SYSTEMS DIVISION LL07 RANGE MINIATURE FLUORESCENT BULBS THE LL07 RANGE OF MINIATURE FLUORESCENT BULBS MECHANICAL DATA Dimensions in mm 7.0 FEATURES: • SMALL SIZE • WIDE RANGE OF SPECTRAL OUTPUTS: 11.0 16.5 UV,BLUE, WHITE, GREEN, AND RED Anode • • • • • Cathodes APPLICATIONS: 6.0 39.0 LOW VOLTAGE SUPPLY HIGH RADIANT INTENSITY HIGH MODULATION FREQUENCY LONG LIFE TIME LOW COST 5.0 Phosphor Coating Anode Mercury Atoms • • • • MEDICAL INSTRUMENTS METROLOGY ILLUMINATION ENGINEERING FLUORESCENT / PHOSPHORESCENT MEASUREMENTS Electrons 1KOhm • ENVIRONMENTAL MONITORING Heated Cathode 5.3V 24V 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: [email protected] Fax (01455) 552612. Web site: http://www.semelab.co.uk Prelim. 10/98 SYSTEMS DIVISION LL07 RANGE MINIATURE FLUORESCENT BULBS SPECIFICATIONS (At 25°C 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 Minimum Typical Maximum Notes Unit Anode Voltage 23 24 25 Anode Current 11.5 13.0 14.5 Anode Resistance 990 1000 1010 * Cathode Voltage 5.2 5.3 5.4 V Cathode Current 39 43 47 2 mA Bulb Wall Temperature 40 60 70 3 *C V 1 mA 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. Spectral Plot of Red Fl Spectral Plot of Green Fl 100 Relative Intensity (%) Relative Intensity (%) 100 80 60 40 20 80 60 40 20 0 0 200 300 400 500 600 700 200 800 300 400 Wavelength (nm) Spectral Plot of Blue Fl 600 700 800 700 800 Spectral Plot of Ultra-violet Fl 100 100 Relative Intensity (%) Relative Intensity (%) 500 Wavelength (nm) 80 60 40 20 80 60 40 20 0 200 0 300 400 500 600 700 800 200 300 Wavelength (nm) 400 500 600 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: [email protected] 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 Relative Intensity (%) 100 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 Blue LL07B 1600 Green LL07G 7000 Red LL07R 2700 0.290 0.350 0.130 0.075 0.223 0.645 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: [email protected] Fax (01455) 552612. Web site: http://www.semelab.co.uk. Prelim. 10/98