1. A turbomachine combustion chamber comprising at least one substantially L-shaped fuel injector comprising an arm with one end connected to an injection head and its other end designed to be connected to fuel feed means, and means for mounting and fastening the injector in an orifice of a casing of the chamber, said means including an outer collar carried by the arm of the injector, wherein the means for mounting and fastening the injector further comprise an annular spacer surrounding the arm of the injector and interposed between the collar of said arm and the casing, said spacer being sectorized and removable during dismantling of the means for fastening the injector on the casing so as to enable the injector to pivot in the orifice in the casing.
2. A chamber according to claim 1, wherein the spacer is made up of at least two sectors placed end to end.
3. A chamber according to claim 2, wherein each spacer sector includes, at one of its circumferential ends, a projecting portion designed to engage in a recessed portion of complementary shape provided at the other circumferential end of another spacer sector so as to make the spacer easier to mount, easier to keep together while the injector is being fastened, and easier to provide sealing between its sectors.
4. A chamber according to claim 2, wherein the means for mounting and fastening the injector comprise a clamping collar surrounding the spacer sectors in order to hold them together.
5. A chamber according to claim 1, wherein the means for mounting and fastening the injector include at least one annular sealing gasket designed to be interposed between the collar of the arm and the spacer, between said collar and the casing, andor between the spacer and the casing.
6. A chamber according to claim 1, that is of substantially rectangular, triangular, or T-shaped section.
7. A chamber according to claim 1, wherein the spacer includes a spherical or frustoconical annular surface for bearing against the casing of the chamber.
8. A chamber according to claim 1, wherein the collar includes screw-fastening orifices to enable the injector to be fastened to the chamber casing and to enable the spacer to be clamped between the collar of the arm and the casing.
9. A chamber according to claim 1, wherein the means for mounting and fastening the injector comprise a removable annular clamp surrounding the arm of the injector and including screw-passing orifices for fastening the injector on the casing of the chamber and for clamping the collar of the arm and the spacer between the clamp and the casing.
10. A chamber according to claim 9, wherein the means for mounting and fastening the injector include at least one annular sealing gasket interposed between the clamp and the collar andor between the clamp and the casing.
11. A chamber according to claim 1, including an annular casing having a plurality of substantially radial orifices, each having a fuel injector mounted therein, each orifice being formed in an outer boss of the casing, the above-mentioned spacer being interposed between the collar of the injector arm and said boss.
12. A method of mounting andor dismantling a fuel injector in a combustion chamber according to claim 1, wherein the method comprises the steps consisting in removing the spacer and then in moving the injector to pivot about a transverse axis so that its head engagesdisengages infrom a mixer of the chamber.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A detector for an imaging system comprising:
an array of pixels forming rows and columns, and configured to generate signals based upon radiation impacting the detector;
a plurality of scan lines, each scan line being adapted to be coupled to a plurality of rows of pixels; and
a multiplexing circuit for selectively coupling the rows of pixels to respective scan lines for read out of the signals.
2. The detector as in claim 1, further comprising a plurality of column readout lines coupled to a plurality of columns of pixels.
3. The detector as in claim 2, wherein each column readout line is coupled to two columns of pixels.
4. The detector as in claim 1, wherein the multiplexing circuit includes a first set of switches for selecting rows of pixels for readout.
5. The detector as in claim 1, wherein the multiplexing circuit includes a second set of switches for selecting columns of pixels for readout.
6. The detector as in claim 1, wherein each scan line is coupled to two rows of pixels.
7. The detector as in claim 1, wherein the detector includes a plurality of column readout lines coupled to the pixels, and wherein the number of pixels is at least two times the sum of the number of scan lines and column readout lines.
8. The detector as in claim 1, further comprising a control circuit to regulate switching of the multiplexer circuit.
9. The detector as in claim 1, wherein each of the pixels includes a thin film transistor and a photodiode.
10. A digital imaging system, comprising:
a source of radiation;
a control circuit to regulate the source of radiation; and
a detector for receiving radiation from the source of radiation and for generating signals therefrom, the detector having an array of pixels forming rows and columns, and a plurality of scan lines, each scan line being adapted to be coupled to a plurality of rows of pixels, and a mulitplexing circuit for selectively coupling the rows of pixels to respective scan lines for read out of the signals.
11. The system as in claim 10, further comprising a plurality of column readout lines coupled to a plurality of column of pixels.
12. The system as in claim 10, wherein each column readout line is coupled to two columns of pixels.
13. The system as in claim 10, wherein the multiplexing circuit includes a first set of switches for selecting rows of pixels for readout.
14. The system as in claim 10, wherein the multiplexing circuit includes a second set of switches for selecting columns of pixels for readout.
15. The system as in claim 10, wherein each scan line is coupled to two rows of pixels.
16. The system as in claim 10, wherein the system includes a plurality of column readout lines coupled to the pixels, and wherein the number of pixels is at least two times the sum of the number of scan lines and column readout lines.
17. The system as in claim 10, further comprising a control circuit to regulate switching of the multiplexer circuit.
18. The system as in claim 10, wherein each of the pixels includes a thin film transistor and a photodiode.
19. The system as in claim 10, wherein the source of radiation is an x-ray source.
20. The system as in claim 10, further comprising data acquisition circuitry for receiving signals generated by the detector and reconstructing useful images based thereon.
21. A method for acquiring signals from discrete pixels in a detector, the detector including a matrix of rows and columns of pixels, each pixel configured to generate a signal based upon radiation received, the method comprising:
commanding a multiplexer circuit to selectively couple desired pixels of the rows and columns of pixels to enabling scan lines;
reading signals from the pixels of the desired rows and columns.
22. The method as recited in claim 21, wherein each of the scan lines is adapted for coupling to a plurality of rows of pixels via the multiplexing circuit.
23. The method as recited in claim 21, wherein the step of commanding a multiplexing circuit includes commanding a first multiplexing circuit for coupling pixels of each scan line to desired columns of pixels for read out.
24. The method as in claim 21, wherein the step of reading the signals from the pixels includes reading signals from one of a plurality of a columns of pixels coupled to a respective column of readout lines.