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| SYSTEMS DIVISION LL07 RANGE MINIATURE FLUORESCENT BULBS MECHANICAL DATA Dimensions in mm 7.0 THE LL07 RANGE OF MINIATURE FLUORESCENT BULBS FEATURES: 11.0 16.5 * SMALL SIZE * WIDE RANGE OF SPECTRAL OUTPUTS: UV,BLUE, WHITE, GREEN, AND RED 6.0 39.0 Anode 5.0 * * * * * LOW VOLTAGE SUPPLY HIGH RADIANT INTENSITY HIGH MODULATION FREQUENCY LONG LIFE TIME LOW COST Cathodes APPLICATIONS: * * * * MEDICAL INSTRUMENTS METROLOGY ILLUMINATION ENGINEERING FLUORESCENT / PHOSPHORESCENT MEASUREMENTS Phosphor Coating Mercury Atoms Electrons Anode 1KOhm Heated Cathode 5.3V 24V * ENVIRONMENTAL MONITORING DESCRIPTION The LLO7 devices are a range of miniature fluorescent bulbs. The device structure has been designed to give maximum radiant intensity with low voltage operation. The principal difference between the miniature and a conventional fluorescent lamp is the filament cathode. When powered up, electrons are emitted from the cathode by thermionic emission. These electrons are then accelerated towards the anode due to the potential difference between the anode and cathode. The electrons collide with mercury atoms and excite an orbital electron. The electron decays to a lower energy level and emits a photon of short wavelength ultra-violet light. This photon stimulates the phosphor coating on the inside of the glass bulb. Depending on the type of phosphor used red, green, blue, white or long wavelength ultra-violet light is emitted from the device. The short wavelength ultra-violet light is absorbed by the glass bulb. See diagram. The dimensions are subject to a typical tolerance of +0.5mm. Advice on suitable materials to encapsulate the bulbs is available from Semelab Plc. Semelab Plc. reserve the right to change the products shown on this datasheet in the interest of improved specification. No responsibility is assumed for the use of information contained herein, nor for any infringement of patent or rights of others that may result from such use. No license is granted by implication or otherwise under any patent or patent right of Semelab Plc. Semelab plc Telephone (01455) 556565 E-mail: sales@semelab.co.uk Fax (01455) 552612. Web site: http://www.semelab.co.uk Prelim. 10/98 SYSTEMS DIVISION LL07 RANGE MINIATURE FLUORESCENT BULBS SPECIFICATIONS (At 25C unless otherwise stated) The electrical specifications tabulated below are a brief summary and are applicable to all the devices. For information concerning the tolerances of the stated drive voltages and the subsequent effect on the spectral properties of the device contact Semelab Plc.. Parameter Anode Voltage Anode Current Anode Resistance Cathode Voltage Cathode Current Bulb Wall Temperature Notes 1. Anode current measured for anode to cathode voltage of 24V, cathode voltage of 5.3V and an anode resistance of 1Kohm. 2. Cathode current measured for cathode voltage of 5.3V and anode to cathode voltage of 0V. Minimum 23 11.5 990 5.2 39 40 Typical 24 13.0 1000 5.3 43 60 Maximum 25 14.5 1010 5.4 47 70 2 3 1 Notes Unit V mA * V mA *C Spectral Plot of Red Fl 100 100 Spectral Plot of Green Fl Relative Intensity (%) Relative Intensity (%) 80 80 60 40 20 0 200 300 400 500 600 700 800 60 40 20 0 200 300 400 500 600 700 800 Wavelength (nm) Wavelength (nm) Spectral Plot of Blue Fl 100 100 Spectral Plot of Ultra-violet Fl Relative Intensity (%) Relative Intensity (%) 80 80 60 40 20 0 200 300 400 500 600 700 800 60 40 20 0 200 300 400 500 600 700 800 Wavelength (nm) Wavelength (nm) Semelab Plc. reserve the right to change the products shown on this datasheet in the interest of improved specification. No responsibility is assumed for the use of information contained herein, nor for any infringement of patent or rights of others that may result from such use. No license is granted by implication or otherwise under any patent or patent right of Semelab Plc. Semelab plc Telephone (01455) 556565 E-mail: sales@semelab.co.uk Fax (01455) 552612. Web site: http://www.semelab.co.uk. Prelim. 10/98 SYSTEMS DIVISION LL07 RANGE MINIATURE FLUORESCENT BULBS Spectral Plot of White Fl 100 Relative Intensity (%) 80 60 40 20 0 200 300 400 500 600 700 800 Wavelength (nm) Optical Characteristic Ultra-violet Part Number LL07UV Luminance(peak value) Radiant Intensity 2.7 Chromaticity x y White LL07W 3900 0.290 0.350 Blue LL07B 1600 0.130 0.075 Green LL07G 7000 0.223 0.645 Red LL07R 2700 0.572 0.310 Unit cd/m2 mW/sr Semelab Plc. reserve the right to change the products shown on this datasheet in the interest of improved specification. No responsibility is assumed for the use of information contained herein, nor for any infringement of patent or rights of others that may result from such use. No license is granted by implication or otherwise under any patent or patent right of Semelab Plc. Semelab plc Telephone (01455) 556565 E-mail: sales@semelab.co.uk Fax (01455) 552612. Web site: http://www.semelab.co.uk. Prelim. 10/98 |
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