Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
Results not typical.

idea: add, search, annotate, link, view, overview, recent, by name, random

meta: news, help, about, links, report a problem

account: browse anonymously, or get an account and write.

user:
pass:
register,


                             

It's dark and we're wearing sunglasses

One-way shades for wearing at night
  (+3, -4)
(+3, -4)
  [vote for,
against]

When your shades are an intrinsic part of your fancy-dress costume (Neo, Blues Brothers etc), it can be irritating to have to remove them to facilitate vision in dark parties/clubs – relegating your persona to a bloke in a suit.

These shades use the same material as one-way shaded glass, allowing light in one way but not the other, so you can see everything when it's dark but you still have your shades on.

Can also be worn by morons on the tube.

theleopard, Dec 04 2009

[link]






       ...or, the glasses could look like very dark glasses but be entirely opaque. The wearer would see the world in front of them in tiny LCD screens on the back of each lens projected into the eye through corrective lenses. This would have the advantage that IR/night-vision modes could be used, and the screens could also support the display of text messages, stock information, song lyrics, chat-up line hints, etc.
hippo, Dec 04 2009
  

       These are called mirrored sunglasses.
ldischler, Dec 04 2009
  

       Mirrored sunglasses still blot out the sun, or in this case the ambient light from the bar, so you'd still have to take them off to see anyone or anything around you.
theleopard, Dec 04 2009
  

       Maybe so, but what you described is still mirrored sunglasses.
ldischler, Dec 04 2009
  

       Then you're right, it is a good name for them.
theleopard, Dec 04 2009
  

       One way glass is still tinted glass, it will still reduce the light reaching the eyes. There is no such thing as a glass that will appear dark from one direction and pass all the light to the other.
MechE, Dec 04 2009
  

       Do these only work when you're 206 miles from Chicago?
Dub, Dec 04 2009
  

       I end up wearing my sunglasses on the tube because the actual underground portion of my journey is not a lot, so I forget I've got them on.
Ian Tindale, Dec 04 2009
  

       Moron.
theleopard, Dec 04 2009
  

       I'm not even religious.
Ian Tindale, Dec 04 2009
  

       [bigsleep] has it. +
csea, Dec 05 2009
  

       Thanks for the link, bigsleep. I didn't know a metal film could photo-bleach (or the reverse of that, actually), though I suspect this effect is confined to surface in contact with silica. This doesn't apply to theleopard's idea, of course, which doesn't say anything about changing reflectivity--it's just the wearing of ordinary mirrored sunglasses indoors.
ldischler, Dec 05 2009
  

       Transmittance, in the dark, of 45%, you're still losing half your light at any time.
MechE, Dec 05 2009
  

       Yes, theleopard has the common misconception that a one way mirror is exactly what it says (thus violating the second law of thermodynamics and earning an MFD for bad science.) Instead, one way mirrors work by camouflage--the image from the dim side of a partially reflecting mirror is lost in the reflection from the bright side.
ldischler, Dec 05 2009
  
      
[annotate]
  


 

back: main index

business  computer  culture  fashion  food  halfbakery  home  other  product  public  science  sport  vehicle