Search found 166 matches

by jrburns47
Wed Jan 24, 2018 11:32 pm
Forum: Beginning Holography
Topic: Is brightness a function of exposure time ?
Replies: 10
Views: 11402

Re: Is brightness a function of exposure time ?

It's been literally 40 years since I used potassium permanganate so I may remember incorrectly- is it an oxidizer that can be used to make explosives? I vaguely remember that it's highly staining...
by jrburns47
Fri Dec 15, 2017 9:49 am
Forum: For Sale / Want to Buy / Trade
Topic: Looking for used Newport table
Replies: 0
Views: 2689

Looking for used Newport table

Hi,
Need a second used Newport table, at least 4'x8', with threaded holes on 1" centers, and four working pneumatic legs.
Thanks.
by jrburns47
Tue Dec 12, 2017 6:38 pm
Forum: DCG
Topic: A quick, effective method of cleaning glass slides for coating
Replies: 2
Views: 7776

Re: A quick, effective method of cleaning glass slides for coating

Very interesting video. Thanks.
Not sure though about Comet due to very fine scratching of glass. Maybe ok for DCG but not if you're trying to coat a 1-2um layer of resist I would suspect.
by jrburns47
Sat Nov 04, 2017 8:58 am
Forum: General Holography
Topic: possible to fix fuzzy integral hologram?
Replies: 3
Views: 2952

Re: possible to fix fuzzy integral hologram?

I think Bob Arkin in one of the Facebook holo groups had the correct solution for you. You need to use a clear bulb with a vertical filament. Home Depot still had some a few years ago in 40 & 60 watt sizes. eBay still sells some 100 watt versions by the case but make sure the seller knows that t...
by jrburns47
Tue Oct 17, 2017 9:02 pm
Forum: Beginning Holography
Topic: Transmission holograms with relief structures
Replies: 5
Views: 3662

Re: Transmission holograms with relief structures

Are you attempting to commercially replicate the EOTech sight?
by jrburns47
Mon Sep 18, 2017 8:42 am
Forum: For Sale / Want to Buy / Trade
Topic: Wanted to buy: Newport vph-3&4, SP 3&4, C-1 collars
Replies: 1
Views: 2224

Re: Wanted to buy: Newport vph-3&4, SP 3&4, C-1 collars

Quick update. Got all of that equipment I was looking for. Thanks to all that sent leads!
by jrburns47
Sun Sep 10, 2017 11:06 am
Forum: For Sale / Want to Buy / Trade
Topic: Wanted to buy: Newport vph-3&4, SP 3&4, C-1 collars
Replies: 1
Views: 2224

Wanted to buy: Newport vph-3&4, SP 3&4, C-1 collars

Hi,
I'm looking for a half dozen each of Newport VPH-3&4 tubes, SP-3&4 posts, and C-1 post collars in reasonable condition.
Thanks.
by jrburns47
Sun Sep 10, 2017 11:05 am
Forum: For Sale / Want to Buy / Trade
Topic: Wanted to buy: Newport vph-3&4, SP 3&4, C-1 collars
Replies: 0
Views: 2683

Wanted to buy: Newport vph-3&4, SP 3&4, C-1 collars

Hi,
I'm looking for a half dozen each of Newport VPH-3&4 tubes, SP-3&4 posts, and C-1 post collars in reasonable condition.
Thanks.
by jrburns47
Thu Sep 07, 2017 8:10 am
Forum: For Sale / Want to Buy / Trade
Topic: Wanted to buy: NRC Newport MMB & MB-1 mag bases
Replies: 0
Views: 2661

Wanted to buy: NRC Newport MMB & MB-1 mag bases

Hi,
Looking for a few Newport MMB mag bases if you have some extras at a reasonable price. Could also use a few MB-1 mag bases, VPH-3 & 4 tubes in good condition, and posts for them.
Thanks,
JB
by jrburns47
Thu Sep 07, 2017 7:21 am
Forum: For Sale / Want to Buy / Trade
Topic: Holotest Plates on eBay
Replies: 3
Views: 2843

Re: Holotest Plates on eBay

Great. Thanks for update.