Search results for query: *

Mike, We conjectured that a stainless steel would be a more reliable choice, but it will be up to the machinist who actually does the work. Thanks for your suggestions. hz

We are building a light detection system which works like a clock’s hand: an aluminum profile (the “hand”,shown in schematics) carrying detector assemply on its one end rotates around the other end; as the aluminum profile is quite long (2200L*40W*40H mm) and heavy (~10kg)， we will add a...

Hi Folks... I am looking for a motorized rotatable polarizer stage/mount. I need my polarizers (and waveplates) to be able to rotate every 45 degrees, driven by motors of course. However, the module's outer diameter should not exceed 1 inch or so and the clear aperture should be at least half...

Harold: Thanks for your comments; as Hobbs says (Building Electro-Optical Systems) "Designing and building electro-optical instruments is without a doubt one of the most interdisciplinary activities in engineering" and thus collegiality is indispensable. Unfortunately now I am alone in this...

My "telescope" is actually a radiometer, or simply put, a focal lens to focus the collected light to the detector. Let me first improve my design by increasing the laser power and the detector aperture trying to bring up the signal level...then I'll bug the forum again :)

yes Ellipsometer! That's almost exactly what I want to build but with longer arms and finer angular viewing steps. I guess if I could google out some good ellipsometer designs that would make my life simpler... Harold: IRstuff already answered the fixed position question, here are something...

Thanks everyone... IRStuff: Now I see....; in remote sensing often times people only need to measure scattering at a couple incident angles, say 0 deg (normal), 30 deg and 60 deg, in contrast to the denser viewing angles desired; so to reduce cost and complexity I would fix my collimator arm by...

I know one could write a thesis on this topic all the time....but quick answers would really help before I delve into the elaborate books like Building Electro-Optic Systems (which I'm reading slowly...) Silicone photodiodes are easier to use and I have had very good experience with Hamamatsu...

If your spheres are transparent (no absorption) and if you can find a goniometer to measure the "phase function" of such spheres, you can determine the refractive index from the rainbow angle, see, e.g.: " Mathematics of the Rainbow" Mathematics Teacher, v81 n6 p484-88 Sep 1988

Thank you guys for all your kind replies, suggestions and everything! What a wonderful engineering forum I just stumbled upon!!! zekeman: IRStuff's answer is correct; the telescope makes an angle Theta with the vertical Z-axis and Theta varies from [-80, 80] degs. To better illustrate my setup...

Hi... Do you guys happen to know any good rotary stages that would work in the vertical plane? I searched Physics Instrument, Zaber and New Port etc. but mostly they only specify a maximum load weight so I assume they would only work well in the horizontal plane. I am designing an automated...