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What objects has the most saturated colors?

Started Nov 24, 2021 | Discussions thread
Bernard Delley Senior Member • Posts: 2,041
Laser pointer
2

petrochemist wrote:

Entropy512 wrote:

LEDs without phosphor coatings (e.g. most color LEDs, but not white) are strongly monochromatic. If you're REALLY picky you will want to additionally filter the wavelength because they do have a few nanometers of bandwidth, but for the most part, color LEDs are going to be the cheapest and simplest way to get strongly monochromatic/saturated light sources.

Colored LEDS can indeed be fairly good, but the spectral power distribution for standard color LEDS is typically about 50nm bandwidth see wikipedia. They'll very probably be good enough for the OP.

Laser pointers are quite cheap and have negligible bandwidth for the present purpose.

violet laser 405 nm  (GaN)

green laser 532 nm (frequency doubled from Nd:YAG diode pumped)

red laser ~ 650 nm ?

and further types are easily available.

Uneven illumination, speckle, may be an issue. Shining a blue laser on a white surface may easily add to the spectrum due to fluorescence by the surface material.

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