The laser Coherent built during the summer of 1966 was the first carbon dioxide laser available commercially. The power output of the company's first product ...

On all orders $90USD+ we offer free 2-7 business day standard shipping in the US + CA and 11-20 business day shipping in the UK. Unfortunately we are unable to make deliveries to PO boxes, APO/FPO, or US military bases outside the US.

When one thinks of a magnifying glass, they tend to think of the big Sherlock Holmes type lens. However, in actual use, you want a lightweight, and powerful magnifier that has impeccable optics and is simple to use. Utilizing the best magnifier for demanding jobs like inspecting diamonds and gemstones is essential to their occupation, while hobbyists who collect rocks and minerals just need to buy a decent magnifier that they can afford to lose.

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I have not been able to personally view a selection of handheld glasses because what l need are too expensive for stores here to carry. I am therefore forced to go online. The problem there is to determine if what is offered meets my need. They all different prices from $5.00 to $1500.00. Apparently the greater the magnification the higher the price. So what do l order?

On Amazon 35mm & 50mm 3x glasses are available. Better to have 2 glasses of same size & put it in one case (cover) after opening original rivett , put two lens together having 2 or three small aluminum washers so glasses may not touch or rub each other & use a long rivett used in a baggage which at end has split part. I did that & works very nice for reading.

Why is it that magnifying glasses aren’t labeled accurately and that the X doesn’t truly mean twice as big. If I view a quarter which is .75 inch and then view it from the same distance using a 10X lens I’d expect it to be 10 times the size 7.5 inches but it’s closer to 2 inches. What the hell ?

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Go to an optometrists office. I bought one for my mother who has macular degeneration. It is ery hood and has a light on it. Well worth the money.

The view through the magnifying lens should be crystal clear with no internal reflections. Highlights should be sharp and brilliant, with no colored fringes. The lens should be achromatic. A flat object should not look buckled or warped. A magnifier should not be loosely put together.

The thermal expansion is only nearly linear if the material does not exhibit a phase transition in the temperature range of interest.  There are many materials for which such phase changes do occur.  For instance, in a polymeric material there is such a thermal expansion rate-changing phase transition when the polymer passes through a crystalline or a glass transition.  In some plastic materials specimens, different parts of the specimen may have different transition temperatures, such as we have found dramatically illustrated in the plastic encapsulation of an IC package due to the effects of a heat sink on the processing of the plastic encapsulation material.  Glassy materials also have a glass transition temperature.  Of course phase changes may also occur in metal and inorganic chemical samples also.

I seek a magnifying glass to supplement my reading glasses but would like to try them out first. Where can I go to see and test before buying? My postal area is PE7 1QW.

My mom has macular degeneration, and she’s completely blind in her left eye what type of magnifying, reader or glass would be good for her to be able to put words under there and see them. Please advise. Thank you.

Given the same X (times) factor, a larger lens is always better. There are tons of cheap inferior magnifying glasses out there claiming 20X, 30X, and even 45X magnifications, yet they sell for less than $10. These are false claims as any magnifier over 20X magnification will have such a small field of vision that they are no longer considered magnifiers, but rather loupes. Higher quality lenses with high magnifications are also more difficult to produce, consequently they tend to be more expensive.

5X and 6X Lenses are the most popular choices for an average user as it offers higher magnification without sacrificing the field of vision (diameter of the lens). On the other hand, a 10X magnifier will reduce the field of vision significantly, but it will give you a closer look at tiny rocks, crystals, minerals, microfossils, etc.

2) Place the magnifying glass on a piece of white paper and see if the lens adds any color of its own. Then pick it up and examine other objects, specifically objects with more colors.

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CP2102 USB to serial adapter RS232 RS485 RS422 3 protocols in 1 for Multi-Kind Control Devices: easily let you connect RS-232, RS-485 or RS-422 device ...

We take immense pride in our products and know you're going to love them as much as we do. If you're not 10/10 obsessed, let us know within 30 days for our 100% money back guarantee.

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We take immense pride in our products and know you're going to love them as much as we do. If you're not 10/10 obsessed, let us know within 30 days for our 100% money back guarantee.

The most popular and comparable option for full-frame shooters is a 24–70mm f/2.8 zoom lens. Since full-frame cameras have inherently shallower depth of field ...

The block light level decreases by one for each meter (block) of taxicab distance from the light source. This applies to each of the 3 coordinate axes. In other ...

Fig. 2.  Thermal expansion of a TEFLON® material with a slightly lower degree of crystallization and a much greater overall thermal expansion.

The most difficult component of an optical microscope to design and assemble, the objective is the first element that light encounters as it passes from the ...

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I am trying to find a magnifying glass for a friend of mine that has muscular degeneration and is having a hard time reading the newspaper. She probably needs 5X strength. Where can she go to see one or buy one? The zip code is 44512, Youngstown Ohio.

The X (times) factor of a magnifying glass refers to how much it magnifies. An average magnifying glass makes objects look 2 or 3 times bigger, which means it magnifies 2X or 3X. Geologists often like to have 5X to 10X magnification; however, anything higher than 10X is difficult to use in the field because the lenses are too small.

TMA dilatometry was used to characterize the properties of various PTFE powder materials. These were examined after pressing them into sheets. The sheet thickness was measured from -100°C to 200°C using a ramp rate of 4°C/min. The first of several TEFLON® materials (Figure 1) exhibits an extensive crystalline transition at approximately 19°C due to a transformation of the Phase II helix crystal structure first to the Phase IV hexagonal crystal structure and then to the Phase I hexagonal crystal structure. This large peak created at transition indicates a PTFE which has a substantial crystalline phase and exhibits a drastic dimension change as it changes the crystalline phase. Also shown by the TMA is the softening point (Tg or Ts) of the TEFLON® at approximately 160°C. Data for another of several samples is seen in Figure 2. This TEFLON® material exhibits a significantly smaller crystalline to amorphous transition dimension increase compared to the material observed in Figure 1. This material initially consisted of a greater concentration of amorphous material. For our customer’s intended use, a rapid thermal expansion of a PTFE material at the crystalline transition temperature could not be tolerated. Their requirement was therefore for an amorphous PTFE material. Note that the first PTFE material has almost no temperature range with a linear thermal expansion characteristic.

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Hi, notice on Amazon there are a plethora of magnifying glasses to choose from and very little information about quality of lenses as you point out above. But instead of beauty related products, I am interested in magnifying maps with tiny font or doing close electronics work in a hands-free mode. Do I want a headset or a floor mounted magnifying lens? The search is about! Chas

Buying a brand name magnifier, while not always a guarantee of quality, means you can contact the manufacturer if anything goes wrong. Fancii Optics offer a 100% money back guarantee on all our magnifiers. If you are not satisfied with our product within 60 days of purchase, we will refund you your money back.CLICK TO SHOP RECOMMENDED MAGNIFIERS

Inquiries about CTE or thermal expansion measurements can be addressed to Dr. Priyanshu Banerjee at Priyanshu@andersonmaterials.com, or call 1-410-740-8562, or you can find other contact information on our “Contact Us” page.

KEYENCE Canada provides Digital Microscopes; Next-generation optical microscope with a large depth-of-field and advanced measurement capabilities for ...

On all orders $90USD+ we offer free 2-7 business day standard shipping in the US + CA and 11-20 business day shipping in the UK. Unfortunately we are unable to make deliveries to PO boxes, APO/FPO, or US military bases outside the US.

This is great. I’m a carpet cleaner and it’s often hard to spot tiny imperfections in the carpets I clean. A magnifying glass helps so much!

It is better to join two 35 or 50mm , 3 or 3.5x magnifying glasses with having thin one or two washers between glasses ro avoid rubbing & using a rivet which has a split at the end & qhich is normally used on baggages. This combination of glasses works fine for reading very small written letters.

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C Mount Lens to Micro 4/3 Adapter III. Sales Price: $65.00. C Mount to Sony E-mount Adapter. Sales Price: $65.00. Copyright @ 2012-2024 Global Boom ...

Anti glare glasses, or lenses treated with Anti glare coatings, also known as anti reflection, reflection free, AR or MAR coatings, were developed to reduce ...

CTE, or the coefficient of thermal expansion, is measured using our ThermoMechanical Analyzer, or TMA.  The thermal expansion of materials is not actually linear, but the quadratic expansion term is often small, so the thermal expansion is often close to linear over an extended temperature range.

I wear prescription glasses and need magnifying glass with headset to practice calligraphy. Do I wear them over my eyeglasses or without?

Hold the lens up next to your eyes while bringing the object close to it - about a few centimeters from your face. The idea is to focus your attention through the magnifying lens, the same way you look through eyeglasses. If you normally wear glasses, you will need to keep them on. A magnifier won't correct for astigmatism as well.

Beware of buying the magnifying jewelers loupe 45x on eBay and the 100x on amazon the 45x is 6.95 and the 100x is over 20 dollars on amazon I ordered both both , and both are the 45x with identical numbers, this needs to be reported.. one co. is mega mail online, another is Pandacub 1990, just wanted to let people know about the scam, Thanks.

Optical Grade Fiber Optics provides higher transmission in industrial light guides to short distance data transmission and are available at Edmund Optics.

I have macular degeneration. Rt. eye is wet, Lt. eye dry. I am looking for a magnifying glass that lets me read letters or documents too small for me to read as it is.

I truly want to see the item at a minimum of five times its actual size, more probably 10 times the actual size because I would not be using a magnifying glass if I didn’t want to look at something really really small. I’m not using this as a reader. I bought a digital microscope but and somewhat unimpressed because I have to be a foot above the coin to be able to see the whole coin so I was hoping to be able to buy a hand magnifier with a 4 to 8 in lens that would give me nice easy clear views

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Good Morning, I have been trying to find out how to enlarge the field of view on the 5 glass magnifying system but have not received an answer after sending two pictures of the product as requested. Since it was done with your system it does not seem to give me a way of resending them at this time. Ed Shephard.

Sep 21, 2021 — Are Lasers Bad for Cats? · Don't use the laser in a way that overworks your cat or allows them to hurt themselves. · Be careful where you aim ...