asphericlenses中文

The THYPOCH Simera 50mm f/1.4 aspherical lenses caters to vintage lens lovers. In terms of usability, the lens is compatible with Z, E, X, and RF Mounts. It has a design that takes you back to the days of analog photography, with the modern infinity lock: a crescent-shaped focus tab and depth-of-field indicator. Users can also enjoy a clicked aperture ring and a modern de-clicked one as well.

A Gaussian beam does not have a sharp edge. It is brightest at the center and fades away as you get farther from the beam axis. So the intensity isn't $0$ outside the beam radius.

I am modeling a laser beam from a laser scanning device as a Gaussian beam. I am not sure how to decide the waist radius $w_0$. For example, it is given that laser beam footprint at exit is $5$ mm and the divergence is reported to be 0.5 mrad. Wavelength is 1500 nm.

It has a Silent Wave Motor, allowing autofocus to do its thing in complete silence while achieving maximum precision. It’s compact but extremely powerful, with an HRI lens and internal focusing that keeps every photograph frozen in high quality.

This SIGMA 24-70mm lens is a zoom lens that has three aspherical lenses, which come together to deliver superior optical performance. With this DG DN Art lens, it’s more than possible – what with its six FLD and two SLD glass elements that attempt to erase any aberration from existence.

The Olympus ORBEYE is the worlds only 4K 3D Orbital Camera System and the next evolution of surgical imaging.

Yep. For newbies, using aspherical lenses can be a great way to reduce the learning curve of dealing with optical distortions and post-processing.

It’s a compact prime lens that boasts a focus ring that allows for easy and quiet adjustments across the entire range. Leica combines elegance and comfort in this lens, made possible by its refined optical tech, nine lenses in six groups, and an integrated round hood.

This makes it hard to describe the beam diameter. The way it is done is to pick the diameter where the intensity has dropped by a factor is $1/e^2$.

This Leica lens, the 28mm f/2 Summicron-M 28 lens, has a minimum focusing distance of 40 centimeters. It is a wide-angle aspherical camera lens, it’s a highly capable lens thanks to its dual-curve mechanism that is rarely seen elsewhere, crafted and planned carefully by Leica’s masterful engineers.

Near the beam waist, rays follow hyperbolic paths. Far from the beam waist, the hyperbolic beam approximates a cone. The divergence angle is the angle of the vertex of the cone. See the RP Photonics Encyclopedia article Gaussian Beams for more. It has a beam calculator.

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This wide-angle lens excels in many ways, birthing a new lens for wide-angle photography. Even though it’s a wide lens, it delivers the quality and aesthetic of a medium format lens, while also being a digital cinema lens. So, with the Otus 28mm lens, you get it all.

If the aperture is $5$ mm, the beam diameter is at most $3.33$ mm, and the beam radius $1.66$ mm. A beam with this radius would have a smaller divergence angle than advertised.

This aspherical power zoom lens is less compact than the others, but luckily, Sony makes the size worth it with high-res optics for professional 4K video filming. Yup, it’s complete with 18 elements in 15 groups, among them being 6 aspherical and 3 ED glass elements. By these 18 elements alone, this Sony lens’s quality is not matched by many.

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The Canon EF 35mm f/1.4L II USM Lens comes with every benefit of an aspherical lens and then some. The same anti-aberration and anti-distortion features ensure crystal clear images and blue spectrum refractive optics that virtually erase any chromatic aberrations, so users can enjoy precise coloring.

This lens is made for Sony E Mount and L Mount, so you don’t have to worry about it not fitting with your camera. Along with its compatibility with a wide range of cameras comes its key features: Eye-Detection Autofocus, dust and splash-proof body, and an AFL button on the lens barrel.

The lens comes in a Distagon design perfect for both SLR and mirrorless systems, letting a lot come in touch with this lens’s outstanding optical performance. It also effectively corrects field curvature and maintains excellent image quality even when you venture into its longer focal lengths.

Aspheric lensthorlabs

As we conclude, know that you’re making the right choice with aspherical camera lenses. It might cost a little more, but it prompts less time in post-production thanks to it lessening aberrations, so it’ll be incredibly worth it. However, if you’ve realized while reading this list that you’re not an aspherical lens type of person, do your research about spherical lenses!

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Step into a world of lens brilliance with the Nikon 24mm f/1.8G ED AF-S NIKKOR Lens! It’s tailored to capture life’s best moments in unmatched clarity, with aspherical and ED elements teaming up to combat any aberration.

Aspheric lensEdmund

Aspherical lenses have stayed on top of the game as a tool that both amateur and pro photographers use. Contrasting with traditional spherical lenses, aspherical lenses have a more complex surface profile – so, they protect your images from many optical aberrations that threaten to damage their quality. This means sharper images, better light transmission, and just a high-level performance overall.

Such a design in the aspherical lenses allows for more aberration correction, which is typically more common in spherical lenses, often referred to as “spherical aberration.” Spherical aberration happens when light rays passing through the round lens’s edge focus at a different point rather than passing through the center of the lens.

This lens has 8 advanced elements, including a special aspherical element to correct distortions, extra-low dispersion glass to minimize color fringing, and high-refractive index elements for razor-sharp clarity. The wide aperture enhances low-light performance but also delivers dreamy, rounded bokeh. Finally, the lens has a superior light transmission of up to T1.5, so you already know every shot will be bright and vivid.

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To avoid this, the aperture should be large enough that the bean intensity at the edge is at most $1$ % of the central intensity. That works out to be a aperture $1.5$ times larger than the beam diameter.

99% average reflectance in the 350 - 400 nm, 400 - 750 nm, 750 - 1100 nm, or 1280 - 1600 nm spectral ranges. Back side polished mirror options are also ...

Asphericallens

Aspherical lenses improve the video quality in digital cinema cameras by lessening optical aberrations. Also, this type of lens offers superior light transmission and eliminates flare and ghosting effects.

You bet! Aspherical lenses can be used with different types of cameras. For example, mirrorless, rangefinder, digital cinema, SLR, and medium format cameras.

Or the beam could be something other than a perfect Gaussian beam. The presence of higher modes would make a beam with a $1.66$ mm radius have a larger than ideal divergence angle.

Corrective lenses

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The Fujifilm GF 80mm lens changes the game of large format photography by taking things up a notch. This aspherical camera lens boasts the world’s fastest autofocus for medium or large-format mirrorless systems, with a super-wide aperture of f/1.7.

Take it everywhere – from within the studio to beyond! Its GFX sensor’s vastness helps any user shoot photographs in stunning quality, especially portraits, surrounded by beautiful bokeh. Its rugged design and weather-resistant seal help, too, just in case you want to shoot out in the desert or the rain.

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The word “aspherical” hints that these lenses have a more complex shape, the farthest thing away from spherical. Specifically, the difference between spherical lenses vs. aspherical lenses goes like this: traditional spherical lenses have a very symmetric and uniform curve across their entire surface, while aspherical lenses feature a curvature that does not stay the same throughout the lens.

You might notice that it has an ergonomic crescent-shaped focus tab, and this is a very important part of this type of aspherical lens – this highly improves the lens’s focusing capabilities. Additionally, this camera lens has click and de-click aperture modes that further enhance its versatility for all niches of photography.

Optical lenses

The THYPOCH Simera 28mm f/1.4 lenses are compatible with Z, E, X, and RF mounts, offering the widest range of compatibility among this list. This aspherical camera lens offers a wide f/1.4 aperture and a diaphragm with 14 blades, giving mesmerizing bokeh and amazing subject isolation.

Lenticularlens

Its f/1.4 aperture allows users to capture stunning images even in low light. Its efficiency in low light plus its 56mm equivalent focal length on APS-C for versatility makes it a great lens for shooting outdoors at night, just in case you’re into street photography or night sky photography.

Then we may calculate $$w_0 = \frac{\lambda}{ \pi \theta} = \frac{1500 nm}{\pi \times 0.5 \times 10^{-3}} = 0.0009549... m$$ and $$z_R = \pi w_0^2/\lambda = \frac{\pi \times (0.0009549... m)^2}{1500 nm}= 1.909... m.$$

Aspherical cameras are for almost everyone. So, even if you’re reading this because you’re into capturing eye-catching stills or shooting videos in crisp quality – you’re still in the right place. You should study this guide carefully, especially as we discuss the types of aspherical lenses along with their significance, applications, and advantages. Specifically, we will talk about mirrorless, rangefinder, digital cinema, SLR, and medium format cameras.

Panasonic’s S PRO is a non-traditional lens that has a constant f/2.8 aperture. It’s designed to meet LEICA’s standards, it features advanced focus breathing suppression. You can take this lens anywhere the wind takes you – it is dust, splash, and freeze-resistant, after all. Its 82mm filter diameter and 11-blade circular diaphragm take a user’s imagination to new heights, making it an ideal lens for landscape photography, portrait photography, and street photography.

Such a price range is from their very intentional design and manufacturing process. The longer to make, the more expensive.

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You need a bigger aperture than the beam diameter to avoid cutting off the outer portion of the beam. If you do that, you have passed the beam through a large pinhole. A pinhole causes diffraction. It isn't as bad with a large pinhole, but it is enough that the beam has a larger divergence angle than it should.

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It is usually assumed that the waist of the laser beam is at the exit pupil. However, that may not be true in your case. The way you phrase it (which I assume is how the laser specs are stated) does not necessary imply that the 5 mm at the exit means that the waist diameter is 5 mm. It could be that the device contains some lenses producing a converging beam at the exit. That would make sense in the context of laser scanning.

GRINlens

A constant f/4.0 aperture provides users with consistent exposure and depth of field, perfect for a wide range of photography niches. Now, let’s talk zoom – it has a 6.1x high zoom ratio that covers from a wide 18mm to a tele 110mm, ready to meet any photoshoot need. Additionally, it has versatile zoom controls that offer both manual zoom and smooth servo zoom, ensuring a precise but flexible zoom!

Hasselblad assures the photography world that this aspherical camera lens gives top-class optical performance. Within it is a fully upgraded focusing module that enables fast and accurate autofocus – with it, just hold the shutter and click, and you’ll be all done with the snap of your finger!

But then the radius is equal to the output radius $5mm/2 = 2.5 mm$ at distance $z \approx 4.6209 m$, which is insane. The device is surely not 5 meters long. So have I understood the parameters of Gaussian beam incorrectly, or is there some optical tricks happening inside the laser device? Or is it so that the Gaussian model is accurate only for the Gaussian shape, not for the radius calculation?

What you can do is to make some measurements to get a rough estimate of the beam size at different distances. A plot of these beam sizes as a function of distance should give you an idea of the location of the waist.

People turn to aspherical camera lenses to element different kinds of optical aberrations. The aspherical lenses have an irregular curvature which helps correct aberrations, thus producing sharper images and providing better performance.

The intended output of many lasers in laser scanning is Gaussian. At distance $z$ from the waist, the radius of a Gaussian beam is calculated as $$w(z) = w_0 \sqrt{1+(z/z_R)^2},$$ where $w_0$ is the waist radius, and $z_R = \pi w_0^2/\lambda$ is the Rayleigh range, depending on the waist $w_0$ and the wavelength $\lambda$. When distance $z$ is considerably larger than $z_R$, the radius $w$ grows approximately linearly, $$w(z) \approx \theta z,$$ where $$\theta = \frac{\lambda}{\pi w_0}$$ is the divergence angle.

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This lens boasts a 100-megapixel sensor as well as advanced image quality and a 5-axis IBIS – wow! It’s crafted with amazing attention to detail, but don’t expect any less from a Hasselblad.