Densitometer is a device that measures the degree darkness in photographic or semitransparent material. The desitometer is basically a light source aimed at a photoelectric cell which determines the density of the sample from differences in the readings. Modern ones have the same components but also have electronic integrated circuitry for better reading. There are 2 types which are: A solar cell, a form of photovoltaic cell, is a device that uses the photoelectric effect to generate electricity from light, thus generating solar power (energy). ... Look up Electronic in Wiktionary, the free dictionary Electronic can refer to many things: Objects related to electronics The band Electronic. ... There are many kinds of circuit An electric circuit interconnects electrical elements. ...
Reflection densitometers that measure light reflected from a surface.
Transmission densitometers that measure transparent materials
Prism splitting light Light is electromagnetic radiation with a wavelength that is visible to the eye or, in a technical or scientific setting, electromagnetic radiation of any wavelength. ...
See also
Densitometry Principle of spot light densitometry Densitometry is the quantitative measurement of optic density in light-sensitive materials, such as photographic film, due to exposure to light. ...
In general, it is known to use a Brice type densitometer for measuring the declination of light based on the difference of the refractive index and a Fresnel reflection densitometer for detecting the variation of energy of the reflected light as a difference of the refractive index.
Although the latter Fresnel type densitometer is in commercial use, with this apparatus, it is necessary to adjust the optical axis of the incident and reflected light because the refractive indices of the media for measurement are different.
In the densitometer of the invention, a reflection of the partial light passed from the first gasket element through the packing element on the surface of the gasket is prevented by inserting the second glass elements between the first packing element and the first gasket and between the second packing element and the second gasket.
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