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fir1st2014-03-02 15:56:02
Working with color
fir1st, 2014-03-02 15:56:02

What happens if you attach a colored optical filter (for a camera) to a flashlight? Will the light be the color of the filter?

I want orange light.
There is a flashlight, for example: www.aliexpress.com/item/SecurityIng-Waterproof-800...
There is a filter: www.aliexpress.com/item/Free-shipping-High-Quality...
Will it work? What needs to be done to make it work? Because everything is bought from afar, that is, are there any simpler solutions, they say, like an orange tinted film (difference?), etc., otherwise there is a possibility that the filter will not work because it is not native.

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3 answer(s)
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Noxa, 2014-03-02
@Noxa

Remember physics from school.
Simplifying, you can imagine that your flashlight emits three wavelengths, for example, red, blue and green.
The filter, for example, passes only red light. Then if you look through the filter at the flashlight you will see only the red radiation that has passed through the filter. The remaining two components (blue and green) will be absorbed by the filter. And if you look through this filter at a lamp that shines only blue, it will seem to you that the lamp is turned off.
All this is very simplified and in real life it does not work quite like that. But it allows us to understand the answer to the question: yes, the filter will color the radiation of a flashlight, in the radiation of which there are wavelengths transmitted by the filter.

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MisterSpock, 2014-03-27
@MisterSpock

For your purposes, there are special light filters made of folic film. Search for "monochrome gel filters", "colored filters for flash", "studio light", etc.
Camera filters are very rarely monochromatic, and their job is to attenuate rather than destroy color transmission in other parts of the spectrum.

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Konstantin8632, 2014-04-22
@Konstantin8632

I will offer an alternative to the light filter.
Because The light filter cuts off part of the spectrum - the luminous flux will be significantly less. I suggest replacing the standard LEDs in the flashlight with orange ones. As a result, there will be a "pure" orange light without loss of light output. If there are lamps, not LEDs, the recommendation is the same, but the orange bulbs are simply already covered with a layer of light filter.
Lamps can be tried to buy in a car shop. Colored LEDs are available at any Chip-and-Dip type electronics store.
I would most likely do the same.

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