DS49 LUMILEDS [Lumileds Lighting Company], DS49 Datasheet - Page 4

• Manufacturer Part Number: DS49
• Manufacturer: LUMILEDS [Lumileds Lighting Company]

Flash and Torch Mode Operation
Notes for Figures 3 and 4:
LUXEON Flash
1.
2.
3.
100
80
60
40
20
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.
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/(2
The illuminance at 3 meters is 40/(3
For flash modes, it is recommended that the drive current be as high as possible for optimal results.
0
0
DS49
200
High Uniformity Option
High Intensity Option
No Lens
(10/06)
Figure 3. LXCL PWF1.
Forw ard Current (mA)
Typical Axial Intensity (cd) and Illuminance (lux)
400
600
vs. Drive Current, T
2
) = 4.4 lux
800
1000
100
80
60
40
20
0
4
100
80
60
40
20
J
0
0
= 25ºC
200
High Uniformity Option
High Intensity Option
No Lens
Figure 4. LXCL PWF3.
Forw ard Current (mA)
400
2
) = 10 lux.
600
800
1000
100
80
60
40
20
0