I need to create images at a certain wavelength range(around 850-900 nm). For this a frequently cited solution is using optical filters. However I am not being able to understand the concept behind those. A camera has image sensors which store charges, and then convert it into colored images using RGB optical filters. Now if I am to put up an optical filter that transmits wavelengths of only 850-900 nm, then what kind of image shall be captured?
From what I understand, since there is no RGB based wavelength in 850-900nm light, so the pixels will all record values (0,0,0) and we'll have just a black image.
Am I right? If not, please explain what exactly will happen and why? And is this method to capture a specific wavelength based image using optical filters the best one or even a possible one or I will have to go to the basics of image sensor development itself?