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 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
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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