Difference between revisions of "Lens array"
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A lens array with a lens width less than 1 millimeter is a [[microlens array]]. | A lens array with a lens width less than 1 millimeter is a [[microlens array]]. | ||
| + | Lens arrays can be found in infra-red motion detectors.<ref>https://www.youtube.com/embed/HroJyGDoXI8?t=23</ref> | ||
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| + | ==Optics== | ||
Each lens in the array has its own optical axis. However, when the array is viewed as a cohesive unit, the lenses form a shared main optical axis.<ref name="u455">{{cite web | title=Microstructure Lens Arrays | website=Laser Focus World | url=https://www.laserfocusworld.com/directory/finished-optics-coatings-components/lens-arrays/product/14303094/avantier-inc-microstructure-lens-arrays}}</ref> | Each lens in the array has its own optical axis. However, when the array is viewed as a cohesive unit, the lenses form a shared main optical axis.<ref name="u455">{{cite web | title=Microstructure Lens Arrays | website=Laser Focus World | url=https://www.laserfocusworld.com/directory/finished-optics-coatings-components/lens-arrays/product/14303094/avantier-inc-microstructure-lens-arrays}}</ref> | ||
The side with the roundings should generally face towards the source of the light. In a display, this means that the user's eye faces the flat side of the array. | The side with the roundings should generally face towards the source of the light. In a display, this means that the user's eye faces the flat side of the array. | ||
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==Manufacturing== | ==Manufacturing== | ||
Revision as of 17:32, 27 July 2024
A lens array is a collection of lenses arranged in a specific pattern or grid. It can be used in light field cameras and light field displays.
A lens array with a lens width less than 1 millimeter is a microlens array.
Lens arrays can be found in infra-red motion detectors.[1]
Optics
Each lens in the array has its own optical axis. However, when the array is viewed as a cohesive unit, the lenses form a shared main optical axis.[2]
The side with the roundings should generally face towards the source of the light. In a display, this means that the user's eye faces the flat side of the array.
Manufacturing
Lens arrays can be produced using microfabrication techniques, in particular photolithographic techniques.[3]
Lens arrays have been manufactured at the wafer level by Lytro.[4]
Lens arrays have been produced with a distance between lenses of about 125 microns, which is 1/8 of a millimeter.[5]
To make a plenoptic lens based display, each lens should be at the minimum 200 pixels wide and 200 pixels long.
Materials
- Glass
- PMMA
- Fused silica[6]
Uses
A lens array can be found in a light field camera.[7]
Unusual
It is possible to make a microlens array using fresnel lenses.[8]
It is theoretically possible to make a liquid lens array.
It is theoretically possible to make a lens array that has a general curve to it, like on a semisphere.
A lens array can potentially be made out of a holographic optical element.
References
- ↑ https://www.youtube.com/embed/HroJyGDoXI8?t=23
- ↑ "Microstructure Lens Arrays". https://www.laserfocusworld.com/directory/finished-optics-coatings-components/lens-arrays/product/14303094/avantier-inc-microstructure-lens-arrays.
- ↑ https://patentimages.storage.googleapis.com/ae/55/08/039fdcbd181cb7/US20130033636A1.pdf
- ↑ "Karafin Lytro". https://www.youtube.com/watch?v=6nYXVT0QUkc.
- ↑ "Plenoptic Cameras: The Future of Imaging". https://www.youtube.com/watch?v=nyRgcD4VxE8.
- ↑ "Fused Silica Microlens Arrays". https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=2861.
- ↑ "Lytro Specifications: A Deeper Look Inside". http://lightfield-forum.com/2012/11/lytro-specifications-a-deeper-look-inside/.
- ↑ https://holographix.com/wp-content/uploads/2019/01/MLA-Circles-Microlens-Arrays-2-e1548578651299.jpg
