Difference between revisions of "Lens array"
(Created page with "A '''microlens array''' is an optical device that has lots of tiny lenses. It can be used to make a light field display. Thorlabs advertises the sale of microlens arrays...") |
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| − | A ''' | + | [[File:Microlens Array.jpg|thumb|200px|A lens array in a hexagon pattern]] |
| + | A '''lens array''' is a component of a display that can help to generate a [[light field]]. It consists of [[lens]]es arranged in a pattern or grid. It is a component of [[light field camera]]s and some types of [[light field display]]s. | ||
| − | + | Lens arrays translate between angle of light and position of light. | |
| − | + | A lens array is a [[microlens array]] if its lenses are less than 1 millimeter wide. | |
| + | |||
| + | Lens arrays can be found in infra-red motion detectors.<ref>https://www.youtube.com/embed/HroJyGDoXI8?t=23</ref> | ||
| + | |||
| + | A lens array used in integral imaging must have a viewcone size significantly smaller than a human retina in order to solve the [[vergence-accommodation conflict]]. If the viewcone size is more than the width of the retina, the display will only show parallax, and no correct focal cues. | ||
| + | |||
| + | It may be sold as a "hexagonal lens array".<ref name="s392">{{cite web | title=Hexagonal Lens Array (large) | website=Luximprint | date=2023-10-05 | url=https://www.luximprint.com/product/hexagonal-lens-array-large/ | access-date=2024-09-15}}</ref> | ||
| + | __NOTOC__ | ||
| + | ==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> | ||
| + | |||
| + | 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 injection molded. | ||
| + | |||
| + | A lens array can be made from a silicone mold made with 1 mm stainless steel balls. The lens material can be epoxy resin.<ref name="i170">{{cite web | title=Getting A Fly’s-Eye View With Microfabricated Lens Arrays (Comments section)| website=Hackaday | date=2021-09-07 | url=https://hackaday.com/2021/09/07/getting-a-flys-eye-view-with-microfabricated-lens-arrays/ | access-date=2024-09-13}}</ref> | ||
| + | |||
| + | ===Materials=== | ||
| + | * Glass | ||
| + | * PMMA | ||
| + | * [[Fused silica]]<ref name="x001">{{cite web | title=Fused Silica Microlens Arrays | website=Thorlabs, Inc. | url=https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=2861}}</ref> | ||
| + | |||
| + | ==Uses== | ||
| + | Lens array can be found in [[light field camera]]s.<ref name="w180">{{cite web | title=Lytro Specifications: A Deeper Look Inside | website=LightField Forum | url=http://lightfield-forum.com/2012/11/lytro-specifications-a-deeper-look-inside/ | access-date=2024-07-09}}</ref> | ||
| + | |||
| + | To make a plenoptic lens based display, each lens should be at the minimum 200 pixels wide and 200 pixels long. | ||
| + | |||
| + | ==Novel== | ||
| + | It is possible to make a microlens array using [[fresnel lens]]es.<ref>https://holographix.com/wp-content/uploads/2019/01/MLA-Circles-Microlens-Arrays-2-e1548578651299.jpg</ref> | ||
| + | |||
| + | It is theoretically possible to make a liquid lens array, for example using water droplets. | ||
| + | |||
| + | 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]]. | ||
| + | |||
| + | It is possible to make a [[metalens array]]. | ||
==References== | ==References== | ||
<references /> | <references /> | ||
| + | |||
| + | [[Category:Optical components]] | ||
| + | [[Category:Light field]] | ||
| + | [[Category:Light field display]] | ||
Latest revision as of 05:45, 17 February 2025
A lens array is a component of a display that can help to generate a light field. It consists of lenses arranged in a pattern or grid. It is a component of light field cameras and some types of light field displays.
Lens arrays translate between angle of light and position of light.
A lens array is a microlens array if its lenses are less than 1 millimeter wide.
Lens arrays can be found in infra-red motion detectors.[1]
A lens array used in integral imaging must have a viewcone size significantly smaller than a human retina in order to solve the vergence-accommodation conflict. If the viewcone size is more than the width of the retina, the display will only show parallax, and no correct focal cues.
It may be sold as a "hexagonal lens array".[2]
Optics[edit]
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.[3]
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[edit]
Lens arrays can be injection molded.
A lens array can be made from a silicone mold made with 1 mm stainless steel balls. The lens material can be epoxy resin.[4]
Materials[edit]
- Glass
- PMMA
- Fused silica[5]
Uses[edit]
Lens array can be found in light field cameras.[6]
To make a plenoptic lens based display, each lens should be at the minimum 200 pixels wide and 200 pixels long.
Novel[edit]
It is possible to make a microlens array using fresnel lenses.[7]
It is theoretically possible to make a liquid lens array, for example using water droplets.
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.
It is possible to make a metalens array.
References[edit]
- ↑ https://www.youtube.com/embed/HroJyGDoXI8?t=23
- ↑ "Hexagonal Lens Array (large)". 2023-10-05. https://www.luximprint.com/product/hexagonal-lens-array-large/.
- ↑ "Microstructure Lens Arrays". https://www.laserfocusworld.com/directory/finished-optics-coatings-components/lens-arrays/product/14303094/avantier-inc-microstructure-lens-arrays.
- ↑ "Getting A Fly’s-Eye View With Microfabricated Lens Arrays (Comments section)". 2021-09-07. https://hackaday.com/2021/09/07/getting-a-flys-eye-view-with-microfabricated-lens-arrays/.
- ↑ "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
