Engineering:Lightbox

From HandWiki
Short description: Translucent surface illuminated from behind
Small lightbox opened to reveal workings

A lightbox is a translucent surface illuminated from behind, used for situations where a shape laid upon the surface needs to be seen with high contrast.[1]

Types

Wall mounted lightbox for inspecting medical X-rays
Lightbox used in outdoor advertising
Lightbox designed to produce images with diffuse lighting from all angles
Lightbox used as a Memorial Plaque

Several varieties exist, depending on their purpose:

  • Various backlit viewing devices:
    • A container with several lightbulbs and a pane of frosted glass on the top. It is used by photography professionals viewing transparent films, such as slides.[2] This device was originally used to sort photographic plates with ease. When laid flat, it may be called a light table. Generally, a lightbox uses light similar to daylight (5,000–6,000 kelvins (K)) and has uniform light strength on the glass pane.[3]
    • In the form of vertical panels, they can also be found mounted on the walls of hospitals and medical offices to review X-ray images (X-ray illuminator).[4]
    • In the science field, lightboxes are often used for looking at bacterial growth and allow better visualization for PCR plates.[citation needed]
    • A lighted display panel used for advertising purposes.[5] The panel can be illuminated by fluorescent light bulbs or LED lighting strips. The efficiency of light boxes improved dramatically after the introduction of LED technology. The user inserts a graphic, which can be changed easily. Some light boxes are designed especially for outdoor purposes so they are more weatherproof.[citation needed]
  • An advertising format at Google Ads that allows users to click and expand an ad in order to engage with it.[6]
  • The fabric reflectors that attach to studio lighting via a connector to create soft lighting by diffusing the strobe flash are called "light boxes".[7] They generally come in various rectangle or octagon shapes. Interior reflectors can be white, silver or gold to alter the temperature of light. Baffling inserts are also available.
  • A variation of this is a box, with one open end, made of diffusing material, to allow the photographing of a sample object with no shadows. It is also called light tent or photo cube.[8]
  • A folder used on stock photography to allow a user to organize digital photos. Photos can be assigned to a viewable lightbox folder by subject, for later convenience, or used to compile unrelated photos for a specific project layout. Lightboxes also allow graphic designers to show clients options for a project in one simple uncluttered folder.[9]
  • The card-reader near the door in a hotel room, used as the main electric switch[citation needed]

See also

References

  1. ↑ Tony White (20 June 2014). Animation from Pencils to Pixels: Classical Techniques for the Digital Animator. CRC Press. pp. 309. ISBN 978-1-136-14422-6. https://books.google.com/books?id=IqPcAwAAQBAJ&pg=PA309. 
  2. ↑ Modrak, Rebekah; Anthes, Bill (2011). Reframing Photography: Theory and Practice. Taylor & Francis. p. 453. ISBN 9780415779197. https://books.google.com/books?id=Ck26ZIQ51QIC&pg=PT506. 
  3. ↑ Saddington, Roger (2003). The Quick & Easy Guide to Photographing Your Artwork. Penguin. p. 61. ISBN 9781440317507. https://books.google.com/books?id=whdjDwAAQBAJ&pg=PT61. 
  4. ↑ Al-Azzawi, Abdul (2017). Photonics: Principles and Practices. CRC Press. p. 282. ISBN 9780849382949. https://books.google.com/books?id=6FbLBQAAQBAJ&pg=PA282. 
  5. ↑ Travis, Lily (July 12, 2018). "Light Box Signs And Their Unexpected Benefits For Your Business". https://www.frontsigns.com/blog/lightbox-signs-benefits-for-your-business/. 
  6. ↑ "About Lightbox ads". Google. https://support.google.com/google-ads/answer/6379520. 
  7. ↑ Andrews, Ben; Stapley, Jon (August 29, 2020). "The best light tents for photography". https://www.digitalcameraworld.com/buying-guides/best-light-tents-for-photography. 
  8. ↑ Elizabeth, Diana (December 3, 2013). "3 Great Ways to Utilize a Light Cube". https://photography.tutsplus.com/tutorials/3-great-ways-to-utilize-a-light-cube--photo-16886. 
  9. ↑ Bartosz Porebski; Karol Przystalski; Leszek Nowak (17 February 2011). Building PHP Applications with Symfony, CakePHP, and Zend Framework. John Wiley and Sons. pp. 259. ISBN 978-1-118-06792-5. https://books.google.com/books?id=gTEl2mWGNtAC&pg=PA259. 

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