| 摘要 |
PURPOSE:To correct the changes in the spectroscopic distribution characteristic due to aging of a light source at a high accuracy with a simple and small construction by providing a total reflection prism on a rotary disc made of an opaque material together with filters for various colors. CONSTITUTION:Corresponding total reflection prisms 14r and 15r, 14g and 15g and 14b and 15b are provided on the same circle circumference of an opaque rotary disc 1 in addition to filters 2r, 2g and 2b for R, G and B used in color analysis. White light through the prism is received with a light receiving element 5 together with light via the filters 2r, 2g and 2b of a light source 6. This enables a highly accurate correction of changes in the spectroscopic distribution characteristic due to aging of the light source with a simple and small construction. |
