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Rose Bengal as a sensitizer?

Nodda Duma

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Jan 22, 2013
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Location
Batesville, Arkansas
Format
Multi Format
I see little discussion about Rose Bengal as a sensitizer here. However, there is some discussion of it in photographic journals from the turn-of-the-century. It seems to provide for more orthochromatic sensitivity than does erythrosin. Is Rose Bengal a viable sensitizer? Why or why not?
 
Okay. I understand it now. It sensitizes to orange. Thanks!
 
Yes, I think so. And reading up on how to perform the measurements. Time to put my 50 free OSA articles / year to use!
 
Last edited:
We used Bausch and Lomb monocrhomaters and made quite good units. A stable uniform light source and you are all set.... Oh, you need an optical bench.

PE
 
Photo Engineer said:
We used Bausch and Lomb monocrhomaters and made quite good units. A stable uniform light source and you are all set.... Oh, you need an optical bench.

PE
Click to expand...

My optical bench at the house is tied up with my interferometer and an MTF test station. Not sure why you'd need one in any case, unless there's some vibration-sensitive aspect of the alignment for the measurement?
 
If it is not constantly kept in alignment, the spectrum can shift slightly due to the offset.

I don't know how rigid it should be, but the ones I used were on a 2x3 ft plate of 1/2 inch steel.

PE
 
Gotcha. I kind of reasoned it out after asking the question. On the monochromators I've used in the past, the source was rigidly bolted to the monochromator assembly to maintain alignment. Hence my confusion. I don't recall the brand but it wasn't B&L. Maybe Lambda
 
I have a small hand held unit for viewing light sources that a friend gave me. It is quite handy and shows differences in light sources.

PE
 
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