1819: Wave optics - The book of science In 1819, Augustin-Jean Fresnel and François Arago teased out the properties of polarized light and explained how light waves vibrate.

In 1819, Augustin-Jean Fresnel and François Arago teased out the properties of polarized light and explained how light waves vibrate. #Poetry #Science #History #Electromagnetics #Fresnel #Arago sharpgiving.com/Sharp/theboo...

#Newton, #Principia
#Huygens, De Vi #Centrifuga
Huygens - #Fresnel: #Wavefront / #Wavelet #Theory
(∆𝒗/𝒗≈∆𝒔/𝒓)
(𝒂𝒄=𝐥𝐢𝐦 ∆𝒕→𝟎(∆𝒗/∆𝒕))
(𝒂𝒄=(𝒗/𝒓)⋅(𝒅𝒔/𝒅𝒕))
(𝒂𝒄=𝒗²/𝒓)
(𝑭𝒄=𝒎⋅𝒗²/𝒓)

FRICKE
K=m*(v²/r)
Die Ursache der #Gravitation und die Loesung des Raetsels der Materie

TODESCHINI
La #Psicobiofisica
F=ρ*V²/r

Abstract: Some attenuated total reflection (ATR) correction formalisms share the drawback that they can only be applied to materials with relatively low oscillator strength, as they rely on one or another form of the low absorption assumption. In this contribution, we present an iterative formalism that does not suffer from this limitation and can be applied not only to attenuated total reflection spectra but also to spectra acquired under internal reflection conditions at subcritical incidence angles. Its accuracy is primarily limited near the critical angle and Brewster’s angle. The formalism is based on the perpendicular component of the wavevector and Fresnel’s equations, and it is fully compatible with wave optics. Its application is straightforward, and a corresponding program is available via the Supplemental Material.

New from Applied Spectroscopy!
#Attenuated #Total and #Internal #Reflection #Correction Based on #Fresnel’s #Equation
Read more: https://doi.org/10.1177/00037028251352565
#SAS #Spectroscopy #ATR

Thomas Point Light’s Historic Fresnel Lens to Return to Annapolis after 40 Years Away | Chesapeake Bay Magazine People who love lighthouses know exactly what a Fresnel lens is: a brilliant invention of the 1820s, it’s a dazzling lighthouse lamp designed to shine much more brightly into the night than anything…

The 4th-order #Fresnel lens from the 1875 Thomas Point Shoal #Lighthouse in the #ChesapeakeBay, #Maryland, is to be reinstalled nearly 40 years after its removal. It was installed in 1899, after the original lens was damaged by ice floe strikes, and removed when the light was automated in 1986.

Rita #ritafizzy #mediumformat #rolleiflex #120rollfilm #kodakfilm #kodakportra400 #peacockchair #Emmanuelle #6x6 #squareformat #fresnel #tungstenlights #vintage #beauty

Joseph Smith as Augustin Fresnel

Joseph Smith as Augustin Fresnel

What a wonderful weekend of Augustin Fresnel performances! Happy 150th to Currituck Beach Lighthouse and thank you Northern Outer Banks and Corolla NC for your hospitality!!!

#lighthouses #150thAnniversary #lighthousehistory #lighthouselovers #maritimehistory #fresnel #currituck #corollanc

Joseph Smith at Currituck Beach Lighthouse

On this Thanksgiving day I'm feeling much gratitude being on my first Fresnel performance tour! Looking forward to this weekend's performances for Currituck Beach Lighthouse as part of its 150th celebration! Happy Thanksgiving & Keep Shining Your Lights!!!

#lighthouses #maritimehistory #fresnel

家族見守ったやさしい明かり　国産第1号の灯台レンズが見納め　隠岐：朝日新聞 1921（大正10）年に初点灯された、島根県隠岐の島町の西郷岬灯台。日本の灯台レンズとしては初めて国産でつくられた「4等フレネル式レンズ」が、100年以上に渡って海の守りを務めてきた。レンズとランプ…

The fourth-order #Fresnel lens at the 1921 Cape Saigo #Lighthouse in the #OkiIslands, #Japan, will soon be retired and replaced with an LED light. It was the first lens of its kind to be manufactured in Japan.

#灯台 #隠岐諸島 #日本

建塔至今121年！　馬祖東湧燈塔列國定古蹟 | 生活 | CTWANT 馬祖列島最北端的東湧燈塔，為東引島上著名地標，由清代海關總營造司哈爾定於1902年（清光緒28年）設計、1904年（清光緒30年）完工並點燈，為我國早期重要的沿海導航指標之一。這座具18世紀英國建築風...

The Ministry of Culture of #Taiwan has recently listed the 1904 Dongchong #Lighthouse in the #Matsu Islands a national historic site. One of the oldest major lighthouses in Taiwan, it was one of only two to host a first-order #Fresnel lens.

#台灣 #燈塔

Day 2 memories of myself & Monsieur Augustin Fresnel from last month's NJ Lighthouse Challenge Weekend! Such a joy to visit Tuckerton Seaport, Absecon and Cape May Lighthouses!

@uslhs.bsky.social

#lighthouses #njlighthouses #MaritimeHistory #lighthousehistory #NJHistory #lighthouselovers #fresnel

Yao with an ancient Agfa Clack on Kodak TMax 400 film #yaotsy #modelshoot #onoff #beauty #blackandwhite #vintagestyle #agfa #clack #kodakfilm #kodaktmax400 #fresnel

I like blue, but sometimes red just works better:)

With annieartnude aka neiznizhnist aka Leeya in my studio

#gels #godox #fresnel #artnude #color #hardlight #oscuro

Fresnel lens
The Way UP
Dedication
History

#lighthouse #florida #jupiter #bureauoflandmangement #DOI #fresnel

Bring a New Level of Practical Lighting Performance to Your Shoots With the Astera SolaBulb The SolaBulb is here! One of the leading brands in wireless LED lighting solutions, Astera, has reinvented practical lighting with the SolaBulb, its first wireless, zoomable, Bulb-style Fresnel. Built on the success of the Astera bulb family, the SolaBulb is an ultra-versatile lighting solution that offers an excellent option for filmmakers and production crews seeking innovative lighting solutions. Here's what you need to know about the SolaBulb and how it introduces new levels of performance and control in a discreet, compact form factor with 50W PAR-bulb-equivalent output and an industry-first 15°–50° zoom. * * * ### Offering Spot and Wide-Angle Beam Control An innovative single lightbulb-style practical light, the SolaBulb is a zoomable Fresnel that offers both spot and wide-angle beam control capabilities, suitable for use on small DIY projects or the largest sets in Hollywood productions. > “I really appreciate how versatile the SolaBulb is. Being able to adjust the beam angle from a tight spot to a wider wash gives me so much flexibility on set. It’s compact, easy to rig, and saves me from whipping out multiple fixtures.” — David Smith (Wicked, Snow White, Guardians of the Galaxy) The flexibility for on-set, location, live environment, or exhibition use comes from the SolaBulb’s optimization for maximum Lux output. The SolaBulb can integrate seamlessly into practicals, lanterns, and architectural fixtures while also serving as a controllable downlight. Plus, its beam can be further shaped with the included SolaSnoot accessory to help reduce spill and manage contrast without added weight. ### Titan RGBMA LED Engine At its core, the SolaBulb is Astera’s proven Titan RGBMA LED Engine, which enables filmmakers and production crews to deliver rich, saturated colors, accurate skin tones, and dynamic output. SolaBulb’s unique optical system also allows users to rotate the front barrel, smoothly adjusting the beam from a soft, atmospheric glow to crisp, defined accents. The built-in PAR20 Fresnel lens can further provide even light distribution and shadow quality that feels cinematic, while maintaining the convenient footprint of a PAR30-style bulb. The SolaBulb also offers a great range of control thanks to built-in LumenRadio CRMX and Bluetooth features, which ensure seamless integration with your industry-standard consoles. Users can also try out the AsteraApp as an option to monitor and adjust settings across multiple units. The SolaBulb also follows all your standard NYX Bulb setup procedures and is fully compatible with Astera’s available PowerStation, offering external display and portable battery capabilities. ### Renowned Color Science and Performance Finally, perhaps its greatest calling card, the SolaBulb really shines with its renowned color science and 96 TLCI. This innovation offers impressive energy efficiency, delivering 5,228 lux at 1 meter (3.3 ft) while drawing just 15 Watts. It also provides comfort and safety, thanks to its architectural design, ergonomic features, and IP44 rainproof protection. > "We believe that our attractive pricing can enable more users to utilize the luminaire in quantity, making a significant difference in unleashing the real potential of SolaBulb. Especially when combined with existing NYX Bulb and LunaBulb accessories, there’s no end to the creative possibilities for gaffers, designers, and technicians.” — Astera Head of Product Management, Ben Díaz. The SolaBulb made its official debut at IBC 2025 and is set to be one of the most exciting new lighting options on the market this year, thanks to its versatile attributes, spot and wide-angle beam control, and Astera’s superior color science. If you’d like to check the SolaBulb out yourself, you can find out more info on _Astera’s website here_.

www.youtube.com/watch?v=O16Z... #starcitizen #german #fresnel #lmg #youtube

Expand Your Lighting Control With This New Aputure Motorized Fresnel For current Aputure STORM XT52 owners, prospective owners, or future renters, Aputure has unveiled a new motorized CF16 Fresnel lens that aims to expand the control and capabilities of this lighting unit. The Aputure Motorized CF16 Fresnel will also come with two new accessories that allow for even more control, and the unit itself will enhance and smooth your lighting capabilities. Here’s everything you need to know about the just-announced Aputure Motorized CF16 Fresnel and how it will work with the STORM XT52. * * * ### The New Aputure Motorized CF16 Fresnel Designed as a 16-inch diameter lens that will be capable of intensifying the native output of the STORM XT52 by up to seven times, as well as offering the ability to smooth falloff from center to edge, this new Aputure Motorized CF16 Fresnel brings greater control and capabilities in a compact and lightweight form factor. Built around a motorized internal focusing system with a spot-flood range from 18° to 50°, this Fresnel can help control beam angle from the fixture’s lamp head or remotely via Sidus Link, Sidus Link Pro, or lighting control console via DMX. ### Features and Accessories The Motorized CF16 Fresnel will also include 8-leaf CF16 Barn Doors for additional shaping control, which can also hold a scrim, as well as two accessories, which Aputure has shared to be: * The CF16 Fresnel Manual Focus Cover allows users to disengage the motor and is required to use the CF16 in manual mode. The Manual Cover maintains the Fresnel’s IP65 weather rating and continues the electrical connection for the Fresnel’s cooling fans. * The CF16 Barn Doors Adapter allows users to directly mount the CF16 Barn Doors to the Aputure STORM XT52. The Motorized CF16 Fresnel is set to be available for $2,690 in kits, which include the CF16 Barn Doors and a Rolling Soft Case or Flight Case. You can find out more info on _Aputure’s website here_.

The latest episode of the US #Lighthouse Society's podcast features an interview with Dan Spinella on his work restoring #Fresnel lenses.

The man behind the restoration of the Cape Hatteras Lighthouse Fresnel lens | Island Free Press By Mary Ellen Riddle of the Outer Banks Voice It stands just under 10 feet and weighs 5,050 pounds and is the future crown jewel of the Cape Hatteras Lighthouse. The […]

A reproduction of the original 1853 first-order #Fresnel lens will soon be ready for installation at the Cape Hatteras #Lighthouse in #NorthCarolina.

🧵 1/2

#OuterBanks #OBX #maritime

Lighthouse Storm Damage Repairs Underway | U.S. Fish & Wildlife Service

Storm damage repairs have begun at the 1913 Kilauea Point #Lighthouse on #Kaua'i, #Hawai'i. "Repairs will include removal and cleaning of the #Fresnel lens, weatherproofing of the lantern room glass, restoration of the vent ball, and replacement of the service room wall vents."

Twin Lights Bus Tour - National Lighthouse Museum Bus Tour Includes: Transportation to Twin Lights Historical Lighthouse with [...]

The National #Lighthouse Museum in #StatenIsland, #NewYork, is offering a bus tour to the 1828 Twin Lights Lighthouse in Navesink, #NewJersey on Wednesday, October 8. The lighthouse, decommissioned in 1949, was the first in the US to host a #Fresnel lens.

#museumsky #MaritimeHistory

I do love a #fresnel lens. And yeah, a #lighthouse too.

The image is a vibrant, abstract close-up of a glass Fresnel lens, showcasing its unique optical properties.  The photograph highlights the distinct concentric grooves or steps characteristic of a Fresnel lens, which replace the curved surface of a traditional lens. These grooves cause light to refract and disperse, creating a striking prismatic effect.   

#BlueskyArtshow #Shiny
#SensoryArt #Colors

#Glass #Fresnel #Lens #Reflection #Refraction #ArtYear #OnlyBeautifulThings #PhotographersOfBluesky #PhotographersUnited #EastCoastKin #AltText

#bskyartshow #shiny
#photography

Periodically (but not often) the non-profit keepers of the local historic #PointCabrilloLighthouse open the light to public tours. Access is limited and any goers must be able to mount an internal ladder to reach the #Fresnel #lantern.

I attended six years ago.

千葉 銚子 犬吠埼灯台 地元中学生が巨大レンズ磨く作業体験｜NHK 首都圏のニュース 【NHK】千葉県銚子市の中学生が地元の海上保安部が管理する灯台を訪れ、海を照らす巨大なレンズを磨く作業を体験しました。 ２０日は夏休み中の銚子市の…

Local junior high students from the city of #Choshi, #Japan, have polished the first-order #Fresnel lens in the 1874 Inubōsaki #Lighthouse as part of a summer work program.

#灯台 #日本 #銚子市 #千葉県

The image displays a close-up, abstract view of a Fresnel lens. The lens is composed of multiple concentric rings and triangular prism-like segments, creating a complex pattern of light refraction and reflection. Vibrant colors, including reds, greens, blues, and oranges, are visible within the glass, suggesting the dispersion of light or reflections from the surroundings. The overall impression is one of intricate optical design and the interplay of light and glass.

Another view of a #FresnelLens

#AlphabetChallenge #WeekGforGlass

#Reflections #Fresnel #Lens #Lighthouse #LensCulture #ArtYear #OnlyBeautifulThings #PhotographersofBluesky #PhotographersUnited #EastCoastKin #AltText

The photo depicts a detailed close-up of a Fresnel lens, commonly found in lighthouses. The image prominently displays the stepped, concentric rings of the lens, characteristic of a Fresnel lens design, which allows for a large aperture and short focal length without the mass and volume of a conventional lens. The lens is made of highly polished glass reflecting and refracting light into a spectrum of colors, indicating its function in directing and intensifying light.

#AlphabetChallenge #WeekGforGlass
#Macro ??

#Fresnel #fresnalism #Glass #Lighthouses #Lighthouse #Photography #PhotographersOfBluesky #PhotographersUnited #MacroPhotography #ArtYear #OnlyBeautifulThings #EastCoastKin #AltText

🧭 En 1847 se instaló en la Torre de Hércules un aparato tipo #Fresnel, construido en París por la casa Letourmeau, para lograr un alcance de 25 km. Esta nueva luz podía funcionar con parafina o petróleo. En la actualidad, está pieza se encuentra en el #MUNCYTACoruña
www.elespanol.com/quincemil/cu...

Went to a construction site and got bored waiting for my friend to get off the phone. Drew a dog on a kitchen counter then tried to take some photos using my iphone, a fishbowl, bottle of whiskey and a shop light. #bored #photography #fresnel #sketch

The #fresnel is one of my favorite lightshapers.
Did you know for example you can go from very harsh to semi soft, Just by zooming the lens ?

A little bit of smoke shows you the magic 😉
And as you can see in the photos the Fresnel gives that awesome shine and sparkle.

Cont....

In 2022, a reproduction of the lighthouse's original #Fresnel lens was installed in the tower -- see the video 👇

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