Teledyne DALSA - Line Scan Leader 5/24 LB

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Zurich Instruments AG - Lock-In Amplifiers 4/24 HP

344 terms

Photonics Dictionary

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photographic dosimetry

The use of photographic emulsions to detect and determine the amounts of ionizing radiation, such as x-rays and gamma rays, in an area. This is accomplished by exposing the emulsion to the radiation...

photographic exposure

The product of exposure time and irradiance or illuminance.

photographic field

The maximum angle of view that can be recorded by a camera. Field is a function of lens focal length and film format.

photographic photometry

A form of photometric measurement, often used with light sources that are transparent or fluctuating, in which a photographic plate is used to obtain a record of a source's relative intensities over...

photographic radiometry

The use of photographic recording equipment to measure radiant energy. With this procedure, many measurements of radiant energy can be recorded simultaneously and permanently.

photographic resolution

A measure of the ability of a photographic system to record fine detail. Usually stated in terms of cycles per millimeter on the processed film.

photographic sensitometer -> sensitometer

An instrument for determining the sensitivity of a photographic film to light. The film is given either a stepped exposure or a continuously varied exposure; after processing, the density is measured...

photographic sensitometry

The measurement of the responsivity of photographic media and of the relations between exposure and density of developed images.

photographic shutter efficiency

A measure of the total light passed by a shutter during an exposure, compared with the light that could be passed by an idealized, infinitely fast shutter fully open for the same extreme time.

photographic sound recorder

A system in which the electrical signal embedded within an audio input signal is converted to a modulated light pattern and recorded on film.

photographic thermometry

The photographic recording of the heat radiation emitted from various points on the object as corresponding density variations on fast infrared film.

optical sound recorder -> photographic sound recorder

A system in which the electrical signal embedded within an audio input signal is converted to a modulated light pattern and recorded on film.

aerial photography

Photographing of terrain on the ground and objects in the air by cameras mounted in aircraft; utilized in satellites, multispectral scanning and intricate data handling systems.

analytical photography

The use of photographs -- motion picture or still -- to establish if a particular event exists.

astronomical photography

The use of photographs to record astronomical objects and phenomena for purposes of physical observation and measurement of motion, radiation and spectra.

bubble chamber photography

The photographic recording of gas bubbles produced when particles traverse liquid hydrogen in a bubble chamber.

chronophotograph

The continuous record containing the series of pictures formed by chronophotographic methods.

chronophotography

The photographic recording of an action by taking a series of still pictures at regular intervals throughout the action.

clinical photography

The application of photography, with the exception of radiography, to obtain pictures of parts or the whole of a patient to make a diagnosis.

color photographic film

Film that produces color negatives or transparencies by the use of three emulsions, one coated over the other, that are each sensitive to one of the colors red, blue or green.

digital photography

A form of photography in which an electronic camera converts an image to an electronic signal that is stored in digital format on magnetic media or film.

electrophotograph

The image formed in electrophotography.

electrophotography

The photographic recording of an image formed by the alteration in electrical properties of the sensitive materials and induced by the action of light.

endoscopic photography

The photographing of objects within generally inaccessible areas using endoscopes with camera attachments.

flash photographic density filter

A filter, partially opaque to near-ultraviolet, visible and infrared radiation, that may be made by exposing and processing photographic film. Such materials are almost equally opaque to radiation of...

fluorescence photography

The photographic recording of a subject that exhibits luminescence only for an extremely short time (10-8 s) after the exciting source is removed. In the process, the subject may be illuminated by...

forensic photography

The application of ultraviolet, x-ray, infrared and conventional photography to law enforcement.

high-speed photography

Photography involving the recording of events that occur too fast to be perceived by the human eye or recorded by conventional photographic techniques. See high-speed movie camera; high-speed...

infrared photography

The photographic recording of images on a medium sensitive to infrared radiation, using a source capable of emitting in the infrared and a filter that transmits only infrared radiation.

lenticular color photography

A type of additive color photography using a lenticular structure impressed on a film base and a camera lens with a filter having three sectors of red, blue and green. Exposure of the film through...

lenticular stereo photography

A type of stereoscopic photography in which a pair of lenses focuses a pair of images, relative to the positions of the two eyes, onto film through a lenticular screen, which records the images as an...

macrophotograph

The photographic recordformed in macrophotography in which the size of the small nearby object at theimage plane is the same size or greater than the actual life size of theobject.

macrophotography

the photography of very close, and typically small objects with a magnification of approximately 1:1

metric photography

The photographic recording of objects or events in a manner that allows quantitative information to be derived from the photograph. An example is the film made by a cinetheodolite in photographing a...

microphotograph

A photograph reduced to the microscopic scale and stored on a microfilm as seen with microfiches for the purpose of storing and archiving information.

multispectral photography

The use of narrow bandpass filters and special photographic emulsions to discern features of a surface that would not be easily recognizable with regular black-and-white or color photographic methods.

ophthalmic photography

The methods and techniques used to obtain medical photographs of the human eye. To photograph the exterior of the eye, conventional still photographic equipment and procedures are used. Similarly, in...

optical density (photographic)

The transmittance of a point on a photographic negative equal to the log to the base 10 of the reciprocal of the transmittance through the negative at that point.

panchromatic photographic film

Black and white film that has a wavelength sensitivity similar to that of the eye.

radiophotograph

A photograph transmitted by radio waves.

radiophotography

The transmission of photographic images or pictures by radio waves.

reflected ultraviolet photography

A photographic method used to obtain an image of a subject by means of its reflectance of incident ultraviolet radiation. An ultraviolet source is used to irradiate the subject, while the reflected...

Schlieren photography

The formation of a picture or image in which the density gradients in a volume of flow are rendered visible. The image is formed by refraction and scattering from areas of varying refractive index.

spectrum photography

The photographic recording of visible and ultraviolet spectra on an ordinary photograph.

stereoscopic photography

The photographing of a scene from positions corresponding to the locations of both eyes. A viewing device is used to present one picture to each eye for fusion of the retinal images, giving a...

telephotography

1. A method of photographing distant objects with a lens of long focal length. 2. The reproduction of photographs over a distance by means of electricity.

thermal photography -> thermal recording

A term referring to various processes for forming visible images outside of a camera to be photographed on ordinary film. Unlike regular infrared photography, thermal photography is an indirect...

transparent electrophotographic films

Imaging materials that generally consist of a polyester base, a transparent electrically conductive layer and an organic photoconductive top coating. When charged and exposed to light, an...

ultrahigh-speed photography

Photographic recording of rapid events at a rate exceeding 106 frames per second.

ultramicrophotography

The process of microphotography that involves the reduction of the original at a ratio greater than 100 to 1. The process is usually accomplished by the use of a reduced-scale negative, which, in...

Photonics Dictionary