Screen plate of an imaging measuring instrument
AssigneeWallac Oy
InventorJanne Salonen
Life of this patent
Estimating the term…
Abstract
Screen plate (10) of an imaging measuring instrument, intended for use in absorption measurement of samples relating to the fields of biochemistry and medicine. The screen plate comprises a plate (11) made of light-absorbing material, such as darkened or colored glass, preferably gray glass. One surface of the screen plate is provided with a scattering and/or fluorescent surface layer (12) and the opposite side is provided with an anti-reflection film (13). Instead of a scattering and/or fluorescent surface layer, the absorbing plate may also have both scattering and/or fluorescent properties.
Claims7
A screen plate (10) of an imaging measuring instrument, mainly intended for use in absorption measurement of samples relating to the fields of biochemistry and medicine, which screen plate comprises
- at least one fluorescent or light-scattering layer (12),
- at least one base layer (11), such as glass plate or plastic plate, on which the fluorescent or light-scattering layer (12) is located,
- characterized in
- that base layer (11) of the screen plate (10) is made of light-absorbing material having so small light transmission coefficient that only those light rays coming from the fluorescent or light-scattering layer (12), mainly in a direction perpendicular to the base layer, will pass through the said base layer,
- that the base layer (11) is preferably made of darkened glass or plastic, such as gray glass or gray plastic, having a light transmission coefficient below 10%.
Dependencies are inferred from the claim text.