Colour Contrast Analyser (CCA) - checkers color

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Numerical apertureof lens

Double socket swivel arm features 360-degree center rotation with an overall length of 3.69" and a socket-to-socket length of 3.5" Attaches to any B size ...

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Allen Key also called as Hex Key or Allen wrench, is a L shaped tool used to drive bolts and screws with hexagonal sockets in their heads. Allen key has long arm and short arm design offers extra reach on one end and extra leverage on the other.

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Products made of steel metal are very strong, but they are prone to rust formation. The rusting can be avoided by following preventive measures while storing the components. It can be avoided by keeping the component waxed or oiled and stored in proper boxes.

Black oxide surface finish (aka blackening), which is a coating applied for mild corrosion resistance in dry environments. Black oxide treated metals/fasteners can rust in the right environments, so it should be stored properly to avoid rusting.

NASA does not approve any particular brand of solar viewers. Always inspect your eclipse glasses or handheld viewer before use; if torn, scratched, or otherwise ...

Note: The values provided are based on standard specification, the details are for information purpose only. To verify the dimension accuracy customers are requested to buy sample and verify before making bulk purchases. Always feel free to reach us for any help.

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Download scientific diagram | Holographic image of 1951 USAF resolution test chart: (a) view of Groups 4 and 5 of the chart; (b) enlarged view of Groups 6 ...

Finally, please appreciate that collimation is identical to imaging at infinity. What this means in practice is two-fold

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tl;dr: Select the area you want to stretch/distort, press and hold ctrl+alt on the keyboard, hold the down arrow. This creates the stretched ...

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The quality of the collimated beam may not be fantastic. And it depends on how the light is launched into the fiber. If the incident light has a narrow angular dispersion, and the fiber is short and/or of very good quality with few bends, then the light coming out will have a low angular dispersion. But if the incident light is converging at an angle close to the NA of the fiber, then your analysis should be ok.

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Disclaimer: The product images are for illustration purpose only. Actual product may vary with each unique part number and attributes like size, model, color, etc. We recommend that customers unfamiliar with the products to contact our support team to request a exact images if available from stock. This product comes with warranty against manufacturing defect, refer warranty policy on how to claim warranty. cat/allen-key , pro/allen-key-2mm , id/507

Thorlabs' selection of optics includes objectives, imaging GRIN lenses, condensers, fluorescence filters, an IR blocking filter, dichroic mirrors, ...

$$ n\sin(\theta)=NA \\ \theta = \arcsin(\frac{.22}{1.4914}) \\ \frac{.5 \cdot 38 [mm]}{ \tan(\theta)}=\left \{ \text{focal length} \right \} $$

Next, NA refers to the half angle, not the full angle (see: http://en.wikipedia.org/wiki/Numerical_aperture ). So: $ tan(\theta) = \frac{D/2}{f} = \frac{38 mm/2}{f}$ which gives you $f = \frac{17.5 mm}{tan(\theta)} = 77.6 mm$ .

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Made of hexagonal rod of hard steel, this tool is essential if you are working with Allen head socket bolts and precision automation projects. Precisely-sized ends are chambered to slide easily into fastener, reducing wear on the wrench and damage to fastener head.

Numerical apertureof optical fiber

First, the NA is defined in free space, not inside the fiber. So, NA = 0.22 means that is the NA in air. Therefore, the angle is $sin(\theta) = 0.22 \rightarrow \theta = 12.7 deg$. [no need to divide by the index of refraction]

0.2205, 10.716, 0.4219, 27/64, 15.9, 0.626, 21.034, 0.8281, 53/64. 0.6, 0.0236, 5.7, 0.2244, 10.8, 0.4252, 16, 0.6299, 21.1, 0.8307. 0.7, 0.0276, 5.8, 0.2283 ...