Back to results
US 6,655,675 B2Granted
X-ray detector offering an improved light yield
AssigneeKoninklijke Philips Electronics N.V.
InventorsWalter Rütten, Matthias Simon
Life of this patent
Estimating the term…
Abstract
The invention relates to an X-ray detector for converting X-rays (27) into electric charges, including a scintillator arrangement (21) and a photosensor arrangement (28) which is situated therebelow; the light that is incident in openings Z between the pixels P is reflected to the photosensor D by means of a reflector arrangement (23) so that it contributes to an increased signal without degrading the spatial resolution of the X-ray detector.
Claims20
An X-ray detector for converting X-rays into electric charges, comprising:
- a photosensor arrangement having photosensitive elements separated from one another such that spaces are formed between the photosensitive elements;
- a scintillator arrangement arranged on a first side of the photosensor arrangement,
- at least one additional layer arranged adjacent the scintillator arrangement to form a transition between the scintillator arrangement and the at least one additional layer enabling the reflection of light, and
- a retroreflector arrangement arranged on a second side of the photosensor arrangement opposite from the first side, whereby light passing through the spaces between the photosensitive elements is reflected by the reflector arrangement toward the scintillator arrangement and the at least one additional layer and then reflected at the transition between the scintillator arrangement and the at least one additional layer back toward the photosensitive elements.
1 more element
An X-ray detector for converting X-rays into electric charges, comprising:
- a photosensor arrangement having photosensitive elements separated from one another such that spaces are formed between the photosensitive elements;
- a scintillator arrangement arranged on a first side of the photosensor arrangement,
- a substrate arranged underneath the photosensor arrangement for supporting the photosensor arrangement, and
- a retroreflector arrangement arranged on a second side of the photosensor arrangement opposite from the first side and underneath the substrate, the reflector arrangement having a reflectivity of at least 90° in a spectral range of from about 450 nm to about 600 nm,
- whereby light passing through the spaces between the photosensitive elements is reflected by the reflector arrangement toward the scintillator arrangement and then reflected back toward the photosensitive elements.
2 more elements
An X-ray detector for converting X-rays into electric charges, comprising:
- a photosensor arrangement having photosensitive elements separated from one another such that spaces are formed between the photosensitive elements;
- a scintillator arrangement arranged on a first side of the photosensor arrangement,
- a substrate arranged underneath the photosensor arrangement for supporting the photosensor arrangement,
- a retroreflector arrangement arranged on a second side of the photosensor arrangement opposite from the first side, the reflector arrangement comprising a metal layer arranged on an upper side of the substrate below the photosensitive elements and the spaces between the photosensitive elements, whereby light passing through the spaces between the photosensitive elements is reflected by the reflector arrangement toward the scintillator arrangement and then reflected back toward the photosensitive elements, and
- a reset arrangement arranged below the substrate for resetting the photosensitive elements,
- the metal layer having a reflectivity of not more than about 90% to enable reset light from the reset arrangement to pass through the metal layer to reset the photosensitive elements.
3 more elements
An X-ray detector for converting X-rays into electric charges, comprising:
- a photosensor arrangement having photosensitive elements separated from one another such that spaces are formed between the photosensitive elements;
- a scintillator arrangement arranged on a first side of the photosensor arrangement,
- a substrate arranged underneath the photosensor arrangement for supporting the photosensor arrangement, and
- a reflector arrangement arranged on a second side of the photosensor arrangement opposite from the first side,
- the reflector arrangement comprising retroreflectors having a geometrical structure to reflect incident light back in the direction of incidence or cylindrical concave mirrors.
2 more elements
Dependencies are inferred from the claim text.