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6494 Views 1 Reply Latest reply: Jan 14, 2012 10:08 PM by MikeWeed RSS
Novice
mikedy
Currently Being Moderated

Jan 14, 2012 6:02 AM

Small LED at 470nm

I need a small, blue, flat LED with good wavelength coverage of 470nm.

 

I’m replicating an experiment which uses this LED:

 

NFSB036BT
http://www.all-tronic.com/pdf/NFSB036B.pdf

 

Its hard to find, so I found a digikey alternative.

 

OVS5MBBCR4

http://dkc3.digikey.com/PDF/US2011/P2884.pdf
http://www.optekinc.com/datasheets/OVS5MABCR4.pdf

 

Can someone tell me if there is a major difference in the emitted light spectrum of both LEDS.

 

From what I can tell, the NFSB036BT may be better suited for 470nm, since it mentions 470nm on the first graph on page 11.

 

All I really care about is enough lumens at 470nm.  Can the OVS5MBBCR4 deliver the same amount of lumens as the NFSB036BT at 470nm?

 

What do you think?

  • MikeWeed Novice
    MikeWeed
    51 posts since
    Oct 21, 2011
    Currently Being Moderated
    Jan 14, 2012 10:08 PM (in response to mikedy)
    Small LED at 470nm

    The OVS5MBBCR4 appears to be a close match to the NFSB036BT.  The NFSB036BT data sheet shows a peak wavelength at 472 nm at 20 degrees C, and an intensity of 4.1 lumens with 150 ma current.

    The OVS5MBBCR4 peak wavelength is not so tightly spec'd, but appears to be 465 nm + or - 5nm,

    and produces 6 lumens at 150 nm current. Probably your experiment will not be sensitive to 5 nm wavelength difference, and if it is, the slightly higher output of the alternative will make up for it

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