Talk:Lenticular lens

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    [edit] Holograms

    Isn't it possible to use holograms as lenticular lenses? How? Trekphiler 17:26, 16 August 2007 (UTC)

    The technology is different completely, but many people still confuse the two kinds of products.Bernard SOULIER (talk) 21:13, 9 December 2007 (UTC)

    [edit] External links

    Hi Guys,

    The external links on this page are nothing short of advertisements, with the pages linked to offering lenticular printing services. Please can we have a discussion regarding this before blindly reinstating the pages. I h ave posted a discussion to a couple of anon pages. The pages in question do not comply with WP:LINK as far as i see.

    Thanks User A1 01:09, 4 November 2007 (UTC)

    I referred this issue to Wikipedia:Editor assistance/Requests#lenticular lens, and have followed advice there. Please comment before adding links to this page, such that only links of good quality are included in the article. Thanks User A1 10:54, 4 November 2007 (UTC)


    This discussion was going on months ago. The fact that some of the external links come from commercial companies do not mean that they are advertisement. he HumanEyes link is at list informatory as the DPL link. I am about to resore it and please leave it. Alternatively, take out the DPL link as well as it is as advertising os the other. In my opinion, these are informative links, they contribute to the content of the article and should stay.

    Thanks. —Preceding unsigned comment added by 212.179.74.10 (talk) 12:24, 4 November 2007 (UTC)

    I have examined the discussion from your contribs Special:Contributions/212.179.74.10, and it seems that several editors disagreed with you, and this lead to something of a revert war (for example [1]). I agree with these authors in the discussion, and believe that they should be removed. Please can you, as one of the other editors stated, incorporate any useful information into the article. The external links are commercial in nature, all of them (except the lecture notes i put in). I really am sorry, but they do not add to the article and are being used as a promotional vehicle. I think I will need to create a request for comments here to resolve this issue. Kind regards User A1 20:42, 4 November 2007 (UTC)


    I totally disagree with you that they "add nothing". But if you are going to blindly ban ANY link to a commercial site, than you need to delete Lenstar as well. They may appear to not be affiliated with a company but who do you think paid for this site? The answer is that one of the major lens manufacturers did and this is a completely commercial site as well. So while I think you are making a real mistake by banning sites solely based on the fact that they are commercial and ignoring whether they have information that is relevant and helpful, if that is your call and you wish to make it, you'll need to ban Lenstar if you wish to be consistent. —Preceding unsigned comment added by 76.81.31.15 (talk) 22:52, 7 November 2007 (UTC)

    Sorry, I have messed up the RfC submission and will fix this in about 12hrs. As per the lenstar link, I have removed it a couple of times, if it appears up before this discussion is complete, feel free to move it into the hidden section in the mean time. Thank you for commenting and I will have a chance to more fully address these issues shortly (P.S. don't forget to sign your name with four tilde symbols ~~~~ when you are finished commenting, the editor will substitute the date and time of your comment. Regards User A1 23:14, 7 November 2007 (UTC)

    [edit] Shorten Manufacturing/expert attention

    The section on Manufacturing was merged into the article from Manufacturing technic of a lenticular product following an AfD but although abbreviated from the source is long enough to negatively impact readability of the article. The attention of an expert who can appropriately abbreviate this material would be appreciated. --Moonriddengirl (talk) 15:49, 8 December 2007 (UTC)

    [edit] Water wetting (1° simplification)

    by Bernard SOULIER (talk) 15:16, 17 December 2007 (UTC)

    [edit] UV Ink (2° simplification and internals links)

    by Bernard SOULIER (talk) 16:34, 17 December 2007 (UTC)

    [edit] Water wetting (internals links)

    Bernard SOULIER (talk) 17:08, 17 December 2007 (UTC)

    [edit] Supplement important manufacturing defects of the material lenticular

    Bernard SOULIER (talk) 17:26, 17 December 2007 (UTC)

    [edit] Material removed

    I have removed the following uncited claim from the article. If anyone can provide a citation to support it, or better still can put Fraler's work into historical context, please feel free to work it back into the article. What is really needed is an expanded and improved history section.

    The term was invented and coined by the physicist Dr. Joseph Robert Fraler from Dallas, TX.

    --Srleffler (talk) 20:06, 22 December 2007 (UTC)

    [edit] SEM image

    Hello, With regards to the linked SEM image and its removal - If you take an SEM image, you generally centre the subject. Futhermore you use scalebars that are appropriate to the image, and clearly displayed. The measurements there are very low resolution and frame the information exceptionally poorly. Yes SEM images can be cool, no I don't think these ones are. Also 10kV is a very low accellerating voltage. if those distances as marked are 300um, then this probably would be clearer (and better looking) as an optical image. User A1 (talk) 23:55, 22 December 2007 (UTC)

    hello, I think the explanation is simple to understand and that the images are also quite clear. 83.201.140.146 (talk) 13:34, 24 December 2007 (UTC)

    Besides the comments above, it is not really appropriate to have a whole paragraph in a Wikipedia article that is based on images that are hosted on another site. If you want to have a section discussing manufacturing defects, that's fine, but the images should be released under a suitable license, and displayed inline in the article, not linked to on another site. Note also that conflicts of interest by editors are not acceptable on Wikipedia. Editors are strongly discouraged from linking to their own websites, or their employer's websites. Such links are generally removed very quickly. Persistant linking to a corporate website is likely to result in all links to that site being expunged from Wikipedia.--Srleffler (talk) 02:52, 3 January 2008 (UTC)

    [edit] Split (and merge)

    I think the combination of lenticular corrective lenses and lenticular printing in one article is not helpful. I propose to split this article into two: Lenticular printing, which will contain the bulk of this article's contents, and a second article on lenticular lenses other than those used for lenticular printing (at present the only material we have on that is the section on lenticular ophthalmic lenses). At some point material from Optical lenticular can be merged into the new lenticular printing article, or perhaps it can be kept as a separate article on the physics behind lenticular images. Either way, that article needs a lot of work first.--Srleffler (talk) 20:08, 31 December 2007 (UTC)

    Comments?

    I think it is a good idea to perform the merge, but some of the printing information can be culled. I am wary of the possibility of copyvio original reserach on the other page, as until now I had never seen that article. As for splitting the printing and physics/optical phenomena, I think that this article should be first merged, then wait a while until the merge is somewhat stable, then re-examine the need to split. User A1 (talk) 05:28, 3 January 2008 (UTC)
    I would rather split first, then merge. The need for a separate article on lenticular printing seems clear to me. It's not so clear how or if the material at lenticular optics (formerly Optical lenticular) should be merged in. Besides needing a lot of cleanup work, that article has serious tone and WP:NOT problems. (Wikipedia is not a textbook.)--Srleffler (talk) 18:33, 3 January 2008 (UTC)

    [edit] Power requirements

    Hello,

    In the article it states that the UV curing process has an energy density of 200W/cm^2. By my simple calculations this means that for an [ISO_216|A0] page, 1m^2 area, you need (100^2)*200 W of power to cure. This would be 1e4*200W = 2e6W, which is 2MW of power to cure. For a 120V power supply you would need at minimum (ignoring losses) 16.7kA of current (Most houses have 10-20A). If this is coming of a mercury vapour lamp, my understanding is that they take some time to come to steady state, so this would be on for a while.

    I realise that without residence time, it may not be valid to make this calculation, as it may be running past a strip light source very quickly and therefore whilst the power density is high, the total power may not be due to the reduced area, but still that's a lot of power density. Is this right?

    If I assume that the machine operates via a strip source, of width 1cm, then this reduces the power requirements by a factor of 100, so instead of 16.7kA, we have 167A, which is still a lot of current, although not impossible. Does anyone have a citation for that curing power density? User A1 (talk) 05:58, 3 January 2008 (UTC)

    hello, Look at [[2]]90.9.110.105 (talk) 15:11, 3 January 2008 (UTC)
    My bad.When cleaning up the section I presumed that the values in W/cm were supposed to be intensities in W/cm². I'm not sure what a W/cm is, but clearly that is the unit that is used.--Srleffler (talk) 18:05, 3 January 2008 (UTC)
    As for the reference. I see the numbers but can't understand their context - Unfortunately I don't speak fluent french! User A1 (talk) 23:28, 3 January 2008 (UTC)
    I'm not fluent, but I'll take a stab at it:

    Ce réflecteur permet, avec une puissance de lampe de seulement 160 W/cm, d'atteindre une vitesse d'impression qui était jusqu'à présent réservée à une puissance de lampe de 200 W/cm. À puissance électrique égale, le rendement de lumière UV peut être augmenté d'environ 20 % sur le substrat par rapport à un ancien modèle.

    This reflector permits, with a lamp power of only 160 W/cm, the attainment of a printing speed that was until now reserved to lamp powers of 200 W/cm. Given equal electrical power, the UV light output could be augmented by around 20% at the substrate, compared to an old model.

    A little further down, the article discusses another curing system that uses 240 W/cm lamps. The gist of the article seems to be about how performance of curing systems has been improved by ensuring that as much of the lamp's UV output as possible reaches the printing medium, and as little of the infrared, to minimize heating of the medium.--Srleffler (talk) 04:13, 4 January 2008 (UTC)
    If it is only quoting the power per unit length of the lamp, I will assume this means it is a strip-based curing technique, whereby relative to the light, the lenticular is moved to perform the curing. If this is the case, we cannot attempt to infer or calculate any power densities in terms of per unit area, as to do this would require knowledge of the lamp geometry and the speed of the lenticular with respect to the lamp. I would suggest this claim requires alternate data. User A1 (talk) 10:48, 4 January 2008 (UTC)