Lamp housing

Spectral dependence of a xenon lamp on electrical operating parameters. (Courtesy of Xenon Corporation.) 

Only a perfectly smooth surface exhibits directed (specular) reflection, i.e., where the angle of reflectance equals the angle of incidence. This, however, is not the case under real-life conditions, where the surface micro-roughness cannot be avoided, and consequently, the UV can be slightly diffused over a finite range of reflection angles. 

UV reflectors also reflect radiation energy in the visible and infrared (IR) energy spectral regions at least as efficiently as in the UV region. This is undesirable in such cases where the substrate or the piece being irradiated is heat sensitive. To overcome this, the surface of the reflector is coated with 

Example of a cold mirror reflector. (Courtesy of Horde UV America.) 

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The newer improved heat-resistant grades are finding use in saucepan handles, saucepan lid knobs, lamp housings, cooker handles, welding tongs and electric iron parts. 

Small scale test runs prior to preparative irradiation experiments may be carried out in tubes which are either taped to the lamp housings (immersion wells) depicted in Figures 13-1 and 13-2 or placed in turntable reactors ( merry-go-rounds ). These arrangements permit the simultaneous irradiation of several samples, but only a fraction of the available light emission is used. In Figure 13-4 a simple reactor is shown which focusses almost all the emitted light into one sample which can be scaled up also to semi-preparative volumes. In this way the necessary irradiation time can be reduced sharply. 

Rear finishing panels, rear valance panels and rear fender extensions are realities. Tail lamp housings, both hidden and with exterior finish are in common usage. A relatively simple flight of imagination joins all these elements into a one-piece rear end panel. 

Moulded bulb sockets for electrical power stations, thermostat parts, halogen lamp housings... 

Lamp housing. The housing is designed to direct and deliver to the substrate or the part to be irradiated. The lamp housing contains the reflector that focuses the ultraviolet energy generated by the lamp. Also referred to as the irradiator. 

Suggested sensor location. 1, behind reflector near end of bulb 2, behind reflector looking at bulb and reflected energy 3, from end of lamp housing 4, through filter material or rod 5, looking up at bulb and reflector from below 6, directly under the lamp at substrate level. (Courtesy of EIT, Inc.)... 

Two basic reflector designs contained in a lamp housing The most common type of power supplies for mercury lamps with large arc lengths combine a step-up transformer and a ballast capacitor placed in the secondary circuit of the transformer. 

The lamp housing has the function to direct and deliver the energy to the substrate or piece being cured. The reflector system contained in the housing reflects the... 

Pig. 5. Reaction cell and lamp housing for monoisotopic pliorosensitizntion studies. 

High appearance exterior polyester parts spanning the width of a car. This is in the form of a combination upper grille and lamp housing as well as lower grille panels. 

Injection molded polypropylene automotive tail lamp housings. 

A soln of 3,5-dimethoxybenzyloxycarbonyl-D-Phg-Gly-OH (1.00 g, 0.00249 mol) in dioxane/HjO (1 1, 1L) was irradiated with a Hanovia 654A-36 high-pressure Hg lamp housed in a water-cooled quartz immersion well fitted with a Vycor glass filter sleeve. After 1.5 h, the solvent was removed from the soln to dryness under reduced pressure and the residue treated with a minimal volume of acetone. Filtration afforded H-D-Phg-Gly-OH yield 0.335g (65%) mp 226-228 C [a] -112 (c, 0.484 in IM HCl). 

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