Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



Laser Pointer Store

What is the enjoyment?

GSS

Well-known member
Joined
Apr 28, 2015
Messages
3,484
Likes
1,334
Points
113
I went to DisneyLand in the late 70's and was amazed with the hologram when I rode through the haunted house. Of what I remember it would be just as fascinating to see it today. That green ghost had his arm around me:eek: I won't begin to ask what setup that was:)
When you view a gas laser beam doe's the beam stop absorb the dot splash for nice viewing or is it a the quality of the laser itself?
 
Last edited:

trencheel303

Well-known member
Joined
Dec 10, 2013
Messages
1,414
Likes
267
Points
83
Although I don't have any gassers, (space constraints, money) I can completely understand why people do - for the same reason as a hobby lightbulb collector I lust after early electric lighting technologies like carbon filament and medium pressure mercury lamps (which btw are gorgeous, and anyone who appreciates a gas laser would be sure to appreciate an early mercury lamp). It's nostalgia and appreciation for the evolution of the tech, and like light bulbs to LED counterparts, gas lasers still perform better in some areas, like beam spec?
 

paul1598419

Well-known member
Joined
Sep 20, 2013
Messages
13,238
Likes
1,741
Points
113
I went to DisneyLand in the late 70's and was amazed with the hologram when I rode through the haunted house. Of what I remember it would be just as fascinating to see it today. That green ghost had his arm around me:eek: I won't begin to ask what setup that was:)
When you view a gas laser beam doe's the beam stop absorb the dot splash for nice viewing or is it a the quality of the laser itself?
Though I haven't been, I've seen documentaries of the place and of what you speak, and they are not holograms. They are an optical illusion based on a toy that makes a penny appear to float above a plastic base. Disney Land's illusions were made prior to the first hologram made with a laser. Dennis Gabor made a rudimentary hologram with polarized sodium light, but it had no depth to it.
 

GSS

Well-known member
Joined
Apr 28, 2015
Messages
3,484
Likes
1,334
Points
113
You could only see the ghost image when you passed by a mirror as I remember, cause my first reaction was to look behind me and I couldn't see any "ghost"!
 

paul1598419

Well-known member
Joined
Sep 20, 2013
Messages
13,238
Likes
1,741
Points
113
Yeah, a true hologram would be seen through a film of the fringe patterns embedded in the film of the object wave. Disney used a well known optical illusion to create their effect.
 
Joined
Jul 23, 2008
Messages
1,120
Likes
74
Points
0
I have one Hene and shes a 612nm mells giret totally orange like a sunkist can. I can't wait for 620 some nm dioides to be cheaper in maybe a few years. I'd love to see that wl.

its fun to close the shutter and experiment with only letting a little light out.

Since it's only 2mw I out googles on and I can see blue glow in it.
 

Chrisbee

New member
Joined
Nov 1, 2015
Messages
373
Likes
132
Points
0
You could only see the ghost image when you passed by a mirror as I remember, cause my first reaction was to look behind me and I couldn't see any "ghost"!
Disneyland likes to use what called "Pepper's Ghost" illusions.
Those types of illusions are actually pretty popular for people that like to go all out for Halloween.
 

GSS

Well-known member
Joined
Apr 28, 2015
Messages
3,484
Likes
1,334
Points
113
Disneyland likes to use what called "Pepper's Ghost" illusions.
Those types of illusions are actually pretty popular for people that like to go all out for Halloween.
Is "Pepper's Ghost" the chosen image? I remember it was green and had a little evil laugh more Disney like than really scary.
 

trencheel303

Well-known member
Joined
Dec 10, 2013
Messages
1,414
Likes
267
Points
83
I have one Hene and shes a 612nm mells giret totally orange like a sunkist can. I can't wait for 620 some nm dioides to be cheaper in maybe a few years. I'd love to see that wl.

its fun to close the shutter and experiment with only letting a little light out.

Since it's only 2mw I out googles on and I can see blue glow in it.
I'd love a 594 or 604 or whatever the yellowish wavelength is. Be a good day when that happens!!
 

CurtisOliver

Well-known member
Joined
Jun 12, 2015
Messages
5,958
Likes
1,466
Points
113
594 is the yellow HeNe. I have been looking on eBay for one. But they are rare to find.
 

diachi

Well-known member
Joined
Feb 22, 2008
Messages
9,447
Likes
1,322
Points
113
I've heard that too. They are still fairly new and not inexpensive, though. There are all sort of holographic technology that I will never be able to do. I'd love to do portrait holography, but need a very short pulsed ruby laser to do that. Some of the newer solid state lasers are great for doing full color holography, but the optics involved are very special and extremely expensive to use. I'll just plod along with my monochromatic reflection holograms.

The Compass series and other SLM DPSS lasers do come up for good prices every now and then - I had one a good few years back. Can't remember the exact price but I must have been a good deal because I was 16 and didn't have much spare cash then (Still don't! :p).

Beam specs on those are just as impressive, if not better than a lot gas lasers. Tightest beam I've ever seen. :D

That said ... I'd still go with gas too. :beer:
 
Last edited:




Top