Image detector with reduced parasitic light
First Claim
1. An image detector comprising a surface sensitive to photon radiation and protected from the external environment by a transparent window with an internal diopter and an external diopter which is integral with a housing and is placed in front of said sensitive surface, the sensitive surface having a surface quality capable of generating radiation reflections over angles of up to several dozens of degrees relative to the direction of mirrored deflection on said surface, characterized in that said window which forms part of the detector is formed by a transparent, non-diffusing medium which attenuates the photon radiation, in that said internal diopter is at a distance from said sensitive surface which is smaller than or at most equal to about 25 μ
- m, and in that the external diopter is sufficiently far removed from said sensitive surface such that the reflection of the radiation coming from the source of maximum radiation off of said external diopter has a level, on said sensitive surface, which is lower than that of the direct radiation coming from the source of minimum radiation which is to be detected.
2 Assignments
0 Petitions
Accused Products
Abstract
An image detector includes a surface sensitive to photon radiation which is protected from the external environment by a transport window with an internal diopter and an external diopter which is integral with a housing and is placed in front of the sensitive surface. In order to eliminate the phenomenum known as "blooming" due to parasitic reflections causes by intense radiation, the window is formed by a transparent, nondiffusing medium which attenuates photon radiation, with the internal diopter of the window being at a distance from the sensitive surface which is smaller than or at most equal to several times the resolution distance of the detector. Additionally, the external diopter is sufficiently far removed from the sensitive surface such that the first reflection of the radiation coming from a source of maximum radiation will have a level, on the sensitive surface, which is lower than that of the direct radiation coming from a source of minimum radiation which is to be detected.
10 Citations
8 Claims
-
1. An image detector comprising a surface sensitive to photon radiation and protected from the external environment by a transparent window with an internal diopter and an external diopter which is integral with a housing and is placed in front of said sensitive surface, the sensitive surface having a surface quality capable of generating radiation reflections over angles of up to several dozens of degrees relative to the direction of mirrored deflection on said surface, characterized in that said window which forms part of the detector is formed by a transparent, non-diffusing medium which attenuates the photon radiation, in that said internal diopter is at a distance from said sensitive surface which is smaller than or at most equal to about 25 μ
- m, and in that the external diopter is sufficiently far removed from said sensitive surface such that the reflection of the radiation coming from the source of maximum radiation off of said external diopter has a level, on said sensitive surface, which is lower than that of the direct radiation coming from the source of minimum radiation which is to be detected.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
Specification