Thorlabsmirror

We show numerically that the reflectivity of multilayer extreme-UV (EUV) mirrors tuned for the 11–14-nm spectral region, for which the two-component, Mo/Be and Mo/Si multilayer systems with constant layer thickness are commonly used, can be enhanced significantly when we incorporate additional materials within the stack. The reflectivity performance of the quarter-wavelength multilayers can be enhanced further by global optimization procedures with which the layer thicknesses are varied for optimum performance. By incorporating additional materials of differing complex refractive indices—e.g., Rh, Ru, Sr, Pd, and RbCl—in various regions of the stack, we observed peak reflectivity enhancements of as much as ∼5% for a single reflector compared with standard unoptimized stacks. We show that, in an EUV optical system with nine near-normal-incidence mirror surfaces, the optical throughput may be increased by a factor as great as 2. We also show that protective capping layers, in addition to protecting the mirrors from environmental attack, may serve to improve the reflectivity characteristics.

Even when you understand this principle, you can never be 100% sure that the Wireless signal will work in your environment, this is why we at Ultra Secure Direct give our customers the best possible pre-purchase advice and a no quibble 30 day wireless money back guarantee, allowing plenty of time to try the device.

Metallicmirror

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Before we get into the ‘Line of Sight’ discussion, there is a basic principle which is sometimes misunderstood, the actual route the Signal will attempt to take is ‘Direct’, please see the two diagrams below:

Edmund OpticsMirror

We show numerically that the reflectivity of multilayer extreme-UV (EUV) mirrors tuned for the 11–14-nm spectral region, for which the two-component, Mo/Be and Mo/Si multilayer systems with constant layer thickness are commonly used, can be enhanced significantly when we incorporate additional materials within the stack. The reflectivity performance of the quarter-wavelength multilayers can be enhanced further by global optimization procedures with which the layer thicknesses are varied for optimum performance. By incorporating additional materials of differing complex refractive indices—e.g., Rh, Ru, Sr, Pd, and RbCl—in various regions of the stack, we observed peak reflectivity enhancements of as much as ∼5% for a single reflector compared with standard unoptimized stacks. We show that, in an EUV optical system with nine near-normal-incidence mirror surfaces, the optical throughput may be increased by a factor as great as 2. We also show that protective capping layers, in addition to protecting the mirrors from environmental attack, may serve to improve the reflectivity characteristics.

Line of Sight Principle, for this example we are going to imagine using a Dakota Wireless Driveway Alarm which has an advertised wireless range of 900 metres, but the principle is the same for all Wireless products:

The term ‘Line of Sight’ means that a Wireless Signal has been tested in open air, normally in optimum conditions for the transmission distance to be measured between two devices, commonly seen when purchasing Wireless Alarms.

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Although this could be seen as slightly misleading, unfortunately it is the industry standard and no manufacturer is going to change when all of their competitors are doing the same, therefore we just need to understand the principle and make more informed decisions whilst making a purchase.

So you are about to purchase a Wireless House Alarm, Driveway or Perimeter Alarm or a CCTV System, then we recommend you take notice of the advertised transmission range of any product you are researching, then take into account the proposed location of the transmitters & receivers and the quantity and nature of all obstructions. Then hopefully using the information gleaned from this article, you will feel more comfortable to make a purchase. Ultra Secure Direct do test the transmission range of every wireless product they advertise, so are in a very good position to give you good honest advice via the Telephone, Email or Live Chat should you want or need some guidance.

Mirrors Optics

Be-Based 80-Period Multilayer Stacks Tuned for 11.3 nm Indicating the Peak Reflectivity (R) and the Relative Values of R9, Peak and Integrated

The above example of the route of a Wireless Signal is incorrect, please see the diagram below showing a more realistic route that the signal will attempt to take.

The examples listed above are only approximate, because the possible variations from home to home, business to business are just too numerous to mention, but hopefully it has helped you understand the principle enough to help you make a more informed decision.

Saša Bajt, Henry N. Chapman, Nhan Nguyen, Jennifer Alameda, Jeffrey C. Robinson, Michael Malinowski, Eric Gullikson, Andrew Aquila, Charles Tarrio, and Steven Grantham Appl. Opt. 42(28) 5750-5758 (2003)

Please Note: You would expect larger reduction in transmission range through obstructions when using products which are transmitting Video such as Wireless CCTV & Wireless Intercoms due to more data being transfered!!

Using our past experience we have listed different materials below, and a guide to some possible Wireless Transmission Reductions you may experience:

Holeymirror

Flatmirror

A. Wonisch, U. Neuhäusler, N. M. Kabachnik, T. Uphues, M. Uiberacker, V. Yakovlev, F. Krausz, M. Drescher, U. Kleineberg, and U. Heinzmann Appl. Opt. 45(17) 4147-4156 (2006)

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The authors are with the Optics Research Group, Faculty of Applied Sciences, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands.

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Si- and Rb-Based 50-Period Multilayer Stacks Tuned for 13.4 nm Indicating the Peak Reflectivity (R) and the Relative Values of R9, Peak and Integrated