Catalog excerpts
SUPER-QUIET XENON LAMP SUPER-QUIET MERCURY-XENON LAMP
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●SUPER-QUIET XENON LAMP These are lamps filled with xenon gas that emits "white light" at a high color temperature of 6000 K, which is close to that of sunlight and covers a broad continuous spectrum (185 nm to 2000 nm) from the UV to infrared region. These xenon lamps are ideal as light sources for various types of photometric instruments such as spectrophotometers. 102 150 W SUPER-QUIET XENON LAMP (L2273) SOLAR RADIATION ON SEA SURFACE (AT ZERO METER ABOVE SEA LEVEL) SOLAR IRRADIANCE ON SEA SURFACE (mW·cm2·nm-1) Figure 1: Spectral irradiance ●No arc point shift ●High stability Super-quiet...
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ARC POINT "INSTABILITY (FLUCTUATION)" AND "SHIFT" Light source lamps used for high precision photometry must have good arc emission point stability. However, cathodes used in conventional lamps have two shortcomings in terms of arc stability. One problem is that the arc emission point shifts intermittently due to inadequate electron emission from the cathode. The other problem is that the arc point shifts a little at a time due to the cathode tip wear that occurs with operating time as the lamp ages. Hamamatsu super-quiet lamps employ a high performance "BI (Barium-Impregnated) cathode"...
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STRUCTURE AND OPERATION These lamps have an oval bulb in which a cathode and an anode face each other. The bulb for super-quiet xenon lamps is filled with high-purity, high-pressure xenon gas. The bulb for super-quiet mercury-xenon lamps is filled with a mixture of high-purity, high-pressure xenon gas and high-purity mercury. The lamps emit light by arc discharge. The lamps are installed vertically or horizontally with the anode at the upper side (some types of lamps are only installed vertically) and operate on DC (when the specified voltage is supplied across the anode and cathode, the...
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●DIFFERENCE IN IRRADIANCE BY BULB MATERIAL ●DIRECTIVITY (LIGHT DISTRIBUTION) The irradiance slightly differs between fused silica and low ozone fused silica used as the window materials for lamps. So select the window material that matches your application. The lamps emit a directivity uniformly along the horizontal direction. Figure 8: Irradiance Comparison of Different Bulb Materials 150 W SUPER-QUIET XENON LAMP IRRADIANCE (µW·cm-2·nm-1) at 50 cm Figure 10: Directivity (light distribution) (vertical installation) 150 W SUPER-QUIET XENON LAMP (L2273) 200 W SUPER-QUIET MERCURY-XENON LAMP...
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●LIGHT OUTPUT INTENSITY AND LAMP CURRENT ●LIGHT OUTPUT INTENSITY AND AMBIENT TEMPERATURE The light output intensity of a lamp is proportional to the lamp current. The light output intensity of a lamp also varies with ambient temperature. This is due to the change in light output intensity resulting from the change in gas pressure in the bulb with temperature. The ambient temperature must be kept constant to ensure stable lamp operation. Figure 12: Light output intensity vs. lamp current 150 W SUPER-QUIET XENON LAMP (L2273) 140 RELATIVE IRRADIANCE (%) Operating conditions Ambient temp.: +25...
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POWER SUPPLY Lamps used as a light source for photometric applications must provide stable light output. To ensure stable lamp operation, the power supply must also provide high stability equal to or better than that of the lamp. Figure 15: Block diagram of power supply SUPER-QUIET XENON LAMP SUPER-QUIET MERCURY-XENON LAMP STARTER TRIGGER TRIGGER TRANSFORMER SWITCH CONSTANT DC CURRENT POWER SUPPLY POWER SUPPLY ●POWER SUPPLY Besides supplying the lamp with stable DC power, the power supply gives the cathode an optimal operating temperature. The cathode temperature is very important for lamp...
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SPECIFICATIONS SUPER-QUIET XENON LAMP Type No. Lamp rating Arc length (W) Lamp current Lamp voltage Window material (Spectral distribution) (nm) Light output stability Drift Fluctuation (p-p) Typ. Max. (%/h) (%) Low ozone fused silica (185 to 2000) L14285-01 Low ozone fused silica (185 to 2000) Low ozone fused silica (185 to 2000) Low ozone fused silica (185 to 2000) SUPER-QUIET MERCURY-XENON LAMP Type No. Lamp rating Arc length Lamp current Lamp voltage Window material (Spectral distribution) Light output stability Drift Fluctuation (p-p) Typ. Max. (%/h) (%) NOTE: AThe life end is defined...
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Guaranteed Average life life (h) Cooling method Trigger voltage Power supply Dimen+ sional Weight Starter + outline Lamp housing (g) Guaranteed Average life life Cooling method Trigger voltage Power supply Dimen+ sional Weight Starter + outline Lamp housing (g) Vertical ±15 or horizontal ±15 Vertical ±15 or horizontal ±15 Forced air cooling Forced air cooling Forced air cooling DPower supplies should be used in combination with a starter or lamp housing (See "POWER SUPPLY + STARTER + LAMP HOUSING COMBINATIONS" and "STRUCTURES" on pa
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DIMENSIONAL OUTLINES (Unit: mm) 1 SUPER-QUIET MERCURY-XENON LAMP: L2421 METAL BASE METAL BASE SUPER-QUIET XENON LAMP: L2174-01, L14285-01, L10725-01 SUPER-QUIET MERCURY-XENON LAMP: L2481-01, L2422-01, L8029/-01 SUPER-QUIET XENON LAMP: L2174-02, L14285-02, L10725-02 SUPER-QUIET MERCURY-XENON LAMP: L2481-02, L2422-02 M2.3
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6 SUPER-QUIET MERCURY-XENON LAMP: L8706 M5 METAL BASE METAL BASE POWER SUPPLY + STARTER + LAMP HOUSING COMBINATIONS SUPER-QUIET XENON LAMP: L2479 SUPER-QUIET MERCURY-XENON LAMP: L2483, L8288 M5 Lamp housing Structure E2419 / -01 NOTE: AStarter is supplied as an necessary. BHas an internal starter. See also pages 9, 12 and 13. LAMP HOUSING POWER SUPPLY LAMP HOUSING (INTERNAL STARTER)
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POWER SUPPLY Lamps used as the light source for high precision photometry must provide stable light output intensity. We recommend using Hamamatsu dedicated power supplies, which produce the maximum lamp performance, for lamp operation. We also provide OEM power supplies according to your application, so please feel free to consult us. ▲Left: C12122 Right: Starter C14632 ●SPECIFICATIONS Power supply Power supply type Enclosure type Manual / Auto Safery standards Power supply Board type Circuit method Start method Power supply NOTE: 1Manual: When the power switch is ON, pressing the lamp...
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