Canon Synthetic Fluorite Crystals
How fluorite lenses are made | Canon Optron, Inc.
The purified raw fluorite fragments are put into a crucible and melted. The crucible is moved towards the bottom of the setup so that crystallization occurs starting from the bottom. Recrystallizing the raw crystals removes impurities, creating …
Technology | Canon U.S.A., Inc.
In 1968, two years after the launch of the F Program, Canon researchers successfully produced a synthetic fluorite crystal. But numerous hurdles remained before fluorite could be used in a camera lens.
Technology | Canon U.S.A., Inc.
Fluorite had been a focus of attention for centuries. In the 1800s, natural calcium fluoride crystals were already being used as objective lenses in microscopes. Later, attempts were made to produce synthetic fluorite crystals for use as lenses in larger instruments such as telpes.
Canon : Optron donates artificially crystallized fluorite, …
The museum, in recognition of synthetic fluorite's more 50-year legacy of contribution to photography, has requested that Canon Optron manufacture one of these crystals for display as part of the museum collection.
Fluorite vs ED
Optron (Canon-Optron) is the company largely credited for being the first to successfully grow Fluorite crystals in large batches in support of Canon's burgeoning high-end SLR lens business. ... (SD) glass being referred to as synthetic Fluorite or "FD glass" directly by any professionals in the glass business nor in optical fabrication. In ...
Fluorite manufacturing
Synthetic fluorite manufactured by Canon Optron Co., Ltd. is made from natural fluorite and is synthesized by a crystal pull-down method.
Fluorite vs ED
When ED optical glass is melted, the key ingredient is synthetic Fluorite. The "F" in FPLXX stands for Fluorite. But its definitely a glass and not a crystal so its not commonly (nor correctly) referred to as "synthetic Fluorite". …
Impurities in synthetic fluorite for deep ultraviolet optical
The impurity content of synthetic calciumdifluoride (fluorite, CaF 2 ) single crystals produced for optical applications in the deep ultraviolet (DUV) and infrared (IR) spectral regions are investigated by luminescence and absorption spectroscopy.Lead, oxygen, and rare earth (RE) ions, namely, trivalent ( Ce 3 + , Pr 3 + , Sm 3 + , Eu 3 + , Gd 3 + , Tb 3 + , Dy 3 ...
The evolution of Canon's white lenses
Canon's super telephoto lenses are instantly recognisable thanks to their iconic white coating, but why is it white? Discover the story behind Canon's white lens paint.
Fluorite vs ED
This is what is properly called synthetic fluorite. The term, correctly used does not refer to any glass, melt, or amalgum. ... the crystals can better be grown under controlled laboratory conditions to produce large, clear, ... The big white telephotos with fluorite gave Canon a big advantage for sports/wildlife photography for a time period ...
Optical Crystals | Canon Optron, Inc.
Fluoride crystal, typically exemplified by fluorite, has to be grown in a vacuum ambient atmosphere with a high temperature of 1,000°C or higher, requiring advanced devices as well …
Camera Lenses
However, because natural fluorite is too small to be used for photographic lenses, Canon began to make larger artificially crystallized synthetic fluorite (fluoride) crystals in their laboratories. The artificial fluoride crystal production method for Canon lenses is outlined in patents claimed by Canon Inc.
Fluorite manufacturing
Page 1 of 2 - Fluorite manufacturing - posted in Refractors : Hello, I thought Id post this since its of interest to refractor-philes. This is a couple of blog posts by Ted Ishikawa as he visited the Canon Optron plant which manufactures fluorite lenses: Whats interesting (to me anyway) is the raw fluorite sample presented to Ted which hell be displaying at NEAF. I wont …
Fluorite lenses: Corrective capabilities beyond the …
Canon, in its pursuit of progress in imaging capabilities, was keen on utilizing fluorite in its photography lenses, set out to develop its own technology for forming large, high-purity artificial fluorite crystals using fluorite ore as a raw …
What is a fluorite lens element? Photography terms …
To overcome these problems, Canon set about growing its own synthetic fluorite crystals, and in large enough quantities to create photographic lenses from them. The next hurdle was to grind …
Canon celebrates 50th anniversary of lens …
TOKYO, November 7, 2019—Canon Inc. and Canon Optron, Inc. announced today that this year marks the 50th anniversary of the release of the world's first lens for interchangeable-lens cameras targeting ordinary consumers to …
Fluorite, aspherical, UD and BR lenses
Canon grows its own synthetic fluorite crystals and developed techniques for grinding the fragile substance into flawless lens elements. ... The first Canon lens to contain a fluorite element was the FL-F 300mm f/5.6, produced in 1969. Spherical lenses are the easiest lens shape to make, but they disperse the rays of light passing through them ...
Canon Lenses
To use these natural crystals for relatively large camera lenses was not feasible and so Canon set about growing its own synthetic fluorite crystals in large enough quantities to create photographic lenses from them. Florite is fragile and will break easily so this presented many challenges.
Fluorite Lens Definition
Canon's engineers found a way around this issue, by synthetically growing fluorite crystals in a laboratories. Even then, it is still a very complex job to turn Fluorite in to a lens product. For this reason, Fluorite lens elements are only found in the very best Canon lenses, such as the EF 100-400mm F4-5.6 L USM II.
Canon Optron donates artificially crystallized …
38 rowsTOKYO, July 2, 2020—Canon Inc. announced today that its …
Cation diffusion in fluorite single crystals
Semantic Scholar extracted view of "Cation diffusion in fluorite single crystals" by M. Baker et al. ... The spin—lattice relaxation time T1 of 19F was measured over a temperature range of 77° to 1300°K in natural and synthetic CaF2 crystals and in CaF2 crystals doped with 0.05% Sm, 0.16% Sm, and 1.20% … Expand. 22.
Fluorite, aspherical, UD and BR lenses
Read about advanced tech in Canon lenses to reduce aberrations and improve image quality, including fluorite, aspherical, BR and UD (ultra-low dispersion) lenses.
Fluorite, Aspherical, UD and BR Lenses
Canon grows its own synthetic fluorite crystals and developed techniques for grinding the fragile substance into flawless lens elements. ... The first Canon lens to contain a fluorite element was the FL-F 300mm f/5.6, produced in 1969. Spherical lenses are the easiest lens shape to make, but they disperse the rays of light passing through them ...
The evolution of Canon's white lenses
The only catch is that natural fluorite crystals, because of their small size and impurities, do not meet all the requirements for a camera lens. In the 1960s, Canon pioneered synthetic fluorite lens elements, and became the only manufacturer to incorporate …
The World of L-series Lenses Technology
Fluorite had been a focus of attention for centuries. In the 1800s, natural calcium fluoride crystals were already being used as objective lenses in microscopes. Later, attempts were made to produce synthetic fluorite crystals for use as lenses in larger instruments such as telpes.
[PDF] Impurities in synthetic fluorite for deep ultraviolet …
The impurity content of synthetic calciumdifluoride (fluorite, CaF2) single crystals produced for optical applications in the deep ultraviolet (DUV) and infrared (IR) spectral regions are investigated by luminescence and absorption spectroscopy. Lead, oxygen, and rare earth (RE) ions, namely, trivalent (Ce3+, Pr3+, Sm3+, Eu3+, Gd3+, Tb3+, Dy3+, Ho3+, Er3+, and …
Canon DSLR Lens Buying Guide | B&H eXplora
In order to reduce the cost factor, Canon's optical engineers developed cost-effective synthetic Fluorite crystals that could maintain equal measures of chromatic aberration control and faithful color characteristics, traits that made natural Fluorite desirable in the first place.
Uses of fluorite crystals | Canon Optron, Inc.
These lenses, made from synthetically crystalized fluorite, were the product of 5 years' of no-effort-spared development and production by Canon Optron. The Smithsonian Astrophysical Observatory incorporated these lenses into …
Uses of fluorite crystals | Canon Optron, Inc.
In July 2006, Canon Optron delivered 12 fluorite lenses of various sizes, including one nearly 40cm in diameter, to the Smithsonian Astrophysical Observatory in the United States. These lenses, made from synthetically crystalized fluorite, were the product of 5 years' of no-effort-spared development and production by Canon Optron.
Optical Crystals | Canon Optron, Inc.
Fluoride crystal, typically exemplified by fluorite, has to be grown in a vacuum ambient atmosphere with a high temperature of 1,000°C or higher, requiring advanced devices as well as high-level processing technology. Canon Optron succeeded in mass production of fluorite in 1968. ... Canon Optron, Inc. Optical Crystals ...
The history of fluorite lenses | Canon Optron, Inc.
In 1968, Canon Optron became the first in the world to successfully mass manufacture synthetic fluorite. The following year, Canon released the FL-F300mm F5.6, its first interchangeable …
Exploring The Fluorspar Cabin
Canon Inc. actually grows their own synthetic fluorite crystals for their high-end telephoto lenses and Nikon also offers fluorite lenses and fluorite coated lenses. A less impressive but important use of fluorite is in cement mix, which is what this mine mostly produced it for. The cabin has definitely seen better days, but is holding up well.
Canon celebrates 50th anniversary of lens employing synthetic fluorite
Canon Australia and Canon Optron, Inc. announced today that this year marks the 50th anniversary of the release of the world's first lens for interchangeable-lens cameras targeting ordinary consumers to employ synthetic fluorite: the FL-F300mm f/5.6 (released in May 1969).
Fluorite, Aspherical, UD and BR Lenses
Read about advanced tech in Canon lenses to reduce aberrations and improve image quality, including fluorite, aspherical, BR and UD (ultra-low dispersion) lenses.
Artificial Fluorite
This paper presents a condensed history of the research on artificial optical fluorite growth which was begun in the middle 1920's and reduced to practice under N.D.R.C. Contract OEMsr-45 with the Massachusetts Institute of Technology during 1940-45.Fluorite castings were produced eventually by freezing purified molten CaF2, contained in chemically clean graphite crucibles, …