Abstract
We propose, evaluate, and demonstrate the performance of an IR/optical double-image experimental setup where we capture two simultaneous images of a single object, in two different spectral bands, using a single detector array. With this arrangement, we may observe rapidly changing phenomena, at a rate of more than 1000 frames per second, without the loss of the spatial information about the test subject. We describe the optical system to perform simultaneous imaging in IR for slightly inclined optical axes. We verify the actual performance by applying the experimental method to flame analysis in the mid-IR to determine the combustion efficiency.
Highlights
Several methods to measure the combustion efficiency have been presented recently to decrease the amount of undesirable by-products and utilize prudently a nonrenewable resource
Evaluate, and demonstrate the performance of an IR/optical double-image experimental setup where we capture two simultaneous images of a single object, in two different spectral bands, using a single detector array
We describe the optical system to achieve concurrent imaging in two IR spectral bands with precise point-to-point registration in the focal plane to allow taking ratio of detected radiation integrated over the corresponding pixel locations
Summary
Several methods to measure the combustion efficiency have been presented recently to decrease the amount of undesirable by-products and utilize prudently a nonrenewable resource. The design simplicity compensates for the loss of multispectral imaging capability This tradeoff allows for the incorporation of additional features, as, for example, the possibility of recording detailed temporal information for the analysis of image evolution. A traditional method of recording bispectral images involves taking images of an object in succession, upon changing a filter each time [13, 14] This technique limits the procedure to capturing relatively slow phenomena where temporal changes take place at a rate slower than the time to change the filter. We describe the optical system to achieve concurrent imaging in two IR spectral bands with precise point-to-point registration in the focal plane to allow taking ratio of detected radiation integrated over the corresponding pixel locations.
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