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Optical Toy
We believe these rectangular plastic lenses were intended for the view finders in inexpensive cameras. at 15mm x 21.5mm, with a short (-80mm) focal length, and a half aluminized side, they produce a reduced scale image projected onto another image. For instance, hold the half aluminized side toward you about 4" from your eye, and look at a wall. You will see a magnified image of your eye "projected" on a slightly out of focus and reduced image of the wall!! Now move the lens about 10" from your eye, put the tip of a pen about 2" from the lens and you get a big image of the pen superimposed on a reduced image of the rest of the world. Your get the idea!! Good to muse about, explain the optics for a science project, or just use to show your friends how weird the people at American Science are. We'll send you two so your friends can show their friends!!
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2130 OPTICAL TOY |
Prince Plastic
Sure, when it comes to optical precision, glass is king. But in other categories (price!), plastic is definitely heir to the throne. If you're not looking for precision, but just for some funky lenses for your art project, model or for messing around with light, these 20mm dia PCV lenses will work royally. 6.6mm thick, clear plastic with a -60mm focal length. With (2) 1/8" dia mounting nubs on the side; they should file right off if you don't like them. So let the bluebloods waste their bread on glass; you've got plastic.
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27657 PLASTIC 20MM PCV |
Projection Lenses
The following is a partial listing of the projection type lens assemblies the we currently have on hand. Quantities may vary from just a few pieces to a thousand or more. If there is a particular lens that might fulfill a production requirement, we would be pleased to provide information on total availability and larger quantity pricing. All of these lenses are in excellent condition, although few may have cosmetic defects in the barrels or mounts. We have intentionally kept the prices quite low in relation to OEM costs to enable small quantity users to experiment with them.
| FOCAL LENGTH | SPEED | ||||
|---|---|---|---|---|---|
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27379 F:4 LENS | 28mm | F:4 | Details | |
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68996 PROJ. LENS, 1" F:1.6 | 1" | F:1.6 | Details |
$2.75
EACH
Out of Stock. Check Back Soon! |
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68989 PROJ. LENS, 3/4"-1" F:1.4 | 3/4"-1" | F:1.4 | Details | |
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42370 PROJ. LENS, F:6.3 | 24mm | F:6.3 | Details |
Double Vision
A clever twin-lensed loupe that clips on eyeglasses for hands-free magnification. Each 1" dia, 3.3-power glass lens is at the end of a thin metal arm and swivels easily. The metal clip mechanism is about 1-1/2" long, each lens and arm about 2-1/2" long. Use a single lens, or line two up to double the loupe to a 6.6 power. Individually, each has a 3" working distance. When they're used together, it's 1-1/2".
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91793 2 IN 1 LOUPE |
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DCX Lens
This nice handful of plastic lenses is just the ticket for a primary-school teacher who needs unbreakable samples, and who wouldn't mind having a few interesting pieces left for craft projects. Each DCX lens is 20mm dia, 34.5mm focal length. Not individually wrapped, so a few may have small surface scratches.
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68093 PLASTIC LENS |
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The Mother Of All Fresnel Lenses
It came from either outer space, or a projection TV. Our largest Fresnel lens measures 49-1/8" x 37-1/8" x 1/16" or 1/8" thick, with a 42" focal length. Build your own lighthouse or projection TV, teach optical properties to students, or just turn your 21-inch model into one with a tavern-size picture. Held in the sun, the lens will concentrate rays enough to cook eggs or torch lumber. And, under adult supervision in the parking lot, employees of a certain un-named scientific and surplus purveyor actually melted pennies in seconds. Extremely cool and done strictly, we assure you, to determine the lens's focal length. Do not, we shouldn't have to remind you, store this puppy in direct sunlight. Or let the underage or under-mature sneak it into the sunlight.
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37930 HUGE FRESNEL LENS Note: This item is not eligible for Expedited Shipping or delivery to Alaska, Hawaii, or the Territories. |
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