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Posted by JL Grasso on February 8, 2008, 3:18 pm
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Hello,
Sorry if this is off-topic somewhat, but I couldn't find a specific
group.
I have no optical sciences experience, but am hoping someone can point
me in the right direction. I want to mount a 1/32nd DIN temperature
indicator (face about 1.5" wide X .75" high) below a machine to
protect it from damage from moisture. I'd like the machine operator to
be able to view the indicator, so the image would need to be bent
basically 90 degrees without inverting or reversing it. I would also
need the viewing angle to actually be 70 to 90 degrees (so that the
eyes/head would not be restrained to one position or location).
From my research online, it looks like a littrow prism would do this,
but would need to have a coated surface on the "bottom" plane.
This doesn't need to be high-quality, or extremely durable, so it
could be made from acrylic.
Is this the most efficient way to do this and still just have one
component accomplishing the task? Any experience with how much
something like this would/should cost?
Thanks for any suggestions
Jerry
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Posted by Phil Hobbs on February 8, 2008, 4:29 pm
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JL Grasso wrote:
> Hello,
>
> Sorry if this is off-topic somewhat, but I couldn't find a specific
> group.
>
> I have no optical sciences experience, but am hoping someone can point
> me in the right direction. I want to mount a 1/32nd DIN temperature
> indicator (face about 1.5" wide X .75" high) below a machine to
> protect it from damage from moisture. I'd like the machine operator to
> be able to view the indicator, so the image would need to be bent
> basically 90 degrees without inverting or reversing it. I would also
> need the viewing angle to actually be 70 to 90 degrees (so that the
> eyes/head would not be restrained to one position or location).
>
> From my research online, it looks like a littrow prism would do this,
> but would need to have a coated surface on the "bottom" plane.
>
> This doesn't need to be high-quality, or extremely durable, so it
> could be made from acrylic.
>
> Is this the most efficient way to do this and still just have one
> component accomplishing the task? Any experience with how much
> something like this would/should cost?
>
> Thanks for any suggestions
>
> Jerry
Two mirrors would do it. (I think by 'Littrow prism' you actually mean
a pentaprism, as used in SLR cameras--that's just a particular
arrangement of two mirrors, formed on the faces of a prism.)
Cheers,
Phil Hobbs
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>
> Sorry if this is off-topic somewhat, but I couldn't find a specific
> group.
>
> I have no optical sciences experience, but am hoping someone can point
> me in the right direction. I want to mount a 1/32nd DIN temperature
> indicator (face about 1.5" wide X .75" high) below a machine to
> protect it from damage from moisture. I'd like the machine operator to
> be able to view the indicator, so the image would need to be bent
> basically 90 degrees without inverting or reversing it. I would also
> need the viewing angle to actually be 70 to 90 degrees (so that the
> eyes/head would not be restrained to one position or location).
>
> From my research online, it looks like a littrow prism would do this,
> but would need to have a coated surface on the "bottom" plane.
>
> This doesn't need to be high-quality, or extremely durable, so it
> could be made from acrylic.
>
> Is this the most efficient way to do this and still just have one
> component accomplishing the task? Any experience with how much
> something like this would/should cost?
>
> Thanks for any suggestions
>
> Jerry