Infrared photography

Diagnosis of defects by inspection of visible causes or more sophisticated means (tracer-dye inundation to find sources and routes of leaks, infrared photography, etc.) is a prerequisite for correct repair specification. Greater skill in detailing and specifying suitable materials and methods are required in the design of flat roofs and the same applies to repairs. Here, too, durability and effectiveness are, to some extent, cost related. 

Cadmium sulfide is often used in the photometers of cameras to measure the avaflnWe visible light. Suppose you were interested in infrared photography. Using Fig. 7.2S. aiggest some compounds that might be suitable for an infrared photocell. 

The scientific applications of infrared photography are numerous and important. 

Infrared photography, 25 Infrared spectra examination comparative modem plant and animal fibers, 52-54/ fiber and particulate residues from archaeological textiles, 44-77 Inorganic mineral pigments, textile fibers, 19-21/... 

Adams, E. (1999) Urban heat (an evaluation of infrared photography that shows how buildings contribute to hot pockets in cities). Architecture, 88(1) 134-135. 

A t ricarbocyanine type of dye with infrared absorbing properties peak absorption at about 800 niti. Has little or no absorption in the visible. Commercial product contains moisture and about 5% sodium iodide as contaminant. use In infrared photography in prepn of Wratten fitters. THEKap cat Diagnostic aid (blood volume determination, cardiac output, hepatic function). 

A — Tricolor red for direct color separation. Contrast effects in commercial photography and in outdoor scenes. Two-color general viewing. Aerial infrared photography and haze cutting, AAA. 

A practical example of photosensitization is in the use of certain dyes in photographic film to render the emulsion sensitive to wavelengths that are longer than those to which it ordinarily responds for example, infrared photography, which permits photographs of objects in the absence of visible light. 

Infrared photography can assess the extent of the deaths/ and there are claims that in the worst areas of the Bayerische Wald in Bavaria about 30-40% of firs on south-facing/ semi-arid slopes are dying at present. 

Another object associated with multiple reflection nebulae is CRL 437. The reflection nebula was found by Kleinmann and Lebofsky (1975) in their search for optical counterparts for new AFCRL sources by means of near-infrared photography with image tube cameras at KPNO. Direct observation of the brightest part of the complex nebula on the KPNO 1.3-m indicated at first, that the source was ten times fainter than reported in the AFCRL Catalogue. This cast doubt on the identification of the reflection nebula with... 

That all objects at room temperature emit infrared radiation is the principle behind infrared photography. An infrared camera is able to record images in the infrared region of the spectrum. 

---