How does a UV (UV-Cut) Filter work?

How Does a UV (UV-cut) Filter Work?

Some spectrophotometers have a filter for removing or partially removing ultraviolet (UV) radiation from the light source. If an object has fluorescent agents, UV radiation can change the apparent reflectance of an object ("apparent" to the spectrophotometer). For instance, to determine if an object is fluorescent, take two readings: one with the UV component included, and one with the UV component excluded. If the object has fluorescent agents, the two readings will be significantly different. The degree of fluorescence depends on the absolute amount of excitation energy present in the light source. For many fluorescent materials, the excitation wavelength is in the ultraviolet region.

Different instruments have different ways of handling UV:

Some X-Rite instruments have a changeable or adjustable UV filter, and depending on what software program you are using, we would recommend using the software program's characteristics to guide your choice.

For example, we don't recommend use of a UV filter in many of our industrial software programs, especially with Ink Formulation and the creation of color recipes.

But in the case of color management software found in most third party RIP's, the software program will often require the use of a spectrophotometer that has a UV cut filter in place.

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