston and tilt are not actually true optical aberrations, as they do not represent or model curvature in the wavefront. Defocus is the lowest order true optical aberration. If piston and tilt are subtracted from an otherwise perfect wavefront, a perfect, aberration-free image is formed.

  3. Tilt (optics) - Wikipedia

    en.wikipedia.org/wiki/Tilt_(optics)

    Piston and tilt are not actually true optical aberrations, as they do not represent or model curvature in the wavefront. Defocus is the lowest order true optical aberration. If piston and tilt are subtracted from an otherwise perfect wavefront, a perfect, aberration-free image is formed. Rapid optical tilts in both X and Y directions are termed ...

  4. Optical aberration - Wikipedia

    en.wikipedia.org/wiki/Optical_aberration

    In addition to these aberrations, piston and tilt are effects which shift the position of the focal point. Piston and tilt are not true optical aberrations, since when an otherwise perfect wavefront is altered by piston and tilt, it will still form a perfect, aberration-free image, only shifted to a different position.

  5. Optical transfer function - Wikipedia

    en.wikipedia.org/wiki/Optical_transfer_function

    The optical transfer function is used by optical engineers to describe how the optics project light from the object or scene onto a photographic film, detector array, retina, screen, or simply the next item in the optical transmission chain. Formally, the optical transfer function is defined as the Fourier transform of the point spread function ...

  6. Optoelectronics - Wikipedia

    en.wikipedia.org/wiki/Optoelectronics

    Optoelectronics (or optronics) is the study and application of electronic devices and systems that find, detect and control light, usually considered a sub-field of photonics. In this context, light often includes invisible forms of radiation such as gamma rays , X-rays , ultraviolet and infrared , in addition to visible light.

  7. Photonic integrated circuit - Wikipedia

    en.wikipedia.org/wiki/Photonic_integrated_circuit

    This design achieves high optical transmission ratios with precise angle control, addressing critical challenges in miniaturizing optoelectronic devices for improved performance in PICs. In this structure, both lateral and vertical fabrication technologies are combined, introducing a novel approach that merges two- dimensional designs [ 21 ...

  8. Automatically switched optical network - Wikipedia

    en.wikipedia.org/wiki/Automatically_switched...

    Control plane; Management plane; The Transport Plane contains a number of switches (optical or otherwise) responsible for transporting user data via connections. These switches are connected to each other via PI (Physical Interface). The Control Plane is responsible for the actual resource and connection management within an ASON network. It ...

  9. Optical line termination - Wikipedia

    en.wikipedia.org/wiki/Optical_line_termination

    An optical line termination (OLT), also called an optical line terminal, is a device which serves as the service provider endpoint of a passive optical network. It provides two main functions: to perform conversion between the electrical signals used by the service provider's equipment and the fiber optic signals used by the passive optical ...

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