1. An image sensing apparatus using an image sensing device having at least first and second output terminals, comprising:
first and second amplifiers that independently amplify signals that are output from the first and second output terminals, respectively;
a first gain controller that controls gain applied to said first amplifier;
memory that stores data, which relates to gain to be applied to said second amplifier, that corresponds to respective ones of a plurality of different gains to be applied to said first amplifier; and
a second gain controller that controls gain applied to said second amplifier in accordance with the data relating to gain to be applied to said second amplifier, obtained from said memory, corresponding to the gain applied to said first amplifier;
wherein the data relating to gain stored in said memory is obtained by first supplying same gain to both said first and second amplifiers, and obtaining a level ratio of signals from said first and second amplifiers at each gain with regard to a plurality of different gains.
2. The apparatus according to claim 1, wherein the data stored in said memory is calculated in a process for manufacturing said image sensing apparatus and is stored in a non-volatile memory.
3. The apparatus according to claim 1, wherein data between items of data stored in said memory is obtained by interpolation.
4. The apparatus according to claim 1, wherein said first gain controller includes:
a gain supply unit that supplies gain of a logarithmic value; and
a log-linear converter that converts the logarithmic value to a linear numerical value;
said first gain controller controlling said first amplifier by the linear numerical value obtained by the conversion.
5. The apparatus according to claim 4, wherein spacing between items of data stored in said memory is a logarithmic width.
6. The apparatus according to claim 1, further comprising:
a temperature detector that detects temperature in the vicinity of the image sensing device,
wherein said memory stores data, which relates to gain to be applied to said second amplifier, that corresponds to at least two different temperatures, and
data to be applied to said second amplifier at the detected temperature is calculated by interpolation between data relating to gains of the two different temperatures selected from the memory.
7. The apparatus according to claim 1, further comprising a photometry circuit;
wherein said first gain controller controls gain based upon a photometric value obtained by said photometry circuit.
8. The apparatus according to claim 1, further comprising a control panel that stipulates gain;
wherein said first gain controller uses gain that has been stipulated by said control panel.
9. A gain control method in an image sensing apparatus that includes an image sensing device having at least first and second output terminals, and first and second amplifiers that independently amplify signals that are output from the first and second output terminals, respectively, said method comprising steps of:
controlling gain applied to said first amplifier;
reading data relating to gain to be applied to said second amplifier from memory in accordance with gain applied to said first amplifier, the data, which relates to gain to be applied to said second amplifier, that corresponds to respective ones of a plurality of different gains to be applied to said first amplifier; and
controlling gain applied to said second amplifier based upon the data read from the memory;
wherein the data relating to gain stored in said memory is obtained by first supplying same gain to both said first and second amplifiers, and obtaining a level ratio of signals from said first and second amplifiers at each gain with regard to a plurality of different gains.
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 dual-flow turbomachine, comprising an exhaust casing linked by radial arms to coaxial cylindrical walls delimiting flow arteries for a primary flow of hot exhaust gases and for a secondary flow of cold air, wherein this turbomachine is equipped with at least one Stirling cycle thermal engine mounted at the end of a radial arm and comprising two thermal exchangers, for heating and cooling respectively a working fluid, which are formed in parts of the radial arm respectively intercepting the primary flow and the secondary flow.
2. The turbomachine as claimed in claim 1, wherein the two heating and cooling exchangers are linked by a regenerator intended to accumulate thermal energy during the cooling phase of the Stirling cycle and deliver thermal energy during the reheating phase.
3. The turbomachine as claimed in claim 2, wherein the regenerator is housed in a part of the radial arm located between the flow arteries of the primary flow and of the secondary flow.
4. The turbomachine as claimed in claim 1, wherein the Stirling engine comprises a working chamber located outside the primary and secondary flows and in which is arranged a displacing piston associated with a moving element of an energy generation system.
5. The turbomachine as claimed in claim 4, wherein the working chamber is arranged at the radially internal end of the thermal engine.
6. The turbomachine as claimed in claim 4, wherein the displacing piston is arranged in such a way as to divide in a seal-tight manner the working chamber into two zones, the first of which is linked to the heating exchanger and the second of which is linked to the cooling exchanger.
7. The turbomachine as claimed in claim 6, wherein the second zone is linked to the cooling exchanger by a thermally insulated duct passing through the heating exchanger and the regenerator.
8. The turbomachine as claimed in claim 4, wherein the displacing piston comprises a cylindrical cavity extending in the direction of displacement of the piston and inside which is mounted a fixed permanent magnet, the displacing piston being provided with a winding of electrical wire arranged around the cylindrical cavity and linked to an electrical interface to drive the displacing piston.
9. The turbomachine as claimed in claim 4, wherein the working chamber comprises a wheel linked to the moving element of the energy generation system and to the displacing piston by link rods, to drive the displacing piston.
10. The turbomachine as claimed in claim 4, wherein the Stirling engine comprises a pressurized inert gas inlet into the working chamber or one of the exchangers.
11. The turbomachine as claimed in claim 4, wherein the moving element of the energy generation system is supported by an elastic return means fixed in the working chamber and comprises a cylindrical cavity extending in its direction of displacement and inside which is positioned a fixed permanent magnet, the moving element being provided with a winding of electrical wire arranged around the cylindrical cavity and linked to an electrical interface to enable mechanical energy to be converted into electrical energy.
12. The turbomachine as claimed in claim 1, wherein the radial arm comprises thermal exchange fins on its outer andor inner surface located in the flow arteries of the primary and secondary flows.