UV lines of mercury spectra

[Physikfan]

The spectra are photos of Hg spectra with increasing exposure time from top to bottom, light source is a Hg high-pressure lamp, the entrance slit is imaged with a quartz lens via a reflection grating on a screen, to detect the UV lines, the right part of an ultraviolet screen:








Only in the first two spectra do the colors correspond to the visual impression with unarmed eyes.
The blue line on the far left in the last spectrum is a ghost.

Further experiments with quartz glass prism and zinc sulphide screen are in preparation.

[T3sl4co1l]

This isn't accurate, right? -- Because UV+vis covers more than an octave bandwidth, so the green lines are second order vis lines, no?

Tim

[LaserSteve]

He's projecting on a Green  Phosphor.. That looks exactly correct..

see:

https://physics.nist.gov/PhysRefData/Handbook/Tables/mercurytable2.htm

Steve

[cdev]

see image.

The filter is a dichroic filter originally meant for scientific instruments. I've had it for ages. Thats my monitor here, right now.

The color output of an LCD with a florescent backlight.

You can clearly see the lines with all sorts of light sources.

[John Heath]

It should look like this with a cool thumb print of the two very close lines at 3650 3653. I would venture a guess that the two greens in the third brightest photo is the tell tail thumb print 3650 and 3653.