ASTM E1390 PDF

Historical Version s - view previous versions of standard. More E This specification provides the recommended minimum requirements for industrial radiographic illuminators used for viewing industrial radiographic films using transmitted light sources. The function of the illuminator is to provide sufficient illumination and viewing capabilities for the purpose of identification and interpretation of radiographic images. The luminance of the transmitted light shall not be less than 30 candelas per square metre for film densities equal to or less than 2. If the illuminator has a diffusing screen, the light shall be sufficiently divergent so that both eyes of the observer receive rays from all parts of the screen.

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Luminance is brightness of light source -. If you are looking at a particular density of X-Ray film you need a given level of light to meet the code requirements.

Here are the units that luminance is measure. Illumination is ambient light level like you would measure in a room or work place. If you are doing visual inspection or under UV light you would need a certain level of light. Here are the units that illumination is measure.

These are for the manufacture and show the limits of film densities that the viewer can be used for. A film viewer does not have to achieve 4 density to meet code requirements - it may be designed for only lower density films. This guide provides the recommended minimum requirements for illuminators used for viewing industrial film radiographs using transmitted light. Abstract This specification provides the recommended minimum requirements for industrial radiographic illuminators used for viewing industrial radiographic films using transmitted light sources.

The function of the illuminator is to provide sufficient illumination and viewing capabilities for the purpose of identification and interpretation of radiographic images Film viewer manufactures talk about luminance or brightness of their film viewers but it is the transmitted light that transmitted from the viewer through the film to operator that is most important.

Both codes give these requirements. The luminance of the transmitted light shall not be less than 30 candelas per square meter for film densities equal to or less than 2. There are two US codes i.

Both codes mention luminance and candela - even though they are US codes Interestingly Film viewer manufactures talk about luminance or brightness of their film viewers but it is the transmitted light that transmitted from the viewer through the film to operator that is most important.

Use keywords to find the product you are looking for. Advanced Search. About Brightness or Luminance.

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Standard Specification for Illuminators Used for Viewing Industrial Radiographs

Luminance is brightness of light source -. If you are looking at a particular density of X-Ray film you need a given level of light to meet the code requirements. Here are the units that luminance is measure. Illumination is ambient light level like you would measure in a room or work place. If you are doing visual inspection or under UV light you would need a certain level of light. Here are the units that illumination is measure. These are for the manufacture and show the limits of film densities that the viewer can be used for.

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