NEW YORK, April 1, 2024 /PRNewswire-PRWeb/ -- NFP, a leading property and casualty broker, benefits consultant, wealth manager and retirement plan advisor, today announced the acquisition of the assets of SDN Insurance Agency (SDN). SDN is a multidisciplinary insurance broker providing commercial lines P&C, as well as employee benefits, surety and personal risk solutions, to middle-market clients in the Northeast. NFP acquired the assets of the firm from Financial Institutions, Inc., the parent company of Five Star Bank. Bill Gallagher, president of SDN, will join NFP and report to Mike Walsh, co-president of NFP's Northeast region.

Eyepiece ocular lens functionin microscope

Objective Lenses: Compound microscopes have multiple objective lenses mounted on a rotating nosepiece, typically with magnifications ranging from 4x to 100x or higher. Other microscopes, such as dissecting or stereo microscopes, usually have fixed magnification lenses.

Diopter adjustmentfunction

Diaphragm or Iris: Many microscopes have a rotating disk under the stage. This diaphragm has different sized holes and is used to vary the intensity and size of the cone of light that is projected upward into the slide. There is no set rule regarding which setting to use for a particular power. Rather, the setting is a function of the transparency of the specimen, the degree of contrast you desire and the particular objective lens in use.

Ocular lensand objectivelenstotal magnification

Condenser Lens: The purpose of the condenser lens is to focus the light onto the specimen. Condenser lenses are most useful at the highest powers (400x and above). Microscopes with in-stage condenser lenses render a sharper image than those with no lens (at 400x). If your microscope has a maximum power of 400x, you will get the maximum benefit by using a condenser lenses rated at 0.65 NA or greater. 0.65 NA condenser lenses may be mounted in the stage and work quite well. A big advantage to a stage mounted lens is that there is one less focusing item to deal with. If you go to 1000x then you should have a condenser lens with an N.A. of 1.25 or greater. All of our 1000x microscopes use 1.25 Abbe condenser lens systems. The Abbe condenser lens can be moved up and down. It is set very close to the slide at 1000x and moved further away at the lower powers.

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Compound microscopes and other types of microscopes differ in their design and functionality. Here are the key differences between compound microscope parts and those of other microscopes:

Objectivelens function

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Illumination: Compound microscopes often have built-in illumination systems, such as a substage light source, condenser, and diaphragm, to provide transmitted light through the specimen. Other microscopes, like dissecting or fluorescence microscopes, may utilize different lighting techniques or illumination configurations.

Rack Stop: This is an adjustment that determines how close the objective lens can get to the slide. It is set at the factory and keeps students from cranking the high power objective lens down into the slide and breaking things. You would only need to adjust this if you were using very thin slides and you weren't able to focus on the specimen at high power. (Tip: If you are using thin slides and can't focus, rather than adjust the rack stop, place a clear glass slide under the original slide to raise it a bit higher).

What iseyepiecein microscope

Sample Size and Depth of Field: Compound microscopes are designed to observe thin, transparent specimens placed on glass slides. They offer a narrow depth of field, allowing clear focus on one plane at a time. Other microscopes, like stereo or electron microscopes, can accommodate larger specimens or samples with more depth, providing a wider depth of field.

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1. Ocular eyepiece lens to look through. 2. Objective lens, closest to the object. Before purchasing or using a compound microscope, it is important to know the functions of each part. This information is presented below. Links will take you to additional information and images.

Compound microscopeeyepiece ocular lens function

Magnification: Compound microscopes are designed for higher magnifications, typically used for observing microscopic details. Other microscopes may have lower magnification capabilities, suitable for larger specimens or samples.

Body tube microscopefunction

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Historians credit the invention of the compound microscope to the Dutch spectacle maker, Zacharias Janssen, around the year 1590 (more history here). The compound microscope uses lenses and light to enlarge the image and is also called an optical or light microscope (versus an electron microscope). The simplest optical microscope is the magnifying glass and is good to about ten times (10x) magnification.

About NFP NFP is a leading property and casualty broker, benefits consultant, wealth manager, and retirement plan advisor that provides solutions enabling client success through the expertise of over 8,000 global colleagues, investments in innovative technologies, and enduring relationships with highly rated insurers, vendors, and financial institutions. NFP is the 8th best place to work for large employers in insurance, 7th largest privately-owned broker, 7th largest benefits broker by global revenue and 13th largest broker of US business (all rankings according to Business Insurance).

SDN has been serving the greater Buffalo community since 1923. Their mission to help customers anticipate, measure and understand the risks of everyday life using a consultative and customer-focused approach aligns well with NFP's focus on helping clients overcome their most significant challenges.

Ocular lensmagnification

Revolving Nosepiece or Turret: This is the part of the microscope that holds two or more objective lenses and can be rotated to easily change power.

Objective Lenses: Usually you will find 3 or 4 objective lenses on a microscope. They almost always consist of 4x, 10x, 40x and 100x powers. When coupled with a 10x (most common) eyepiece lens, total magnification is 40x (4x times 10x), 100x , 400x and 1000x. To have good resolution at 1000x, you will need a relatively sophisticated microscope with an Abbe condenser. An Abbe condenser is composed of two lenses that control the light that passes through the specimen before entering the objective lens on the microscope. The shortest lens is the lowest power, the longest one is the lens with the greatest power. Lenses are color coded and if built to DIN standards are interchangeable between microscopes. "DIN" is an abbreviation of "Deutsche Industrial Normen". This is a German standard that has been adopted internationally as an optical standard used in most quality microscopes. A typical DIN standard microscope objective lens has a 0.7965" (20.1mm) diameter threads, 36 TPI (threads per inch), and a 55º Whitworth. Many high power objective lenses are retractable (i.e. 40XR). This means that if they hit a slide, the end of the lens will push in (spring loaded) thereby protecting the lens and the slide. All good quality microscopes have achromatic, parcentered, parfocal lenses.

Illuminator: A steady light source (110 volts) used in place of a mirror. If your microscope has a mirror, it is used to reflect light from an external light source up through the bottom of the stage.

Eyepiece/Ocular: Compound microscopes commonly have a pair of eyepieces that provide binocular vision. Other microscopes may have a single eyepiece or sometimes no eyepieces at all.

Stage with Stage Clips: The flat platform where you place your slides. Stage clips hold the slides in place. If your microscope has a mechanical stage, you will be able to move the slide around by turning two knobs. One moves it left and right, the other moves it up and down.

It's important to note that the term "other microscope parts" is quite broad and can include various microscope types with different designs and features. The above differences are generalized and may not apply to every microscope outside the category of compound microscopes.

"This is a great opportunity for our team that will benefit the clients we serve," said Gallagher. "With exceptional relationships across the region and access to NFP resources that will enhance our ability to meet the dynamic needs of our clients, we are well positioned to be a meaningful contributor to NFP's growth in the Northeast. We're also proud to be joining an organization that shares our values and commitment to doing business with integrity."

"We're excited to welcome Bill and the SDN team to NFP," said Walsh. "This acquisition expands NFP's presence in the Buffalo market, while also strengthening our position in Rochester, with an experienced and connected team of insurance professionals. In addition to SDN's consultative approach and expertise, which complement our property and casualty insurance and benefits consulting offerings, we're looking forward to working with a team that has a rich history and outstanding reputation in the Western New York market."

Applications: Compound microscopes are commonly used in fields such as biology, medicine, and research, where detailed examination of small structures is required. Other microscopes, such as stereo microscopes, are utilized for examining larger objects or conducting dissections. Electron microscopes are used for high-resolution imaging of nanoscale structures.

How to Focus Your Microscope: The proper way to focus a microscope is to start with the lowest power objective lens first and while looking from the side, crank the lens down as close to the specimen as possible without touching it. Now, look through the eyepiece lens and focus upward only until the image is sharp. If you can't get it in focus, repeat the process again. Once the image is sharp with the low power lens, you should be able to simply click in the next power lens and do minor adjustments with the focus knob. If your microscope has a fine focus adjustment, turning it a bit should be all that's necessary. Continue with subsequent objective lenses and fine focus each time.

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