Are there any multi-spectrum glasses in production or in the works that would allow someone to see in the different light wavelengths? Sort of like what the Predator has in the movies.. =b
That would be awesome if people could use that to view the night sky and see many different things other than visible light structures/objects. Or is it even possible unless the glasses themselves had really really powerful lenses??
8)
Multi-Spectrum Glasses?
-
astrolabe
- Science Officer
- Posts: 499
- Joined: Wed Feb 13, 2008 1:53 am
- Location: Old Orchard Beach, Maine
Hello Arramon,
I don't know of any products in the works but this is interesting:
Your continued donations keep Wikipedia running!
Interference filter
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An interference filter or dichroic filter is an optical filter that reflects one or more spectral bands or lines and transmits others, while maintaining a nearly zero coefficient of absorption for all wavelengths of interest. An interference filter may be high-pass, low-pass, bandpass, or band-rejection.
An interference filter consists of multiple thin layers of dielectric material having different refractive indices. There also may be metallic layers. In its broadest meaning, interference filters comprise also etalons that could be implemented as tunable interference filters. Interference filters are wavelength-selective by virtue of the interference effects that take place between the incident and reflected waves at the thin-film boundaries.
Bandpass filters are normally designed for normal incidence. However, when the angle of incidence of the incoming light is increased from zero, the central wavelength of the filter decreases, resulting in partial tunabilty. In addition, the transmission band widens and the maximum transmission decreases.[1] If λc is the central wavelength under an angle of incidence θ < 20°, λ0 is the central wavelength at normal incidence, and n* is the filter effective index of refraction, then:
For example, for λ0=1550 nm, n*=1.5, Δλ = λ0-λc=32 nm, the rotation angle is θ = 17.5°. This corresponds to C-band or L-band in 1550 nm fiber-optic communications window. Equipped with a stepper motor and electronics, a tunable optical filter that tunes center transmission wavelength over C-band or L-band by remote control can be achieved. See diagram below for its working principle and tunable optical filter devices[2]
Working principle of a tunable optical filter based on rotating interference filter.
[edit] References
^ P. H. Lissberger and W. L. Wilcock, J. Opt. Soc. Am., 49 p. 126-130, (February 1959).
^ Tunable Optical Filters
M. Bass, Handbook of Optics (2nd ed.) pp. 42.89-42.90 (1995)
Retrieved from "http://en.wikipedia.org/wiki/Interference_filter"
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I don't know of any products in the works but this is interesting:
Your continued donations keep Wikipedia running!
Interference filter
From Wikipedia, the free encyclopedia
Jump to: navigation, search
An interference filter or dichroic filter is an optical filter that reflects one or more spectral bands or lines and transmits others, while maintaining a nearly zero coefficient of absorption for all wavelengths of interest. An interference filter may be high-pass, low-pass, bandpass, or band-rejection.
An interference filter consists of multiple thin layers of dielectric material having different refractive indices. There also may be metallic layers. In its broadest meaning, interference filters comprise also etalons that could be implemented as tunable interference filters. Interference filters are wavelength-selective by virtue of the interference effects that take place between the incident and reflected waves at the thin-film boundaries.
Bandpass filters are normally designed for normal incidence. However, when the angle of incidence of the incoming light is increased from zero, the central wavelength of the filter decreases, resulting in partial tunabilty. In addition, the transmission band widens and the maximum transmission decreases.[1] If λc is the central wavelength under an angle of incidence θ < 20°, λ0 is the central wavelength at normal incidence, and n* is the filter effective index of refraction, then:
For example, for λ0=1550 nm, n*=1.5, Δλ = λ0-λc=32 nm, the rotation angle is θ = 17.5°. This corresponds to C-band or L-band in 1550 nm fiber-optic communications window. Equipped with a stepper motor and electronics, a tunable optical filter that tunes center transmission wavelength over C-band or L-band by remote control can be achieved. See diagram below for its working principle and tunable optical filter devices[2]
Working principle of a tunable optical filter based on rotating interference filter.
[edit] References
^ P. H. Lissberger and W. L. Wilcock, J. Opt. Soc. Am., 49 p. 126-130, (February 1959).
^ Tunable Optical Filters
M. Bass, Handbook of Optics (2nd ed.) pp. 42.89-42.90 (1995)
Retrieved from "http://en.wikipedia.org/wiki/Interference_filter"
Categories: Optical filters | InterferenceViewsArticle Discussion Edit this page History Personal toolsLog in / create account Navigation
Main Page
Contents
Featured content
Current events
Random article
Search
Interaction
About Wikipedia
Community portal
Recent changes
Contact Wikipedia
Donate to Wikipedia
Help
Toolbox
What links here
Related changes
Upload file
Special pages
Printable version
Permanent link
Cite this page
Languages
Deutsch
Svenska
This page was last modified on 28 June 2008, at 17:52. All text is available under the terms of the GNU Free Documentation License. (See Copyrights for details.)
Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a U.S. registered 501(c)(3) tax-deductible nonprofit charity.
Privacy policy About Wikipedia Disclaimers
"Everything matters.....So may the facts be with you"-astrolabe
-
astrolabe
- Science Officer
- Posts: 499
- Joined: Wed Feb 13, 2008 1:53 am
- Location: Old Orchard Beach, Maine
Okay, let me try this again.
Cut, paste..... Nope. Cut, cut, paste...... Nope. Cut,copy,paste................. Ahem. ......Select all, then cut, copy,copy copy,paste............. Shucks! Okay....Cut,cut,cut,copy,copy, copy,and.......paste,paste.....paste. Darn Paste...Paste...paste,paste.........................PAAAAAAASTE!!! $%#@*&#$%&*$%#.....................AAAAARRRRRRRGGGGGGHHHHHHHH
Cut, paste..... Nope. Cut, cut, paste...... Nope. Cut,copy,paste................. Ahem. ......Select all, then cut, copy,copy copy,paste............. Shucks! Okay....Cut,cut,cut,copy,copy, copy,and.......paste,paste.....paste. Darn Paste...Paste...paste,paste.........................PAAAAAAASTE!!! $%#@*&#$%&*$%#.....................AAAAARRRRRRRGGGGGGHHHHHHHH
"Everything matters.....So may the facts be with you"-astrolabe
Okay okay... so then glasses/goggles equiped with this type of filter can have a knob that finely tilts the interference filter lense and changes the viewable spectrum of the incoming light. Nice..! But how far out can you view incoming light and actually tune the wavelengths to view certain sections of it using this little filter screen?
I think with normal goggles that have magnification, you'd need professional ones that work good in the first place to view nighttime objects. Adding the tilting filter could be placed somewhere within, allowing the light that passes from front lense to back (and becomes magnified) to be filtered by the screen (or mirror or whatever it is the interference filter is made of) and viewed in whatever spectrum you set it at. Real-time multi-wavelength light spectrum analyzing. =)
The link at the bottom for a device already for sale is cool:
http://www.optoplex.com/Optical_Tunable_Filter.htm
Kind of big to use with goggles/glasses, and it looks like you need a device to capture light first (IN), transmit that light source to the filter device, and then send that filtered light to another device (OUT) that shows the final filtered spectrum.
So then you could have your telescope or whatever you use (cameras or whatever) capture the night sky, and have that data sent through the filter (IN) and the final outcome sent to the computer (OUT) or to glasses/goggles that can show a screen of the different spectrums that were filtered for that particular part of the sky captured.
I LIKE IT!! I'd buy that for a dollar..!
I think with normal goggles that have magnification, you'd need professional ones that work good in the first place to view nighttime objects. Adding the tilting filter could be placed somewhere within, allowing the light that passes from front lense to back (and becomes magnified) to be filtered by the screen (or mirror or whatever it is the interference filter is made of) and viewed in whatever spectrum you set it at. Real-time multi-wavelength light spectrum analyzing. =)
The link at the bottom for a device already for sale is cool:
http://www.optoplex.com/Optical_Tunable_Filter.htm
Kind of big to use with goggles/glasses, and it looks like you need a device to capture light first (IN), transmit that light source to the filter device, and then send that filtered light to another device (OUT) that shows the final filtered spectrum.
So then you could have your telescope or whatever you use (cameras or whatever) capture the night sky, and have that data sent through the filter (IN) and the final outcome sent to the computer (OUT) or to glasses/goggles that can show a screen of the different spectrums that were filtered for that particular part of the sky captured.
I LIKE IT!! I'd buy that for a dollar..!
-
BookWorm
Re: Multi-Spectrum Glasses?
DARPA (Defense Advanced Research Projects Association) has contracted out for the first true Multi-Spectrum goggles to replace military Night Vision. The link below gives a little information about the project, but it is now well beyond night vision. Multi-spectrum sensors will display a fused, enhanced infrared image in goggles about the size of ski goggles. This will allow users to have a panoramic view and day/night capability as opposed to the night only binocular type devices currently in use. The good news for everyone else is that the commercial applications will come quickly and in a couple of years we'll be seeing similar technology in things like smartphones.
The article in this link talks about some basic developments early in the program, but there is much more in the works. You can also read about enhanced infrared in WRAITH, a technothriller by former Stealth pilot James Hannibal. His tech is supposed to be pretty accurate to what is being developed.
http://www.hightech-edge.com/new-film-o ... sion/8214/
The article in this link talks about some basic developments early in the program, but there is much more in the works. You can also read about enhanced infrared in WRAITH, a technothriller by former Stealth pilot James Hannibal. His tech is supposed to be pretty accurate to what is being developed.
http://www.hightech-edge.com/new-film-o ... sion/8214/