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An optical microscope is used with multiple objectives attached to a part called revolving nosepiece. Commonly, multiple combined objectives with a different ...
These are available commercially at from about $0.50 from western suppliers and for much less for identical product from Chinese suppliers. See below.
A super bright 3 CREE XHP70.2 70 Watt LED rechargeable battery-powered spotlight with bottom flood LED lighting for close-range lighting or it can be used as a ...
We can use this same idea in a smaller way: use a small M&M-sized piece of aluminum foil placed directly in front of LED (glued to inside of translucent cover) to reflect focused light back to the source, and more foil around the led to spread out the light.
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You can get substantially LESS directionality from a typical existing epoxy encapsulated through hole mount LED by simply cutting part of the top off so that the end is "squarish" and closer to the die. In this case, cut off probably all of the domed part and some more. Go down too far and you risk interfering with the LED proper - but you should be able to tell how much you can probably safely remove by examination. This approximates a "top hat" or "straw hat" LED. You can round the edges but this will probably not be necessary. Practice on a cheap LED first :-).
E Harel · 2012 · 241 — Light-harvesting complex 2 (LH2) is the peripheral antenna pigment-protein complex of purple non-sulfur bacteria. LH2 contains two rings of BChl a pigments ...
Wide angle through hole LEDs are often referred to as Top Hat or Straw Hat LEDs due to their shape. The die is close to the external face and the package is often blunt ended to obtain the required radiation tpattern.
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I know I could try every option myself, but I imagine this is not a rare situation, so perhaps someone has already done something about it.
20241016 — The lens equation is 1/f = 1/do + 1/di, where f = the focal length of the lens. [4] X Research source. In our example problem, we can use the ...
A total internal reflection lens with no direct path from LED proper to subject, or a Fresnel lens based "diffuser" will do what you want.
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We believe that there is strong research demonstrating that large 10,000 lux light boxes are an effective treatment for SAD. We recently studied 24...
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The problem is: since the case is not deep enough, when I look from far I can only see the focused, pin shaped LED sources (two, in my case).
The focal length of a lens determines two characteristics that are very important to photographers: magnification and angle of view. Longer focal lengths ...
Unipolar non-seasonal depressed patients with concomitant evening chrono- type were associated with poor clinical outcomes and higher non-remission...
TIR or Fresnel lenses are available which will convert almost anything to anything - including light from narrow angle through hole LEDs to very wide angle radiation.
The way larger encasements do it is by using a small conical mirror right in front of the bulb to reflect almost all of the light back on to the larger concave mirror. (Example)
The Chinese University of Hong Kong, Department of Psychology, has conducted the “Adjunctive bright light treatment with gradual advance in unipolar major depressive disorder with evening chronotype - A 140-patient randomized controlled trial” using Nature Bright Sun Touch Plus, published by the Cambridge Press on August 18, 2020.
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You should try sanding. Rub a fine sandpaper (such as 400 grit) all over the lens of the LED until it looks opaque or covered in white dust.
Dec 5, 2019 — A lens is a piece of transparent material that is shaped so as to cause light rays to bend in a specific way as they pass through it, whether ...
2015625 — Let me go over the four common methods for creating artificial light along with the basic physics that makes them work.
As I see it, the case from the motorcycle turning light is supposed to receive the an incandescent lamp, so the internal diffusions gives its whole area the same brightness as seen from far away.