US 12,265,016 B2
Fluorescent material as a radiation source in an apparatus for artificial weathering
Jörn Jahnke, Linsengericht-Altenhaßlau (DE); Bernd Rudolph, Alzenau (DE); and Tom Marchese, Mt Prospect, IL (US)
Assigned to ATLAS Material Testing Technology GmbH, Linsengericht-Altenhasslau (DE)
Filed by ATLAS Material Testing Technology GmbH, Linsengericht-Altenhaßlau (DE)
Filed on Dec. 1, 2021, as Appl. No. 17/540,162.
Claims priority of application No. 21152379 (EP), filed on Jan. 19, 2021.
Prior Publication US 2022/0228970 A1, Jul. 21, 2022
Int. Cl. G01N 17/00 (2006.01); G01N 1/44 (2006.01)
CPC G01N 17/004 (2013.01) [G01N 1/44 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An apparatus for artificial weathering or lightfastness testing of samples or for simulating solar radiation, the apparatus comprising:
a weathering chamber;
an ultraviolet (UV) light source provided in the weathering chamber, the UV light source consisting of a plurality of UV light emitting diodes (LEDs), each one of the plurality of UV LEDs comprising a specific maximum emission wavelength;
a fluorescent material arranged to be radiated by a UV radiation emitted by the UV light source, the fluorescent material being configured to emit a fluorescent radiation comprising spectral emission characteristics similar to natural solar radiation; and
a transparent layer, the fluorescent material being applied directly to the transparent layer in the form of a thin layer, wherein:
a layer configured to filter excessive infrared light emitted by the fluorescent material is directly disposed on one main surface of the transparent layer,
the transparent layer is in a shape of a cylinder,
the UV light source is arranged in an inner space of the cylinder, and
the apparatus is configured to rotate the samples around the fluorescent material.