REFRACTOMETER USING MULTIPLE PINHOLES AND SPOT PATTERNED TARGET

摘要

PURPOSE: A refractometer using a plurality of pin holes and a spot pattern target is provided to easily measure without a separate reference point or correction while measuring because a refractive index of a test sample is measured by using a rate of change according to a target and sample table. CONSTITUTION: A refractometer using a plurality of pin holes and a spot pattern target comprises a target(12), a transfer device(19) a sample table(14), an objective lens(20), and an iris(30). The target comprises a plurality of spots. The transfer device is connected to the target, thereby moving the target up and down. The sample table is arranged in the lower part of the target and a test sample(13) is positioned. The objective lens receives lights passed through the target and sample table after being emitted from the light source(LS). The iris ramifies a light path of the light incident to the object lens to form an out-focused image on an image plane of a refractometer.