2 color Keith Haring

Present your work.
holomaker
Posts: 763
Joined: Wed Jan 07, 2015 8:01 am

Re: 2 color Keith Haring

Post by holomaker » Sat Feb 08, 2020 9:48 am

Ok Nana check your pM box

stefanosica
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Joined: Mon Apr 03, 2017 10:09 am

Re: 2 color Keith Haring

Post by stefanosica » Sat Feb 08, 2020 12:42 pm

Very interesting device to start the color holography. Since the color emulsions have similar sensitivities in green and red, is it possible to adjust the power emitted by the green laser to make it close to that of the red laser? Thank you.

holomaker
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Joined: Wed Jan 07, 2015 8:01 am

Re: 2 color Keith Haring

Post by holomaker » Sat Feb 08, 2020 8:08 pm

stefanosica wrote:
Sat Feb 08, 2020 12:42 pm
Very interesting device to start the color holography. Since the color emulsions have similar sensitivities in green and red, is it possible to adjust the power emitted by the green laser to make it close to that of the red laser? Thank you.
Yes any adjustment is possible, I thought I had the color balanced as seen in the photo oh the Haring pins , do you think it’s to green?
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stefanosica
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Joined: Mon Apr 03, 2017 10:09 am

Re: 2 color Keith Haring

Post by stefanosica » Mon Feb 10, 2020 3:07 am

I think it is important to be able to balance the two colors by doing exposure tests in red and green. I have read that very often different batches of the same emulsion have different sensitivity curves. In any case, you can always play on the exposure times of the individual lasers. The important thing is that the two lasers are collinear and that the circles of the expanded rays have the same diameter and have the polarization planes parallel to them. Big work ! Congratulations ! As soon as the device will be available on ebay I could definitely consider buying it.

holomaker
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Joined: Wed Jan 07, 2015 8:01 am

Re: 2 color Keith Haring

Post by holomaker » Mon Feb 10, 2020 8:43 am

Yes covered all that ... To make it-less complicated the green and red are balanced.. it is possible to adjust , have a couple made and ready to go.. if you want one lmk. Send me a PM. Here’s an expanded beam using a achromate lens only.there are two access holes that allow you to adjust color output ..

If the diameters of the beams are off that’s ok as there’s plenty of green light to throw away if needed...

The idea was to make full color holography easier as all that is needed to add a sapphire to it ..
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holomaker
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Joined: Wed Jan 07, 2015 8:01 am

Re: 2 color Keith Haring

Post by holomaker » Tue Feb 11, 2020 10:59 am

Lol Nana , now I can’t see the messages you sent me here on the forum, says my inbox was full? Now empty and still nothing !

Mr Astro
Posts: 12
Joined: Thu Aug 27, 2020 3:47 pm

Re: 2 color Keith Haring

Post by Mr Astro » Fri Sep 11, 2020 8:30 pm

thanks for the laser :D
here is my test
little old lady.jpg
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holomaker
Posts: 763
Joined: Wed Jan 07, 2015 8:01 am

Re: 2 color Keith Haring

Post by holomaker » Mon Apr 12, 2021 6:19 am

Mr Astro wrote:
Fri Sep 11, 2020 8:30 pm
thanks for the laser :D
here is my test
little old lady.jpg
Can you provide a couple more pictures/information ? Nice work

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