Photonics Dictionary

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densitometer

1. An instrument used to measure the opacity or density of dyes, pigments or dispersed particles that form an image in or on a medium, such as a photographic film. 2. A device used to measure the...

photoelectric densitometer -> densitometer

1. An instrument used to measure the opacity or density of dyes, pigments or dispersed particles that form an image in or on a medium, such as a photographic film. 2. A device used to measure the...

comparator-densitometer

A device used to project a reference spectrum next to a spectrum to be analyzed to provide visual comparison.

equalized-response densitometer

A densitometer having a receiver that indicates when a desired radiation level has been attained.

microdensitometer

The fundamental tool of microdensitometry, the microdensitometer is an instrument used for the precise measurement of microscopic optical densities (i.e. optical absorption) by detection of faint...

plane densitometer

An instrument designed to give precise and rapid detection of changes in tumor growth as well as the location of small tumors by providing a three-dimensional picture of the tissue.

scanning microdensitometer

A microdensitometer that contains a scanning stage to provide simultaneous representations of position vs. density.

equidensitometry

1. The use of an electronic microdensitometer to measure points of equal density on a photographic deposit. 2. A technique that simplifies a picture's density pattern by making a single isodensity...

microphotometer

An instrument capable of measuring the transmitted or reflected luminance from a very small area seen under a microscope. Microphotometers are the fundamental tools of microphotometry and are also...

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...

sensitometer

spectrogrammetric reading equipment

Spectra can be conveniently recorded on photographic film or plates. The portions that are occupied by regions of the recorded developed images on the film or plate can be determined with some...

spectrum measuring instrument

A traveling microscope or an automatic microdensitometer used to measure the spectrum plate obtained in a spectrograph.

Photonics Dictionary

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