Multi-angle colorimeter

摘要

In a multi-angle colorimeter, a light detecting portion 40 includes a main light receiving window disposed in a predetermined position on a main geometry plane, and first and second auxiliary light receiving windows disposed on a secondary geometry plane, and a main photoelectric conversion element for converting a main component light received by the main light receiving window in a light reflected from a measurement point into an electrical main signal and first and second auxiliary photoelectric conversion elements for converting first and second auxiliary component lights received by the first and second auxiliary light receiving windows in the reflected light respectively into first and second electrical auxiliary signals. A calculating portion corrects the electrical main signal based on the first and second electrical auxiliary signals to obtain color information about the measurement point.

主权项

1. A multi-angle colorimeter comprising:
(a) a plurality of illuminating means disposed on a virtual reference plane including a predetermined reference line and carrying out light irradiation at different angles from each other toward a predetermined measurement point on said reference line; (b) a light detector comprising:
a main light receiving window disposed in a predetermined position on said reference plane;a plurality of auxiliary light receiving windows disposed on a plane which includes said predetermined position and said predetermined measurement point and is orthogonal to said reference plane, and opposed to said measurement point respectively;a main photoelectric conversion means for receiving a main component light received by said main light receiving window in a reflected light of said light irradiation from a measurement plane disposed on said measurement point and for converting said main component light into an electrical main signal; anda plurality of auxiliary photoelectric conversion means for receiving a plurality of auxiliary component lights received by said plurality of auxiliary light receiving windows in the reflected light of said light irradiation and for converting said plurality of auxiliary component lights into a plurality of electrical auxiliary signals, and (c) a calculating means for correcting a posture error, of said reference plane from the normal of said reference plane, of said electrical main signal based on said plurality of electrical auxiliary signals, thereby obtaining color information about said measurement plane which is present on said measurement point.