L = long working distance objective lens. This is an objective lens with a long working distance (the distance from the tip of the objective lens to the specimen surface when focused). In general, there is a trade-off between resolution and working distance. If you want space between the objective lens and the sample, or if you want to observe deep parts, give priority to working distance over resolution.

Mr Musk's interview with the presidential hopeful was delayed by 40 minutes while the platform struggled with tech issues.

Meanwhile Alp Toker, director of Netblocks, said the social media platform's explanation of how the issue was fixed "isn't particularly consistent" with a DDoS attack.

An interview that was meant to show off the capabilities of a platform that, we are told, will one day become an "everything app" ended up showing its old technical limitations have not gone away.

Our website provides a wide range of technical content and product information about our microscope objective lenses. For more details, simply refer to the following links:

"This also may have been escalated due to the fact Mr Musk laid off large swathes of employees when he took control of the platform.”

Working distanceof 4x objective

Some (of course) took the opportunity to take aim at Mr Musk. Others spun the interview as having been of such great interest that it had "crashed the internet".

But even with that preparation, he was unable to deal with the tech problems that followed, as according to Reuters, around 1.3 million people listened in at one point.

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He may be the richest man in the world, but - as his glitch-prone conversation with Donald Trump showed - it seems Elon Musk still can't overcome X's technical problems.

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He said it was "impossible for us to know" because X does not use Cloudflare to secure its Spaces system, but he said his firm did reach out to Mr Musk to offer assistance.

This code indicates whether it is a dry objective lens used for observation without immersion liquid or an immersion objective lens for observation using immersion liquid. In the case of immersion objectives, the liquid used is represented by the symbol O for oil or W for water.

A distributed denial of service attack - or DDoS for short - is an attempt to overload a website, which makes it hard to use or otherwise inaccessible..

*The objective may work with other observation methods not expressed in the code, including brightfield (reflected), brightfield (transmitted), darkfield (reflected), darkfield (transmitted), DIC (reflected), DIC (transmitted), phase contrast, relief contrast, polarization, fluorescence (B/G excitation), UV fluorescence (at 365 nm), multiphoton, total internal reflection fluorescence microscopy (TIRF), and infrared (IR). Please refer to our website for the full objective specifications.

Working distance microscopeformula

DIC observation* is possible due to features such as the pupil position that matches the microscope system from Evident. In addition, it has good transmittance at 365 nm (the U excitation wavelength) and has low autofluorescence, enabling fluorescence observation by U excitation.

Objective lenses are crucial to a microscope’s performance as they affect the quality of the formed image. Evident offers more than 200 types of objective lenses to suit a wide range of imaging requirements in life science and industry. With so many options available, you might be wondering which objective is best for your work.

The code M stands for metal, and it is an objective lens for observation without a cover glass. In addition, the following codes are used according to the length of the working distance and optical performance.

Working distanceof 40x objective

Objectives with PL or Plan are corrected for field curvature at the periphery of the field. This objective type is particularly suitable for imaging because it can focus not only on the center of the field of view but also on the periphery. This enables you to obtain a flat image from the center to the edge.

This is where microscope objective specifications come in. These specifications tell you the optical performance, such as magnification, aberration correction, and other parameters. You don’t have to look far to find them—in fact, our specifications are listed as a code within the objective lens name! This makes it easy to distinguish between objective types at a glance.

In addition to the name of the objective lens, information on the numerical aperture (NA), magnification, cover glass thickness, immersion liquid, and objective field number (OFN) is provided on the exterior of the objective lens. Below is an example of the UPLXAPO100XO objective that explains how to read these specifications.

ACH = achromat. Excellent correction of chromatic aberration in two colors (blue and red). FL = semi-apochromat. Excellent correction of chromatic aberration in three colors (blue, green, and red). APO = apochromat. Corrects the chromatic aberration of three colors (blue, green, and red) better than FL.

The correction range for chromatic aberration differs for each code. There are three types, ACH, FL, and APO, and the chromatic aberration performance is defined in the same way as the objective lenses for life science.

"Without adequate staffing, the ability of social media platforms to protect their networks and users from DDoS attacks is severely compromised."

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Like the life science objectives, industrial objectives marked PL or Plan are corrected for field curvature at the periphery of the field of view. This objective type is particularly suitable for imaging because it can focus not only on the center of the field of view but also on the periphery. This enables you to obtain a flat image from the center to the edge.

Working distance definition

Note that SAPO and XAPO are Evident's original names that indicate the grade of chromatic aberration. Detailed definitions of ACH, FL, and APO are described in ISO, so please refer to ISO19012-2.

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“While we cannot definitively state the underlying cause of the event, Cisco ThousandEyes did not observe traffic conditions typically present during a DDoS attack, such as network congestion, packet loss, and elevated latency," it said.

We hope this list of microscope objective specifications was helpful! Be sure to bookmark it for easy reference when selecting an objective lens. If you are unsure about choosing an objective lens or have any questions, feel free to contact us. We can help you select the best objective based on factors such as sample type, imaging technique, numerical aperture, and desired magnification.

“Spaces has historically folded when large numbers of users have entered this area of X", said Jake Moore, Global Cybersecurity Advisor at cyber security firm ESET.

The network intelligence company, Cisco ThousandEyes, also said there was a lack of evidence pointing to a cyber attack.

Parfocalmicroscope definition

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His thoughts were echoed by Rashik Parmar, head of BCS, the chartered institute for IT, who said even if it was a cyber attack, "firing 80%" of the firm's engineers was always going to have "a significant impact".

Field of viewmicroscope definition

M = metal (no cover) LM = long working distance for metal SLM = Super long working distance for metal MX = high NA and long working distance for metal

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"Limiting the number of legitimate users isn't an ordinary mitigation for DDoS attacks and wouldn't usually help... so Mr Musk's own statement suggests that the platform might have been struggling with overall listener capacity."

U = universal objective lens. This objective lens achieves a high level of basic performance in terms of both differential interference performance and fluorescence performance capable of U excitation. It can be used for brightfield observation and fluorescence observation by blue/green (B/G) excitation, as well as for differential interference contrast (DIC) observation and fluorescence observation by U excitation.

"Given Elon Musk's claim that X had to limit the number of live listeners to mitigate the issue, we can infer that the outage correlated to the number of live listeners," said Mr Toker.

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We will use the MPLFLN100XBD objective lens as an example in the industrial field. Note that some of the specifications are the same as those of objective lenses for life science. For industrial objectives, you can understand the objective lens name at a glance by dividing it into five parts, 1 through 5.

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There is another, more prosaic, explanation for what happened: the deep cuts to the company's workforce that Mr Musk instigated.

ACH = achromat. Excellent correction of chromatic aberration in two colors (blue and red). FL = semi-apochromat. Excellent correction of chromatic aberration in three colors (blue, green, and red).  APO = apochromat. Corrects the chromatic aberration of three colors (blue, green, and red) better than FL. SAPO = super apochromat. Good correction of chromatic aberration in the visible to infrared range (435 to 1000 nm). XAPO = extended apochromat. Good correction of chromatic aberration in the visible to infrared range (400–1000 nm).

Working distance microscope definitionpdf

For life science, we’ll use the objective lens called UPLXAPO100XOPH as an example. You can understand the optical performance from the objective lens name by dividing the name into six parts, 1 through 6. Below is an overview, and we’ll explain each part in the following six sections.

But, much like his ultimately doomed campaign, problems plagued the interview from the outset. Gremlins meant Mr DeSantis had to sit and wait before he could even give his speech.

Working distanceof 10X objective

Makoto Kuwano has been in charge of microscope product development for 12 years at Evident. He currently works in the Optical Development Division, where he is involved in optical design of objective lenses, development of component products, and development of measurement techniques for product performance. He holds a Master of Science degree from Tohoku University in Japan.

The BBC cannot independently verify whether such a cyber attack occurred or not, but tech blog The Verge says its sources at X told it there was no such attack.

In this post, we’ll share how to read the optical performance from the name of a microscope objective so that you can easily find the correct objective lens for your application. As our objective lenses for life science and industrial applications have different naming rules, we’ll discuss how to read the specifications for each field.

Just like the life science objectives, the number before the X in industrial objectives represents the magnification of the objective when combined with a tube lens from Evident with a focal length of 180 mm. Evident offers objectives with magnifications ranging from 1.25–150X.

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The number before the X represents the magnification of the objective when combined with a tube lens from Evident with a focal length of 180 mm. Evident offers objectives with magnifications ranging from 1.25–150X.

*The objective may work with other observation methods not expressed in the code, including brightfield (reflected), brightfield (transmitted), darkfield (reflected), darkfield (transmitted), DIC (reflected), DIC (transmitted), phase contrast, relief contrast, polarization, fluorescence (B/G excitation), UV fluorescence (at 365 nm), multiphoton, total internal reflection fluorescence microscopy (TIRF), and infrared (IR). Please refer to our website for the full objective specifications.

It seemed to be a cautionary tale that Mr Musk was heeding - the day before his interview with Mr Trump he said he would be performing "system scaling tests" on "Spaces" - the name for X's audio chat feature.

The correction range for chromatic aberration in objectives differs for each code. The level of chromatic aberration improves in the order of ACH, FL, APO, SAPO, and XAPO. If chromatic aberration is well corrected, sharp fluorescence images with no out-of-focus areas can be obtained for each color even in multicolor observation using fluorescent reagents covering a wide band.