How to concentrate the light, how to concentrate the light of the LED to one point

The flashlight uses the nature of parabola, the reflective surface behind the bulb is a rotating parabola, the bulb is located on the focal point, and the light will be parallel to the optical axis after reflection, which will achieve the purpose of concentration. Lasers are properties of their own. Why do you want to gather it together for home use?

First of all, you need to use the light source of the spotlight, that is, the type of bulb is the light source with a small emission angle, such as the LED light source.

And the light of the lamp depends on the reflection of the lamp. Generally, the spotlight type lights on the market, such as downlights, spotlights, etc.

This one isn't as good as you think.

It won't be the one in the movies where you can see the light from the side of the beam.

The effects in movies and television are deceptive.

In order to see the light from the side, there must be large enough particles in the air: dust, water vapor, etc.

It works very badly in ordinary air.

Put a lampshade on the back of the lamp, and the lampshade will face that way, and the light will face that way.

Of course, it is better to use a light with a concentrated light source.

With spotlights, the shape of the baffle behind the bulb is also key, and if you're pure science, you can use a convex lens or a concave mirror.

The coherence of household light sources is not good, and there is no way to achieve that effect, so it is recommended to go to the lamp store to buy some special light sources.

It is recommended to find an etiquette company and convert it into a spotlight with a beam of light effect on the stage. Hehe.

LED needs a suitable convex lens or parabolic concave mirror to be focusable, the longer the focal length of the focusing mirror, the farther the focus, and the distance of the focus needs to be selected first. Depending on how far and near the focal point is, choose the focal length of your focus. The farther away, the worse the performance of the focus.

At present, there are many kinds of LEDs, and the ordinary in-line lamp beads themselves have focusing performance, and there are a variety of emission angles to choose from, but the internal reflector cup is very small, and the resin lens in front is also simple, and the focusing effect is poor. SMD LEDs do not have focusing performance by themselves, and can also be focused by an external focusing lens.

Optical design is a more complex problem, one or two sentences are difficult to explain, it is recommended that you go to optics to take a look.

There are only convex lenses or concave lenses, but they are difficult to do in amateur conditions.

It should work with a concave-convex mirror.

Use a concave or convex lens.

Convex lens: You're asking a very broad question.

Instead of a magnifying glass, a concave mirror can be used.

Make a lampshade out of white paper.

It is the light that passes through a point and is concentrated on the opposite imaging screen to be imaged.