200 - 500 W Hg Research Arc Sources

Three different Hg arc lamps of varying output powers are offered with these light source kits. Pick the lamp that provides adequate excitation power without saturating the system. Mercury lamps produce UV radiation and ozone. In addition to wearing protecting clothing, eyewear, and gloves to protect from UV radiation, the lamp should also be operated in an environment with proper ventilation or outdoors to avoid exposure to ozone. If this operating environment is not possible, an Ozone Eater should be used.

The OPS-A500 power supply provided with these light sources is a highly regulated power supply. Much of an arc lamp's stability in wavelength and output intensity is due to keeping the temperature and pressure of the gas inside the lamp's envelope as constant possible. The OPS-A500 power supply provides highly stable voltage and current supply to the arc lamp, keeping the arc lamp's ripple to less than 1% rms while maximizing the lifetime of the lamp.

All Oriel Research Arc Lamp Housings include a built-in ignitor board and rear reflector for optimum lamp performance. A built-in cooling fan maintains a safe operating temperature for the lamp. The user is protected from accidental exposure to UV radiation and electrical shock by the lamp housing's safety interlock, which disables ignition and power to the lamp if the housing door or lamp housing interconnection cable is not securely connected. These five lamp housing options differ in the condenser lens assembly mounted. Condenser lens assemblies differ in the type of lens used and f/#. Three specific lens types are used in Oriel's Research Lamp Housings:

• Plano Convex: Most economic lens option, utilizes an asymmetric lens shape to minimize spherical aberration
• Aspheric: The front surface of an aspheric lens gradually changes in curvature from the center of the lens to the edge. This shape reduces spherical aberration more effectively than a Plano Convex Lens
• Aspherab™: This lens configuration provides the highest quality output light. Four different lenses are used in a unique configuration to provide light output that is nearly free from spherical aberration. These condenser lenses also differ in f/#. A smaller f/# means the lens is placed closer to the light source inside the lamp housing. This allows for greater radiant flux as more light is collected by the lens. However, this also causes greater lens aberration. As a result, more light does not mean more quality light. Higher f/#'s are suggested if a high quality collimated beam is needed from the output of the lamp housing. However, lower f/#'s are suggested for coupling to a monochromator due to their higher throughput.

The 67005 uses a two element aspheric lens configuration with an f/# of f/1.

The 66901 uses a single plano-convex lens with an f/# of f/1.5.

The 66902 uses a single plano-convex lens with an f/# of f/2.

The 67001 uses a single aspheric lens with an f/# of f/2.2.

The 66905 contains the highest performance lens configuration Oriel offers, using a four-element Aspherab lens configuration with an f/# of f/0.7. This lamp housing also contains a 3 inch flange on the output instead of the typical Oriel 1.5 inch flange. This larger flange size allows for a greater irradiation area.

Each light source includes an Hg arc lamp, appropriate socket adapter, lamp housing interconnection cable, power supply, and Research Lamp Housing. After a quick and easy assembly, the light source is ready for use and easily integrated into a user's setup. The lamp housings offered with these light source kits are capable of operating all 50-500 W DC arc lamps. This allows the user to interchange lamps in their setup simply by replacing the lamp, socket adapter, and lamp housing interconnection cable (if necessary) in their lamp housing.