Science teacher Paul McCarl inspired his students at Whitehorse High School in Montezuma Creek, Utah to build and enter a Fresnel solar cooker in the Spirit of Innovation Award contest. The students' Native Sun Solar cooker which can make traditional fry bread was a finalist in the competition.

In optics, a dispersive prism is an optical prism that is used to disperse light, that is, to separate light into its spectral components Different ...

NitrileGloves

The focal length of a mirror and a lens can be calculated using 1/do + 1/di = 1/f, where do is the object distance, di is the image distance, and f is the focal ...

These kits contain interchangeable, non-marking vacuum-tweezer tips that are compatible with the Vacuum Pick-Up Tool included in the VP10C Kit. The 10 tips in the VP10CTB Kit have Buna-N (static-dissipative nitrile) suction cups that are electrostatic-discharge safe: the five 45°-angled tips and the five straight tips range in size from Ø1/8" to Ø1/2". They are the same as those included with the VP10C kit above, and so can be used as drop-in replacements if the VP10C kit's tips are damaged or misplaced. The VP10CTC kit comes with 9 tips that have Pureaclean (silicone rubber) suction cups: the four 45°-angled tips range in size from Ø3/32" to Ø3/8" and the four straight tips range in size Ø1/8" to Ø1/2". Pureaclean is useable in temperatures ranging from -55 to 230 °C. For more information on the sizes of the tips included in each kit, please see the table to the right.

Please use caution when handling an optic as improper use may cause damage to the optic surface. We recommend that this tool be used with optics that have a plano surface. The VP10C should not be used with gratings, pellicle beamsplitters, or any optic that has an unprotected coating.

These disposable, powder-free nitrile gloves provide protection for the user's hands, while preventing contamination and damage to optical elements being handled. Nitrile gloves are durable and chemically resistant, and they offer a latex-free alternative for those with latex allergies. They are available in five sizes (extra small, small, medium, large, or extra large), and come in packages of 100 gloves. The table below provides hand measurement guidelines for determining which glove size would fit best.

The VP10C Vacuum Pick-Up Tool Kit is ideal for lifting and handling small optics, such as lenses and mirrors, without damaging the optic. This pick-up tool is shaped like a pen for ease of use and also includes a pen clip for carrying. Each kit comes with a set of five angled and five straight interchangeable tips with Ø1/8", Ø1/4", Ø3/16", Ø3/8" or Ø1/2" Buna-N (nitrile) suction cups. Hold and then let go of the black button while contacting an optic with a suction cup to apply the vacuum force; press the black button to release the optic. In the event that any of the tips are lost or damaged, Thorlabs' VP10CTB kit offered below can be purchased for replacements.

A larger scale version of this concept is created with a series of reflective concentric rings used to redirect the sunlight onto the cook pot. Essentially, the individual ring angles are similar if one were to cut a parabolic reflector into horizontal sections and stack them concentrically. However, this would cause shading, so the diameters of the rings each need to increase slightly to allow the light to reach the cookpot.

A Fresnel lens eliminates the bulk of a convex concentrating lens with the use of a series of angled steps in the front surface of an otherwise flat sheet of glass or plastic. The steps are angled in such a way as to concentrate sunlight at the cooking pot as it passes through the lens.

Fresnel Mirrors can be made with different techniques. This is the simplest way to make a Fresnel Mirror. The beam concentrates to a 5 cm (2 in) diameter which is good for boiling water. The center is filled with the flat cut away circle not shown in this video. This is a great demo project explaining the structure of a Fresnel lens.

A larger scale fresnel concept incorporates reflective concentric rings. Photo credit: NCL blog. See information on this construction - (English version)

2Mm-6Mm Length 160-300Mm Extra Long HSS Drilling Straight Shank Drill Bits Parts 4MM 300MM ; Cutting angle string. 118 Degrees ; Brand. EECFSID ; Tool flute type.

These disposable, powder-free latex gloves prevent the transfer of oils and debris from hands to optics. Available in five sizes (extra small, small, medium, large, or extra large), these gloves come in boxes of 100. The gloves have textured fingertips that aid with picking up optics. The table to the right provides hand measurement guidelines for determining which glove size would fit best.

An electric linear actuator is the preferred solution for simple, safe, and clean movement with precise control. Our actuators come with an IP rating, ensuring ...

Figure 1. The laser cavity. An He-Ne laser works by exciting Neon atoms in the gas. The 632.8 nm.

Image taken under 400 × magnification of a male oxyurid: most likely a.. ... Wesley Eugene Hall ... Packrats Neotoma collect middens within c30m of their dens.

NylonGloves

Thorlabs offers three types of tweezers for the handling of delicate optics. Our TZ1 tweezers work well for holding the edges of Ø12 mm or smaller optics. These tweezers are made from stainless steel and have molded-carbon-fiber tips that are chemically resistant to common solvents to protect the object being handled. Alternatively, our TZ2 tweezers can accommodate Ø25.4 mm or smaller optics and are made from nylon that is chemically resistant to common lab solvents. Finally, our TZ3 self-closing tweezers are able to comfortably hold the edges of Ø19 mm to Ø25.4 mm optics, as shown in the photo to the right. The TZ3 tweezers have a polyolefin cover over each tip that is unaffected by common lab solvents and helps to grip and protect optics.

Thorlabs offers a line of optics tools designed to prevent the contamination of optical elements being handled. Items on this page include:

Sep 28, 2023 — When cleaning eyeglasses with an anti-reflective coating, it's important to use a cleaning solution specifically designed for this purpose. This ...

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The Spectralon™ is a surface of reference with a known spectrum [3] that is used for the calibration of spectral measurements of unknown surface reflectance. It ...

Please use caution when handling an optic as improper use may cause damage to the optic surface. We recommend that these tips be used with optics that have a plano surface; they should not be used with gratings, pellicle beamsplitters, or any optic that has an unprotected coating.

Oct 21, 2024 — Because the lens is curved, the center of the photo is magnified slightly more than the edges. That makes straight lines appear to curve around ...

Thorlabs offers disposable cotton gloves that are designed for handling optics and can be worn underneath latex gloves as a glove liner. They are packaged in bags containing 12 pairs of cotton gloves and are available in three sizes (small, medium, or large). The table to the right provides hand measurement guidelines for determining which glove size would fit best.

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