DS49 Datasheet, PDF (4/11 Pages) Lumileds Lighting Company – power light source LUXEON® Flash

Flash and Torch Mode Operation
Typical Axial Intensity (cd) and Illuminance (lux)
vs. Drive Current, T_J = 25ºC
100
100
100
100
High Uniformity Option
High Uniformity Option
High Intensity Option
High Intensity Option
80
No Lens
80
80
No Lens
80
60
60
60
60
40
40
40
40
20
20
20
20
0
0
0
200
400
600
800
1000
Forw ard Current (mA)
0
0
0
200
400
600
800
1000
Forw ard Current (mA)
Figure 3. LXCL PWF1.
Figure 4. LXCL PWF3.
Notes for Figures 3 and 4:
1. High Uniformity and High Intensity Options assume use of the Philips Lumileds reference design optic. The design of this
optic is available upon request.
High Uniformity option is achieved by placing the lens at 0.4 mm from the top of the emitter. This will yield uniformity of
41% (relative to the center) at the horizontal edge and 24% (relative to the center) at the corners.
Uniformity can be traded off for increased On Axis Illuminance/Intensity. This is shown in the High Intensity Option and is
achieved by placing the optic at 0.7mm from the top of the emitter. In this option, the uniformity is 17% at the horizontal
edge and 10% at the corners.
2. Illuminance is inversely proportional to the square of the distance.
For example: if the illuminance at 1 meter is 40, then the illuminance at 2 meters is 40/(2²) = 10 lux.
The illuminance at 3 meters is 40/(3²) = 4.4 lux
3. For flash modes, it is recommended that the drive current be as high as possible for optimal results.
LUXEON Flash DS49 (10/06)
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