Plane of polarization - polarization direction

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Measure laser power and energy with ease and precision over a huge range of wavelengths, power levels, and pulse energies.

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The SZX Series stereo microscopes offer excellent optical performance. This system's modularity allows you to create application-specific configurations ...

Immersion Oil: This is a special oil used in microscope work. There are two basic types of immersion oil, Type A and Type B. The only difference between the two is the viscosity. Either will work well. One or two drops of oil are placed on top of the coverslip and the 100X objective lens is brought into position so that it touches the oil and creates a "bridge" of oil between the top of the slide and objective lens. The oil has a refractive index very close to that of glass. This allows very little refraction of the light rays as they go through the slide, specimen, coverslip, oil and through the glass objective lens of your microscope.

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The medium between the lens and the slide can be air or oil. Without getting too technical, the only way to get a Numerical Aperture greater than 1.0 is to use a material with a refractive index greater than 1.0. Oil (1.5) is such a material. So to get the best resolution at 1000x (N.A. 1.25), a drop of this special oil is placed between the lens and the slide. This is why all of our 100XR objective lenses are called oil immersion lenses. They work fine with just plain old air but will give a sharper image with oil (see image comparisons below). The oil can get messy and must be wiped up when you are finished. As a result, most people prefer to use their 100x objectives dry. If you try using immersion oil, clean up with lens tissue or a KimWipe on the lens. Avoid solvents.

Access advanced laser power and energy measurements on intuitive interfaces, with enhanced sampling, pulse analysis, and broad sensor compatibility.

Achromatic lenses address chromatic aberrations by combining multiple lens elements with different dispersive properties. This combination ensures that various ...

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Broadband AR coatings are multi-layered coatings that are tailored to AR the exact bandwidth of the system. These AR coatings can be designed in the visible, ...

Laser powerMeter Ophir

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The yellow band tells us that it is a 10x objective lens. Red is 4x Blue is 40x White is 100x. The first number "10" is the power (10x). The 0.25 is the Numerical Aperture. The 160 is a standard DIN measurement in millimeters of the tube length of the microscope required for this lens to work properly. Finally, the 0.17 is the thickness in mm of the cover slip that you should use. 0.17mm cover slips correspond to a number 1 cover slip.

LabMax Touch is a full-featured laser power and energy measurement system that offers high sample rates (up to 1 Million samples per second), best-in-class analytics, and an industrial design featuring one of the largest touchscreens in its class. LabMax Touch delivers fast, easy measurement of energy, pulse width, and pulse shape, and is compatible with all sensor types including Pyroelectric, Thermopile, Fast Thermoelectric, and optical sensors.

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2017314 — The post discusses the diffraction limited spot size that occurs with a perfectly paraboidal primary telescope mirror, and how it is determined by the size of ...

Numerical Aperture (N.A.): This is a number that expresses the ability of a lens to resolve fine detail in an object being observed. It is derived by a mathematical formula (n sine u) and is related to the angular aperture of the lens and the index of refraction of the medium found between the lens and the specimen. The physical size of the lens is important in determining the N.A. of the lens and to get the most from the lens, a light condensing system should be employed which will completely fill the back lens of the objective with light. To do this, the N.A. of the condensing system must equal or exceed the N.A. of the lens.

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Shop our entire power and energy meter catalog on the Shop.Coherent site. Use the product filters to quickly identify the best meter for any application.

Dec 5, 2022 — Theory. When a light wave is incident on the interface of two media, the original wave is decomposed into a refracted wave and a reflected wave.

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Take fast, accurate laser power measurement with you wherever you go, and use the analog needle display for easy laser tuning.

Coherent has the right meter for you, whether you're performing high accuracy, multi-parameter data acquisition over many hours in the lab, or making a quick laser adjustment in the field.

Some of our entry level microscopes (104-109) do not have condenser lenses at all but still work quite well, even at 400x. See a comparison of images below. What you see are a model 109-L (without a condenser lens at 400x) and a model 138 (with an 0.65 condenser) at the same power. These images have been purposely reduced in resolution for the web but you should be able to compare and see greater resolution with the 138. You'll also note that the image is brighter and whiter. This is a result of the fluorescent vs. the tungsten illuminator.

Customers are increasingly using the LabMax-Pro SSIM meter for deep integration, writing custom code to stream high speed data. This type of meter interface requires a high level of competency on the customer’s side to implement, in addition to our technical guidance. This document is intended to provide tools for success.

Now, back to our discussion on Numerical Aperture. What does this all mean for you? Well, the condenser lens system should have an N.A. greater than or equal to the largest N.A. of the objectives. For a microscope with 400x max power, you need a condenser lens with an N.A. of 0.65 for best possible resolution. An in-stage condenser lens (0.65) works perfectly for these magnifications. At 1000x, you now have an objective rated at 1.25 N.A., so your condenser system should match or exceed that value. You will now want to switch to an Abbe condenser system that can match those values. Without oil, you will never exceed N.A. of 1.0 regardless of what the numbers are on the lenses. So to get the best possible resolution at 1000x, you must use oil.