Collimating image from an LCD display

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SUMMARY

The discussion focuses on the challenges of collimating an image from an LCD display for use in a heads-up display (HUD). Participants explore the use of a 4.5 cm focal length lens from an Oculus Rift DK2 and various methods to achieve collimation, including replacing the display's backlight with a collimated light source. Key issues include achieving sharp focus, managing chromatic aberration, and the effectiveness of Fresnel lenses. The conversation also touches on DIY HUD setups and the importance of precise optical alignment for successful collimation.

PREREQUISITES
  • Understanding of optical principles, specifically collimation and focal lengths.
  • Familiarity with LCD display technology and its components.
  • Knowledge of lens types, including convex and Fresnel lenses.
  • Experience with DIY electronics and assembly techniques for optical devices.
NEXT STEPS
  • Research "collimated light sources for LCD displays" to explore alternatives to backlighting.
  • Learn about "Fresnel lens design and applications" to optimize collimation techniques.
  • Investigate "chromatic aberration in optical systems" to understand its impact on image quality.
  • Explore "DIY HUD projects" for practical insights and design inspiration.
USEFUL FOR

Optical engineers, hobbyists building DIY HUDs, and anyone interested in enhancing display technologies through collimation techniques.

  • #31
Hello Anorlunda,
I took a look at the 'Spyglass' Android app. Looks interesting in it's own right. Not quite what I'm looking at, but interesting never the less.
 
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  • #32
PaulCarew said:
The use case is actually for tracking sailboats in a sailboat race. Each of the racers will be carrying a small gps tracker that relays their position amongst other info. This is relayed and processed and then basic facts relayed to the binocular HUD/AR device. The device includes a gyro and compass for binocular orientation.
Why not just use hull numbers or names (I'm not sure how sailboats are labeled -- whatever is equivalent to tail numbers for aircraft)? How do you plan to handle sailboats that are side-by-side and so in the same line of sight from your location?

PaulCarew said:
Working on a physical binocular attachment at the moment that includes the lens system. This bit is the *most* challenging :-)
Are you able to open up the binoculars to add your optics inside, or are you trying to do this all external to the binocs? If all external, maybe use something like Google Glass or similar HUD glasses, rather than trying to add something to the front entrance of the binocs?
 

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