Search found 101 matches

by Sergio
Sat Mar 12, 2016 4:05 pm
Forum: Optics
Topic: microscope objective
Replies: 1
Views: 12233

Re: microscope objective

I use a Newport 900 SF (almost sure!) with M-series optical objetives. It uses a standard RMS thread, 0.800-36. It came with M-10x objective (sure..)

Probably, (Taiwan!) it is metric, see the precision numeration screw.
by Sergio
Mon Mar 07, 2016 8:38 am
Forum: Events, announcements, and news
Topic: New Edition: Practical Holography
Replies: 5
Views: 26270

Re: New Edition: Practical Holography

What type is the cover hologram, photopolymer, silver halide, digital by Geola?..
by Sergio
Mon Jul 13, 2015 4:38 pm
Forum: General Holography
Topic: ISDH 2015 slides
Replies: 1
Views: 1736

Re: ISDH 2015 slides

Very nice Petr, thank you.

I hope you enjoyed your Russian travel also.

Sergio.
by Sergio
Fri Jun 12, 2015 12:23 pm
Forum: Beginning Holography
Topic: Can I make a green hologram with a red laser?
Replies: 8
Views: 5365

Re: Can I make a green hologram with a red laser?

This is interesting, Sergio. I have no idea how photopolymers work, so my question is likely silly: any photopolymer is covered by a protective layer? How can I remove it? Does any photopolymer contain some amount of "solvent" that can evaporate? By the way, could you recommend me a resou...
by Sergio
Wed Jun 10, 2015 4:49 pm
Forum: Beginning Holography
Topic: Can I make a green hologram with a red laser?
Replies: 8
Views: 5365

Re: Can I make a green hologram with a red laser?

Hi, Tyler20002015, as Dinesh pointed out, it is quite easy to produce "false color hologram" with silver halide holographic plates (i.e. "wet processing"). If you really want to try it, order some from e.g. Integraph, Harman or Ultimate (or even from unixboy at this forum who se...
by Sergio
Thu May 21, 2015 10:45 am
Forum: Gallery
Topic: Ultra-realistic color hologram
Replies: 4
Views: 4182

Re: Ultra-realistic color hologram

Hi Valery,

Yes, it is possible, I will see what I could do for you. Please PM me, I could not discuss business in this sector.

Colour is ready for film, 488 + 532 + 633 nm.

Will you attend ISDH 2015? We may discuss the results or technical there.

Sergio.
by Sergio
Wed May 20, 2015 9:28 pm
Forum: Gallery
Topic: Ultra-realistic color hologram
Replies: 4
Views: 4182

Ultra-realistic color hologram

Made on DAROL color red+green photopolymer plate, a synthetic "DCG" hologram.

https://youtu.be/Co2oadiv0cw

Denisyuk reflection, 532 + 633 nm, mirror grating, ~20 mJ exposure red, 20 mJ green, bleached with white light, thermally developed at 120 deg. C (hot air blow) 1 minute.
by Sergio
Wed May 20, 2015 9:09 pm
Forum: Gallery
Topic: My latest Denisyuk DCG
Replies: 9
Views: 6039

Re: My latest Denisyuk DCG

Thank you for the Araldite info Steve, it is useful for DCG and maybe also for photopolymers. Blue haze may be correlated to the Araldite high molecular weight, that for me seems improbable, or the vesicles onto DCG non exposed areas that seems to be amplified without fringes. The blue haze is reduc...
by Sergio
Fri May 08, 2015 12:45 pm
Forum: Off Topic
Topic: Tung Jeong
Replies: 7
Views: 4893

Re: Tung Jeong

Sad news. I was planning to finally see him at St. Petersburg. For us he was a legend to be inspired in holography.
by Sergio
Mon Apr 06, 2015 8:28 am
Forum: General Holography
Topic: Graham Saxby
Replies: 20
Views: 9306

Re: Graham Saxby

I remember Peter Miller was talking about the (then) new method of swelling to get colour (pseudo-colour). A lot of the audience was having trouble with the concept, but Graham pretty much got it right away. I guess that was also because the pseudo-colour method was "British" - introduced...