The Future of Metalens For Video Surveillance Cameras - MIT / UMass / Immervision

By Zach Segal, Published on Sep 25, 2020

Panoramic cameras using 'fisheye' lens have become commonplace in video surveillance over the past decade. Now, researchers are working on 'metalenses' that aim to be thinner and less expensive.

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This gained mainstream attention recently when MIT announced 'a fisheye lens that’s completely flat'.

We spoke with the MIT scientists about this as well as Immervision, a major current panoramic lens provider, and Jacob Engleberg, a researcher at Hebrew University working on metalenses to better understand the potential for this technology.

Executive *******

*** ***/***** **** **** a **** ** *********** lens (***** ***** ** controlled ******* ********* **** obstacles ******* ** *** curving ******* ***** ** plastic) **** ** ******* than * **********, ****** a ********. ********** ********* only **** **** ** a ****** **** ** color, ** ** ** unlikely ** **** * broad ****** ** *** surveillance ******** *** *** time *****, ** **** because ******** ****** ******* all ****** ** ******* light ********. ******* **** may **** ***** ****, such ** ** ****** illuminated ** * ****** type ** *** ** depth ********** *** **** phones.

Flat ******* ****

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* **** **** *** and ******** ******* * **** lens **** * ~ 180° ***. *** ****, Juejun **, ******* **********, Fan ****, ***** **, Dominika *****, ******** *******, Tian **, ******* **, and ******** *****, *** partially ****** ************'* ******* ************ ***** ** ****** innovations ** ****** ***** Engineered ******* ********* ** EnMats. **** **** ********, man-made ******** **** *** thinner **** ***** *********** (or ***-**********), ** ****** the ****. *** **** is **** *** ***-*****, unlike *******-******, ***** *** multipiece *** ************* *****, advantageous ***** **** ** a **********, **** ***********, and ********* ** **** expensive **** *********** ****-*** lenses. *** **** **** created ***** ** ******-**** IR ***********, ******** *** use. *** **** ********** to **** **** ***** technique *** ************* ** any ******-**** **********, ********* visible *****, *** ********* increasing *** ****** ** light ******* ****** * single ****/***** ***** ***** issues:

** ******* ***** ** a *****-*** ** ******** efficiency (*** **** ***** is ******** ** **** an *****) *** *** spectral *********. * ********** explanation ** **** *** efficiency *** ************* ** close ** ***** ** optimizing ********** *** *** single **********; ******* *** design **** ******* **** this ***** ***** ** wavelength *******, *** ********* the ********** *******.

***** ***** ***** ********* their ********:

Metalens *** ********** ******* *********

********** *** * **** type** **** **** **** nanostructures ** ********/****** ***** instead ** *********** ****** that *** ***** *** use **********/******* ** *****. They *** ***-**********, ***** means **** *** ******* than *** ***** ** light **** *** ********* for, light** */*,***,***** ** * millimeter ***** *****. **** are * **** ** diffractive ****, ** **** that ***** ***** ******* diffraction/collisions ** ***** **** obstacles. *********** ****** *** refraction, ** *** ******* of ***** ** ** moves ******* ********* *********, instead.

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********************** ****** *** ******* than**********, ***, ******* **** are ****** ** ** mm ***** (***,**** *** thickness ** ******) *********, the ********** ** ********.*********** *********** ********* *** *** ***** travels ** ****** ***** desired ****** ***** ******** use ************* ******** ****** nanoantennas ** ****** *****. Traditional *********** ****** **** been ******** **** *********** and *** **** ****** technology.

Metalens ******* *** *******

******** ***** ** **** for **** ********* *** thinner ******* ******. *********** lens ************ ***********, **** IPVM **** *** ******* potential ********* ** ********** for ************ **** ** price. **** ** ****** by *** ********* *** inexpensive *************, ******* **** size, *** ****** **** fewer **********. ********* **** metalenses *** ** **** utilizing *** **** ********** as ***** *** **** low *** ******** *****, so **** ***** ** mass-produced *** **** **** traditional ******.********** *** **** *********** ** ****** ********* properties ******* ********** ********* or ****** **** **********. This ** ******* ***** interacts **** ********** ********** that *** ***** ** the ****, ** *** structures *** ** ******** for *** **** ******* adding ***** ****** ** thickness. ********** ******, *******, work ** ***** ***** through ****, ** **** need ** ****** ******* or **** **** ********** to ****** ******** *** increase **********. *********** **** IPVM **** ***** ********** and ****** **** **** are ***** ******* ****** the **** ** ****** so **** ***** ********** should **** ** ******** being **** ********* **** alternatives.****, *** **** **** like **********, *** ******* size ** ******** ** a ***** *********.*** ***/***** ************ **** ******** ********** could ***** ****-******* ****** or ****** ***** ******* to ** ***** **** smartphones.

Metalens ****** ******* ** ****** ***********

******** ********* ** *** work *********** ** **** ****** and ******** **********. **** suffer **** ********* ********** or **** *********** ** light ******* ** * specific **********. ******** ********** Jacob ********* ** ****** University **** **** **** metalens *** **** ****** well **** **** *****, ~1/10th *** ******** ** visible ***** *** ******* best ** **** ******** bands.

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*** ***/***** **** **** IPVM **** ********** *** spectrum **** ******** **** on *** * ******* penalty:

***** ** * *********** (in ********** **********) ******* which *** *** ** acceptable ** *** ************.

********* **** **** **** this ***** ** *** range ** ***** * metalens ***** **** ** extended, **** ***** ** correctly ******** *** **** light ** *********** ******** which ******* ***** ******* adding * ***** ********** and ****** ** *****. The ***/***** **** **** IPVM **** **** ******** that * ****-******* ***** metalens ***** **** **% efficiency, ** **% ** the ***** ***** ****** not ** ******** ** be *********** ******** *** degrade *** *****.

Experts ******** ** ******* ** ********

******* ******** ** ******* metalens ***** **** ****-******* applications, ** *********** ** niche ***-*****, ** *** worse **** *********** *********** lenses.

*** ***/***** **** ************* ** * *** of ********* *** ********. They **** **** **** are ********* *********** ********* their ********* ** ******-**** visible ***** *** *** exploring **** ***** ******-******** is ****:

** ** *****, ** are ******** ******** ** narrow-band ****-** ** ******* metalenses ***** *** ****** for ******** ******* **** as ***** ******* ** smartphones ** ***** ********** (which ******** ***** ****** RGB *** *** ********* light). ****** ** *** identify * ********** *********** for ********* ****** (*** which *** ***** ********** is *** ** *****), we *** *** ************ broadband ************ ** **** point.

*********** **** **** **** believe ******** ******* **** be ************ ********* ** the **** **** *****. They **** **** *** technology, **** *** ******** shift **** ***** ** plastic ******, **** ****** gradually *** ****** **** many ******. *********** ******** the *********** **** ***** as **** ** ***** from **** ************* ****** to ****** **** ********** (because ** *** ************ in ************* *********) **** ensure *** ********** ********.

* **** **** *** University ****** ***** * ************ *** *** **** traditional *********** ****** **** work ** *** **** narrow-bands ** ***** ** a ******** *** **** better ***** *******. **** designed *********** *********** ******, which *** ********* **** expensive ** ******* **** metalens, **** ************ ******* types ** ******** ** image ******* **** ******** uses:

****, ** **** **** multi-level *********** ****** (****), when ******** ******** *** exceed *** *********** ** metalenses

********* *** ********* ********* ** ******* ** response, ***********,*** ********* *** **** bullish **** *** ***/***** team ** ***********. ********* and ********* **** ***** that ******** **** ********** over *********** *********** ****** in **** ***** *** may **** **** **** for *********** ******* ** their ******** ******* *** increased ***************:

********** **** ******* ************ CDLs ** **** ******** (for *******, ****-********** ****-** applications7,9). ********** **** **** degrees ** ******* **** CDLs, ** ***** ************** come ** ********* *****.

*** ***** **** *** not ***** ******** ***** replace ***** *********** ****** but ***** ** **************:

** ******* **** ********** metalenses **** **** ** into ********, **** *** appropriate *********** ***** ********** manufacturing **********. *******, ** do *** ***** **** will ******* *********** ******, since *** **** ************ CDLs *** ********** *** more **** *********.

********* **** **** **** that ***** ** ******** metalens ********** ** ********* ready *** ******-********* ****, such ** ****** *********** by *** **** ** IR ***, ** **** not ******* ******** *** achieve *** ******* ** refractive ****** ****** *** visible ***** ********:

** *** ******* *** type ** *********** **** will ***** **** (** comparable **** ********** ****) imaging **** *** **** spectrum ** ******* ***** in *** **** ******.

** ********, ******* *** issue *** **** ******** performance **** ******** *********** suffered **** *** ******* but **** **** ***** change ** *** ******:

******** ****** **** ******* chromatic ********** ******* ** quasi-mono-chromatic ****. ********** ********** to **** *** ******* low ******* *****, ** they *** *** ********* for ************ *******, *** this ** **** ** progress, ** ** **** wait *** *** **** new ************ ******.

*******

**** ** ** ********** achievement *** ** *** and *****, *** ** will ****** *** **** an ****** ** **** surveillance ***-***** *** * while, ** ****. ********** lenses *** *** ************* expensive *** ********** ********** continues ** ******. ** addition, ** ** ******* if ********** **** **** be **** ** ******* the ****-******* *****-******** ******** needed *** **** ************ use. *******, **** ***** become ************ ********* *** use-cases ***** * ****** band ** ******** ** acceptable.

Vote / ****

Comments (3)

**** ***********! * **** into *** ******...

****, ***** *** *** bringing **** *** **** out! **** ** ********** interesting *** ***** **** a *********, ****** * bit *******.

***** **** - ***** you *** **** *******!

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