V-block refractometer

摘要

A V-block refractometer capable of enhancing measurement accuracy is provided. An incident angle of measurement light incident on a V-block prism 1 from a collimator lens 48 is changed through the rotation of a motor 7, and the measurement light from the V-block prism 1 at each incident angle is detected by a detector 2. This configuration eliminates the need to provide the detector 2 near the motor 7 as in the conventional art, whereby deterioration in measurement accuracy caused by an increase in load to the motor 7 can be prevented, and the measurement accuracy can be enhanced.

主权项

1. A V-block refractometer that measures a refractive index of a sample by irradiating the sample with measurement light through a V-block prism, the refractometer comprising:
a collimator lens that allows measurement light to be incident on the V-block prism after converting the measurement light into parallel light; a telemeter lens that converges the measurement light passing through the V-block prism; a detector that detects the measurement light from the telemeter lens; a collimator lens holding member that is provided to be rotatable about a predetermined first rotation shaft for holding the collimator lens at an eccentric position relative to the first rotation shaft; and a motor that changes an incident angle of the measurement light incident on the V-block prism from the collimator lens by rotating the collimator lens holding member about the first rotation shaft.