Could illuminating a subject with different LEDs be used instead of bandpass filters?
I am experimenting with capturing surface reflectance using a monochrome camera. The traditional approach to capturing specific reflected wavelength bands is to take multiple photos each with a bandpass filter in front of the camera which only allows a small band of light wavelengths pass.
I will be capturing photos under very controlled lighting, all external light sources will be blocked and the subject will be surrounded by an array of LEDs.
I understand that you can't just use white or RGB LEDs as they will only emit in three different bands. A full spectrum of LEDs emitting at different bands would be needed.
Here is a good chart showing individually available LEDs and their wavelengths: https://www.lumex.com/article/led-color-guide
If this could work the main advantage would be eliminating the need to mechanically change the filters which in turn would eliminate vibrations and speed up the capture process. Probably also reduce costs.