Manual Linear Stage Basics (WITH HOW-TO VIDEOS) - translation stage

 2024-11-02 11:40:47

Chromatic aberration is when a lens doesn’t focus all light wavelengths at the same point, resulting in unnatural colors in your photos. Because these colors are often visible along high-contrast edges, this problem is known as fringing.

The appearance of purple color in your photos is a common manifestation of chromatic aberration, particularly when high-contrast areas are present. It occurs when different wavelengths of light are focused at different points, causing a purple fringing effect.

When it comes to durability and brute strength, ExiscanTM is without peers. See it for yourself, contact your local Distributor.

It’s important to note that converting an image to black and white won’t magically eliminate the blur caused by chromatic aberration. So, even if you plan to shoot in black and white, it’s still worth mastering the art of avoiding chromatic aberration in the field. However, when faced with persistent fringing that’s difficult to remove through other means, this method can provide an effective solution.

XIR Infrared Windows with patent-pending polymer infrared optic is uniquely suited for industrial and facilities maintenance environments: Built like a tank, resilient and warranted for life, accurate and compatible with all models of cameras, big enough to see it all with fewer windows, yet surprisingly affordable.

The feat of engineering required to correctly align all of these different light rays is generally achieved by the manufacturer’s use of a lens array (rather than a single lens element). In fact, if you were to pull your favorite camera lens apart, you’d probably find upward of 16 lens elements – all designed to correct for various things along the light’s journey between your lens and your sensor.

Note that using a zoom lens at its widest will usually introduce various other defects in your image. So if you’re set on a wide-angle perspective, choose a prime wide-angle lens to handle the job, or make a panorama at a longer focal length, then join the photos in post-processing.

is an avid photographer, videographer and constant tinkerer who loves getting his hands dirty with camera and photo rigs. Check out his collection of professional photography tutorials on OziRig Academy or keep in touch via Twitter. He currently bases himself in the beautiful city of Medellín, Colombia. Se habla español 🙂

Ir windowcost

There’s no easy in-camera method of avoiding contrast. So there’s often nothing you can do here except adjust your composition. Swap your backdrop out to something that more closely matches your subject’s tones, or simply wait for more favorable lighting conditions.

IR Windowfor electrical panel

(Note: A narrower aperture will specifically reduce longitudinal chromatic aberration but won’t affect lateral chromatic aberration, so if you’re not seeing the results you want, try one of the other options on this list.)

Higher-quality lenses, although often pricier, offer a range of benefits beyond minimizing chromatic aberration. These lenses boast superior optics for better image quality overall as well as fast focusing, a robust build, and smooth handling.

CA doesn’t look so great, and it can also reduce image sharpness. Therefore, photographers often funnel significant time and money into avoiding or removing chromatic aberration in their images. Fortunately, as I discuss below, there are a handful of ways of dealing with CA – though they’re not all equally effective, so it’s important to make careful choices both in the field and in the editing room for the best results.

But fear not! In this article, we’ll delve into the realm of chromatic aberration. I’ll explore its causes, and I’ll equip you with practical strategies to avoid it like a pro.

To eliminate chromatic aberration, you can use post-processing techniques in editing software that offer chromatic aberration removal tools. Additionally, using lenses with low-dispersion elements can significantly reduce or eliminate the issue.

XIR OverviewXIR Window AnatomyXIR SpecificationsXIR InstallationXIR Part #s / OrderingWhy IR WindowsWhy Exiscan™Request a QuoteRequest a Demo

Chromatic aberration tends to flare up when shooting high-contrast scenes. Particularly problematic are darker subjects surrounded by white backdrops, landscapes against a bright sunrise, or – as in the example of the cheetah above – heavily backlit subjects.

Unfortunately, this is also where chromatic aberration tends to rear its ugly head. Hidden within the design of these lens elements are defects – either in the glass or the design of the lens itself – which, under specific conditions, may cause your photos to exhibit CA.

Chromatic aberration is caused by the inability of a lens to focus all colors of light at the same point, resulting in color fringing in your photos.

Another factor to consider is that open-panel inspections, by their nature, introduce the possibility of many variables for reflected energy (off highly reflective metallic components. Less experienced thermographers could easily misinterpret theses these reflections from hot or cold elements in the background, resulting in false-positive and false-negative reports. Because the closed doors and panels of the enclosure are a relatively uniform ambient temperature, actual differences in temperature are more easily identified.

Chromatic aberration is often more noticeable toward the edges of the frame, not the center. (This is generally due to the curvature of the lens elements.)

Chromatic aberration happens because your lens acts as a prism. It bends light, and the colors passing through the lens are split at different angles.

So instead of using an f/2.8 or f/4 aperture, try going to f/8 or f/11 – then take a few test shots to see if the chromatic aberration has disappeared. Of course, you’ll need to consider reducing the shutter speed or boosting the ISO to compensate for the light loss.

Why Polymer? ExiscanTM designed it’s IR windows for the industrial electrical market. With this in mind, traditional laboratory crystals were not an option. After extensive testing and research, we saw that only polymer satisfies the most important demands of the industrial market:

The difference between these two types of chromatic aberration might seem trivial, but identifying which type is causing the issue can be helpful in finding the most effective solution.

IRwindows for switchgear

Chromatic aberration is a major problem, especially on cheap lenses. But the good news is that, if you are stuck working with a lens that exhibits some form of visible chromatic aberration, there are several easy-to-understand strategies to remove or minimize its effect on your photos.

Don’t let chromatic aberration ruin your shots! Discover everything you need to know about pesky fringing and learn how to banish it from your photos.

Fixing chromatic aberration can vary in difficulty depending on the severity and type. While some photo editing software provides tools to remove it, complete elimination may require more manual adjustments or using higher-quality lenses.

If the results are satisfactory, you can proceed with your usual editing process. However, if the chromatic aberration persists, you might consider trying manual adjustments within the software or experimenting with a different editing program.

FlukeIR Window

Are you focused on worker safety, process improvement, operational efficiency, data improvement, cost control or all of the above? Exiscan™ would be honored to help you achieve your condition monitoring goals.

ExiscanTM won’t compromise on safety, accuracy or usability. That’s why we over-engineer our design and only use industrial-grade materials - like polymer, aluminum and stainless steel.

Ease of Inspection: Imagine the benefits of monitoring hyper-critical applications and "bad actors" more frequently using IR windows. In just a few minutes, without requiring elaborate PPE or work processes, thermographers will troubleshoot and inspect critical electrical equipment through the specially designed IR window optic, thereby eliminating inherently risky and time-consuming tasks. The ease of inspection provides facilities with the latitude to inspect more frequently to ensure maximum facility up time.

Compliance: Comply with insurance mandates to perform annual infrared inspections, while also complying with the regulations imposed by NFPA 70E and CSA Z462. The de-risked work process of using an IR Window eliminates the high-risk tasks (opening the enclosures) associated with typical infrared inspections. As a result elevated levels of PPE are not required, and complying with the standards is automatic.

Longitudinal chromatic aberration occurs when different colors focus in front of and behind one another. This type is commonly observed in telephoto lenses and less common when using wide-angle glass. The manifestation of longitudinal chromatic aberration is seen as unnatural colors across the entire image, rather than just at the edges.

Are you struggling with chromatic aberration in your photos? Have you tried any of the measures discussed above? Share your thoughts (and images) in the comments below.

When aiming to minimize chromatic aberration, it’s essential to consider the quality of your lens. Different lenses exhibit varying levels of fringing, which can be attributed to factors like focal length and lens design. By investing in a lens with limited chromatic aberration, you can significantly reduce the occurrence of color fringing in your images.

Well, that’s it: All the chromatic aberration essentials, including what it is and how to avoid it. Now armed with knowledge and strategies, you’re ready to conquer this pesky foe and unlock the full potential of your images.

XIR OverviewXIR Window AnatomyXIR SpecificationsXIR InstallationXIR Part #s / OrderingWhy IR WindowsWhy Exiscan™Request a QuoteRequest a Demo

Although the result will depend on the type of lens you are using, stopping down your aperture helps minimize most lens defects, including chromatic aberration.

XIR OverviewXIR Window AnatomyXIR SpecificationsXIR InstallationXIR Part #s / OrderingWhy IR WindowsWhy Exiscan™Request a QuoteRequest a Demo

IRISSIRwindows

To find low-CA lenses, seek out models with low-dispersion elements; they’re specifically designed to handle chromatic aberration!

Of course, you may still have noticeable CA around the edges of the frame, but you do have the option to crop this away. It’s not ideal if you need to retain every pixel in your photo (e.g., for large prints), in which case you should consider one of the other preventative measures discussed above. But if you’re creating small prints or you plan to distribute your photo online, cropping shouldn’t be a big issue.

Analyze Better DataBecause using inspection windows does not increase risk of electrical hazards, inspections can be performed during peak load, when data collection is ideal, without worry of accidental process interruption.

Unfortunately, chromatic aberration is sometimes unavoidable, especially when using certain lenses. In such cases, you’ll need to employ post-processing techniques to minimize or eliminate its effects. Many photo-editing programs offer tools to address chromatic aberration, although they may not always provide a perfect solution.

Although it’s nice to have access to a wide range of focal lengths, the fact is that most zoom lenses exhibit chromatic aberration at their focal length extremes. So setting the focal length toward the middle of your lens’s range will usually help remove the offending CA.

When different wavelengths converge at different points, the individual colors become visible, resulting in unpleasant chromatic aberration effects. Take a look at the diagram below. Do you see how the red, green, and blue light hits the sensor in different spots? That’s chromatic aberration at work.

Ir windowkit

De-Risked Work Process: Open-panel inspections are, by their nature, high risk because they introduce a host of potential variables: stirring dust, agitating a conductor or misplaced tool, scaring a rodent, possibly dropping parts into the enclosure, etc. Infrared windows maintain an enclosed and guarded state (per the standards) and remove the high-risk work tasks, thereby reducing the risk of performing thermography through an IR window. The new closed-panel work task does not expose personnel to energized conductors, and is not a task that could trigger an arc. As such, using an IR window is similar to looking in a visual inspection window {Link visual inspection window to our page for same}, reading a panel meter, or simply walking past the same equipment. Facility managers can take comfort in knowing that the new closed-panel is de-risking their inspection process. No longer does an IR inspection represent a threat of a catastrophic outage.

Please let us know how to contact you, and someone from our team will be in touch quickly. If you have an urgent question or concern please contact us at 585-366-0333.

Inspect the Un-Inspectable: After completing arc flash surveys / incident energy analyses, many facilities discover that some percentage of their equipment has extraordinary incident energy levels (per ANSI/IEEE 1584 or similar calculations). Such equipment receives a "Dangerous" label, and becomes off limits to thermographers. IR windows allow the thermographers to still survey desired targets in "Dangerous equipment" (through the IR window) while equipment remains closed and guarded in compliance with standards like NFPA 70E and CSA Z462.

It may sound simple, but various wavelengths (and thus various colors) strike your lens all at once, and each of these wavelengths will behave slightly differently depending on the lens glass that it is passing through.

(*) Required Fields First Name(*) Please enter your first name. Last Name(*) Please enter your last name. Company Name(*) Please enter your company name. Email(*) Please enter your email address. Phone(*) Please enter your phone number. So that we can quickly connect you with your local agent, the following is requested, but not required: Country Please enter your company Country. City Please enter your company city. State Please enter your company State. Postal Code Please enter your company postal code. What can we do for you? Click all that apply(*) Request DemoRequest QuoteProduct or Technical QuestionsBecome a Distributor or RepOther (specify below)Please select at least one option above. Please let us know any more information that could help us help you Invalid Input

FLIRIRWindows

If you come across a photo with noticeable chromatic aberration or find yourself in a situation where it can’t be avoided, post-processing can be a game-changer. Fortunately, popular editing software like Lightroom, Luminar, and Capture One offer straightforward tools for chromatic aberration removal. The process is usually as simple as clicking a button or selecting a checkbox, although you may have the option to fine-tune the results manually.

Here, it’s important to remember that light is actually made up of several different wavelengths (colors). So for your camera’s sensor to capture the combined color of light, your lens needs to make all wavelengths of that particular ray hit the exact same point on your sensor.

On the other hand, lateral chromatic aberration occurs when different colors focus at different points along the same plane, next to one another. This type is commonly observed in wide-angle lenses. Lateral chromatic aberration manifests as unnatural colors along high-contrast edges in the image.

Therefore, if you reframe your shot but put your main subject closer to the middle, you’ll often end up with little-to-no chromatic aberration on your subject.

Over-Engineered for Your SafetyThe XIR series is built to out-live your enclosure. Our window body and cover are machined from half-inch bar stock aluminum. All other components are stainless steel.

Chromatic aberration is a huge image-quality killer, but many photographers don’t know what it is and how it can be prevented.

While many photographers are familiar with chromatic aberration as color fringing, it’s important to understand that there are actually two types: longitudinal (axial) chromatic aberration and lateral (transverse) chromatic aberration. Both types involve the focusing of different wavelengths at different points, but their key distinction lies in the direction of the differential focusing.

That said, don’t be disheartened if you encounter a hint of color fringing in your shots. With the right techniques, you can minimize or even eliminate the problem.

Data Quality: Industry best-practices and standards (including NFPA 70B) note that IR scans must be performed when conductors are fully loaded (or as close as possible). Yet on inspection day(s) it is quite common that at least some percentage of equipment is unloaded or lightly loaded. Consequently, data is gathered and analyzed under conditions that could easily yield false-negative results. The ease, safety and speed of inspecting through an IR window means that thermographers can schedule inspections on days and hours when equipment is "running all out" – the best time to gather data.

Now, I’m not saying you need a pro-level lens. In fact, a key point is that all lenses suffer from chromatic aberration in one form or another, no matter the cost. What matters is whether or not your lens exhibits visible chromatic aberration, and whether the amount of visible CA is a dealbreaker for your particular needs.

IRwindows for transformers

Chromatic aberration can have a significant impact on the quality of your photographs if you don’t take steps to avoid it. This optical phenomenon can make your images look imperfect and even amateurish. While a small amount of chromatic aberration may go unnoticed, once it becomes noticeable, it will distract the viewer and diminish the overall unity of the photo.

Access the Inaccessible:How does your facility inspect equipment that can no longer be opened while energized due to that equipment’s voltage or incident energy rating? How does your facility inspect equipment protected by switched interlocks? IR inspection windows allow maintenance engineers to monitor otherwise “inaccessible” equipment.

Easily comply with OSHA, NFPA 70E, CSA Z462 and similar electrical safety mandates by using closed-panel inspection methods. Infrared (IR) Windows allow workers to perform IR inspections of electrical components while keeping energized electrical equipment closed, and in "normal operating condition."Closed-panel inspections eliminate inherently high-risk tasks, such as removing panels or opening hinged doors, making IR inspections safer for personnel, plant assets and processes.

XIR OverviewXIR Window AnatomyXIR SpecificationsXIR InstallationXIR Part #s / OrderingWhy IR WindowsWhy Exiscan™Request a QuoteRequest a Demo

If you’re finding it challenging to effectively remove chromatic aberration using the dedicated tools in your photo editing software, there’s another straightforward option at your disposal: converting the image to black and white. While not every photo looks as striking in black and white as it does in color, this quick conversion can be a powerful technique for dealing with those unsightly color fringes.

To help you understand chromatic aberration a bit better, remember that the focal plane is your sensor’s point of focus, where all the light from your lens should join together to be correctly captured and recorded. But depending on the construction of your lens and your chosen focal length, certain wavelengths (colors) may converge at points in front of or behind the focal plane; wavelengths can also converge at a point that’s off-center.

To begin, import the problematic image into your preferred editing software and locate the chromatic aberration removal tool. Typically, you can find it under the lens correction panel. Activate the tool and let the software do its thing; then take a look at the Before and After views, if available. Assess whether the chromatic aberration is completely eliminated or at least significantly reduced.