Talk:Night-vision device

message: Just a note - I removed the XD-4 link from "Systems."
Three reasons -
1) XD-4 is not a system - it's a tube manufactured by DEP Photonis.
2) It's not Gen3. It's Gen2. Both the XD-4 and the XR5 which replace it are Gen2. They have a Gen2 photocathode and do not use an ion barrier film.
The most important part there is that they use the Gen2 photocathode, which limits the sensitivity in the near-IR region (see the datasheets!!!)
The result of this is that although both the XD-4 and XR5 are exceptional tubes and outperform most Gen3 tubes in urban conditions, in rural dark areas they do not have the ability to make the most of starlight...
If anyone doubts this, please the DATASHEETS. XD-4 and XR5 both show significant loss of sensitivity at 800 and 850 and has a very low sensitivity at 2850K compared to even basic Gen3, which has almost double this.
Manufacturer Datasheets: http://www.photonis.com/nightvision  —Preceding unsigned comment added by David kitson (talk • contribs) 23:09, 27 February 2009 (UTC)
thread_title:  Gen2/ Gen3 systems 

message: "There are currently goggles that combine both of these technologies to create images that are almost as clear as day." Both of which technologies? The article lists three.--SpacemanAfrica 19:13, 18 June 2006 (UTC)
replies: text: I have removed the third example (heat-sensing), since these are generally not considered night vision devices according to the Night vision article itself. However I'm not sure if the sentence refers to the 2 remaining technologies. —Squalla 20:04, 18 June 2006 (UTC)
thread_title:  Technologies 

message: I have not found anything about it, but I would guess that active goggles would show an enemy where the user was (similar to using a flash light/electric torch). This would require another set of night vision goggles or just an IR camera. --Midnightcomm 03:06, 4 September 2006 (UTC)
replies: text: The 4x targetscope of the common soviet block SVD Dragunov sniper rifle has a special filter film insert, which will produce a visible bright dot where an infrared emitter is radiating, so the shooter can put out the illuminator with a well-aimed bullet. 82.131.210.162 13:03, 3 December 2007 (UTC)
thread_title:  Active goggles giving away position? 

message: I thing that this page should be moved to Night Vision Device or Night vision device. It is a more accurate and inclusive description. Also the part about fluid replacements seems unnecessary. Any thoughts? 
Tmaull 18:31, 10 May 2007 (UTC)
thread_title:  Move page? 

message: I have commented out several sections from a previous edit by User:Bruno_Timpano. I believe they do not fall within the subject matter of this page and belong elsewhere. I haven't deleted them, they are still available. However, does anyone think they should stay? What reasons? Also, most of Bruno's edits were uncited, although many appear to be likely. Any verification of this information would be appreciated. Thanks, Tmaull 17:41, 29 July 2007 (UTC)
thread_title: A Few Notes

message: I've seen several reputable shops offering GEN IV goggles. Is that the Omnibus Gen VII System? Tierlieb (talk) 11:30, 21 December 2007 (UTC)
replies: text: Yeah. Gen I, II, and III are terms defined by the US Military. Gen IV has not been defined by them, but some commercial outfits think that the later Omnibus systems are so advanced over the Gen III that they deserve a new generation. The consensus here as been to wait until the military designates them as such, although the differences between the later Omnibus systems and the early Gen III systems have been discussed. --Tmaull (talk) 17:28, 21 December 2007 (UTC)
thread_title:  Gen 4 goggles? 

message: Well, I can confirm that NVD are considered "artificial illumination" in Norway - where I hunt -  and are thus illegal for all hunting purposes, with the very minor exception of fox hunting by baiting (where illumination is traditional and thus allowed). I doubt the sources could be dug up in English easily, but it is nonetheless a matter of fact. 80.202.97.203 (talk) 00:28, 3 January 2008 (UTC)
replies: text: Here in Hungary all electron-optics are banned for night hunting as unethical, except lightbulb-illuminated reticles in traditional optical rifle scopes. You are not even allowed to observe the landscape with a handheld NVG binocular while hunting. This has bad safety implications. 91.83.29.157 (talk) 22:36, 15 November 2008 (UTC)
thread_title:  Legality for hunting 

message: Theres a picture of a soldier with a weapon mounted sight and the caption says it's a night vision device. To me it looks more like an ordinary Elcan produced optical scope M145 that US Army uses on machine guns. Elcan also produces a night vision device SpecterNV3.0x that looks a bit similar, but I don't think the device in the picure is it. Should the picture be removed? --130.234.5.136 (talk) 16:46, 20 May 2008 (UTC)
thread_title: Picture of a soldier

message: It's actually the introduction to the next main section about generations. Looks like somebody's overwritten the passive paragraph accidentally. I'm not familiar with the process of retrieving from old pages so I'll leave it to somone else.  —Preceding unsigned comment added by 78.33.123.161 (talk) 05:54, 8 August 2008 (UTC)
thread_title:  paragraph under subtitle "passive" 

message: In the sentence "Many NVDs also include sacrificial lenses, IR illuminators, and telescopic lenses.": what are these sacrificial lenses? We asked our pilots, and they never heard of it... An explanation is needed!  —Preceding unsigned comment added by 80.156.44.178 (talk) 11:36, 26 August 2008 (UTC)
replies: text: The article probably wanted to say "spherical" lenses, pretty obvious. 91.83.29.157 (talk) 22:32, 15 November 2008 (UTC)
thread_title: Sacrificial lenses?

message: As a resident of England in the United Kingdom and user of image intensifier night vision equipment I can say that at no time have I found any artical of legality in Great Britain prohibiting the use of any class of these devices. Over 30 yaers I have used such equipment as a soldier and civilian, and indeed I now use a 300 milliwatt laser to illuminate the viewed object. There may be restrictions of usage in other European countries pertaining to night vision devices and illuminators but this certainly does not apply in the United Kingdom.
The laser I use to illuminate is a class 111B which is more than capable of burning dark objects at close range, but again this is not illegal within Great Britain.
It is also worth noting that a laser of this power can be too bright for practical use at close range, that is to say, less than 50 metres (about 150 yards)
With regard to battle field use, my experence is that great care must be taken when viewing the objective since the green glow reflected from the tube to the observer is easily seen and can compromise the user's position. This also applies to the use of illuminators, while some are truly infrared, and not visible to the naked eye, older image intensifiers of generation 1 type, and some generation 2 type, require an illuminator that is more toward the "red" end of the light spectrum, and therefore easily seen by another person using  image intensifier equipment. It is more functional for anyone wishing to take advantage of the darkness to allow around 20 minutes for their eyes to adjust to the dark, and indeed, one will notice a large difference between each eye at night if using a night vision monocular, the green light emitted from the tube tends to render one eye nearly useless for some time after viwing through a night vision device.. 
Colonel jones (talk) 11:46, 9 September 2008 (UTC)
replies: text: Here is Hungary the restriction against Gen 2,3,4 ownership is strictly enforced. Civilians can buy a gen1+ device like the russian import "Baigish-12", but gen2 tube "Baigish-6" or anything better is beyond reach for private customers. The first-gen Baigish-12 is good enough, the hungarian border guard used it in service, but a gen2 or gen3 device will see 3x-5x further, even on nights with no moon and that does make a difference. 91.83.29.157 (talk) 22:31, 15 November 2008 (UTC)
replies: text: And as a German and a resident of Germany, employed in a law firm, I can say there is absolutely no law restricting German citizens from possession of any IR device.  --141.91.129.2 (talk) 09:23, 24 August 2009 (UTC)
replies: text: Hungary is probably the exception, as these days the government is extremely paranoid about "terrorism" (actually, a potential uprising of the increasingly poor and hopeless people against the government, which consists mainly of former Commies), and takes early steps against it. This affects not only modern night vision devices, but also, for example, military camouflages and bug detectors. Also, now even the import of dual-use goods is regulated - unlike any other EU country. Recently I learned that the almost total ban of guns for citizens took place directly after the revolution of 1956, so no wonder. --85.181.91.64 (talk) 23:37, 2 February 2010 (UTC)
thread_title:  Legality 

message: I came to this article from one on fluoroscopy, after clicking on a link for "image intensifier", which redirected to "Night vision device".  Now, correct me if I'm wrong, but a night vision device is a *subset* of image intensifiers.  Wouldn't it make more sense to have an article on image intensifiers, with a section in it on night vision devices as one particular application of image intensification? Critterkeeper (talk) 05:11, 13 September 2008 (UTC)
thread_title:  Wrong choice what to redirect where 

message: The article does a very poor job in describing how these things work. As I understand it, the structure of the device is someway similar to the optics in a single-lens reflex camera, with light projected on a focusing screen by the primary optics and viewed through the viewfinder optics. To compensate for the inversing effect of the camera obscura, camera viewfinders uses a prism to rotate the image. Do night vision devices have similar structures? If so, shouldn't they be described in this article? -- Petri Krohn (talk) 13:03, 28 July 2010 (UTC)
thread_title:  Why is the picture not upside down? 

message: This article does not contain images of what a person can expect to see while wearing NVGs. 76.10.150.209 (talk) 05:01, 17 December 2011 (UTC)
thread_title: View through NVGs

message: There are 2 pictures mentioning "LUCIE" and describing it as fourth-generation. This article clearly states that there is not a 4th generation and no where is explained what a lucie is. Can someone clarify or perhaps we should remove the pictures all together?   FrostedΔ14  16:48, 24 June 2012 (UTC)
thread_title:  Fourth-generation LUCIE? 

message: To what extent does this technology allow someone to see in the middle of the night or in otherwise very dark conditions? How much "light gain" is there? I came to this article hoping to find information about these and similar questions but found no answer. Some TV programs (documentaries) use night vision cameras, but sometimes it seems to me to be a gimmick, to add some drama to an otherwise tame program. If the military use this technology, I guess it is useful, but can the usefulness and the gain be quantified? Thanks to all the editors. AugustinMa (talk) 13:34, 28 July 2012 (UTC)
thread_title:  Efficiency 

message: Several recent updates over the past 6 months ( specifically the "Comparison between leading US and European technology" and information on CORE technology, which is just a new brand of Gen1 tube ) are simply marketing information and contain opinion and not fact. I'll leave this for discussion for a couple of weeks, then set around cleaning up what is there. The information appears to be related to pushing "Photonis" technology and "Armasight" products. Some of the information may be accurate, but lacks citations. Other information is grossly inaccurate and needs to be removed. — Preceding unsigned comment added by  (talk • contribs) 
I've removed as many WP:BROCHURE instances as I could find, and cleaned up confusing parts that resulted from their absence. A bot detected this as vandalism, but hopefully the most recent edit will stick... Stochtastic (talk) 16:27, 28 October 2015 (UTC)
thread_title:  Article has been over-run by commercial interests and is no longer unbiased or accurate 

message: I don't even see the word green when I use CTRL-F.
I was looking in several articles to see why the color in Riot (TV series) is different from the color I usually see when someone is using night vision technology on TV or in a movie I am watching on TV.— Vchimpanzee ·  talk · contributions · 18:20, 11 June 2014 (UTC)
replies: text: Is this the place to add the answer to the question? I received some answers here but nothing that I feel I can work with yet.— Vchimpanzee •  talk • contributions •  19:35, 9 July 2014 (UTC)
thread_title:  Why is everything green? 

message: The article's title is "Night vision device". "night [sic] vision device" is used throughout the article when discussing the generic term. Why, then, is the term capitalized in the lead as Night Vision Device? And why do my edits to alter the capitalization to adhere to the stylistic standard keep getting reverted with no explanation whatsoever? 72.200.151.15 (talk) 17:35, 21 June 2016 (UTC)
thread_title:  Capitalization 

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thread_title:  External links modified 

message: "A U.S. Army aviator uses a pair of helmet-mounted AN/AVS-6 vision goggles. The effect on the natural night vision of the eye is evident" What does the last sentence mean? It's not evident to me? Thank you. L3X1 (distant write) 18:51, 22 April 2017 (UTC)
thread_title:  First Image caption makes no sense 

message: What kind of wavelengths of IR are used?  IR is a big category, 13x as broad as  visible light, so imagine 78 colors of the rainbow.  Theinfrared article just says that night vision uses near-infrared, and Near-infrared is 0.75–1.4 μm.  Probably night vision uses a much narrower band than that.   Here's some clues, but nothing on specific products sold online: Infrared_vision#The_infrared_spectrum
Here's a comment on a site that  sells such devices, from a customer:  "I would recommend the SiOnyx Aurora Black Full-Color Night Vision Camera. The SiOnyx Aurora Black Full-Color Night Vision Camera is a tactical night vision solution for those who need full-color night vision capability at an affordable cost. It is sensitive to wavelengths from 400 to 1100nm, and it provides a full-color image with light levels as low as 2 millilux."  This is some guy, so I don't think I should reference this.  But that's all visible light, and much of the Near Infrared band.  In Color, so it samples multiple frequencies, sounds cool.  
Searching for the words "mm" and "wavelength".  Nothing anywhere, including manufacturer websites.  Mostly they tell you like "532nm", which is the green color they display it to you, not what it's sensitive to.
This article explains a lot, in particular, that there's "night vision" which does Near IR, and "thermal" which does much longer wavelengths, around 300°K, which I think is about 7µm?  maybe up to 1000µm?  https://www.sionyx.com/pages/how-night-vision-works
OsamaBinLogin (talk) 20:56, 20 August 2022 (UTC)
replies: text: @OsamaBinLogin Had a bunch of edits that I hadn't finished up until recently.  Should answer most of your questions (except for the full color which I don't know much about). Jasonkwe (talk) (contribs) 10:05, 21 August 2022 (UTC)
thread_title:  Wavelengths?  Frequencies?