THORLABS LEDD3 Series, Руководство по эксплуатации

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48 LEDD3 - FLIM LED Driver User Manual
© 2009 Thorlabs
LEDD3-470
Nominal Wavelength
470nm
Maximum Current 1000mA
Cut-off Frequency 80MHz
LEDD3-630
Nominal Wavelength
630nm
Maximum Current 1000mA
Cut-off Frequency 70MHz
1)
depending on LED type and modulation frequency
Microscope Mounting are available for the following microscopes:
·
Olympus BX/IX
· Leica DMI
·
Nikon F Mount
· Zeiss Axioskop
6.3.3
LED for Frequency Domain FLIM
The LEDD3 is a LED driver for high brightness (HB) LEDs, which can apply a sine
wave modulation to the LED in the range from 10MHz to 100MHz. A HB LED has an
internal capacity, which limits the maximum frequency. This cut-off frequency is an
intrinsic property of LED. In the following sub chapters the phase difference between
reference output and the emitted light signal are shown.
6.3.3.1
LED @ 365nm
The LEDD3-365 contains the UV LED NCSU033A from Nichia. The LED emits a
wavelength at 365nm and an optical power of up to 310mW.
G
Caution
G
This LEDD3 head radiates intense UV light during operation.
Precautions must be taken to prevent looking directly at the UV
light with unaided eyes.
Do not look directly into the UV light or look through the optical
system during operation of the device. This can be harmful to the
eyes even for brief periods due to the intense UV light.
If there is the possibility to receive a reflection of the UV light, UV
light protective glasses has to be used to prevent that UV light can
catch one's eye directly.
If viewing the UV light is necessary, use UV light protective
glasses to avoid damage by the UV light.
The 10dB cut-off frequency of the LEDD3-365 is 90MHz. The maximum current is