ScottRohrbach
@scottrohrbach.bsky.social
Dad, husband, space telescope play-tester, Blue in @ChromaticsMD, DM, occasional Jedi, kilt-Friday proponent, he/him
I’d be ok with that.
December 26, 2025 at 12:48 PM
I’d be ok with that.
Ummm… yeah mostly same.
December 26, 2025 at 4:08 AM
Ummm… yeah mostly same.
Which movie(s)?
December 26, 2025 at 4:06 AM
Which movie(s)?
Digital readouts and a well thought out backlash avoidance method. (And a lot of time spent aligning the diamond blade to generate minimum kerf and wobble.)
October 11, 2025 at 10:05 PM
Digital readouts and a well thought out backlash avoidance method. (And a lot of time spent aligning the diamond blade to generate minimum kerf and wobble.)
I had a technically difficult but mindless job in the early 90’s. Slicing carbon fiber composites into fatigue test samples. Typically 1” wide with a tolerance of 5 mils (though I kept 2 mils about 95% of the time). Made thousands of those, but it gave me a LOT of time to think about other things.
October 11, 2025 at 10:01 PM
I had a technically difficult but mindless job in the early 90’s. Slicing carbon fiber composites into fatigue test samples. Typically 1” wide with a tolerance of 5 mils (though I kept 2 mils about 95% of the time). Made thousands of those, but it gave me a LOT of time to think about other things.
Aww, that’s too bad. My workplace has armed guards who will scowl at you QUITE firmly if you try to get in.
October 11, 2025 at 7:45 PM
Aww, that’s too bad. My workplace has armed guards who will scowl at you QUITE firmly if you try to get in.
I’m waiting to find out what happened when he tried.
October 11, 2025 at 7:39 PM
I’m waiting to find out what happened when he tried.
I was actually looking for a Webb image that might have the Northern Light color scheme, but this was one of the first things I saw, so ran with it.
September 4, 2025 at 10:54 PM
I was actually looking for a Webb image that might have the Northern Light color scheme, but this was one of the first things I saw, so ran with it.
The range that this happens for is very narrow, so it can usually be avoided by not putting bright objects right in the ~3 arcsecond space at the edge. But a moon of Uranus is pretty big and telescopes tend to take many observations slightly shifted with respect to one another to build up an image.
September 4, 2025 at 9:01 PM
The range that this happens for is very narrow, so it can usually be avoided by not putting bright objects right in the ~3 arcsecond space at the edge. But a moon of Uranus is pretty big and telescopes tend to take many observations slightly shifted with respect to one another to build up an image.
It is something that is essentially inevitable. We need the shield to keep light from hitting the shiny wire bonds that connect the detector to the rest of the electronics. (Without the shield we would have worse problems.) 1/2
September 4, 2025 at 9:01 PM
It is something that is essentially inevitable. We need the shield to keep light from hitting the shiny wire bonds that connect the detector to the rest of the electronics. (Without the shield we would have worse problems.) 1/2
will strike the inside of a very shallow shield just over the detector. That light will scatter into the field with a plume that was termed “dragon’s breath”. The scattering also seems to enhance the diffraction spikes in directions perpendicular to the edge.
September 4, 2025 at 8:37 PM
will strike the inside of a very shallow shield just over the detector. That light will scatter into the field with a plume that was termed “dragon’s breath”. The scattering also seems to enhance the diffraction spikes in directions perpendicular to the edge.
Here’s a cute anecdote: the funky shape and diffraction spikes around Miranda in this image is something I studied on and off for a year or so. Light from a bright object just outside of the field of view in NIRCam (1/2) stsci-opo.org/STScI-01K228...
September 4, 2025 at 8:37 PM
Here’s a cute anecdote: the funky shape and diffraction spikes around Miranda in this image is something I studied on and off for a year or so. Light from a bright object just outside of the field of view in NIRCam (1/2) stsci-opo.org/STScI-01K228...
will scatter off the light shield just over the detector and produce a so-called “dragon’s breath” pattern that has a plume of scattered light as well as enhancing the diffraction spikes in directions perpendicular to the edge of the field. (This can also be seen occasionally in Hubble images.) 2/2
stsci-opo.org
September 4, 2025 at 8:31 PM
will scatter off the light shield just over the detector and produce a so-called “dragon’s breath” pattern that has a plume of scattered light as well as enhancing the diffraction spikes in directions perpendicular to the edge of the field. (This can also be seen occasionally in Hubble images.) 2/2
My goal was that it will help me slow down and document my work more carefully, but that right there makes it worth the price. 💙
September 4, 2025 at 8:18 PM
My goal was that it will help me slow down and document my work more carefully, but that right there makes it worth the price. 💙
I had been holding out for another Chais Magic run, but this one is for work notes, so Northern Lights seemed more appropriate.
September 4, 2025 at 8:14 PM
I had been holding out for another Chais Magic run, but this one is for work notes, so Northern Lights seemed more appropriate.
You make it sound like that’s a bad thing. 😉
(Of course, the first version of this post read “bed” thing… 🙄)
(Of course, the first version of this post read “bed” thing… 🙄)
September 4, 2025 at 7:49 PM
You make it sound like that’s a bad thing. 😉
(Of course, the first version of this post read “bed” thing… 🙄)
(Of course, the first version of this post read “bed” thing… 🙄)