Colour cameras

In the photographic field polycarbonates now complete with ABS for projector housings, whilst in cameras polycarbonates are now used in the shutter assembly, film drive, flash-cube sockets and lens holders. One popular low-cost camera recently introduced into the UK market had at least eight parts moulded from polycarbonate. Polycarbonate film is also used for photographic purposes, e.g. for quality colour fine engravings. 

Figure 4.9 Supernova 1987A captured by the HST wide Field Planetary Camera 2. (Reproduced with permission from P.Challis, R.Kirshner (Harvard Smithsonian Centre for Astrophysics) and B. Sugarman (STScI) and NASA.). (A colour reproduction of this figure can be seen in the colour section.)...

Digital noise-reduction Videonoise is related to tape quality, camera resolution and light conditions. In a video picture, pixels will change their colour ran-... 

For visual observation of the cell interior through the sapphire windows a lamp mounted behind one end is used. A mirror and stereo microscope at the other end facilitate the observation. The microscope is equipped with a normal camera or a video camera. Normally the phenomena within the cell are continuously observed and controlled with video camera and colour monitor. A video recorder serves for documentation, for inspection of short time processes and for the production of standing flame pictures for size and shape determination. Instead of the microscope a Jarrell-Ash diode array rapid scan spectrometer can be attached to the cell to obtain flame spectra in the visible and UV-regions. 

The polished surfaces of polycrystalline Al, Cu, Ni and Si(p) and monocrystalline samples of Mo, Si(m) and W were tested to choose the best substrate providing maximal colour contrast. The surface of the substrate was chemically polished to provide mirror reflection. Thin blood smears of the same patient were deposited under the same experimental conditions. After air drying for 10 min, blood samples were placed on the microscope holder. The images were taken by a digital camera. 

Many photographic products are based on the photolysis of silver halides. These materials are especially suitable for use where short exposure times are needed. Thus, high speed photographic films are manufactured for use in cameras. Also, coatings of silver halide on paper are utilized in the on-line production of colour reflection prints where rapid passage through an exposure device is necessary. 

Extra colour negative films (400 ISO), batteries for the camera and flash must be carried in the field. 

Fig. 2.8 (a) and (b) are thermographic pictures, recorded with the IR camera above the reactor system (Fig. 2.4) under typical reaction conditions 1% hydrocarbon in synthetic air, 375 °C and GHSV 3000 h 1. The thermogram is emissivity corrected for these conditions. The homogeneous temperature distribution of the reactor temperature (375 °C, black surface background in Fig. 2.8) is evident Each deviation from a homogeneous temperature distribution would result in colour gradients in Fig. 2.8. The result of several measurements with thermocouples around the catalyst positions of the reactor system support the finding recorded via I R-thermography on the reactor surface. The maximal temperature deviation found is below 1 °C.

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