Method and receiver for the simultaneous detection and evaluation of at least two electro-magnetic signals
In a method and apparatus for simultaneous detection and analysis of at least two electromagnetic signals, at least one of which is a radiation image signal, using a common detector, the input radiation image is divided into at least two partial images. The partial images are projected onto a radiation detector, such that the radiation intensities of the partial images are projected from the image center of the input radiation image to the edge of the radiation image on the detector.
1. A method for simultaneous detection of at least two electromagnetic signals which are projected onto a common detector, at least one of the electromagnetic signals comprising a radiation image, said method comprising:
dividing said radiation image into at least two partial images, each partial image containing a different spatial area of said radiation image;
projecting the partial images onto a radiation detector; wherein,
in said projecting step, the partial images are projected onto said radiation detector at respective locations that are displaced from an image center of the radiation image to an edge portion of the radiation image on the detector.
2. The method according to claim 1 , wherein the partial images of the input radiation image are reflected.
3. The method according to claim 1 , wherein, for the case of a square input radiation image:
the radiation image is divided into four partial images; and
the partial images are projected at locations that are displaced from the image center of the radiation image, in the direction of a corner of the radiation image on the detector.
4. The method according to claim 3 , wherein one of the electromagnetic signals comprises a data communication signal.
5. The method according to claim 4 , wherein radiation images of celestial bodies are detected as reference objects.
6. The method according to claim 5 , wherein:
radiation images of the earth and stars are detected simultaneously; and
the radiation image of the earth is divided into partial images.
7. A receiver having a device for the simultaneous detection of at least two electromagnetic signals, at least one of which comprises a radiation image; said receiver comprising:
a radiation detector; and
at least one radiation image splitter for dividing said radiation image into at least two partial images and projecting the partial images onto the radiation detector; wherein,
each partial image contains a different spatial area of said radiation image;
said splitter is designed such that each partial image is projected onto said radiation detector at a different location that is displaced from an image center of the radiation image to an edge portion of the radiation image on the detector.
8. The receiver according to claim 7 , wherein the partial images of the input radiation image are reflected.
9. The receiver according to claim 7 , wherein:
in the case of a square input radiation image, the radiation image splitter divides the input radiation image into four spatially defined partial images; and
radiation intensity patterns of the partial images are projected at locations that are displaced from the image center of the radiation image, toward a corner of the radiation image on the detector.
10. The receiver according to claim 9 , wherein the receiver forms part of a data communication device.
11. The receiver according to claim 10 , wherein the receiver is a sensor for detection of radiation images of celestial bodies as reference objects.
12. The receiver according to claim 11 , wherein the receiver is an optical receiver.
13. The receiver according to claim 12 , wherein the receiver is a combined earth-star sensor.