Search found 603 matches

by dannybee
Wed Sep 30, 2020 10:24 am
Forum: General Holography
Topic: GEOLA News_photopolymer Bayfol HX200 already available in small quantities
Replies: 11
Views: 410

Re: GEOLA News_photopolymer Bayfol HX200 already available in small quantities

This may be of some interest, I did try to use clear optical adhesive it come in a roll to mount on glass , on a red 640nm reflection hologram and it took about 15 min it shifted to bright green, I'm wondering if you mount it to glass with adhesive first then let sit for 20min then expose, might be ...
by dannybee
Mon Aug 17, 2020 1:19 pm
Forum: General Holography
Topic: new laser diodes for holography
Replies: 2
Views: 519

Re: new laser diodes for holography

the diode they use is SHD4850MG
by dannybee
Mon Aug 17, 2020 12:44 pm
Forum: General Holography
Topic: new laser diodes for holography
Replies: 2
Views: 519

new laser diodes for holography

been testing David red diode and found that if i mount it on a te cooler to keep it cold, I can get 40+mw out of it and still get good contrast in fringes, and now my question i was comparing the paper work on this diode to the new 488nm diodes that say they are single mode, just like the red at a h...
by dannybee
Mon Jul 27, 2020 3:47 pm
Forum: General Holography
Topic: conference on zoom
Replies: 18
Views: 899

Re: conference on zoom

i think the best would be Google's Meet there is no time limit, and lots of tools for the presenter :D :D so probably call "Holographyforum-meet2020", have to check tho on celebrate recovery we use zoom and only the one presenting the meeting need the pro zoom our meeting go for about 1 hour so have...
by dannybee
Sun Jul 26, 2020 11:08 am
Forum: General Holography
Topic: Geola question
Replies: 12
Views: 734

Re: Geola question

Thanks Dinesh you could also do this by measuring the intensity of the light going through and comparing it to the light coming in right? My hene is 18mw and my 640 diode is 25mw spread to about 5x7 at the plate film is a 4x4 .. this setup works fine with the hene & and the 532nm. ... a nice even sp...
by dannybee
Sun Jul 26, 2020 11:06 am
Forum: General Holography
Topic: Geola question
Replies: 12
Views: 734

Re: Geola question

Thanks Dinesh you could also do this by measuring the intensity of the light going through and comparing it to the light coming in right? My hene is 18mw and my 640 diode is 25mw spread to about 5x7 at the plate film is a 4x4 .. this setup works fine with the hene & and the 532nm. ... a nice even sp...
by dannybee
Sun Jul 26, 2020 10:56 am
Forum: General Holography
Topic: Geola question
Replies: 12
Views: 734

Re: Geola question

Thanks Dinesh you could also do this by measuring the intensity of the light going through and comparing it to the light coming in right?
by dannybee
Sat Jul 25, 2020 11:40 am
Forum: General Holography
Topic: Geola question
Replies: 12
Views: 734

Re: Geola question

according to the transmission of the polymer in 640nm is much less transmission than a hene, so that the problem with that 640nm it needs more light to go through the dye for a reflection, it would be ok for a transmission but a bit low for a reflection. if this is the same stuff as liti they probab...
by dannybee
Sat Jul 25, 2020 10:49 am
Forum: General Holography
Topic: conference on zoom
Replies: 18
Views: 899

Re: conference on zoom

Well we could use Google meeting, we use this one for our church, it has a record and other features that can help the presenter ,pictures ,PowerPoint