Dario Cabib

... Lessons learned: technology transfer from terrestrial spectroscopy to biomedicine. Author(s): Glenn Healey; David Slater. Raman chemical imaging using ... Identification of cancer cells by a combination of FTIR spectroscopy and PET. Author(s): Gerald Steiner; Tom Richter; Reiner ...

A few years ago, a microlithographic deposition process on infrared-transmitting substrates was developed in order to produce realistic infrared scenes for FLIR testing. In recent months, the performance of this product, named Thermoscene, has been improved by improving the control over the production process. The two main results are: (1) An increase in the number of simulated grey levels from 15 to 290, without reduction of the total number of pixels. (2) A decrease in imperfections, such as unwanted holes in the mesh deposition, to almost zero. The Thermoscene is useful as a component of infrared simulators, to project realistic infrared scenes through collimating optics to a FLIR, missile seeker, etc., for testing purposes.

Page 1. Accurate infrared scene simulation by means of microlithographically deposited substrateDario Cabib, Joshua Eliason, Bob Hermes, Emanuel Ben—David CI Systems Ltd. POBox 147, Industrial Park, 10551 Migdal Haemek, Israel and Shai Ghilai, Ronni Bracha ...

The novel type of transparency developed for the simulation of real IR scenes consists of a half-tone mesh of variable-size holes which, when placed in front of a blackbody, simulates a two-dimensional radiance emittance pattern. The pattern may be generated from the thermal image of any real object seen by a high-performance FLIR, or from an artificially-generated computer image, or from a combination of the two. Illustrative thermoscene samples and radiation distribution measurements over a simple pattern are shown, and potential applications are discussed.

Preliminary measurements of the atmospheric transmittance spectrum along horizontal paths up to 44 km in length have been made. The equipment, a collimated radiation source and a moderate-resolution measurement system, is described in some detail, and also the method of processing the results. Some examples of measured spectra are shown and compared with the prediction of the LOWTRAN 4 program.

As more and more spectral ranges are used by different threat detecting sensors, the effectiveness of a countermeasure is becoming more and more dependent on how similar its emitted spectrum is to the object that it is supposed to simulate. As a result, the need to model and test the countermeasure radiometric output (in radiance units) and contrast (in radiant intensity units) or effective temperature at different wavelengths simultaneously increases in importance during both R&D and production for both the producer of countermeasures (to confuse the seekers) and the producer of missile seekers (to prevent seeker confusion). We have developed a family of multi-spectral radiometers (ColoRad) specifically designed to quantitatively measure countermeasure spectral signatures dynamically for precise characterization. In this paper we describe the design of such instrumentation, including the various modes of operation and highlighting the important instrument features for the present application. In addition an example of measurement is given here to demonstrate its usefulness. The ColoRad performance parameter values are also given in this paper.

A common path interferometric element introduced in the optical path of an imaging device is a well documented method to perform multidimensional spectroscopy. Recent design modifications however have provided significant improvements including enhanced spectral resolution and optical throughput, reduced acquisition time, as well as reduced instrument weight and volume. The new design will be reviewed in addition to its impact on three applications: spectral karyotyping, spectral imaging of the human ocular fundus and remote sensing of water reservoirs.

Abstract. Karyotype analysis by means of chromosome banding techniques is the pillar of cytogenetic diagnostics, both in the clinical and in the cancer cytogenetic laboratory. Using chromosome banding alone, however, a disturbingly high number of chromosomal aberrations cannot ...

A computerized IR spectroradiometer system, SR-5000, is described. The SR-5000 is composed of an optical head, the same as that used in the SR-1000 model, and a new PV/TX computer system. Besides the capability to acquire and process the spectroradiometer's signals, the PC/XT system can store and calibrate curves in the memory, control and display the radiometer parameters, and calibrate and display the calibrated spectra in Watt/sq cm per sr and other units. In addition, the new computer system offers the capabilities of automatic control of position and temperature of samples to be measured and modularity of subsystems and software packages.

A spectroradiometer was modified to test the stability, uniformity, and accuracy of radiance differentials of state-of-the-art FLIR test systems. It is shown that the radiometric tests make it possible to obtain important information which cannot be obtained with conventional contact temperature probes. The output radiance of the FLIR test equipment was measured as a function of time and angle with respect to the collimator optical axis.