Notices
Results 1 to 6 of 6

Thread: How small can a camera be?

  1. #1 How small can a camera be? 
    Forum Freshman
    Join Date
    Aug 2014
    Posts
    7
    Is it possible to create a bug or camera or video camera which is invisible to the naked eye and which records in good quality. A camera/video camera which is microscopic just like bacteria?


    Reply With Quote  
     

  2.  
     

  3. #2  
    Forum Cosmic Wizard
    Join Date
    Dec 2013
    Posts
    2,408
    In good quality?
    Probably not.


    Reply With Quote  
     

  4. #3  
    Forum Radioactive Isotope cosmictraveler's Avatar
    Join Date
    May 2005
    Location
    Key West, Florida, Earth
    Posts
    4,789
    Scientists have built a digital camera inspired by the compound eyes of insects like bees and flies. The camera’s hemispherical array of 180 microlenses gives it a 160 degree field of view and the ability to focus simultaneously on objects at different depths.

    Human eyes, and virtually all cameras, use a single lens to focus light onto a light-sensitive tissue or material. That arrangement can produce high-resolution images, but compound eyes offer different advantages. They can provide a more panoramic view, for example, and remarkable depth perception.

    The new artificial version, created by by John Rogers and colleagues at the University of Illinois at Urbana-Champaign and described today in Nature, could potentially be developed for use in security cameras or surgical endoscopes.

    “The resolution is roughly equivalent to that of a fire ant or a bark beetle,” Rogers wrote in an email to Wired. “With manufacturing systems more like those in industry, and less like the academic, research setups that we are currently using, we feel that it is possible to get to the level of a dragonfly or beyond.”





    https://www.google.com/url?sa=i&rct=...09155556077247
    When the power of love overcomes the love of power the world will know peace.
    Jimi Hendrix
    Reply With Quote  
     

  5. #4  
    Suspended
    Join Date
    Aug 2014
    Posts
    167

    LED lights at airports can record video, alert staff to long lines and track behavior deemed suspicious




    and this ...


    Creating a nano-sized light source by electrostatic trapping of nanoparticles in a nanogap

    K Hoshino, K Yamada, K Matsumoto and I Shimoyama
    Show affiliations

    K Hoshino et al 2006 J. Micromech. Microeng. 16 1285. doi:10.1088/0960-1317/16/7/023
    Received 8 December 2005, in final form 13 April 2006. Published 17 May 2006.
    2006 IOP Publishing Ltd

    Abstract

    A MEMS-compatible, simple fabrication technique for a nano-sized light source was developed, and its characteristics were investigated. This technique is a combination of top-down electrode fabrication and bottom-up nanoparticle trapping. As regards this technique, nanoparticles (CdSe/ZnS core-shell nanoparticles) in a solvent were electrostatically trapped in a nanometer-sized gap between two electrodes formed on a p-type silicon on an insulator (SOI) wafer. The width of the nanogap, which was created by electron-beam lithography, was 200 nm. The trapped nanoparticles maintained a bridged form between the electrodes even after the solvent evaporated. Electroluminescence from the nanoparticles in the gap was observed when a voltage was applied to the electrodes. We measured an optical spectrum of the emission to find a peak which corresponds to the bandgap of the nanoparticles. A micro-photoluminescence measurement using a 405 nm laser suggested that the rest of the electrically induced emission was the black body emission of the locally heated nanoparticles. SEM observation showed that the emission area was small, i.e., 60 000 nm2. The nano light source fabricated by our new method is useful for integration with other devices owing to the simplicity of the fabrication method.
    http://iopscience.iop.org/0960-1317/...7_16_7_023.pdf


    and this...
    nanoLight Technologies
    The nanoCam™ concept sidesteps the old external lens, allowing the camera to overcome physical-optical limitations to become truly nanosized. This revolutionary technology allows a high definition mega-pixel camera to be flattened to about the width of a human hair.
    Introducing The NanoCam™
    NanoCam? - An Ultra-Miniature Multi Lens Array 3D Camera
    Reply With Quote  
     

  6. #5  
    KJW
    KJW is offline
    Forum Professor
    Join Date
    Jun 2013
    Posts
    1,134
    I think that when the size of the optical components become small enough to be comparable to the wavelength of light, then diffraction effects will severely impact on the quality of the image.
    There are no paradoxes in relativity, just people's misunderstandings of it.
    Reply With Quote  
     

  7. #6  
    Forum Cosmic Wizard
    Join Date
    Dec 2013
    Posts
    2,408
    Quote Originally Posted by KJW View Post
    I think that when the size of the optical components become small enough to be comparable to the wavelength of light, then diffraction effects will severely impact on the quality of the image.
    Yes, and I must learn to quit being too brief in my answers.
    Airy disk - Wikipedia, the free encyclopedia

    There is also a question about how many pixels you can crowd into a small space, however I agree the major problem would be the difraction limiting effect of a micro-sized aperture. It does not matter how dense the pixels are if you are unable to cleanly focus the image.

    Even my Zeiss microscopes run into this problem (even with monochromatic light sources) and the apertures are not "invisible to the naked eye" size either.
    Reply With Quote  
     

Similar Threads

  1. x ray camera
    By chattunnel in forum Computer Science
    Replies: 18
    Last Post: May 19th, 2014, 04:43 PM
  2. catadioptric (single-camera)
    By dmiller31 in forum Electrical and Electronics
    Replies: 1
    Last Post: July 3rd, 2012, 01:37 PM
  3. camera batteries
    By ken heraty in forum General Discussion
    Replies: 6
    Last Post: June 22nd, 2012, 03:32 PM
  4. freeze clamp as camera?
    By herveboston in forum General Discussion
    Replies: 0
    Last Post: May 12th, 2012, 12:04 AM
  5. How to make a bunch of small microphones in a small space?
    By kojax in forum Electrical and Electronics
    Replies: 2
    Last Post: April 30th, 2008, 04:59 AM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •