SPECTRA OF LOW-POWERED YELLOW LEDS (2)


This web page will be for nothing but spectra of 10mm, 8mm, 5mm, 3mm, and SMD LEDS (driven at 20mA to 60mA):

Ocean Optics USB2000 Spectrometer donated by P.L.
As of 10-10-07, I've been using a PC2000-ISA Spectrometer from Ocean Optics that I received several years ago, but that I didn't have a home for until now.
As of 03-08-08, I once again have the USB2000 spectrometer, enabling color spectra again.
As of 09-19-09, I no longer have the PC2000-ISA; it was sold to prevent an eviction.



YELLOW LEDs

Spectrographic analysis
Spectrographic analysis of an ISP "high yellow" LED.


Spectrographic analysis
Spectrographic analysis of a 5mm yellow/amber LED of unknown manufacture.


Spectrographic analysis
Spectrographic analysis of a "two chip" yellow LED from the early-1970s.
If (forward current) was just under 2mA here.


Spectrographic analysis
Spectrographic analysis of a "two chip" yellow LED from the early-1970s.
If (forward current) was just under 30mA here.


Spectrographic analysis
Spectrographic analysis of a GE SSL-1 SiC (silicon carbide) greenish yellow LED from the late-1960s.
Spectrometer's response was narrowed to a range of 390nm to 400nm to show the rather queer LED emission line at 393.9nm.


Spectrographic analysis
Spectrographic analysis of a GE SSL-1 SiC (silicon carbide) greenish yellow LED from the late-1960s.
Spectrometer plot's range was adjusted from within the included SpectraSuite software to be full-height.


Spectrographic analysis
Spectrographic analysis of the LED in the yellow Putt Tracer.
Plot is lower than desired because the product has minimal intensity.


Spectrographic analysis
A second spectrographic analysis of the LEDs in the yellow Putt Tracer.
This plot was adjusted via the SpectraSuite software to be closer to full scale.


Spectrographic analysis
Spectrographic analysis of a rectangular yellow LED harvested from an old pee-cee.


Spectrographic analysis
Spectrographic analysis of a GE SSL-1 SiC (silicon carbide) greenish yellow LED from the late-1960s.
Baseline was artificially lowered with Photoshop to show actual spectral output.
Note the unusually broadband output.


Spectrographic analysis
Same as above.
Baseline was artificially lowered with Photoshop to show actual spectral output.


Spectrographic analysis
Spectrographic analysis of the LED in the FlyTech™ Bladestar.


Spectrographic analysis
Spectrographic analysis of a 5mm yellow LED, circa. ~2005.


Spectrographic analysis
Spectrographic analysis of a 3mm diffused yellow LED from the 1980s.



Spectrographic analysis
Spectrographic analysis of a 5mm diffused yellow LED from the 1980s.














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WHITE 5500-6500K InGaN+phosphor 
ULTRAVIOLET 370-390nm GaN 
BLUE 430nm GaN+SiC
BLUE 450 and 473nm InGaN
BLUE Silicon Carbide
TURQUOISE 495-505nm InGaN
GREEN 525nm InGaN 
YELLOW-GREEN 555-575mn GaAsP & related
YELLOW 585-595nm
AMBER 595-605nm
ORANGE 605-620nm
ORANGISH-RED 620-635nm
RED 640-700nm
INFRARED 700-1300nm
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True violet (400-418nm) LEDs
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