WTB - Wavien collars

Enderman · 2018-04-30T04:17:00.000Z

Looking to buy any size Wavien collar(s) or similar spherical reflector with hole.

Post or message me the size and condition of the reflector(s) and how much your asking price is

PS- No matter how old this post gets, unless I specifically say I’m done buying, please let me know what you’ve got available!

Nicolaas · 2018-04-30T18:27:54.000Z

Good luck!

I mean it!!

Cheers,
Nico

MRsDNF · 2018-04-30T20:31:13.000Z

I hope you find what your after as I love what you build.

Enderman · 2018-04-30T20:34:51.000Z

Thanks guys

Agro · 2018-04-30T20:44:26.000Z

Maybe some stock spherical reflector (like from Optiforms) would work from you?

PolarLi · 2018-04-30T20:45:42.000Z

I don’t have a “wavien” for you, but if you find a spherical glass mirror with the right focal length, it’s easy to drill out the center with a $10 diamond hole saw, preferably in a lathe.

DavidEF · 2018-04-30T20:57:24.000Z

PolarLi:

I don’t have a “wavien” for you, but if you find a spherical glass mirror with the right focal length, it’s easy to drill out the center with a $10 diamond hole saw, preferably in a lathe.

focal length?

If it’s truly spherical, then the ‘focal length’ is the distance from the reflecting surface to the radial center of the sphere.

Enderman · 2018-04-30T21:17:48.000Z

Agro:

Maybe some stock spherical reflector (like from Optiforms) would work from you?

The only stock ones from optiforms have a very large opening, so they only collect a few degrees of light
Getting a custom one will cost like $5k.

PolarLi:

I don’t have a “wavien” for you, but if you find a spherical glass mirror with the right focal length, it’s easy to drill out the center with a $10 diamond hole saw, preferably in a lathe.

Thanks for the tip!

PolarLi · 2018-04-30T21:54:49.000Z

DavidEF:

focal length?

If it’s truly spherical, then the ‘focal length’ is the distance from the reflecting surface to the radial center of the sphere.

Correct. But it doesn’t need to be exactly half a sphere to be called a spherical mirror. You can get a mirror based on a bigger sphere that is cut down in diameter, so the focal point is in front of the actual mirror edge. The focal point hasn’t moved, but parts of the mirror is gone. But if you want to be very specific, I guess the correct terminology for this is effective focal length, as it is listed here: https://www.edmundoptics.com/optics/optical-mirrors/focusing-concave-mirrors/concave-spherical-mirrors/

DavidEF · 2018-04-30T22:07:19.000Z

PolarLi:

DavidEF:

focal length?

If it’s truly spherical, then the ‘focal length’ is the distance from the reflecting surface to the radial center of the sphere.

Correct. But it doesn’t need to be exactly half a sphere to be called a spherical mirror. You can get a mirror based on a bigger sphere that is cut down in diameter, so the focal point is in front of the actual mirror edge. The focal point hasn’t moved, but parts of the mirror is gone. But if you want to be very specific, I guess the correct terminology for this is effective focal length, as it is listed here: https://www.edmundoptics.com/optics/optical-mirrors/focusing-concave-mirrors/concave-spherical-mirrors/

I knew what you meant. I was just being pedantic because I’m bored. My tired mind thought it was funny at the moment. :person_facepalming:

Enderman · 2018-04-30T22:46:39.000Z

PolarLi:

Correct. But it doesn’t need to be exactly half a sphere to be called a spherical mirror. You can get a mirror based on a bigger sphere that is cut down in diameter, so the focal point is in front of the actual mirror edge. The focal point hasn’t moved, but parts of the mirror is gone. But if you want to be very specific, I guess the correct terminology for this is effective focal length, as it is listed here: https://www.edmundoptics.com/optics/optical-mirrors/focusing-concave-mirrors/concave-spherical-mirrors/

Pretty sure that any round mirror is called a spherical mirror, the one that is exactly half is called hemispherical, which means “half of a sphere”.

Glenn7 · 2022-02-14T05:28:37.000Z

I wonder if Wavien collars work with LEP’s? I have 2 that I’d like to use on something………

djozz · 2022-02-14T13:01:36.000Z

Glenn7:

I wonder if Wavien collars work with LEP’s? I have 2 that I’d like to use on something………

In principle yes, but the light source from a LEP is many times smaller than from a led, so 1) the optical quality of the collar must be so good that the image of the light source produced by it is as small as the light source itself (or else the collar just produces an extra halo around the hotspot without much added throw) and 2) the alignment of the collar in all 3 dimensions must be an order of magnitude more precise to get the image exactly over the source.