Anybody interested in one of these reflectors?

CarlofET · 8th January 2005, 06:52 AM

While I was shopping for a mixing bowl reflector, I happened to come across something else that could be used as a reflector today, and I was wondering if anybody would be interested in one. I'm using one myself, but I can get more. Check out the pictures and e-mail me at carl_of_et@yahoo.com.

CarlofET · 8th January 2005, 06:57 AM

Another

CarlofET · 8th January 2005, 06:59 AM

Excuse the greenish tint - it's my not-so-great digital camera.

CarlofET · 8th January 2005, 07:03 AM

Here's the higher resolution images:

https://mywebspace.wisc.edu/markesta...s/01010010.JPG
https://mywebspace.wisc.edu/markesta...s/01010009.JPG
https://mywebspace.wisc.edu/markesta...s/01010013.JPG

corryn00 · 8th January 2005, 07:24 AM

HOLY C R A P I'M BLIND!

hahha

looks good, is that a mixing bowl?

Gordon

CarlofET · 8th January 2005, 03:35 PM

Nope. I was planning on buying a mixing bowl, but I wasn't happy with the shapes I was finding. I found this dealy and I figured the shape was much better. It's *almost* an actual sphere.

TaskMaster · 8th January 2005, 07:20 PM

How well did that focus the light for you? Do you have any pics of a spot on a screen or the wall?

Guy Grotke · 11th January 2005, 12:06 PM

This is a source for stainless steel hemispheres, in the form of quiche molds:

http://www.dr.ca/e_pcercle.html

Look down the page for "Stainless steel half sphere moulds". They have 11 different sizes, so you can pick one to fit your needs. I used the 12 cm version. After I cut the top inch off with a Dremel cutting wheel (actually about 12 of them), it made a perfect spherical reflector. I tested mine with a very tiny flashlight bulb running at 2/3 voltage. If I put the filament at the center of curvature, then I could see it reflect right back through the bulb from every angle. With the top inch cut off, it fits my lamp optics and still gives me lots of airflow around the bulb.

They come with a mirror polished finish. If you want to make them even better, you can get them silver plated at a local plating shop. Just be sure to tell the platers you want a bright mirror finish, so they don't do it with a matte finish.

Only problem: Though the prices are great, the shipping to the US cost me about $12 US, which more than doubled the price. Should be MUCH less if you are in Canada. Elsewhere, you might want to find some nearby buying-buddies to split the shipping cost. They told me they could have shipped several for that minimum shipping charge.

TaskMaster · 11th January 2005, 02:58 PM

Guy - do you think youd be able to notch two sides of those and use them for the Ushio 400W MH retrofit bulb you pointed out?

TaskMaster · 11th January 2005, 03:01 PM

What is the 12cm measuring? If that is radius or diameter those are damn small bowls!

8th January 2005, 07:24 AM	#5
corryn00 diyAudio Member Join Date: May 2004 Location: canada	HOLY C R A P I'M BLIND! hahha looks good, is that a mixing bowl? Gordon __________________ BUY FIRST...ASK QUESTIONS LATER!

11th January 2005, 12:06 PM	#8
Guy Grotke diyAudio Member Join Date: Sep 2004 Location: Vista, CA	stainless steel hemispheres This is a source for stainless steel hemispheres, in the form of quiche molds: http://www.dr.ca/e_pcercle.html Look down the page for "Stainless steel half sphere moulds". They have 11 different sizes, so you can pick one to fit your needs. I used the 12 cm version. After I cut the top inch off with a Dremel cutting wheel (actually about 12 of them), it made a perfect spherical reflector. I tested mine with a very tiny flashlight bulb running at 2/3 voltage. If I put the filament at the center of curvature, then I could see it reflect right back through the bulb from every angle. With the top inch cut off, it fits my lamp optics and still gives me lots of airflow around the bulb. They come with a mirror polished finish. If you want to make them even better, you can get them silver plated at a local plating shop. Just be sure to tell the platers you want a bright mirror finish, so they don't do it with a matte finish. Only problem: Though the prices are great, the shipping to the US cost me about $12 US, which more than doubled the price. Should be MUCH less if you are in Canada. Elsewhere, you might want to find some nearby buying-buddies to split the shipping cost. They told me they could have shipped several for that minimum shipping charge.

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8th January 2005, 07:03 AM	#4
CarlofET diyAudio Member Join Date: Dec 2004 Location: Wisconsin	Here's the higher resolution images: https://mywebspace.wisc.edu/markesta...s/01010010.JPG https://mywebspace.wisc.edu/markesta...s/01010009.JPG https://mywebspace.wisc.edu/markesta...s/01010013.JPG

8th January 2005, 03:35 PM	#6
CarlofET diyAudio Member Join Date: Dec 2004 Location: Wisconsin	Nope. I was planning on buying a mixing bowl, but I wasn't happy with the shapes I was finding. I found this dealy and I figured the shape was much better. It's almost an actual sphere.

8th January 2005, 07:20 PM	#7
TaskMaster diyAudio Member Join Date: Jan 2005 Location: USA	How well did that focus the light for you? Do you have any pics of a spot on a screen or the wall?

11th January 2005, 02:58 PM	#9
TaskMaster diyAudio Member Join Date: Jan 2005 Location: USA	Guy - do you think youd be able to notch two sides of those and use them for the Ushio 400W MH retrofit bulb you pointed out?

11th January 2005, 03:01 PM	#10
TaskMaster diyAudio Member Join Date: Jan 2005 Location: USA	What is the 12cm measuring? If that is radius or diameter those are damn small bowls!

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