An image intensifier, also known as an image intensification tube or image intensification device, is a specialized electronic device used to amplify low-light-level images to make them visible to the human eye or to cameras. These devices are...

Spherical aberration is an optical aberration that occurs when light rays passing through a lens or curved optical surface...

Intensity distribution in the image of an edge. The gradient of the edge-response curve is a measure of the image quality of...

An optical testing instrument is a device or system used to evaluate and measure the performance, quality, and...

A measure of the closeness with which an optical image is capable of resembling the original object. The factors that affect...

A low-power telescope placed at the eyepiece of an optical system to increase overall magnification. Most often used to...

A point source of light used for the test and evaluation of image quality. May be a backlit pinhole in an otherwise opaque...

A form of high-power microscope objective where the space between the object and the first element is filled with an oil...

An aspheric lens is a type of lens whose surface profiles deviate from the traditional spherical shape. Unlike spherical...

Chromatic aberration is an optical phenomenon that occurs when different wavelengths (colors) of light are refracted by a...

An optical filter is a device that selectively transmits or blocks specific wavelengths, or colors, of light. Optical...

A GRIN (gradient index) lens is a type of optical lens that utilizes a gradient in refractive index across its volume rather...

Freeform optics refers to the design and fabrication of optical surfaces that do not follow traditional symmetric shapes,...

A short focal length (less than five inches) positive lens used to produce a magnified image of the object being viewed....

A method of evaluating image quality whereby a large number of rays are traced through a lens from a single object point,...

An optical combiner, in the context of optics and display technologies, refers to a device or component that combines...

An apochromat, often referred to as an apochromatic lens or apochromatic objective, is a type of optical system designed to...

Pixel pitch refers to the distance between the centers of two adjacent pixels on a display screen or imaging sensor. It is...

Optical coatings are thin layers of materials applied to optical components, such as lenses, mirrors, filters, and prisms,...

A diffraction pattern sampling unit composed of a 32-element monolithic silicon photodiode array and a readout unit. The...

Optical coherence tomography (OCT) is a non-invasive imaging technique used in medical and scientific fields to capture...

Optical design software refers to specialized computer programs used by optical engineers, physicists, and designers to...

An organic light-emitting diode (OLED) is a type of light-emitting diode (LED) technology that utilizes organic compounds to...

Liquid crystal on silicon (LCoS) is a display technology that combines liquid crystal materials with silicon-based...

A charge-coupled device (CCD) is a type of electronic image sensor used in various imaging devices, including digital...

An aspheric mirror is an optical mirror surface that deviates from the shape of a perfect sphere, having a non-spherical...

The Shack-Hartmann wavefront sensor is an optical device used for measuring the wavefront aberrations of an optical system....

An aplanatic surface is an optical surface that is specifically designed or shaped to minimize spherical aberration and...

A CCD image sensor, or charge-coupled device image sensor, is a type of electronic device used to convert optical images...

A digital camera is a device that captures and records still images or video in digital format. Unlike traditional film...

QLED stands for quantum dot light-emitting diode. QLED is a display technology that utilizes quantum dots, which are...

A measure of image quality produced by an optical system. May be specified in terms of cycles per millimeter, referencing a...

The point spread function (PSF) is a fundamental concept in imaging that describes the response of an imaging system to a...

Also known as the Wiener spectrum or the noise power spectrum, the optical power spectrum is a fundamental quantity in...

The restriction of wavefront error to within a quarter of a wavelength of a true spherical surface to assure essentially...

A CCD camera, or charge-coupled device camera, is a type of digital camera that utilizes a CCD image sensor to capture and...

An achromat, in the context of optics, refers to a type of lens or lens system designed to reduce chromatic aberration....

Pixel binning, also known as pixel merging or pixel combining, is a technique used in digital imaging and camera technology....

Quantum efficiency (QE) is a measure of the effectiveness with which a device or system, typically in the context of...

Off-axis paraboloid and ellipsoid mirrors are specialized optical components used in various optical systems, particularly...

The mathematical evaluation of an optical system to determine and quantify its basic optical properties and image quality...

Graphic representation of quantified values of image quality whose points all refer to images that are of a constant...

A CMOS camera refers to an imaging device that employs a complementary metal-oxide-semiconductor (CMOS) image sensor to...