Low background multi-well plates for fluorescence measurements of biological and biochemical samples

Device for spectroscopic measurements, comprising: a platform; and a polymer layer with low fluorescence and high transmittance, deposited separately on said platform, wherein said polymer layer produces about 400 percent or less fluorescence compared to fused silica of about 150 micron thick to wavelengths excitation between 300 to 400 nm and wavelengths emissions between about 300 to 800 nm, and wherein said polymer layer comprises a cycloolefin polymer based on a.