These iris diaphragms provide adjustable optical apertures from 1.0 mm to as large as 41.3 mm for a variety of common optics applications such as optical beam alignment and attenuation. All three iris sizes available have at least 10 spring-steel leaves to provide a continuous and circular diaphragm opening and can be mounted to optical posts and pedestals.

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Cartier’s other famous timepieces include the Tank watch, which was inspired by the linear form of military tanks during World War I, and the so-called mystery clocks. Invented by watchmaker and magician Jean-Eugène Robert-Houdin and later crafted exclusively for Cartier in the house’s workshop by watchmaker Maurice Couët, the mystery clocks were so named because the integration of glass dials on which the clocks’ hands would seemingly float as well as structures that are hidden away within the base give the illusion that they operate without machinery.

On the jewelry side of the business, Cartier’s internationally renowned offerings include the Tutti Frutti collection, which featured colorful carved gemstones inspired by Jacques’s trip to India and grew in popularity during the Art Deco years; the panthère motif, which has been incorporated into everything from brooches to rings; and the Love bracelet, a minimal, modernist locking bangle inspired by medieval chastity belts that transformed fine jewelry.

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Perhaps 1847 was not the ideal time to open a new watchmaking and jewelry business, as the French Revolution was not kind to the aristocracy who could afford such luxuries. Nevertheless, it was the year Louis-François Cartier (1819–1904) — who was born into poverty — founded his eponymous empire, assuming control of the workshop of watchmaker Adolphe Picard, under whom he had previously been employed as an assistant. Of course, in the beginning, it was a relatively modest affair, but by the late 1850s, Cartier had its first royal client, Princess Mathilde Bonaparte, niece of Napoleon Bonaparte, who commissioned the jeweler to design brooches, earrings and other accessories.

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These iris diaphragms provide adjustable optical apertures from 1.0 mm to as large as 41.3 mm for a variety of common optics applications such as optical beam alignment and attenuation. All three iris sizes available have at least 10 spring-steel leaves to provide a continuous and circular diaphragm opening and can be mounted to optical posts and pedestals.

One of Cartier’s earliest major successes was the Santos de Cartier watch — one of the world's first modern wristwatches for men. (Previously, a large number of people were using only pocket watches.) Louis designed the timepiece in 1904 for his friend, popular Brazilian aviator Alberto Santos-Dumont, who wanted to be able to check the time more easily while flying.

Iris Diaphragms provide continuously variable apertures for a multitude of optical applications, such as beam alignment, light attenuation, or as baffles to block spurious reflections and scattered light. Three models are available with aperture size ranges of 1.0 mm to 11 mm, 1.5 mm to 25 mm, and 2.4 mm to 41.3 mm. Model ID-1.0 and ID-1.5 Irises mount directly to optical posts and pillars with an 8-32 threaded hole or M4 threaded hole for metric versions. The miniature ID-0.5 Iris mounts to posts, such as SP series posts, with the MH-2P Optic Holders.

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Cartier’s golden years, however, began when Alfred introduced his three sons, Louis, Pierre and Jacques, to the business. The brothers expanded Cartier globally: Louis reigned in Paris, Pierre in New York and Jacques in London, ensuring their brand’s consistency at their branches across the world. The trio also brought in such talents as Charles Jacqueau and Jeanne Toussaint.

For smooth adjustment and an optimal shape for the aperture opening, each iris consists of an array of curved, overlapping, spring-steel leaves that intersect into the circular opening. Up to 18 leaves adjust continuously between two supporting rings with the adjustment of a pin handle attached to the inner ring.

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For its extraordinary range of bracelets, watches, rings and other adornments, French luxury house Cartier is undeniably one of the most well known and internationally revered jewelers in the world among clients both existing and aspirational.

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While the Cartier family sold the business following the death of Pierre in 1964, the brand continues to innovate today, renewing old hits and creating new masterpieces.

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This iconic jewel has captured countless hearts with its elegant design and its amatory symbolism. Counterfeiters have taken note of the demand and created fake versions. If you’re looking for a genuine Cartier Love bracelet, it’s crucial to check all the elements for authenticity. Our guide will teach you the telltale traits of a knockoff.

Iris Diaphragms provide continuously variable apertures for a multitude of optical applications, such as beam alignment, light attenuation, or as baffles to block spurious reflections and scattered light. Three models are available with aperture size ranges of 1.0 mm to 11 mm, 1.5 mm to 25 mm, and 2.4 mm to 41.3 mm. Model ID-1.0 and ID-1.5 Irises mount directly to optical posts and pillars with an 8-32 threaded hole or M4 threaded hole for metric versions. The miniature ID-0.5 Iris mounts to posts, such as SP series posts, with the MH-2P Optic Holders.

Under the leadership of Louis-François’s son, Alfred, who took over in 1874, business boomed. Royalty around the world wore Cartier pieces, including Tsar Nicholas II of Russia, the Maharaja of Patiala and King Edward VII, who had 27 tiaras made by the jewelry house for his coronation in 1902 and issued Cartier a royal warrant in 1904. (Today, the British royal family still dons Cartier pieces; Kate Middleton, Duchess of Cambridge, regularly sports a Ballon Bleu de Cartier watch.)