SPECTRA (NORMAL & NARROWBAND) OF LEDs THAT M.B. SENT IN MID-DECEMBER 2011 (1)
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This web page will be for nothing but spectra of 10mm, 8mm, 5mm, 3mm, and SMD LEDS (driven at 20mA to 60mA; with the exception of the LED in the Motion-Sensing Spotlight):

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.

SPECTRA (NORMAL & NARROWBAND) OF LEDs THAT M.B. SENT IN MID-DECEMBER 2011 (1):

All spectra except those of the 700nm NIR LEDs were performed with an If (forward current) of 19.280mA; the 700nm NIR LEDs were tested at If=48.370mA (their specified continuous operating If=50mA), using an American Opto Plus LED Tester.


Spectrographic plot
Spectrographic analysis of sample #1 of a Demo Photoelectric Technology (Wuxi) Co. Ltd. # DMPT-50346-05UV415-BM-C Violetish-Blue LED.


Spectrographic plot
Spectrographic analysis of sample #1 of a Demo Photoelectric Technology (Wuxi) Co. Ltd. # DMPT-50346-05UV415-BM-C Violetish-Blue LED; spectrometer's response narrowed to a band between 390nm and 440nm to pinpoint peak wavelength, which is 413.660nm.


Power output analysis
Power output analysis of sample #1 of of a Demo Photoelectric Technology (Wuxi) Co. Ltd. # DMPT-50346-05UV415-BM-C Violetish-Blue LED.
Looks like it tops out at 12mW; this is actually a bit overspec (the specifications state the maximum power is 9mW).


Spectrographic plot
Spectrographic analysis of sample #2 of of a Demo Photoelectric Technology (Wuxi) Co. Ltd. # DMPT-50346-05UV415-BM-C Violetish-Blue LED.


Spectrographic plot
Spectrographic analysis of sample #2 of of a Demo Photoelectric Technology (Wuxi) Co. Ltd. # DMPT-50346-05UV415-BM-C Violetish-Blue LED; spectrometer's response narrowed to a band between 390nm and 440nm to pinpoint peak wavelength, which is 414.112nm.


Power output analysis
Power output analysis of sample #1 of of a Demo Photoelectric Technology (Wuxi) Co. Ltd. # DMPT-50346-05UV415-BM-C Violetish-Blue LED.
Looks like it too tops out at 12mW; this is actually a bit overspec (the specifications state the maximum power is 9mW).


Spectrographic plot
Spectrographic analysis of sample #1 of an unknown-type 405nm NUV LED.


Spectrographic plot
Spectrographic analysis of sample #1 of an unknown-type 405nm NUV LED; spectrometer's response narrowed to a band between 380nm and 420nm to pinpoint peak wavelength, which is 402.350nm.


Power output analysis
Power output analysis of sample #1 of an unknown-type 405nm NUV LED.
Looks like it tops out at 10mW -- though the wavelength may be too short for my power meter to read correctly.
Also, the published power output measurements are generally for unencapsulated LEDs -- the epoxy body tends to "eat" quite a bit of the power through absorption and total internal reflection, especially at shorter wavelengths.


Spectrographic plot
Spectrographic analysis of sample #2 of an unknown-type 405nm NUV LED.


Spectrographic plot
Spectrographic analysis of sample #2 of an unknown-type 405nm NUV LED; spectrometer's response narrowed to a band between 380nm and 420nm to pinpoint peak wavelength, which is 405.155nm.


Power output analysis
Power output analysis of sample #1 of an unknown-type 405nm NUV LED.
Looks like it tops out at 13mW -- though the wavelength may be too short for my power meter to read correctly.
Also, the published power output measurements are generally for unencapsulated LEDs -- the epoxy body tends to "eat" quite a bit of the power through absorption and total internal reflection, especially at shorter wavelengths.


Spectrographic plot
Spectrographic analysis of sample #1 of a Roithner Lasertechnik # RL5-UV0315-380 380nm UVA LED.


Spectrographic plot
Spectrographic analysis of sample #1 of a Roithner Lasertechnik # RL5-UV0315-380 380nm UVA LED; spectrometer's response narrowed to a band between 370nm and 400nm to pinpoint peak wavelength, which is 381.850nm.


Power output analysis
Power output analysis of sample #1 of a Roithner Lasertechnik # RL5-UV0315-380 380nm UVA LED.
Looks like it tops out at 6mW, which is well below spec for this LED -- though the wavelength may be too short for my power meter to read correctly.
Also, the published power output measurements are generally for unencapsulated LEDs -- the epoxy body tends to "eat" quite a bit of the power through absorption and total internal reflection, especially at shorter wavelengths.


Spectrographic plot
Spectrographic analysis of sample #2 of a Roithner Lasertechnik # RL5-UV0315-380 380nm UVA LED.


Spectrographic plot
Spectrographic analysis of sample #2 of a Roithner Lasertechnik # RL5-UV0315-380 380nm UVA LED; spectrometer's response narrowed to a band between 370nm and 400nm to pinpoint peak wavelength, which is 380.220nm.


Power output analysis
Power output analysis of sample #2 of a Roithner Lasertechnik # RL5-UV0315-380 380nm UVA LED.
Looks like it tops out at 9mW, which is well below spec for this LED -- though the wavelength may be too short for my power meter to read correctly.
Also, the published power output measurements are generally for unencapsulated LEDs -- the epoxy body tends to "eat" quite a bit of the power through absorption and total internal reflection, especially at shorter wavelengths.


Spectrographic plot
Spectrographic analysis of sample #1 of a YULI # YLIR-700 700nm deep red LED.


Spectrographic plot
Spectrographic analysis of sample #1 of a YULI # YLIR-700 700nm deep red LED; spectrometer's response narrowed to a band between 670nm and 720nm to pinpoint peak wavelength, which is 700.015nm.


Spectrographic plot
Spectrographic analysis of sample #1 of a YULI # YLIR-700 700nm deep red LED (with If=19.280mA to check for wavelength shift); spectrometer's response narrowed to a band between 670nm and 720nm to pinpoint peak wavelength, which is 701.445nm.


Power output analysis
Power output analysis of sample #1 of a YULI # YLIR-700 700nm deep red LED (at If=48.370mA).
Looks like it tops out at 26mW, which is somewhat overspec.


Power output analysis
Power output analysis of sample #1 of a YULI # YLIR-700 700nm deep red LED (at If=19.280mA).
Tops out at 10mW at If=19.280mA.


Spectrographic plot
Spectrographic analysis of sample #2 of a YULI # YLIR-700 700nm deep red LED.


Spectrographic plot
Spectrographic analysis of sample #2 of a YULI # YLIR-700 700nm deep red LED; spectrometer's response narrowed to a band between 670nm and 720nm to pinpoint peak wavelength, which is 697.230nm.


Power output analysis
Power output analysis of sample #2 of a YULI # YLIR-700 700nm deep red LED.
Looks like it tops out at 10mW, which (although near the low end) is within spec for this LED.













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