by neufer » Mon May 25, 2009 10:19 pm
Ollie wrote:Hi Persia
I think the disturbance is a ghost image of the HST caused by taking the photo through a window of the Atlantis orbiter. Some times when a photo is taken through a window you get this effect. I guess it is some thing to do with refraction? Maybe someone, a photographer perhaps could confirm this for us
There will be a double internal reflection that will be displaced from the original
by an amount dependent on the angle and thickness of the glass (periscope like):
http://www.cmog.org/dynamic.aspx?id=5654 wrote:
<<The space shuttle has triple paned, optical-quality windows. Thirty-seven window panes in eleven different sizes and shapes are produced for each Orbiter. The fused silica outer panes of the forward windshields are designed to withstand high atmosphere reentry temperatures. The inner, tempered alumino-silicate glass pane is called the pressure pane. It is designed for maximum strength to withstand the shuttle's cabin pressure in the vacuum of space. The thick fused silica middle pane is capable of withstanding both the reentry temperature and the cabin pressure.>>
[quote="Ollie"]Hi Persia
I think the disturbance is a ghost image of the HST caused by taking the photo through a window of the Atlantis orbiter. Some times when a photo is taken through a window you get this effect. I guess it is some thing to do with refraction? Maybe someone, a photographer perhaps could confirm this for us :!:[/quote]
There will be a double internal reflection that will be displaced from the original
by an amount dependent on the angle and thickness of the glass (periscope like):
[quote=" http://www.cmog.org/dynamic.aspx?id=5654"]
<<The space shuttle has triple paned, optical-quality windows. Thirty-seven window panes in eleven different sizes and shapes are produced for each Orbiter. The fused silica outer panes of the forward windshields are designed to withstand high atmosphere reentry temperatures. The inner, tempered alumino-silicate glass pane is called the pressure pane. It is designed for maximum strength to withstand the shuttle's cabin pressure in the vacuum of space. The thick fused silica middle pane is capable of withstanding both the reentry temperature and the cabin pressure.>>[/quote]