Magazine article American Cinematographer

A Series of New Cold Lights Useful for Medical and Other Types of Photography

Magazine article American Cinematographer

A Series of New Cold Lights Useful for Medical and Other Types of Photography

Article excerpt

The Bio-photographer now has at his command a new concept in lighting for stills and cinematography that should make him more than welcome in the operating suite

Lighting previously employed in BioPhotography has been a serious problem because of the intense heat and incorrect Kelvin color temperature in the ambient light beam.

After many years of research and development a new concept was designed in a lighting system that can now provide excellent visualization and correct visual color of tissues, organic structures, movements,: and medical procedures without trauma to the patient or doctor.

The Art Bodkins Bio-Light now makes it possible to provide 650 watts pf daylight (5500°K) with a sharp attenuatio of the infrared that provides comfort for both the patient and doctor. The Bio-Photographer has at his command a new concept in lighting for both stills and cinematography in medical and life sciences that should make him more than welcome in the operating suite.

The Art Bodkins Bio-Light, which has been successfully tested in Beth Israel Hospital in Boston, utilizes an arrangement of cold mirrors and heat transfer techniques to minimize heat reduced by infrared radiation while providing a high degree of illumination. This is accomplished by a high vacuum chamber system that deposits the multilayers of inorganic elements onto the pyrex substrates.

The Bio-Light luminaire is designed to employ a special type of PAR-36 tungsten-halogen globe that contains specially formed films on the Pyrex reflector surface which are adapted to selectively reflect substantially all of the light except for that part which lies within the infrared portion of the daylight spectrum.

Each of the PAR-36 lamps also is provided with a selective reflective coating which is adapted to reflect infrared radiation and pass the remaining portion of the spectrum which is emitted from the lamp filament. By directing the light from the filament successively against a plurality of selectively reflective surfaces, the amount of infrared radiation may be progressively decreased. To the non-tech tester, it means excellent illumination quality without the excessive heat.

The Bio-Light is one of several units developed as part of a revolutionary new lighting system introduced by ART BODKINS-OPTICS, Inc. of Boston, Massachusetts, in which a cold light beam emerges from a hot tungsten filament after passing through not one, but three heat-rejecting elements in tandem in the unit. The new unit is suitable to use in hospital operating rooms where the infrared heat component from conventional luminaires contributes to discomfort of doctor, patient and attendants, in turn delaying and harrying the medical team, and reducing the likelihood of recovery and even in some cases, the survival, jtself, of a critically ill patient.

The new light is made possible by the miracle of selective reflection and selective transmission of the radiation from the lamp. Thin, fantastically accurate, deposits of specific chemical salts are laid on the glass surfaces in elaborate high vacuum chambers to produce reflection of certain wavelengths of the light beam and allow the transmission of other wavelengths. The coatings, which may even number over a hundred in some instances, are carefully designed on the basis of the truly amazing coating technology, to pass or reflect any single wavelength or wave band to a high degree of effectiveness. …

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