Search found 37 matches

by Steven
Mon Jul 16, 2018 9:25 pm
Forum: Events, announcements, and news
Topic: ISDH 2018
Replies: 18
Views: 20183

Re: ISDH 2018

Have any of the presentations been videoed and made available to the public?
I did see a short clip of some holograms being displayed, but that's all. :cry:

Steven.
by Steven
Wed Jun 20, 2018 10:32 pm
Forum: Events, announcements, and news
Topic: Very curious to know your position about this Kickstarter project
Replies: 2
Views: 7247

Re: Very curious to know your position about this Kickstarter project

I suspect that many amateur holographers here make display holograms for the fun and the challenge. That black box doesn't add anything to that pursuit. I can see that it may have some use in the engineering environment, prototyping, those sorts of applications. Maybe it could be used to display the...
by Steven
Fri May 04, 2018 1:03 pm
Forum: DCG
Topic: Improvement on my project
Replies: 22
Views: 15100

Re: Improvement on my project

Some points: Your reference beam is "dirty" as indicated by light and dark banding. I assume that your beam steering mirror is first surface coated and not just a normal mirror??? Otherwise the banding may be caused by inter surface reflection in your lens beam expander. You may be better off replac...
by Steven
Tue Apr 10, 2018 8:41 pm
Forum: DCG
Topic: 1st time on DCG Project
Replies: 66
Views: 32649

Re: 1st time on DCG Project

Is it better to get closer to 90degree or 56degree is the best? The easiest way to get the correct angle for minimum reflection, is to place an uncoated piece of glass, a slide in your case on your setup and adjust the angle of your laser beam to give you minimum reflection of the beam on your ceil...
by Steven
Wed Mar 07, 2018 10:51 am
Forum: DCG
Topic: 1st time on DCG Project
Replies: 66
Views: 32649

Re: 1st time on DCG Project

This one using silkscreen, 10 micron Zeta, you coatings look to be too thin or need more AmDi, but I suspect the former. You are using a 10 micron (10µm) silkscreen, I assume that is thickness when the gelatin is still in it's wet state? You must allow for the emulsion thickness to shrink due to wa...
by Steven
Fri Mar 02, 2018 2:36 pm
Forum: DCG
Topic: Novel glass-coating methods?
Replies: 9
Views: 7183

Re: Novel glass-coating methods?

"I think I'm going to buy one of their "DRAW DOWN WIRE BAR COATERS", but which thickness should I be aiming for? " From the link: "Spiral bar coaters are used to apply a film on thin materials such as sheets or plastic, so that the hiding power of the coating can be measured. This range of products ...
by Steven
Fri Mar 02, 2018 7:36 am
Forum: DCG
Topic: Novel glass-coating methods?
Replies: 9
Views: 7183

Re: Novel glass-coating methods?

Have you tried using a Meyer bar? I tried to find one for sale online some time ago, but I had trouble finding any. The fact that "mayer bars" are also known as meyer bars, meyer rods, meter bars, meter rods, metering rods, equalizer bars, doctor rods, etc. doesn't help. I'll have another look now ...
by Steven
Fri Mar 02, 2018 6:41 am
Forum: DCG
Topic: Novel glass-coating methods?
Replies: 9
Views: 7183

Re: Novel glass-coating methods?

"- Emulsion dripping down the wrong side of the glass - Bubbles in the emulsion Annoying parts of the process: - The insane amount of excess emulsion required to coat plates, as much of it spills off in to the drip tray - Having to constantly pour emulsion from drip tray back into squeeze bottle" Th...
by Steven
Thu Mar 01, 2018 4:30 pm
Forum: DCG
Topic: Novel glass-coating methods?
Replies: 9
Views: 7183

Re: Novel glass-coating methods?

What coating method do you use Pluto, and what size of plates are you making? What are your failure modes? I did briefly try veil coating without much success. Like much of DCG, I found it difficult to get consistent results. I find that mould coating (casting), gives me consistent results. However,...
by Steven
Tue Feb 20, 2018 1:06 am
Forum: DCG
Topic: 1st time on DCG Project
Replies: 66
Views: 32649

Re: 1st time on DCG Project

I think I will buy a new one from sam's laser. And how thick should my emulsion be? You are measuring the output of your power supply off load - laser not connected. I also suspect that the power supply you are using has a remote voltage sense capability. The way you have it connected at the moment...