They might come up with $6M for thermal control inside satellites.
On 5/30/23, MSF <foster...@protonmail.com> wrote:
> We're digressing from the subject at hand, but it allows me some
> self-indulgent nostalgia.
>
> As you are no doubt aware, even black paint made to coat the interior of
> optical instruments has the problem of a quite high glancing angle
> reflectance. My nanoporous aluminum film has a very low glancing angle
> reflectance.
>
> I seriously doubt anyone would cough up 6 million bucks to produce this
> material in quantity. Maybe someone could be convinced to provide the
> capital based on the possibility of making a superior hydrovoltaic film. Not
> bloody likely.
>
> As a boy I used to make and modify all sorts of strange and unusual
> microscopes and telescopes. I was bedeviled by the reflections from the
> interior of the tubes. My solution was simple. I would deposit carbon black
> inside the tubes. A flaming q-tip soaked in motor oil and attached to a
> stick could deposit enough soot to eliminate almost all of the reflections
> from the inside of the tubes. You can even do this to the inside of
> cardboard tube if you are careful. Since I knew no one would be taking these
> gadgets apart but me, I had no worries about the surface being disturbed.
> There now. More than you wanted to know.
>
>
>
> ------- Original Message -------
> On Tuesday, May 30th, 2023 at 6:27 PM, Andrew Meulenberg
> <mules...@gmail.com> wrote:
>
>
>> I no longer have the instruments to measure the absorptance and
>> reflectance of materials; but, most optical instruments have black
>> paint on the inside walls. A new source of very black films or sheets
>> could be a useful addition because, over the years, the paint turns
>> grey.
>
>
>
