From: Sandy King (sanking@CLEMSON.EDU)
Date: 11/12/01-12:51:39 PM Z
Ed,
Maybe we are reading from different pages of the book, but as I look
at the charts for the L1261 and L1252 at
http://www.olec.com/graphicarts/OLEC_SpectramatchTM_Lamps/olec_spectramatchtm_lamps.html
the scales appear to be the same. But the relative intensity of the
light for the L1261 between 360 to 385nm (which peaks at about 85%
at 380nm) is greater than the L1252 (which peaks at about 60% at
380nm). I can see from the information that the light sources for
both units consist of a mixture of a mixture of AL 23-53, but this
mixture appears to have been weighted to give greater output for the
L1261 at the wave lengths noted above, without the big spikes between
400-420nm.
What am I missing about the scales?
Sandy
>Sandy:
> The 1252 bulb is a simple mixture of halide additives from the 1251 and
>1262 bulbs. The 1262 spectrum looks exaggerated, because it is vertically
> exaggerated. If you plot the three spectrum using the same vertical
>scale, , the 1262 spectrum will look like the 1252 spectrum without the two
>humps at 400 and 420 nm (caused by the 1251 additives).
>
> By the way, the spectrum of the theimer violux bulb is nearly identical
>to the 1252 bulb. So much for trade secrets.... Ed.
>
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