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spectrum of HID lamp

W

William

Jan 1, 1970
0
Dear All:

I need your instruction to find out the typical spectrum of HID lamp
(automobile headlight). Please kindly instruct.

Thanks,

William
 
V

Victor Roberts

Jan 1, 1970
0
Dear All:

I need your instruction to find out the typical spectrum of HID lamp
(automobile headlight). Please kindly instruct.

A member of this group has posted spectral curves of many
lamps on his web site. See:

http://ioannis.virtualcomposer2000.com/spectroscope/index.html

--
Vic Roberts
http://www.RobertsResearchInc.com
To reply via e-mail:
replace xxx with vdr in the Reply to: address
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This information is provided for educational purposes only.
It may not be used in any publication or posted on any Web
site without written permission.
 
D

Douglas G. Cummins

Jan 1, 1970
0
The spectrum may vary between bulb manufacturer and type (D1S, D2S, D3S,
D4S, D1R, D2R, D3R, D4R), and whether you're looking at just the bulb
light or at the light coming from a headlamp (through potentially
colored lenses and off potentially colored reflectors).

That said, if you want to know the spectrum then you should either
measure it or contact a manufacturer or possibly a supplier and ask for it.
 
D

Daniel J. Stern

Jan 1, 1970
0
are there any refs which actually state this is a Hg-free spectrum?

D3x and D4x are by definition Hg-free. Of course, I am trusting the site I
found to report the DUT accurately, which they may not have done.
 
V

Victor Roberts

Jan 1, 1970
0
Daniel,

are there any refs which actually state this is a Hg-free spectrum?

Forgive my quriosity, but some of the lines there appear to be coming from
Hg.

Since there are so many lines from scandium and the other
metals used to augment the sodium spectrum in metal halide
lamps, some of these lines could be easily mistaken for Hg.
Or -perhaps these lamps are not completely Hg-free. The
mercury may be reduced enough that the lamps are no longer
classified as hazardous waste, but that does not mean zero
mercury.

--
Vic Roberts
http://www.RobertsResearchInc.com
To reply via e-mail:
replace xxx with vdr in the Reply to: address
or use e-mail address listed at the Web site.

This information is provided for educational purposes only.
It may not be used in any publication or posted on any Web
site without written permission.
 
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