SPECTROPHOTOMETRIC DEVICE

摘要

PURPOSE:To enable spectrophotometry and colorimetry with high accuracy with any light sources even if the position setting with an incident optical system is rough by coupling an optical fiber bundle to a small-sized integrating sphere having two apertures and a sheet of light shielding plate so as to meet the optical system within a monochrometer. CONSTITUTION:The small-sized integrating sphere 1 is provided with the apertures 2, 3 which vary in the direction from the center thereof by about 90 deg. and the light shielding plate 4 between the point apart by about 90 deg. from the aperture 2 in the direction opposite to the aperture 3 and the aperture 2. The monochrometer 7 has an opening angle thetam from an incident slit 8 to a concave diffraction grating 9 and the optical fiber bundle 6 connected at one end to the slit 8 is specified in diameter (d) and numerical aperture N.A. to N.A.-sin(theta/2) or N.A.>sin(theta/2). A light shielding hood 5 is fixed to the other end of the bundle 6 apart at the distance L of L>>d from the aperture 3. The diameter D of the aperture 3 is selected at the size A-2Ltan(thetam/2).