Search found 77 matches

by thycore
Sun Dec 22, 2019 4:46 am
Forum: Beginning Holography
Topic: Buzzing HeNe laser
Replies: 7
Views: 5392

Re: Buzzing HeNe laser

That’s a brilliant idea xD although i’ll have to find a bag which can trap helium tight enough :-) will try this
by thycore
Sat Dec 21, 2019 10:10 am
Forum: Beginning Holography
Topic: Buzzing HeNe laser
Replies: 7
Views: 5392

Re: Buzzing HeNe laser

Just to close this subject, the problem was the laser required a bit more than its regular 11mA current to keep stable. Lasos GmbH was very kind to provide me with their engineers support to confirm 142laser's diagnosis ;-) unfortunately the standard power supply for this laser cannot have a variab...
by thycore
Tue Mar 12, 2019 1:52 am
Forum: Beginning Holography
Topic: Drying silver halides emulsion with alcool ?
Replies: 7
Views: 5247

Re: Drying silver halides emulsion with alcool ?

Thank you folk so much for your links and explanations :-) I reduced concentration of the flo in my a rincing bath in which (and in all baths) I now agitate my plate emulsion facing down to prevent splinters or particles deposit and had vertical drying ( without hair blower ) and my problem seems so...
by thycore
Fri Mar 08, 2019 2:50 pm
Forum: Events, announcements, and news
Topic: Holography Consultation/Installation Job Offer
Replies: 1
Views: 9113

Re: Holography Consultation/Installation Job Offer

I assume since december you were told or discovered that the technology you’re referring to is not holography :-) ?

You are looking for a video projector on a transparent screen / sheet of plastic. Reflectogram somehow :-)
by thycore
Fri Mar 08, 2019 2:36 pm
Forum: Beginning Holography
Topic: Drying silver halides emulsion with alcool ?
Replies: 7
Views: 5247

Drying silver halides emulsion with alcool ?

Hello everyone !

I’m having difficulties in achieving a uniform drying of my silver halides emulsions ( using kodak flo) i somehow still get some stains/color-shifted zones.

I was considering drying in alcool baths, like for DCG... Anyone tried already ?
by thycore
Mon Dec 17, 2018 3:09 am
Forum: Beginning Holography
Topic: Buzzing HeNe laser
Replies: 7
Views: 5392

Re: Buzzing HeNe laser

Just to close this subject, the problem was the laser required a bit more than its regular 11mA current to keep stable. Lasos GmbH was very kind to provide me with their engineers support to confirm 142laser's diagnosis ;-) unfortunately the standard power supply for this laser cannot have a variabl...
by thycore
Tue Nov 13, 2018 5:17 pm
Forum: Optics
Topic: So... diode or hene lasers for holography ?
Replies: 2
Views: 6018

So... diode or hene lasers for holography ?

As any young holographer I struggle to get my hands on a decent set of laser tubes/heads/power supplies.. It all cost a lot, is heavy and takes a lot of space. How is the diode stuff going on ? Any chance that diode lasers would finally match performances of hene in terms of stability, cohérence len...
by thycore
Tue Nov 13, 2018 9:56 am
Forum: Beginning Holography
Topic: Buzzing HeNe laser
Replies: 7
Views: 5392

Buzzing HeNe laser

I started up a laser with a fresh new power supply (genuine from manufacturer), and when starting up the laser would emit some light, but buzzing at the same time, like a neon tube which would not fully switch on, it sounds like it "trying". Is it safe to let the tube "warm up" in this condition and...
by thycore
Wed Oct 17, 2018 11:59 am
Forum: Beginning Holography
Topic: Drying marks
Replies: 1
Views: 3872

Drying marks

Hello ! I have like an increasing problem of drying marks on my recent holograms, it seems correlated to the amount of flo I'm using in the flo bath, but if I don't add any flo I have marks aswell. Could it be related to "maybe" old chemistry ? I see my developer bath has grown some little filaments...
by thycore
Sun Oct 14, 2018 10:40 am
Forum: General Holography
Topic: Laser pico projector for making color holograms
Replies: 48
Views: 21506

Re: Laser pico projector for making color holograms

Do you have to maintain 0-vibration during the whole process or does it tolerate a bit of a movement ?